Item 1.    Business.

The Company.

        We are a real estate investment trust, or REIT, that was organized under the laws of the state of Maryland in 1998. As of December 31, 2009, we owned 298 properties located in 35 states and Washington, D.C. On that date, the undepreciated carrying value of our properties, net of impairment losses, was $3.3 billion. Our portfolio includes 232 senior living properties with 26,937 living units / beds, 56 medical office, clinic and biotech laboratory buildings, or MOBs, with 2.9 million square feet of space and 10 wellness centers with approximately 812,000 square feet of interior space plus outdoor developed facilities.

        Our principal executive offices are located at 400 Centre Street, Newton, Massachusetts 02458, and our telephone number is (617) 796-8350.

        We believe that the aging of the United States population will increase demand for existing senior apartments, independent living properties, assisted living properties, nursing homes, MOBs, wellness centers and other medical and healthcare related properties. We plan to profit from this demand by purchasing additional properties and leasing them at rents that are greater than our costs of capital and other ownership costs and by structuring leases that provide or permit for periodic rental increases.

        Our business plan contemplates investments in age restricted apartment buildings, independent living properties, assisted living properties, nursing homes, rehabilitation hospitals, MOBs and wellness centers. Some properties combine more than one type of service in a single building or campus. Our Board of Trustees establishes our investment, financing and disposition policies and may change them at any time without shareholder approval.

        Senior Apartments.     Senior apartments are marketed to residents who are generally capable of caring for themselves. Residence is usually restricted on the basis of age. Purpose built properties may have special function rooms, concierge services, high levels of security and assistance call systems for emergency use. Residents at these properties who need healthcare or assistance with the activities of daily living are expected to contract independently for these services with homemakers or home healthcare companies.

        Independent Living Properties.     Independent living properties, or congregate care communities, also provide high levels of privacy to residents and require residents to be capable of relatively high degrees of independence. Unlike a senior apartment property, an independent living property usually bundles several services as part of a regular monthly charge. For example, an independent living property may include one or two meals per day in a central dining room, daily or weekly maid service or a social director in the base charge. Additional services are generally available from staff employees on a fee for service basis. In some independent living properties, separate parts of the property are dedicated to assisted living or nursing services.

        Assisted Living Properties.     Assisted living properties typically have one bedroom units which include private bathrooms and efficiency kitchens. Services bundled within one charge usually include three meals per day in a central dining room, daily housekeeping, laundry, medical reminders and 24 hour availability of assistance with the activities of daily living, such as dressing and bathing. Professional nursing and healthcare services are usually available at the property on call or at regularly scheduled times.

        Nursing Homes.     Nursing homes generally provide extensive nursing and healthcare services similar to those available in hospitals, without the high costs associated with operating theaters, emergency rooms or intensive care units. A typical purpose built nursing home includes mostly rooms with one or

1

Table of Contents

two beds, a separate bathroom and shared dining facilities. Licensed nursing professionals staff nursing homes 24 hours per day.

        Rehabilitation Hospitals.     Rehabilitation hospitals, also known as inpatient rehabilitation facilities, or IRFs, provide intensive physical therapy, occupational therapy and speech language pathology services beyond the capabilities customarily available in nursing homes. Patients in IRFs generally receive a minimum of three hours of rehabilitation services daily. IRFs often also provide outpatient services to patients who do not remain overnight. Our two rehabilitation hospitals have beds available for inpatient services and provide extensive outpatient services from the hospitals' premises, such as rehabilitation services for amputees, brain injury, cardio-pulmonary conditions, orthopedic conditions, spinal cord injury, stroke and neurorehabilitation.

        Medical office, clinic and biotech laboratory buildings.     The MOBs are office or commercial buildings constructed for use or operated as medical office space for physicians and other health personnel, and other businesses in medical related fields, including clinics and laboratory uses.

        Wellness Centers.     Wellness centers typically have gymnasiums, strength and cardiovascular equipment areas, tennis and racquet sports facilities, pools, spas and children's centers. Professional sport training and therapist services are often available. Wellness centers often market themselves as clubs for which members may pay monthly fees plus additional fees for specific services.

        Other Types of Real Estate.     In the past, we have considered investing in real estate different from our existing property types, including some properties outside the United States of America, or U.S. We may explore such alternative investments in the future.

2

Table of Contents

         Five Star Quality Care, Inc.     We lease 190 senior living communities and two rehabilitation hospitals to Five Star Quality Care, Inc., or Five Star, (NYSE Amex: FVE) for annual rent of $188.0 million, including percentage rent based on increases in gross revenues at certain properties ($3.6 million in 2009). Substantially all of the revenues at most of these senior living communities are paid to Five Star by residents from their private resources. Five Star pays percentage rent equal to 4% of the increase in gross revenues at 183 of the 190 senior living communities over base year gross revenues as specified in the lease terms and pays no percentage rent at the two rehabilitation hospitals.

        Lease No. 1 (which is comprised of four separate leases) expires in 2024 and includes 89 properties, including independent living communities, assisted living communities and skilled nursing facilities, of which 28 secure mortgage debt payable to third parties. At December 31, 2009, the annual rent for Lease No. 1 was $53.8 million, including percentage rent of $1.0 million.

3

Table of Contents

        Lease No. 2 expires in 2026 and includes 49 properties including independent living communities, assisted living communities, skilled nursing facilities and two rehabilitation hospitals. At December 31, 2009, the annual rent for Lease No. 2 was $49.3 million, including percentage rent of $1.1 million.

        Lease No. 3 expires in 2028 and includes 28 properties, including independent living and assisted living communities, all of which secure mortgage debt payable to the Federal National Mortgage Association, or FNMA, (NYSE: FNM). At December 31, 2009, the annual rent for Lease No. 3 was $61.9 million, including percentage rent of $1.3 million.

        Lease No. 4 expires in 2017 and includes 26 properties, including independent living communities, assisted living communities and skilled nursing facilities. At December 31, 2009, the annual rent for Lease No. 4 was $23.0 million, including percentage rent of $178,000.

        Five Star was formerly our 100% owned subsidiary. We created Five Star in 2000 to operate nursing homes which we repossessed from former tenants who defaulted their leases. We distributed substantially all of our ownership of Five Star to our shareholders on December 31, 2001. One of our Managing Trustees is currently a Managing Director of Five Star, and Reit Management & Research LLC, or RMR, provides management services to both us and Five Star. As of December 31, 2009, Five Star is responsible for 57% of our annualized rents. Since it became a separate public company by the spin off to our shareholders, Five Star has not been consistently profitable. However, we believe Five Star has adequate financial resources and liquidity to continue its business and to meet its obligations to us. For more information about our dealings and relationships with Five Star, and about the risks which may arise as a result of these related person transactions, please see Item 1A, "Risk Factors—Risks Related to Our Relationships with RMR and Five Star" and Item 7, "Management's Discussion and Analysis of Financial Condition and Results of Operations—Related Person Transactions" of this Annual Report on Form 10-K.

         Sunrise Senior Living, Inc.     Until 2003, Marriott Senior Living Services, Inc., or MSLS, was our tenant for these 14 properties. In March 2003, Marriott International, Inc., or Marriott, (NYSE: MAR) sold MSLS to Sunrise Senior Living, Inc., or Sunrise, (NYSE: SRZ) and MSLS changed its name to Sunrise Senior Living Services, Inc., or SLS. SLS is a 100% owned subsidiary of Sunrise. These properties are leased to 2013. The annual rent we received in 2009 from this lease was $32.4 million, including percentage rent of $4.3 million based on increases in gross revenues at these properties. Marriott continues to guarantee the rent due to us for these 14 properties leased to Sunrise.

         Brookdale Senior Living, Inc.     We lease 18 assisted living properties to a subsidiary of Brookdale Senior Living, Inc., or Brookdale, (NYSE: BKD) until 2017. The annual rent under this lease is $8.2 million per year, including percentage rent of $1.2 million based on increases in gross revenues at these properties. Residents pay a large majority of the revenues at these properties from their private resources. Brookdale guarantees this rent to us.

         Genesis HealthCare Corporation.     We lease one nursing home to a subsidiary of Genesis HealthCare Corporation, or Genesis, a privately owned company, for $1.6 million of annual rent until 2016. Genesis has guaranteed the rent payable to us under this lease and we hold a security deposit of $235,000 to secure payment of this rent.

         ABE Briarwood Corp.     We lease one skilled nursing facility in Canonsburg, PA to a subsidiary of ABE Briarwood Corp., a privately owned company, for $1.3 million of annual rent until December 31, 2010. Our property is sub-leased to THI of Pennsylvania at Greenery of Canonsburg, LLC, a subsidiary of another private company, THI of Baltimore, Inc. Our lease is guaranteed by ABE Briarwood Corp., IHS Long Term Care, Inc. and THI of Baltimore, Inc., and is secured by a security deposit of $600,000.

         HealthQuest, Inc.     We lease two skilled nursing facilities and one independent living facility located in Huron and Sioux Falls, SD to HealthQuest, Inc., a privately owned company, until 2016. The

4

Table of Contents

lease is guaranteed by the individual shareholder of HealthQuest, Inc. The rent payable to us is approximately $1.3 million per year and will increase at agreed times during the lease term.

         Covenant Care, LLC.     We lease one skilled nursing facility in Fresno, CA to a subsidiary of Covenant Care, LLC, a privately owned company, for $1.1 million of annual rent until 2015. The rent is scheduled to increase at agreed times during the lease term. Covenant Care, LLC guarantees the lease and has secured its obligation with a security deposit of $900,000.

         Evergreen Washington Healthcare, LLC.     We lease one skilled nursing facility in Seattle, WA to a subsidiary of Evergreen Washington Healthcare, LLC, a privately owned company, until 2015. The rent payable to us averages $930,000 per year during the lease term, although it is currently $958,000 per year and increases at agreed times during the lease term. Evergreen Washington Healthcare, LLC guarantees this lease and its lease obligations are secured by a security deposit of $385,000.

         The MacIntosh Company.     We lease one skilled nursing facility in Grove City, OH to The MacIntosh Company for $599,000 per year until 2019. A management company affiliate of this tenant and the former and current majority shareholders of the tenant guarantee this lease.

         Starmark Holdings, LLC (Wellbridge).     We lease six wellness centers located in four states under three separate leases to subsidiaries of Starmark Holdings, LLC, or Starmark, a private company. Starmark is a subsidiary of Central Sports Co. LTD, a publicly owned company listed on the Tokyo Stock Exchange. These properties operate under the brand Wellbridge and the leases are guaranteed by Starmark. These leases have a current term expiring in 2023 and require aggregate annual rent of $6.5 million, plus consumer price index based increases.

         Life Time Fitness, Inc.     We lease four wellness centers located in four states under one lease agreement to a subsidiary of Life Time Fitness, Inc., or Life Time Fitness, (NYSE: LTM). This lease is guaranteed by Life Time Fitness. The lease has a current term expiring in 2028. The rent payable to us averages $10.6 million per year during the lease term, although it is currently $9.1 million per year and increases at scheduled times during the lease term.

         Medical office, clinic and biotech laboratory buildings (MOBs).     We own 56 multi-tenanted MOBs located in 12 states and Washington, D.C. These properties range in size from 1,700 to 154,400 square feet and have a total of 2.9 million square feet. These properties are 96% occupied as of December 31, 2009 under leases to approximately 200 tenants for current terms expiring between 2010 and 2034. The rent payable to us from these MOBs is currently $76.2 million per year, plus some scheduled increases and reimbursements of certain operating and tax expenses.

Lease Terms.

        Our leases of senior living facilities and wellness centers are so-called "triple net" leases which generally require the tenants to pay rent, to pay all operating expenses of the properties, to indemnify us from liability which may arise by reason of our ownership of the properties, to maintain the leased properties at their expense, to remove and dispose of hazardous substances in compliance with applicable law and to maintain insurance for their own and our benefit. In the event of partial damage, condemnation or taking, these tenants are required to rebuild with insurance or other proceeds, if any; in the case of total destruction, condemnation or taking, we receive all insurance or other proceeds and these tenants are required to pay any positive difference in the amount of proceeds and our historical investments in the affected properties; in the event of material destruction or condemnation, some of these tenants have a right to purchase the affected property for amounts at least equal to our historical investment in the affected property.

5

Table of Contents

        Events of Default.     Under our leases of senior living facilities and wellness centers, events of default generally include:

•

failure of the tenant to pay rent or any other money when due;



•

failure of the tenant to provide periodic financial reports when due;



•

failure of the tenant to perform other terms, covenants or conditions of its lease and the continuance thereof for a specified period after written notice;



•

failure of the tenant to maintain required insurance coverages; or



•

revocation of any material license necessary for the tenant's operation of our property.

        Default Remedies.     Upon the occurrence of any event of default under leases of our senior living facilities and wellness centers, we generally may (subject to applicable law):

•

terminate the affected lease and accelerate the rent;



•

terminate the tenant's rights to occupy and use the affected property, rent the property to another tenant and recover from the tenant the difference between the amount of rent which would have been due under the lease and the rent received under the reletting;



•

make any payment or perform any act required to be performed by the tenant under its lease;



•

exercise our rights with respect to any collateral securing the lease; and



•

require the defaulting tenant to reimburse us for all payments made and all costs and expenses incurred in connection with any exercise of the foregoing remedies.

        Our leases of MOBs include both triple net leases where, in addition to paying fixed rents, the tenants assume the obligation to operate and maintain the properties at their expense, and net and modified gross leases where we are responsible to operate and maintain the properties and we charge tenants for some or all of the property operating costs. A small percentage of our MOB leases are so-called "full-service" leases where we receive fixed rent from our tenants and no reimbursement for our property operating costs.

        The existence of these lease terms does not guarantee that our tenants will honor their obligations to us.

Investment Policies.

        Acquisitions.     Our present investment goals are to acquire additional properties primarily for income and secondarily for appreciation potential. In implementing this acquisition strategy, we consider a range of factors relating to each proposed acquisition, including:

•

use and size of the property;



•

proposed acquisition price;



•

proposed lease terms;



•

availability and reputation of a financially qualified lessee(s) or guarantor(s);



•

historical and projected cash flows from the operations of the property;



•

estimated replacement cost of the property;



•

design, physical condition and age of the property;



•

competitive market environment of the property;



•

price segment and payment sources in which the property is operated; and



•

level of permitted services and regulatory history of the property and its historical operators.

6

Table of Contents

        We have no policies which specifically limit the percentage of our assets which may be invested in any individual property, in any one type of property, in properties leased to any one tenant or in properties leased to an affiliated group of tenants.

        Form of Investments.     We prefer wholly owned investments in fee interests. However, circumstances may arise in which we may invest in leaseholds, joint ventures, mortgages and other real estate interests. We may invest in real estate joint ventures if we conclude that by doing so we may benefit from the participation of co-venturers or that our opportunity to participate in the investment is contingent on the use of a joint venture structure. We may invest in participating, convertible or other types of mortgages if we conclude that by doing so, we may benefit from the cash flow or appreciation in the value of a property which is not available for purchase.

Mergers and Strategic Combinations.

        In the past, we have considered the possibility of entering mergers or strategic combinations with other companies and we may again explore such possibilities in the future.

Disposition Policies.

        From time to time we consider the sale of one or more properties or investments. Disposition decisions are made based on a number of factors including, but not limited to, the following:

•

our ability to lease the affected property;



•

our tenant's desire to purchase the affected property;



•

our tenant's desire to cease operating the affected property;



•

proposed sale price;



•

strategic fit of the property or investment with the rest of our portfolio; and



•

existence of alternative sources, uses or needs for capital.

Financing Policies.

        There are no limitations in our organizational documents on the amount of indebtedness we may incur. Our revolving credit facility and our senior note indenture and its supplements contain financial covenants which, among other things, restrict our ability to incur indebtedness and require us to maintain financial ratios and a minimum net worth. However, our Board of Trustees may seek to amend these covenants or seek replacement financings with less restrictive covenants. In the future, we may decide to seek changes in the financial covenants which currently restrict our debt leverage based upon then current economic conditions, the relative availability and costs of debt versus equity capital and our need for capital to take advantage of acquisition opportunities or otherwise.

        Our current revolving credit facility matures in December 2010, and, subject to certain conditions, we have an option to extend the facility an additional year by paying a fee. We continue to monitor market conditions for comparable revolving credit facilities, and our Board of Trustees has not made a decision to either pursue a new or amended revolving credit facility or exercise the one year extension period. Our Board of Trustees may also determine to seek additional capital through equity offerings, debt financings, retention of cash flows in excess of distributions to shareholders, or a combination of these methods. To the extent that our Board of Trustees decides to obtain additional debt financing, we may do so on an unsecured basis or a secured basis. We may seek to obtain lines of credit or to issue securities senior to our common shares, including preferred shares or debt securities, some of which may be convertible into common shares or be accompanied by warrants to purchase common shares. We may also finance acquisitions by assuming debt, through an exchange of properties or through the issuance of equity or other securities.

7

Table of Contents

Manager.

        Our day to day operations are conducted by RMR. RMR originates and presents investment and divestment opportunities to our Board of Trustees and provides management and administrative services to us. RMR is a Delaware limited liability company beneficially owned by Barry M. Portnoy and Adam D. Portnoy, our Managing Trustees. RMR has a principal place of business at 400 Centre Street, Newton Massachusetts, 02458, and its telephone number is (617) 332-3990. RMR also acts as the manager to Government Properties Income Trust, or GOV, (NYSE: GOV), HRPT Properties Trust, or HRP, (NYSE: HRP) and Hospitality Properties Trust, or HPT, (NYSE: HPT) and provides management services to other public and private companies, including Five Star and TravelCenters of America LLC, or TA, (NYSE Amex: TA). Barry M. Portnoy is the Chairman of RMR, and its other directors are Adam D. Portnoy, Gerard M. Martin, formerly one of our Managing Trustees, and David J. Hegarty, our President and Chief Operating Officer. The executive officers of RMR are: Adam D. Portnoy, President and Chief Executive Officer; Jennifer B. Clark, Executive Vice President and General Counsel; David J. Hegarty, Executive Vice President and Secretary; Mark L. Kleifges, Executive Vice President; John G. Murray, Executive Vice President; Thomas M. O'Brien, Executive Vice President; John C. Popeo, Executive Vice President, Treasurer and Chief Financial Officer; David M. Blackman, Senior Vice President; Ethan S. Bornstein, Senior Vice President; Richard A. Doyle, Senior Vice President; Paul Hoagland, Senior Vice President; David M. Lepore, Senior Vice President; Bruce J. Mackey, Jr., Senior Vice President; John A. Mannix, Senior Vice President; and Andrew J. Rebholz, Senior Vice President. David J. Hegarty and Richard A. Doyle are also our executive officers. Other executive officers of RMR also serve as officers of other companies to which RMR provides management services.

Employees.

        We have no employees. Services which would otherwise be provided by employees are provided by RMR and by our Managing Trustees and officers. As of February 19, 2010, RMR had approximately 600 full time employees, including a headquarters staff and regional offices and other personnel located throughout the United States.

Government Regulation and Reimbursement.

        The regulatory environment of the senior living and healthcare industries is extensive. Most of these laws and regulations affect the manner in which our tenants operate our properties, but these laws and regulations can also impact the values of our properties. Some of the laws that impact our tenants include: state and local licensure laws, laws protecting consumers against deceptive practices and laws generally affecting our tenants' operation of our properties and how our tenants otherwise conduct their operations, such as fire, health and safety laws and privacy laws; federal and state laws affecting assisted living communities that participate in Medicaid and skilled nursing facilities, hospitals, clinics and other healthcare facilities that participate in both Medicaid and Medicare, mandating allowable costs, pricing, reimbursement procedures and limitations, quality of services and care, food service and physical plants; resident rights (including abuse and neglect laws) and fraud laws; anti-kickback and physician referral laws; the Americans with Disabilities Act; and safety and health standards set by the federal Occupational Safety and Health Administration. Medicaid funding is available in some, but not all, states for assisted living services. State licensure standards for assisted living communities, skilled nursing facilities, hospitals, clinics and other healthcare facilities apply whether or not facilities accept Medicare or Medicaid funding, and typically cover facility policies, staffing, quality of services and care, resident rights, fire safety and physical plant, and related matters. We are unable to predict the future course of federal, state and local legislation or regulation. Changes in the regulatory framework could have a material adverse effect on the abilities of our tenants to pay our rents and the values of our properties.

8

Table of Contents

        Many senior living facilities are subject to regulation and licensing by state and local health and social service agencies or other regulatory authorities. Hospitals, clinics and other healthcare facilities are subject to regulations and licensing by state health authorities. In most states in which we own properties, our tenants are prohibited from providing certain levels of service without first obtaining the appropriate licenses. In addition, a certificate of need is required in most states before a skilled nursing facility or hospital can be opened or the services at an existing facility can be expanded. In some states, certificate of need requirements also apply to assisted living communities and some other healthcare facilities. Senior living facilities, hospitals and other healthcare facilities are also subject to state and local building, zoning, fire and food service codes and must be in compliance with applicable codes before licensing or Medicare/Medicaid certification may be granted. These laws and regulatory requirements could affect our ability to expand into new markets and our tenants' ability to expand their facilities in existing markets. In addition, if any of our tenants operate our property outside of the scope of their licensed authority, their doing so could subject them to penalties, including closure of the facility.

        Healthcare facilities like those that we own seem to be subject to increasing numbers of inspections or surveys and potential enforcement actions by governmental authorities. Unannounced surveys or inspections may occur annually or biannually, or following a state's receipt of a complaint about the facility. From time to time in the ordinary course of business, our tenants may receive deficiency reports from state regulatory bodies resulting from such inspections or surveys. Most inspection deficiencies are resolved through an agreed plan of corrective action relating to the affected facility's operations, but the governmental agency typically has the authority to take further action against a licensed or certified facility, which could result in the imposition of civil money penalties or fines, suspension, modification, or revocation of a license or Medicare/Medicaid participation, suspension or denial of admissions, partial or full denial of payments, state oversight, temporary management or imposition of other sanctions, including criminal penalties. Loss, suspension or modification of a license or certification or other sanctions or penalties could adversely affect the ability of a tenant to pay its rents. Our tenants may also expend considerable resources to respond to federal and state inspections, surveys, investigations, audits or other enforcement actions under applicable laws or regulations. Our tenants receive notices of potential sanctions and enforcement remedies from time to time, and such sanctions and penalties are imposed from time to time on our tenants. If any of our tenants were to fail to comply with any applicable legal requirements, or be unable to cure deficiencies that have been identified or are identified in the future, such sanctions may be imposed and if imposed, may adversely affect the affected tenants' abilities to pay their rents. State Attorneys General typically enforce consumer protection laws relating to senior living services, hospitals, clinics and other healthcare facilities. Also, state Medicaid fraud control agencies sometimes may investigate and prosecute assisted living communities and nursing facilities, hospitals, clinics and other healthcare facilities under fraud and patient abuse and neglect laws even if the facilities and their residents do not receive federal or state funds.

        Certain current state laws and regulations allow enforcement officials to make determinations as to whether the care provided by our tenants exceeds the level of care for which a particular facility is licensed. A finding that a facility is delivering care beyond the scope of its license might result in the immediate discharge and transfer of residents, which could adversely affect the ability of a tenant to pay rent to us. Furthermore, certain states and the federal government may allow citations in one facility to impact other facilities operated by the same entity or a related entity in the state or, in certain circumstances, in another state. Revocation of a license or certification at one facility could therefore impact a tenant's ability to obtain new licenses or certifications or to maintain or renew existing licenses at other facilities, which could adversely affect the ability of that tenant to pay rent to us. In addition, an adverse finding by survey officials may serve as the basis for lawsuits by private plaintiffs and may lead to investigations under federal and state laws, which could result in civil and/or criminal penalties against the facility or a related individual or entity.

9

Table of Contents

        Our medical office building and biotechnology laboratory tenants who provide healthcare services are subject to regulation by federal, state and local entities. Many states require medical clinics, ambulatory surgery centers, clinical laboratories and other outpatient healthcare facilities to be licensed and inspected for compliance with licensure regulations concerning professional staffing, services, patient rights and physical plant requirements, among other matters. Healthcare providers and suppliers, including physicians and other licensed medical practitioners, who receive federal or state reimbursement under Medicare, Medicaid or other federal or state programs must comply with the requirements for their participation in those programs and are subject to reimbursement rates that are increasingly subject to cost control pressures and may be reduced or may not be increased sufficiently to cover increasing provider costs, including our rents.

        Our biotechnology laboratory tenants who seek to develop, manufacture or market and distribute new drugs, biologicals or medical devices for human use are extensively regulated by the U.S. Food and Drug Administration, or the FDA, and other federal, state and local authorities. The FDA and such other agencies regulate the clinical development, testing, manufacture, quality control, safety, effectiveness, labeling, storage, record keeping, advertising and promotion of such products. Before a new pharmaceutical or device may be marketed and distributed in the United States, the FDA must approve it as safe and effective for human use. Preclinical and clinical studies and documentation are required, involving significant time, expense and risks of failure. The FDA or an institutional review board may suspend a clinical trial on various grounds, such as exposure of subjects or patients to an unacceptable health risk. If a product is ultimately approved for manufacturing, marketing and distribution, the FDA has continuing oversight authority and may require post-market testing and surveillance. Pharmaceutical and medical device manufacturing practices and facilities must comply with FDA requirements and facilities are subject to FDA inspection. Continuing regulatory concerns include the potential for later discovery of safety concerns and related litigation, whether the product qualifies for reimbursement under Medicare, Medicaid or other federal or state programs, cost control initiatives of such programs, the potential for litigation over the validity or infringement of intellectual property rights related to the product and eventual expiration of the product's patent. Failure to comply with regulatory requirements or with anti-fraud, false claims, anti-kickback or physician referral laws could result in withdrawal of FDA approval, recall of products, suspension of production, civil or criminal penalties or other governmental actions.

        Our tenants operate facilities in many states and participate in many federal and state health care payment programs, including state Medicaid waiver programs and state plans, for services in assisted living communities, the Medicare and Medicaid skilled nursing facility or hospital benefit programs, and other federal or state health care payment programs. Recent legislative and regulatory actions with respect to state Medicaid rates and federal Medicare rates are limiting the payment levels for certain services provided at these facilities. The recent recession and current difficult economic conditions are causing budget shortfalls in most states. Pursuant to the American Recovery and Reinvestment Act of 2009, adopted February 17, 2009, federal Medicaid payments to states have been temporarily increased from October 1, 2008, through December 31, 2010, with greater increases for states with more unemployment. However, most states project continuing fiscal deficits. Because of state budget deficits and cost containment measures, increasing state Medicaid enrollments as a result of the recent recession, and the current federal budget deficit and other federal priorities, we expect that Medicaid rate increases will be less than cost increases experienced by some of our tenants and that in some instances Medicaid rates may decline, and we are unable to estimate how recent or future Medicare rate changes will affect certain tenants. This combination of events may make it increasingly difficult for some of our tenants to pay rent to us.

        Medicare reimburses skilled nursing facilities under a prospective payment system, or the PPS, providing a fixed payment for each day of care provided to a Medicare beneficiary, in accordance with the Resource Utilization Group, or RUG, to which the beneficiary is assigned based on individual

10

Table of Contents

medical characteristics and service needs. The PPS payments cover substantially all Medicare Part A services the beneficiary receives. Capital costs are part of the PPS rate and are not facility specific. Many states have similar Medicaid prospective payment systems. Phased in over three years starting in 1998, the PPS was intended to reduce the rate of growth in Medicare payments by giving skilled nursing facilities incentives to furnish only necessary services, and to cause those services to be delivered efficiently. Between November 1999, and January 1, 2006, Congress provided some relief from the impact of the PPS through various temporary increases in payment rates and a temporary moratorium on some therapy limitations for residents covered under Medicare Part B. Effective January 1, 2006, the Federal Centers for Medicare and Medicaid Services, or CMS, revised the PPS RUG payment categories and rates, eliminating the temporary rate increases formerly in effect. For many nursing homes, the PPS revisions effectively eliminated rate increases of approximately 3% that had gone into effect in October 2005. In October 2006, and again in October 2007 and 2008, the Medicare PPS rates were increased by approximately 3%. Effective as of October 1, 2009, CMS has adopted rules recalibrating the Medicare prospective payment categories for SNFs for federal fiscal year 2010. CMS estimates that the recalibration will result in a decrease of approximately 3.3% in projected SNF payments, offset by an increase of approximately 2.2% to account for inflation in federal fiscal year 2010, and that as a result, aggregate Medicare payments to SNFs will be reduced by approximately 1.1% in federal fiscal year 2010.

        The federal government is also seeking to slow the growth of Medicare and Medicaid payments to skilled nursing facilities pursuant to the Deficit Reduction Act of 2005, or the DRA. The DRA reduced Medicare bad debt reimbursement from 100% to 70% for uncollected cost sharing payments from Medicare beneficiaries who are not eligible for Medicaid. In addition, the DRA increased the "look-back" period for prohibited asset transfers that disqualify individuals from receiving Medicaid nursing home benefits from three to five years. The period of Medicaid ineligibility now begins on the date of the prohibited transfer or the date the individual has entered the nursing home and would otherwise be eligible for Medicaid coverage, whichever occurs later, rather than on the date of the prohibited transfer, effectively extending the Medicaid penalty period. Also under the DRA, the limits on Medicare Part B payments for outpatient therapies, previously subject to a moratorium, went into effect subject to an exemption if Medicare found additional services to be medically necessary for an individual. The Medicare outpatient therapy exemption process was extended through the end of 2009, but expired on December 31, 2009. The expiration of the Medicare outpatient therapy cap exemption process may result in a reduction in some of Five Star's outpatient therapy revenues in 2010. Proposals to reinstate and extend the exemption process have been introduced in Congress, but we cannot predict whether the exemption process will be extended.

        The DRA also includes provisions that encourage states to provide long term care services in home and community based settings rather than in nursing homes or other inpatient facilities. In 2007, the Secretary of Health and Human Services awarded competitive grants for two or more years to a majority of states for demonstration projects to provide home and community based long term care services to individuals relocated from nursing homes, providing an increased federal Medicaid percentage payment for 12 months for each qualifying beneficiary. Also, effective as of January 1, 2007, states may include home and community based services as optional services under their Medicaid state plans. States must establish needs based criteria for the services, and more stringent needs based criteria for nursing home services. The states may cap enrollment, maintain waiting lists and offer the home and community based services in only some parts of a state, as Medicaid waivers allow. The Secretary of Health and Human Services will compare and assess outcomes and costs of long term care services provided at different types of sites.

        In 2004, CMS revised the Medicare standards that rehabilitation hospitals are required to meet in order to participate in the Medicare program as IRFs. The rule, known as the "75% rule", was amended in December 2007 by the SCHIP Extension Act, and is now generally known as the "60%

11

Table of Contents

rule". The rule now generally provides that, to be considered an IRF and receive reimbursement for services under the IRF PPS, at least 60% of a facility's total inpatient population must require intensive rehabilitation services associated with treatment of at least one of 13 designated medical conditions. In order to maintain their current levels of Medicare revenues, many rehabilitation hospitals have needed to reduce their numbers of non-qualifying patients and replace them with qualifying patients. Before it was amended in 2007, the rule was being phased in over a four year period that began on July 1, 2004. For cost reporting periods starting on and after July 1, 2006, 60% of a facility's inpatients must have required intensive rehabilitation services for one of the designated medical conditions. For cost reporting periods starting on and after July 1, 2007, and July 1, 2008, the required percentages were 65% and 75%, respectively. As a result of the 2007 retroactive amendment, the minimum requirement is now 60% for these and future cost reporting periods. If Five Star is unable to maintain compliance with this requirement at our rehabilitation hospitals, Medicare rates paid to Five Star at these hospitals could be materially adversely affected.

        For Medicare payments to IRFs on and after April 1, 2008, Medicare inflation related rate increases are frozen at zero percent for the Federal fiscal years ending September 30, 2008 and 2009, as required by the Medicare, Medicaid and SCHIP Extension Act of 2007. This freeze on increases reduced rates by 3.2% for discharges on and after April 1, 2008, effectively eliminating substantially all of an October 2007 rate increase of 3.5%. Also, on July 1, 2008, CMS issued a rule updating the Medicare IRF prospective rate formulas for the Federal fiscal year ending September 30, 2009. The rule recalculates the weights assigned to patient case mix groups that are used to calculate Medicare rates under the prospective payment system, and resets the outlier threshold to maintain estimated outlier payments at 3% of total estimated IRF payments for fiscal year 2009. CMS estimated that the change contained in the rule would result in a decrease of 0.7% to total Medicare payments to IRFs for Federal fiscal year 2009. Effective as of October 1, 2009, CMS has adopted rules that it estimates will increase aggregate Medicare payments to IRFs by approximately 2.5% in federal fiscal year 2010. CMS has set the outlier payments at 3% of total estimated IRF payments for the year. CMS has also adopted rules revising and clarifying the coverage criteria for Medicare patients in IRFs, effective as of January 1, 2010. These regulations include criteria for patient selection, treatment planning, coordination of care, and professional training and experience.

        The U.S. House of Representatives and Senate have each recently passed different comprehensive national healthcare reform bills that would, if adopted, dramatically change the country's healthcare system. We are unable to predict whether healthcare reform legislation will be adopted after negotiations between the House and Senate, the form of the legislation if adopted, or if adopted, the impact it will have on our tenants' business or financial conditions. The pending bills include healthcare insurance reforms, payment systems reforms and healthcare delivery systems reforms, with the goals of expanding access to health insurance coverage and reducing the growth of healthcare expenditures. Included in the bills or under consideration by Congress are mandates that most individuals purchase health insurance, tax credits to assist those with low incomes to acquire health insurance, expansion of Medicaid eligibility to more people, mandates that most employers pay part of the cost of health insurance for their employees, statewide insurance exchanges to expand access to health insurance, reducing or freezing Medicare and Medicaid provider payment rates including rates of SNFs and IRFs, and various pilot projects intended to reduce or slow the growth of healthcare costs. The pending legislation includes a pilot program under which acute care hospitals and post acute care providers such as SNFs and IRFs and rehabilitation clinics would receive a single bundled Medicare payment for acute hospital and post-acute care provided to a patient. The pending legislation also includes provisions for individuals to purchase government sponsored long term care insurance, which would entitle participating individuals after five or more years to receive insurance benefits for long term care services such as SNF or home health care services if needed in the future.

12

Table of Contents

        Our tenants who participate in Medicare, Medicaid and other federal or state health care reimbursement programs are subject to federal and state laws that prohibit anyone from presenting, or causing to be presented, claims for reimbursement that are false, fraudulent or are for items or services that were not provided as claimed. Fraud and false claims laws vary from state to state and these laws sometimes apply to providers who receive payment from private insurers or other sources and are not always interpreted consistently. Violation of any of these laws can result in loss of licensure, civil and criminal penalties and exclusion of health care providers or suppliers from federal and state health care payment programs. An adverse determination concerning any of our tenants' licenses or eligibility for Medicare or Medicaid reimbursement or the costs of sanctions, penalties and required compliance with applicable federal or state regulations could adversely affect these tenants' abilities to pay their rent to us.

        Our tenants are also subject to certain federal and state laws that regulate financial arrangements by health care providers relating to referrals, such as the federal Anti-Kickback Law, the federal physician referral laws known as the Stark Laws, and certain state referral laws and anti-kickback laws. The federal Anti-Kickback Law makes it unlawful for any person to offer or pay or to solicit or receive any remuneration, directly or indirectly, overtly or covertly, in cash or in kind to induce or in return for referring or recommending for purchase any item or service which is eligible for payment under the Medicare or Medicaid program or other federally funded programs. Authorities have interpreted this statute very broadly to apply to many practices and relationships between health care providers and sources of patient referral. If a tenant were to violate the federal Anti-Kickback Law, it could face criminal penalties and civil sanctions, including fines and possible exclusion from government programs such as Medicare and Medicaid, which could adversely affect its ability to pay its rents. While we require our tenants to comply with all laws that regulate the operation of our senior living properties, it is impossible to predict how our properties or tenants' ability to pay their rents could be affected if any of our tenants were subject to an action alleging such violations.

        Our tenants are also subject to federal and state laws designed to protect the confidentiality and security of patient health information. The U.S. Department of Health and Human Services has issued rules pursuant to the Health Insurance Portability and Accountability Act of 1996, or HIPAA, that govern our tenants' use and disclosure of health information at certain HIPAA covered facilities. The costs to comply with these rules may adversely affect the abilities of our tenants to pay their rent to us.

        If any of our tenants becomes unable to operate our properties or to pay our rents because it has violated government regulations or payment laws, we may have great difficulty finding a substitute tenant or selling the leased property for a fair price and the value of an affected property may decline materially.

Competition.

        Investing in senior living facilities, wellness centers, MOBs and other real estate is a very competitive business. We compete against other REITs, numerous financial institutions, individuals and public and private companies who are actively engaged in this business. Also, we compete for investments based on a number of factors including rates, financings offered, underwriting criteria and reputation. Our ability to successfully compete is also impacted by economic and population trends, availability of acceptable investment opportunities, our ability to negotiate beneficial investment terms, availability and cost of capital and new and existing laws and regulations. We do not believe we have a dominant position in any of the geographic or property markets in which we operate, but some of our competitors are dominant in selected markets. Many of our competitors have greater financial and other resources than we have. We believe the geographic diversity of our investments, the experience and abilities of our management, our affiliation with RMR, the quality of our assets and the financial strength of many of our tenants affords us some competitive advantages which have and will allow us to operate our business successfully despite the competitive nature of our business.

13

Table of Contents

        The tenants that operate our healthcare facilities compete on a local and regional basis with operators of facilities that provide comparable services. Operators compete for residents and patients based on quality of care, reputation, physical appearance of properties, services offered, family preferences, physicians, staff, price and location. We and our tenants also face competition from other healthcare facilities for tenants, such as physicians and other healthcare providers that provide comparable facilities and services.

        For additional information on competition and the risks associated with our business, please see Item 1A, "Risk Factors" of this Annual Report on Form 10-K.

Environmental and Climate Change Matters.

        Under various laws, owners as well as tenants and operators of real estate may be required to investigate and clean up or remove hazardous substances present at or migrating from properties they own, lease or operate and may be held liable for property damage or personal injuries that result from hazardous substances. These laws also expose us to the possibility that we may become liable to reimburse governments for damages and costs they incur in connection with hazardous substances. We reviewed environmental conditions surveys of the properties we own prior to their purchase. Based upon those surveys we do not believe that there are environmental conditions at any of our properties that have had or will have a material adverse effect on us. However, no assurances can be given that conditions are not present at our properties or that costs we may be required to incur in the future to remediate contamination will not have a material adverse effect on our business or financial condition.

        The current political debate about climate change has resulted in various treaties, laws and regulations which are intended to limit carbon emissions. We believe these laws being enacted or proposed may cause energy costs at our properties to increase, but we do not expect the direct impact of these increases to be material to our results of operations, because the increased costs either would be the responsibility of our tenants directly or in large part may be passed through by us to our tenants as additional lease payments. Although we do not believe it is likely in the foreseeable future, laws enacted to mitigate climate change may make some of our buildings obsolete or cause us to make material investments in our properties which could materially and adversely affect our financial condition.

Internet Website.

        Our internet website address is www.snhreit.com. Copies of our governance guidelines, or Governance Guidelines, code of business conduct and ethics, or Code of Conduct, and the charters of our audit, compensation and nominating and governance committees are posted on our website and may be obtained free of charge by writing to our Secretary, Senior Housing Properties Trust, 400 Centre Street, Newton, Massachusetts, 02458 or by visiting our website. We make available, free of charge, on our website, our Annual Reports on Form 10-K, our Quarterly Reports on Form 10-Q, our Current Reports on Form 8-K and amendments to these reports filed or furnished pursuant to Section 13(a) or 15(d) of the Securities Exchange Act of 1934, as amended, or the Exchange Act, as soon as reasonably practicable after these forms are filed with, or furnished to, the Securities and Exchange Commission, or SEC. Any shareholder or other interested party who desires to communicate with our Independent Trustees, individually or as a group, may do so by filling out a report on our website. Our Board of Trustees also provides a process for security holders to send communications to the entire Board of Trustees. Information about the process for sending communications to our Board of Trustees can be found on our website. Our website address is included several times in this Annual Report on Form 10-K as a textual reference only and none of the information on our website is incorporated by reference into this Annual Report on Form 10-K.

14

Table of Contents

Segment Reporting.

        As of December 31, 2009, we have three operating segments. The first operating segment provides short term and long term residential care facilities that offer dining for residents. Properties in this segment include independent living communities, assisted living communities, skilled nursing facilities and rehabilitation hospitals. The second operating segment provides medical related services where residential overnight stays or dining services are not provided. Properties in this segment include our MOBs. The third operating segment provides specialized facilities that offer fitness, wellness and spa services to members. See our consolidated financial statements included in "Item 15. Exhibits and Financial Statement Schedules" of this Annual Report on Form 10-K for further financial information on our operating segments.

FEDERAL INCOME TAX CONSIDERATIONS

        The following summary of federal income tax considerations is based on existing law, and is limited to investors who own our shares as investment assets rather than as inventory or as property used in a trade or business. The summary does not discuss all of the particular tax consequences that might be relevant to you if you are subject to special rules under federal income tax law, for example if you are:

•

a bank, life insurance company, regulated investment company, or other financial institution;



•

a broker, dealer or trader in securities or foreign currency;



•

a person who has a functional currency other than the U.S. dollar;



•

a person who acquires our shares in connection with employment or other performance of services;



•

a person subject to alternative minimum tax;



•

a person who owns our shares as part of a straddle, hedging transaction, constructive sale transaction, constructive ownership transaction, or conversion transaction; or



•

except as specifically described in the following summary, a tax-exempt entity or a foreign person.

        The Internal Revenue Code of 1986, as amended, or the IRC, sections that govern federal income tax qualification and treatment of a REIT and its shareholders are complex. This presentation is a summary of applicable IRC provisions, related rules and regulations and administrative and judicial interpretations, all of which are subject to change, possibly with retroactive effect. Future legislative, judicial, or administrative actions or decisions could also affect the accuracy of statements made in this summary. We have not received a ruling from the Internal Revenue Service, or the IRS, with respect to any matter described in this summary, and we cannot assure you that the IRS or a court will agree with the statements made in this summary. The IRS or a court could, for example, take a different position from that described in this summary with respect to our acquisitions, operations, restructurings or other matters, which, if successful, could result in significant tax liabilities for applicable parties. In addition, this summary is not exhaustive of all possible tax consequences, and does not discuss any estate, gift, state, local, or foreign tax consequences. For all these reasons, we urge you and any prospective acquiror of our shares to consult with a tax advisor about the federal income tax and other tax consequences of the acquisition, ownership and disposition of our shares. Our intentions and beliefs described in this summary are based upon our understanding of applicable laws and regulations that are in effect as of the date of this Annual Report on Form 10-K. If new laws or regulations are enacted which impact us directly or indirectly, we may change our intentions or beliefs.

15

Table of Contents

        Your federal income tax consequences may differ depending on whether or not you are a "U.S. shareholder." For purposes of this summary, a "U.S. shareholder" for federal income tax purposes is:

•

a citizen or resident of the United States, including an alien individual who is a lawful permanent resident of the United States or meets the substantial presence residency test under the federal income tax laws;



•

an entity treated as a corporation for federal income tax purposes, that is created or organized in or under the laws of the United States, any state thereof or the District of Columbia;



•

an estate the income of which is subject to federal income taxation regardless of its source; or



•

a trust if a court within the United States is able to exercise primary supervision over the administration of the trust and one or more United States persons have the authority to control all substantial decisions of the trust, or an electing trust in existence on August 20, 1996, to the extent provided in Treasury regulations;

whose status as a U.S. shareholder is not overridden by an applicable tax treaty. Conversely, a "non-U.S. shareholder" is a beneficial owner of our shares who is not a U.S. shareholder. If a partnership (including any entity treated as a partnership for federal income tax purposes) is a beneficial owner of our shares, the tax treatment of a partner in the partnership generally will depend upon the status of the partner and the activities of the partnership. A beneficial owner that is a partnership and partners in such a partnership should consult their tax advisors about the federal income tax consequences of the acquisition, ownership and disposition of our shares.

Taxation as a REIT

        We have elected to be taxed as a REIT under Sections 856 through 860 of the IRC, commencing with our taxable year ending December 31, 1999. Our REIT election, assuming continuing compliance with the then applicable qualification tests, continues in effect for subsequent taxable years. Although no assurance can be given, we believe that we have been organized and have operated, and will continue to be organized and to operate, in a manner that qualified and will continue to qualify us to be taxed under the IRC as a REIT.

        As a REIT, we generally are not subject to federal income tax on our net income distributed as dividends to our shareholders. Distributions to our shareholders generally are included in their income as dividends to the extent of our current or accumulated earnings and profits. Our dividends are not generally entitled to the favorable 15% rate on qualified dividend income (scheduled to increase to ordinary income rates for taxable years beginning after December 31, 2010), but a portion of our dividends may be treated as capital gain dividends, all as explained below. No portion of any of our dividends is eligible for the dividends received deduction for corporate shareholders. Distributions in excess of current or accumulated earnings and profits generally are treated for federal income tax purposes as return of capital to the extent of a recipient shareholder's basis in our shares, and will reduce this basis. Our current or accumulated earnings and profits are generally allocated first to distributions made on our preferred shares, if any, and thereafter to distributions made on our common shares. For all these purposes, our distributions include both cash distributions and any in kind distributions of property that we might make.

        Our counsel, Sullivan & Worcester LLP, has opined that we have been organized and have qualified as a REIT under the IRC for our 1999 through 2009 taxable years, and that our current investments and plan of operation enable us to continue to meet the requirements for qualification and taxation as a REIT under the IRC. Our continued qualification and taxation as a REIT will depend upon our compliance with various qualification tests imposed under the IRC and summarized below. While we believe that we will satisfy these tests, our counsel does not review compliance with these tests on a continuing basis. If we fail to qualify as a REIT, we will be subject to federal income taxation

16

Table of Contents

as if we were a C corporation and our shareholders will be taxed like shareholders of C corporations. In this event, we could be subject to significant tax liabilities, and the amount of cash available for distribution to our shareholders may be reduced or eliminated.

        If we qualify as a REIT and meet the tests described below, we generally will not pay federal income tax on amounts we distribute to our shareholders. However, even if we qualify as a REIT, we may be subject to federal tax in the following circumstances:

•

We will be taxed at regular corporate rates on any undistributed "real estate investment trust taxable income," including our undistributed net capital gains.



•

If our alternative minimum taxable income exceeds our taxable income, we may be subject to the corporate alternative minimum tax on our items of tax preference.



•

If we have net income from the disposition of "foreclosure property" that is held primarily for sale to customers in the ordinary course of business or from other nonqualifying income from foreclosure property, we will be subject to tax on this income at the highest regular corporate rate, currently 35%.



•

If we have net income from prohibited transactions, including dispositions of inventory or property held primarily for sale to customers in the ordinary course of business other than foreclosure property, we will be subject to tax on this income at a 100% rate.



•

If we fail to satisfy the 75% gross income test or the 95% gross income test discussed below, but nonetheless maintain our qualification as a REIT, we will be subject to tax at a 100% rate on the greater of the amount by which we fail the 75% or the 95% test, with adjustments, multiplied by a fraction intended to reflect our profitability.



•

If we fail to distribute for any calendar year at least the sum of 85% of our REIT ordinary income for that year, 95% of our REIT capital gain net income for that year, and any undistributed taxable income from prior periods, we will be subject to a 4% nondeductible excise tax on the excess of the required distribution over the amounts actually distributed.



•

If we acquire an asset from a corporation in a transaction in which our basis in the asset is determined by reference to the basis of the asset in the hands of a present or former C corporation, and if we subsequently recognize gain on the disposition of this asset during the ten year period beginning on the date on which the asset ceased to be owned by the C corporation, then we will pay tax at the highest regular corporate tax rate, which is currently 35%, on the lesser of the excess of the fair market value of the asset over the C corporation's basis in the asset on the date the asset ceased to be owned by the C corporation, or the gain we recognize in the disposition.



•

If we acquire a corporation, to preserve our status as a REIT we must generally distribute all of the C corporation earnings and profits inherited in that acquisition, if any, not later than the end of the taxable year of the acquisition. However, if we fail to do so, relief provisions would allow us to maintain our status as a REIT provided we distribute any subsequently discovered C corporation earnings and profits and pay an interest charge in respect of the period of delayed distribution. As discussed below, we have acquired C corporations in connection with our acquisition of real estate. Our investigations of these C corporations indicated that they did not have undistributed earnings and profits that we inherited but failed to timely distribute. However, upon review or audit, the IRS may disagree.



•

As summarized below, REITs are permitted within limits to own stock and securities of a "taxable REIT subsidiary." A taxable REIT subsidiary is separately taxed on its net income as a C corporation, and is subject to limitations on the deductibility of interest expense paid to its

17

Table of Contents

REIT parent. In addition, its REIT parent is subject to a 100% tax on the difference between amounts charged and redetermined rents and deductions, including excess interest.

•

If and to the extent we invest in properties in foreign jurisdictions, our income from those properties will generally be subject to tax in those jurisdictions. If we continue to operate as we do, then we will distribute our taxable income to our shareholders each year and we will generally not pay federal income tax. As a result, we cannot recover the cost of foreign income taxes imposed on our foreign investments by claiming foreign tax credits against our federal income tax liability. Also, we cannot pass through to our shareholders any foreign tax credits.

        If we fail to qualify or elect not to qualify as a REIT, we will be subject to federal income tax in the same manner as a C corporation. Distributions to our shareholders if we do not qualify as a REIT will not be deductible by us nor will distributions be required under the IRC. In that event, distributions to our shareholders will generally be taxable as ordinary dividends potentially eligible for the 15% income tax rate (scheduled to increase to ordinary income rates for taxable years beginning after December 31, 2010) discussed below in "Taxation of U.S. Shareholders" and, subject to limitations in the IRC, will be eligible for the dividends received deduction for corporate shareholders. Also, we will generally be disqualified from qualification as a REIT for the four taxable years following disqualification. If we do not qualify as a REIT for even one year, this could result in reduction or elimination of distributions to our shareholders, or in our incurring substantial indebtedness or liquidating substantial investments in order to pay the resulting corporate-level taxes. The IRC provides certain relief provisions under which we might avoid automatically ceasing to be a REIT for failure to meet certain REIT requirements, all as discussed in more detail below.

REIT Qualification Requirements

        General Requirements.     Section 856(a) of the IRC defines a REIT as a corporation, trust or association:

(1)

that is managed by one or more trustees or directors;



(2)

the beneficial ownership of which is evidenced by transferable shares or by transferable certificates of beneficial interest;



(3)

that would be taxable, but for Sections 856 through 859 of the IRC, as a C corporation;



(4)

that is not a financial institution or an insurance company subject to special provisions of the IRC;



(5)

the beneficial ownership of which is held by 100 or more persons;



(6)

that is not "closely held" as defined under the personal holding company stock ownership test, as described below; and



(7)

that meets other tests regarding income, assets and distributions, all as described below.

Section 856(b) of the IRC provides that conditions (1) through (4) must be met during the entire taxable year and that condition (5) must be met during at least 335 days of a taxable year of 12 months, or during a pro rata part of a taxable year of less than 12 months. Section 856(h)(2) of the IRC provides that neither condition (5) nor (6) need be met for our first taxable year as a REIT. We believe that we have met conditions (1) through (7) during each of the requisite periods ending on or before our most recently completed taxable year, and that we can continue to meet these conditions in future taxable years. There can, however, be no assurance in this regard.

        By reason of condition (6), we will fail to qualify as a REIT for a taxable year if at any time during the last half of a year more than 50% in value of our outstanding shares is owned directly or indirectly by five or fewer individuals. To help comply with condition (6), our declaration of trust

18

Table of Contents

restricts transfers of our shares. In addition, if we comply with applicable Treasury regulations to ascertain the ownership of our shares and do not know, or by exercising reasonable diligence would not have known, that we failed condition (6), then we will be treated as having met condition (6). However, our failure to comply with these regulations for ascertaining ownership may result in a penalty of $25,000, or $50,000 for intentional violations. Accordingly, we have complied and will continue to comply with these regulations, including requesting annually from record holders of significant percentages of our shares information regarding the ownership of our shares. Under our declaration of trust, our shareholders are required to respond to these requests for information.

        For purposes of condition (6), the term "individuals" is defined in the IRC to include natural persons, supplemental unemployment compensation benefit plans, private foundations and portions of a trust permanently set aside or used exclusively for charitable purposes, but not other entities or qualified pension plans or profit-sharing trusts. As a result, REIT shares owned by an entity that is not an "individual" are considered to be owned by the direct and indirect owners of the entity that are individuals (as so defined), rather than to be owned by the entity itself. Similarly, REIT shares held by a qualified pension plan or profit-sharing trust are treated as held directly by the beneficiaries in proportion to their actuarial interests in such plan or trust. Consequently, five or fewer such trusts could own more than 50% of the interests in an entity without jeopardizing that entity's federal income tax qualification as a REIT. However, as discussed below, if a REIT is a "pension-held REIT," each qualified pension plan or profit-sharing pension trust owning more than 10% of the REIT's shares by value generally may be taxed on a portion of the dividends it receives from the REIT.

        The IRC provides that we will not automatically fail to be a REIT if we do not meet conditions (1) through (6), provided we can establish reasonable cause for any such failure. Each such excused failure will result in the imposition of a $50,000 penalty instead of REIT disqualification. It is impossible to state whether in all circumstances we would be entitled to the benefit of this relief provision. This relief provision applies to any failure of the applicable conditions, even if the failure first occurred in a prior taxable year.

        Our Wholly-Owned Subsidiaries and Our Investments through Partnerships.     Except in respect of taxable REIT subsidiaries as discussed below, Section 856(i) of the IRC provides that any corporation, 100% of whose stock is held by a REIT, is a qualified REIT subsidiary and shall not be treated as a separate corporation. The assets, liabilities and items of income, deduction and credit of a qualified REIT subsidiary are treated as the REIT's. We believe that each of our direct and indirect wholly-owned subsidiaries, other than the taxable REIT subsidiaries discussed below, will be either a qualified REIT subsidiary within the meaning of Section 856(i) of the IRC, or a noncorporate entity that for federal income tax purposes is not treated as separate from its owner under regulations issued under Section 7701 of the IRC. Thus, except for the taxable REIT subsidiaries discussed below, in applying all the federal income tax REIT qualification requirements described in this summary, all assets, liabilities and items of income, deduction and credit of our direct and indirect wholly-owned subsidiaries are treated as ours.

        We may invest in real estate through one or more limited or general partnerships or limited liability companies that are treated as partnerships for federal income tax purposes. In the case of a REIT that is a partner in a partnership, regulations under the IRC provide that, for purposes of the REIT qualification requirements regarding income and assets discussed below, the REIT is deemed to own its proportionate share of the assets of the partnership corresponding to the REIT's proportionate capital interest in the partnership and is deemed to be entitled to the income of the partnership attributable to this proportionate share. In addition, for these purposes, the character of the assets and gross income of the partnership generally retain the same character in the hands of the REIT. Our proportionate share of the assets, liabilities, and items of income of each partnership in which we become a partner is treated as ours for purposes of the income tests and asset tests discussed below. In contrast, for purposes of the distribution requirement discussed below, we would take into account as a

19

Table of Contents

partner our share of the partnership's income as determined under the general federal income tax rules governing partners and partnerships under Sections 701 through 777 of the IRC.

        Taxable REIT Subsidiaries.     We are permitted to own any or all of the securities of a "taxable REIT subsidiary" as defined in Section 856(l) of the IRC, provided that no more than 25% of our assets, at the close of each quarter, is comprised of our investments in the stock or securities of our taxable REIT subsidiaries. (For our 2001 through 2008 taxable years, no more than 20% of our assets, at the close of each quarter, was permitted to be comprised of our investments in the stock or securities of our taxable REIT subsidiaries; before the introduction of taxable REIT subsidiaries in 2001, our ability to own separately taxable corporate subsidiaries was more limited.) Among other requirements, a taxable REIT subsidiary must:

(1)

be a non-REIT corporation for federal income tax purposes in which we directly or indirectly own shares;



(2)

join with us in making a taxable REIT subsidiary election;



(3)

not directly or indirectly operate or manage a lodging facility or a health care facility; and



(4)

not directly or indirectly provide to any person, under a franchise, license, or otherwise, rights to any brand name under which any lodging facility or health care facility is operated, except that in limited circumstances a subfranchise, sublicense or similar right can be granted to an independent contractor to operate or manage a lodging facility or, after our 2008 taxable year, a health care facility.

        In addition, a corporation other than a REIT in which a taxable REIT subsidiary directly or indirectly owns more than 35% of the voting power or value will automatically be treated as a taxable REIT subsidiary. Subject to the discussion below, we believe that we and each of our taxable REIT subsidiaries have complied with, and will continue to comply with, the requirements for taxable REIT subsidiary status at all times during which we intend for the subsidiary's taxable REIT subsidiary election to be in effect, and we believe that the same will be true for any taxable REIT subsidiary that we later form or acquire.

        Our ownership of stock and securities in taxable REIT subsidiaries is exempt from the 10% and 5% REIT asset tests discussed below. Also, as discussed below, taxable REIT subsidiaries can perform services for our tenants without disqualifying the rents we receive from those tenants under the 75% or 95% gross income tests discussed below. Moreover, because taxable REIT subsidiaries are taxed as C corporations that are separate from us, their assets, liabilities and items of income, deduction and credit generally are not imputed to us for purposes of the REIT qualification requirements described in this summary. Therefore, taxable REIT subsidiaries can generally undertake third-party management and development activities and activities not related to real estate. Finally, while a REIT is generally limited in its ability to earn qualifying rental income from a taxable REIT subsidiary, a REIT can earn qualifying rental income from the lease of a qualified health care property to a taxable REIT subsidiary for taxable years beginning after July 30, 2008 if an eligible independent contractor operates the facility, as discussed more fully below.

        Restrictions are imposed on taxable REIT subsidiaries to ensure that they will be subject to an appropriate level of federal income taxation. For example, a taxable REIT subsidiary may not deduct interest paid in any year to an affiliated REIT to the extent that the interest payments exceed, generally, 50% of the taxable REIT subsidiary's adjusted taxable income for that year. However, the taxable REIT subsidiary may carry forward the disallowed interest expense to a succeeding year, and deduct the interest in that later year subject to that year's 50% adjusted taxable income limitation. In addition, if a taxable REIT subsidiary pays interest, rent, or other amounts to its affiliated REIT in an amount that exceeds what an unrelated third party would have paid in an arm's length transaction, then the REIT generally will be subject to an excise tax equal to 100% of the excessive portion of the

20

Table of Contents

payment. Finally, if in comparison to an arm's length transaction, a tenant has overpaid rent to the REIT in exchange for underpaying the taxable REIT subsidiary for services rendered, then the REIT may be subject to an excise tax equal to 100% of the overpayment. There can be no assurance that arrangements involving our taxable REIT subsidiaries will not result in the imposition of one or more of these deduction limitations or excise taxes, but we do not believe that we are or will be subject to these impositions.

        Income Tests.     There are two gross income requirements for qualification as a REIT under the IRC:

•

At least 75% of our gross income (excluding: (a) gross income from sales or other dispositions of property held primarily for sale; (b) any income arising from "clearly identified" hedging transactions that we enter into after July 30, 2008 to manage interest rate or price fluctuations with respect to borrowings we incur to acquire or carry real estate assets; (c) any income arising from "clearly identified" hedging transactions that we enter into after July 30, 2008 primarily to manage risk of currency fluctuations relating to any item that qualifies under the 75% or 95% gross income tests; (d) real estate foreign exchange gain (as defined in Section 856(n)(2) of the IRC) that we recognize after July 30, 2008; and (e) income from the repurchase or discharge of indebtedness) must be derived from investments relating to real property, including "rents from real property" as defined under Section 856 of the IRC, interest and gain from mortgages on real property, income and gain from foreclosure property, or dividends and gain from shares in other REITs. When we receive new capital in exchange for our shares or in a public offering of five-year or longer debt instruments, income attributable to the temporary investment of this new capital in stock or a debt instrument, if received or accrued within one year of our receipt of the new capital, is generally also qualifying income under the 75% gross income test.



•

At least 95% of our gross income (excluding: (a) gross income from sales or other dispositions of property held primarily for sale; (b) any income arising from "clearly identified" hedging transactions that we enter into after December 31, 2004 to manage interest rate or price fluctuations with respect to borrowings we incur to acquire or carry real estate assets; (c) any income arising from "clearly identified" hedging transactions that we enter into after July 30, 2008 primarily to manage risk of currency fluctuations relating to any item that qualifies under the 75% or 95% gross income tests; (d) passive foreign exchange gain (as defined in Section 856(n)(3) of the IRC) that we recognize after July 30, 2008; and (e) income from the repurchase or discharge of indebtedness) must be derived from a combination of items of real property income that satisfy the 75% gross income test described above, dividends, interest, gains from the sale or disposition of stock, securities, or real property or, for financial instruments entered into during our 2004 or earlier taxable years, certain payments under interest rate swap or cap agreements, options, futures contracts, forward rate agreements or similar financial instruments.

For purposes of the 75% and 95% gross income tests outlined above, income derived from a "shared appreciation provision" in a mortgage loan is generally treated as gain recognized on the sale of the property to which it relates. Although we will use our best efforts to ensure that the income generated by our investments will be of a type that satisfies both the 75% and 95% gross income tests, there can be no assurance in this regard.

        In order to qualify as "rents from real property" under Section 856 of the IRC, several requirements must be met:

•

The amount of rent received generally must not be based on the income or profits of any person, but may be based on receipts or sales.

21

Table of Contents

•

Rents do not qualify if the REIT owns 10% or more by vote or value of the tenant, whether directly or after application of attribution rules. While we intend not to lease property to any party if rents from that property would not qualify as rents from real property, application of the 10% ownership rule is dependent upon complex attribution rules and circumstances that may be beyond our control. For example, an unaffiliated third party's ownership directly or by attribution of 10% or more by value of our shares, as well as an ownership position in the stock of one of our tenants which, when added to our own ownership position in that tenant, totals 10% or more by vote or value of the stock of that tenant, would result in that tenant's rents not qualifying as rents from real property; in this regard, we already own close to, but less than, 10% of the outstanding common shares of Five Star, and Five Star has undertaken to limit its redemptions of outstanding common shares so that we do not come to own 10% or more of its outstanding common shares. Our declaration of trust disallows transfers or purported acquisitions, directly or by attribution, of our shares to the extent necessary to maintain our REIT status under the IRC. Nevertheless, there can be no assurance that these provisions in our declaration of trust will be effective to prevent our REIT status from being jeopardized under the 10% affiliated tenant rule. Furthermore, there can be no assurance that we will be able to monitor and enforce these restrictions, nor will our shareholders necessarily be aware of ownership of shares attributed to them under the IRC's attribution rules.



•

There is a limited exception to the above prohibition on earning "rents from real property" from a 10% affiliated tenant, if the tenant is a taxable REIT subsidiary. If at least 90% of the leased space of a property is leased to tenants other than taxable REIT subsidiaries and 10% affiliated tenants, and if the taxable REIT subsidiary's rent for space at that property is substantially comparable to the rents paid by nonaffiliated tenants for comparable space at the property, then otherwise qualifying rents paid by the taxable REIT subsidiary to the REIT will not be disqualified on account of the rule prohibiting 10% affiliated tenants.



•

Commencing with our 2009 taxable year, there is an additional exception to the above prohibition on earning "rents from real property" from a 10% affiliated tenant. For this additional exception to apply, a real property interest in a "qualified health care property" must be leased by the REIT to its taxable REIT subsidiary, and the facility must be operated on behalf of the taxable REIT subsidiary by a person who is an "eligible independent contractor," all as described in Sections 856(d)(8)-(9) and 856(e)(6)(D) of the IRC.



•

In order for rents to qualify, we generally must not manage the property or furnish or render services to the tenants of the property, except through an independent contractor from whom we derive no income or through one of our taxable REIT subsidiaries. There is an exception to this rule permitting a REIT to perform customary tenant services of the sort that a tax-exempt organization could perform without being considered in receipt of "unrelated business taxable income" as defined in Section 512(b)(3) of the IRC. In addition, a de minimis amount of noncustomary services will not disqualify income as "rents from real property" so long as the value of the impermissible services does not exceed 1% of the gross income from the property.



•

If rent attributable to personal property leased in connection with a lease of real property is 15% or less of the total rent received under the lease, then the rent attributable to personal property will qualify as "rents from real property"; if this 15% threshold is exceeded, the rent attributable to personal property will not so qualify. The portion of rental income treated as attributable to personal property is determined according to the ratio of the fair market value of the personal property to the total fair market value of the real and personal property that is rented.

We believe that all or substantially all our rents have qualified and will qualify as rents from real property for purposes of Section 856 of the IRC.

22

Table of Contents

        In order to qualify as mortgage interest on real property for purposes of the 75% test, interest must derive from a mortgage loan secured by real property with a fair market value, at the time the loan is made, at least equal to the amount of the loan. If the amount of the loan exceeds the fair market value of the real property, the interest will be treated as interest on a mortgage loan in a ratio equal to the ratio of the fair market value of the real property to the total amount of the mortgage loan.

        Absent the "foreclosure property" rules of Section 856(e) of the IRC, a REIT's receipt of business operating income from a property would not qualify under the 75% and 95% gross income tests. But as foreclosure property, gross income from such a business operation would so qualify. In the case of property leased by a REIT to a tenant, foreclosure property is defined under applicable Treasury regulations to include generally the real property and incidental personal property that the REIT reduces to possession upon a default or imminent default under the lease by the tenant, and as to which a foreclosure property election is made by attaching an appropriate statement to the REIT's federal income tax return.

        Any gain that a REIT recognizes on the sale of foreclosure property, plus any income it receives from foreclosure property that would not qualify under the 75% gross income test in the absence of foreclosure property treatment, reduced by expenses directly connected with the production of those items of income, would be subject to income tax at the maximum corporate rate, currently 35%, under the foreclosure property income tax rules of Section 857(b)(4) of the IRC. Thus, if a REIT should lease foreclosure property in exchange for rent that qualifies as "rents from real property" as described above, then that rental income is not subject to the foreclosure property income tax. As discussed below, these foreclosure property rules did not apply to the two hospitals that were the subject of our dispute with HealthSouth Corporation, or HealthSouth.

        From the inception of our dispute through the end of both our 2004 and 2005 taxable years, HealthSouth remained in possession of the two hospitals and only paid us amounts that were in the nature of "rents from real property". We attached a statement to both our 2004 and 2005 federal income tax returns that summarized our dispute with HealthSouth and expressed our intent that a foreclosure property election apply to the two subject hospitals when and if appropriate. But because the only amounts we received from HealthSouth through the end of our 2004 and 2005 taxable years were in the nature of "rents from real property", we believe that our 2004 and 2005 income from the two hospitals was qualifying income for purposes of the 75% and 95% gross income tests, and that no foreclosure property income tax was owed on such amounts.

        In 2006 we settled our litigation with HealthSouth by reinstating our lease with them through September 30, 2006 in exchange for a fixed rental sum. Again, because the only amounts we received from HealthSouth in 2006 were in the nature of "rents from real property", we believe that our 2006 income from the two hospitals was qualifying income for purposes of the 75% and 95% gross income tests, and that no foreclosure property income tax was owed on such amounts. Effective October 1, 2006, we leased these two hospitals to Five Star with the intent that the rental income under this new lease be "rents from real property" that qualify for purposes of the 75% and 95% gross income tests.

        Other than sales of foreclosure property, any gain we realize on the sale of property held as inventory or other property held primarily for sale to customers in the ordinary course of business will be treated as income from a prohibited transaction that is subject to a penalty tax at a 100% rate. This prohibited transaction income also may adversely affect our ability to satisfy the 75% and 95% gross income tests for federal income tax qualification as a REIT. We cannot provide assurances as to whether or not the IRS might successfully assert that one or more of our dispositions is subject to the

23

Table of Contents

100% penalty tax. However, we believe that dispositions of assets that we have made or that we might make in the future will not be subject to the 100% penalty tax, because we intend to:

•

own our assets for investment with a view to long-term income production and capital appreciation;



•

engage in the business of developing, owning and managing our existing properties and acquiring, developing, owning and managing new properties; and



•

make occasional dispositions of our assets consistent with our long-term investment objectives.

        If we fail to satisfy one or both of the 75% or the 95% gross income tests in any taxable year, we may nevertheless qualify as a REIT for that year if we satisfy the following requirements:

•

our failure to meet the test is due to reasonable cause and not due to willful neglect, and



•

after we identify the failure, we file a schedule describing each item of our gross income included in the 75% or 95% gross income tests for that taxable year.

It is impossible to state whether in all circumstances we would be entitled to the benefit of this relief provision for the 75% and 95% gross income tests. Even if this relief provision does apply, a 100% tax is imposed upon the greater of the amount by which we failed the 75% test or the 95% test, with adjustments, multiplied by a fraction intended to reflect our profitability. This relief provision applies to any failure of the applicable income tests, even if the failure first occurred in a prior taxable year.

        Asset Tests.     At the close of each quarter of each taxable year, we must also satisfy the following asset percentage tests in order to qualify as a REIT for federal income tax purposes:

•

At least 75% of our total assets must consist of real estate assets, cash and cash items, shares in other REITs, government securities, and temporary investments of new capital (that is, stock or debt instruments purchased with proceeds of a stock offering or a public offering of our debt with a term of at least five years, but only for the one-year period commencing with our receipt of the offering proceeds).



•

Not more than 25% of our total assets may be represented by securities other than those securities that count favorably toward the preceding 75% asset test.



•

Of the investments included in the preceding 25% asset class, the value of any one non-REIT issuer's securities that we own may not exceed 5% of the value of our total assets. In addition, we may not own more than 10% of the vote or value of any one non-REIT issuer's outstanding securities, unless that issuer is our taxable REIT subsidiary or the securities are "straight debt" securities or otherwise excepted as discussed below.



•

Our stock and securities in a taxable REIT subsidiary are exempted from the preceding 10% and 5% asset tests. However, no more than 25% (for our 2008 taxable year and earlier, 20%) of our total assets may be represented by stock or securities of taxable REIT subsidiaries.

        When a failure to satisfy the above asset tests results from an acquisition of securities or other property during a quarter, the failure can be cured by disposition of sufficient nonqualifying assets within 30 days after the close of that quarter.

        In addition, if we fail the 5% value test or the 10% vote or value tests at the close of any quarter and do not cure such failure within 30 days after the close of that quarter, that failure will nevertheless be excused if (a) the failure is de minimis and (b) within 6 months after the last day of the quarter in which we identify the failure, we either dispose of the assets causing the failure or otherwise satisfy the 5% value and 10% vote and value asset tests. For purposes of this relief provision, the failure will be "de minimis" if the value of the assets causing the failure does not exceed the lesser of (a) 1% of the total value of our assets at the end of the relevant quarter or (b) $10,000,000. If our failure is not de

24

Table of Contents

minimis, or if any of the other REIT asset tests have been violated, we may nevertheless qualify as a REIT if (a) we provide the IRS with a description of each asset causing the failure, (b) the failure was due to reasonable cause and not willful neglect, (c) we pay a tax equal to the greater of (i) $50,000 or (ii) the highest rate of corporate tax imposed (currently 35%) on the net income generated by the assets causing the failure during the period of the failure, and (d) within 6 months after the last day of the quarter in which we identify the failure, we either dispose of the assets causing the failure or otherwise satisfy all of the REIT asset tests. These relief provisions apply to any failure of the applicable asset tests, even if the failure first occurred in a prior taxable year.

        The IRC also provides an excepted securities safe harbor to the 10% value test that includes among other items (a) "straight debt" securities, (b) certain rental agreements in which payment is to be made in subsequent years, (c) any obligation to pay rents from real property, (d) securities issued by governmental entities that are not dependent in whole or in part on the profits of or payments from a nongovernmental entity, and (e) any security issued by another REIT.

        We have maintained and will continue to maintain records of the value of our assets to document our compliance with the above asset tests, and intend to take actions as may be required to cure any failure to satisfy the tests within 30 days after the close of any quarter.

        Our Relationship with Five Star.     In 2001, we and HRP spun off substantially all of our Five Star common shares. In August 2009, we closed a mortgage financing with FNMA and in connection with the FNMA transaction, we realigned our leases with Five Star. Pursuant to the terms of the realignment agreement, we also purchased 3,200,000 common shares from Five Star, which, when aggregated with our prior ownership of Five Star common shares, then represented approximately 9.1% of the total common shares of Five Star outstanding, determined after this new issuance (also 9.1% as of December 31, 2009). Our leases with Five Star, Five Star's charter, the transaction agreement governing the 2001 spin off, and the realignment agreement collectively contain restrictions upon the ownership of Five Star common shares and require Five Star to refrain from taking any actions that may result in any affiliation with us that would jeopardize our qualification as a REIT under the IRC. Accordingly, commencing with our 2002 taxable year, we expect that the rental income we receive from Five Star and its subsidiaries will be "rents from real property" under Section 856(d) of the IRC, and therefore qualifying income under the 75% and 95% gross income tests described above.

        Leases with Taxable REIT Subsidiaries.     In certain future circumstances, we may find it advantageous to lease properties to one or more taxable REIT subsidiaries. For example, in response to a lease default or termination, we may choose to lease a reclaimed qualified health care property to a taxable REIT subsidiary, which in turn would engage an eligible independent contractor (within the meaning of Section 856(d)(9)(A) of the IRC) to manage and operate the property. For these purposes, a qualified health care property is defined in Section 856(e)(6)(D)(i) of the IRC and includes both health care facilities and property necessary or incidental to the use of a health care facility. In any such transaction involving a taxable REIT subsidiary, our intent would be that the rents paid to us by the taxable REIT subsidiary would qualify as "rents from real property" under the REIT gross income tests summarized above.

        Annual Distribution Requirements.     In order to qualify for taxation as a REIT under the IRC, we are required to make annual distributions other than capital gain dividends to our shareholders in an amount at least equal to the excess of:

        (A)  the sum of 90% of our "real estate investment trust taxable income," as defined in Section 857 of the IRC, computed by excluding any net capital gain and before taking into account any dividends paid deduction for which we are eligible, and 90% of our net income after tax, if any, from property received in foreclosure, over

25

Table of Contents

        (B)  the sum of our qualifying noncash income, e.g ., imputed rental income or income from transactions inadvertently failing to qualify as like-kind exchanges.

The distributions must be paid in the taxable year to which they relate, or in the following taxable year if declared before we timely file our tax return for the earlier taxable year and if paid on or before the first regular distribution payment after that declaration. If a dividend is declared in October, November, or December to shareholders of record during one of those months, and is paid during the following January, then for federal income tax purposes the dividend will be treated as having been both paid and received on December 31 of the prior taxable year. A distribution which is not pro rata within a class of our beneficial interests entitled to a distribution, or which is not consistent with the rights to distributions among our classes of beneficial interests, is a preferential distribution that is not taken into consideration for purposes of the distribution requirements, and accordingly the payment of a preferential distribution could affect our ability to meet the distribution requirements. Taking into account our distribution policies, including the dividend reinvestment plan we have adopted, we do not believe that we have made or will make any preferential distributions. The distribution requirements may be waived by the IRS if a REIT establishes that it failed to meet them by reason of distributions previously made to meet the requirements of the 4% excise tax discussed below. To the extent that we do not distribute all of our net capital gain and all of our real estate investment trust taxable income, as adjusted, we will be subject to tax on undistributed amounts.

        In addition, we will be subject to a 4% nondeductible excise tax to the extent we fail within a calendar year to make required distributions to our shareholders of 85% of our ordinary income and 95% of our capital gain net income plus the excess, if any, of the "grossed up required distribution" for the preceding calendar year over the amount treated as distributed for that preceding calendar year. For this purpose, the term "grossed up required distribution" for any calendar year is the sum of our taxable income for the calendar year without regard to the deduction for dividends paid and all amounts from earlier years that are not treated as having been distributed under the provision. We will be treated as having sufficient earnings and profits to treat as a dividend any distribution by us up to the amount required to be distributed in order to avoid imposition of the 4% excise tax.

        Pursuant to Revenue Procedure 2010-12 and for taxable years ending on or before December 31, 2011, the IRS has indicated that it will respect certain distributions from a publicly traded REIT paid partly in cash and partly in stock as distributions that count toward the REIT's annual distribution requirements. Under Revenue Procedure 2010-12, a publicly traded REIT may pay a distribution partly in shares if each shareholder is permitted to elect to receive his or her distribution in either shares or cash, provided that: (a) the amount of cash that is set aside to be distributed, or cash limitation, is not less than 10% of the total distribution; and (b) if the aggregate amount of cash that shareholders elect to receive exceeds the cash limitation, the full amount of the allocated cash will be distributed pro rata to each shareholder electing to receive cash, such amount being at least 10% of each such shareholder's total distribution. Accordingly, if we elect to pay a distribution to our common shareholders partly in cash and partly in shares with a cash election feature in accordance with this Revenue Procedure 2010-12, then the total distribution will include both the stock component and the cash component, and your tax liability with respect to that distribution may exceed the amount of cash that you receive.

        If we do not have enough cash or other liquid assets to meet the 90% distribution requirements, we may find it necessary and desirable to arrange for new debt or equity financing to provide funds for required distributions in order to maintain our REIT status. We can provide no assurance that financing would be available for these purposes on favorable terms.

        We may be able to rectify a failure to pay sufficient dividends for any year by paying "deficiency dividends" to shareholders in a later year. These deficiency dividends may be included in our deduction

26

Table of Contents

for dividends paid for the earlier year, but an interest charge would be imposed upon us for the delay in distribution.

        In addition to the other distribution requirements above, to preserve our status as a REIT we are required to timely distribute C corporation earnings and profits that we inherit from acquired corporations.

Acquisition of C Corporations

        On each of January 11, 2002, March 31, 2008, and November 1, 2008, we acquired all of the outstanding stock of a C corporation. At the time of those acquisitions, certain of those C corporations directly or indirectly owned all of the outstanding equity interests in various corporate and noncorporate subsidiaries. On October 1, 2006, we acquired all of the outstanding stock of an S corporation and its disregarded entity subsidiary, which were formerly C corporations. Upon these acquisitions, each of the acquired entities became either our qualified REIT subsidiary under Section 856(i) of the IRC or a disregarded entity under Treasury regulations issued under Section 7701 of the IRC. Thus, after the acquisition, all assets, liabilities and items of income, deduction and credit of the acquired entities have been treated as ours for purposes of the various REIT qualification tests described above. In addition, we generally were treated as the successor to the acquired entities' federal income tax attributes, such as those entities' adjusted tax bases in their assets and their depreciation schedules; we were also treated as the successor to the acquired corporate entities' earnings and profits for federal income tax purposes, if any.

        Built-in Gains from C Corporations.     As described above, notwithstanding our qualification and taxation as a REIT, we may still be subject to corporate taxation in particular circumstances. Specifically, if we acquire an asset from a corporation in a transaction in which our adjusted tax basis in the asset is determined by reference to the adjusted tax basis of that asset in the hands of a present or former C corporation, and if we subsequently recognize gain on the disposition of that asset during the ten year period beginning on the date on which the asset ceased to be owned by the C corporation, then we will generally pay tax at the highest regular corporate tax rate, currently 35%, on the lesser of (1) the excess, if any, of the asset's fair market value over its adjusted tax basis, each determined as of the time the asset ceased to be owned by the C corporation, or (2) our gain recognized in the disposition. Accordingly, any taxable disposition of an asset so acquired during the applicable ten year period could be subject to tax under these rules. Notwithstanding the ten year recognition period otherwise prescribed, recent legislation appears to reduce the recognition period from ten to seven years for each of the 2009 and 2010 tax years, and we thus expect any 2009 or 2010 disposition of assets that we acquired in the January 11, 2002 transaction to not attract corporate level tax. However, except as described below, we have not disposed, and have no present plan or intent to dispose, of any material assets acquired in such transactions.

        Immediately after the January 11, 2002 acquisition, we conveyed to Five Star and its subsidiaries operating assets that were of a type that are typically owned by the tenant of a senior living facility. In exchange, Five Star and its subsidiaries assumed related operating liabilities. The aggregate adjusted tax basis in the transferred operating assets was less than the related liabilities assumed, and Five Star and its subsidiaries received a cash payment from us in the amount of the difference. We believe that the fair market value of these conveyed operating assets equaled their adjusted tax bases, and we and Five Star agreed to perform our respective tax return reporting to that effect. Accordingly, although Sullivan & Worcester LLP is unable to render an opinion on factual determinations such as assets' fair market value, we reported no gain or loss, and therefore owed no corporate level tax under the rules for dispositions of former C corporation assets, in respect of this conveyance of operating assets to Five Star.

27

Table of Contents

        To the extent of our gains in a taxable year that are subject to the built-in gains tax described above, net of any taxes paid on such gains with respect to that taxable year, our taxable dividends paid to you in the following year are eligible for treatment as qualified dividends that are taxed to our noncorporate shareholders at the maximum capital gain rate of 15% (scheduled to expire for taxable years beginning after December 31, 2010).

        Earnings and Profits.     A REIT may not have any undistributed C corporation earnings and profits at the end of any taxable year. Upon the closing of our corporate acquisitions, we succeeded to the undistributed earnings and profits, if any, of the acquired corporate entities. Thus, we needed to distribute any such earnings and profits no later than the end of the applicable tax year. If we failed to do so, we would not qualify to be taxed as a REIT for that year and a number of years thereafter, unless we are able to rely on the relief provision described below.

        Although Sullivan & Worcester LLP is unable to render an opinion on factual determinations such as the amount of undistributed earnings and profits, we made an investigation of or retained accountants to compute the amount of undistributed earnings and profits that we inherited in our corporate acquisitions. Based on these calculations, we believe that we did not inherit any undistributed earnings and profits that remained undistributed at the end of the applicable tax year. However, there can be no assurance that the IRS would not, upon subsequent examination, propose adjustments to our calculation of the undistributed earnings and profits that we inherited, including adjustments that might be deemed necessary by the IRS as a result of its examination of the companies we acquired. In any such examination, the IRS might consider all taxable years of the acquired subsidiaries as open for review for purposes of its proposed adjustments. If it is subsequently determined that we had undistributed earnings and profits as of the end of the applicable tax year, we may be eligible for a relief provision similar to the "deficiency dividends" procedure described above. To utilize this relief provision, we would have to pay an interest charge for the delay in distributing the undistributed earnings and profits; in addition, we would be required to distribute to our shareholders, in addition to our other REIT distribution requirements, the amount of the undistributed earnings and profits less the interest charge paid.

Depreciation and Federal Income Tax Treatment of Leases

        Our initial tax bases in our assets will generally be our acquisition cost. We will generally depreciate our real property on a straight-line basis over 40 years and our personal property over the applicable shorter periods. These depreciation schedules may vary for properties that we acquire through tax-free or carryover basis acquisitions.

        We are entitled to depreciation deductions from our facilities only if we are treated for federal income tax purposes as the owner of the facilities. This means that the leases of the facilities must be classified for federal income tax purposes as true leases, rather than as sales or financing arrangements, and we believe this to be the case. In the case of sale-leaseback arrangements, the IRS could assert that we realized prepaid rental income in the year of purchase to the extent that the value of a leased property, at the time of purchase, exceeded the purchase price for that property. While we believe that the value of leased property at the time of purchase did not exceed purchase prices, because of the lack of clear precedent we cannot provide assurances as to whether the IRS might successfully assert the existence of prepaid rental income in any of our sale-leaseback transactions.

Taxation of U.S. Shareholders

        The maximum individual federal income tax rate for long-term capital gains is generally 15% (scheduled to increase to 20% for taxable years beginning after December 31, 2010) and for most corporate dividends is generally also 15% (scheduled to increase to ordinary income rates for taxable years beginning after December 31, 2010). However, because we are not generally subject to federal

28

Table of Contents

income tax on the portion of our REIT taxable income or capital gains distributed to our shareholders, dividends on our shares generally are not eligible for such 15% tax rate on dividends while that rate is in effect. As a result, our ordinary dividends continue to be taxed at the higher federal income tax rates applicable to ordinary income. However, the favorable federal income tax rates for long-term capital gains, and while in effect, for dividends, generally apply to:

(1)

your long-term capital gains, if any, recognized on the disposition of our shares;



(2)

our distributions designated as long-term capital gain dividends (except to the extent attributable to real estate depreciation recapture, in which case the distributions are subject to a maximum 25% federal income tax rate);



(3)

our dividends attributable to dividends, if any, received by us from non-REIT corporations such as taxable REIT subsidiaries; and



(4)

our dividends to the extent attributable to income upon which we have paid federal corporate income tax.

        As long as we qualify as a REIT for federal income tax purposes, a distribution to our U.S. shareholders that we do not designate as a capital gain dividend will be treated as an ordinary income dividend to the extent of our current or accumulated earnings and profits. Distributions made out of our current or accumulated earnings and profits that we properly designate as capital gain dividends will be taxed as long-term capital gains, as discussed below, to the extent they do not exceed our actual net capital gain for the taxable year. However, corporate shareholders may be required to treat up to 20% of any capital gain dividend as ordinary income under Section 291 of the IRC.

        In addition, we may elect to retain net capital gain income and treat it as constructively distributed. In that case:

(1)

we will be taxed at regular corporate capital gains tax rates on retained amounts;



(2)

each U.S. shareholder will be taxed on its designated proportionate share of our retained net capital gains as though that amount were distributed and designated a capital gain dividend;



(3)

each U.S. shareholder will receive a credit for its designated proportionate share of the tax that we pay;



(4)

each U.S. shareholder will increase its adjusted basis in our shares by the excess of the amount of its proportionate share of these retained net capital gains over its proportionate share of the tax that we pay; and



(5)

both we and our corporate shareholders will make commensurate adjustments in our respective earnings and profits for federal income tax purposes.

If we elect to retain our net capital gains in this fashion, we will notify our U.S. shareholders of the relevant tax information within 60 days after the close of the affected taxable year.

        As discussed above, for noncorporate U.S. shareholders, long-term capital gains are generally taxed at maximum rates of 15% (scheduled to increase to 20% for taxable years beginning after December 31, 2010) or 25%, depending upon the type of property disposed of and the previously claimed depreciation with respect to this property. If for any taxable year we designate capital gain dividends for U.S. shareholders, then a portion of the capital gain dividends we designate will be allocated to the holders of a particular class of shares on a percentage basis equal to the ratio of the amount of the total dividends paid or made available for the year to the holders of that class of shares to the total dividends paid or made available for the year to holders of all classes of our shares. We will similarly designate the portion of any capital gain dividend that is to be taxed to noncorporate U.S. shareholders at the maximum rates of 15% (scheduled to increase to 20% for taxable years beginning

29

Table of Contents

after December 31, 2010) or 25% so that the designations will be proportionate among all classes of our shares.

        Distributions in excess of current or accumulated earnings and profits will not be taxable to a U.S. shareholder to the extent that they do not exceed the shareholder's adjusted tax basis in the shareholder's shares, but will reduce the shareholder's basis in those shares. To the extent that these excess distributions exceed the adjusted basis of a U.S. shareholder's shares, they will be included in income as capital gain, with long-term gain generally taxed to noncorporate U.S. shareholders at a maximum rate of 15% (scheduled to increase to 20% for taxable years beginning after December 31, 2010). No U.S. shareholder may include on his federal income tax return any of our net operating losses or any of our capital losses.

        If a dividend is declared in October, November, or December to shareholders of record during one of those months, and is paid during the following January, then for federal income tax purposes the dividend will be treated as having been both paid and received on December 31 of the prior taxable year. Also, items that are treated differently for regular and alternative minimum tax purposes are to be allocated between a REIT and its shareholders under Treasury regulations which are to be prescribed. It is possible that these Treasury regulations will require tax preference items to be allocated to our shareholders with respect to any accelerated depreciation or other tax preference items that we claim.

        A U.S. shareholder will generally recognize gain or loss equal to the difference between the amount realized and the shareholder's adjusted basis in our shares that are sold or exchanged. This gain or loss will be capital gain or loss, and will be long-term capital gain or loss if the shareholder's holding period in the shares exceeds one year. In addition, any loss upon a sale or exchange of our shares held for six months or less will generally be treated as a long-term capital loss to the extent of our long-term capital gain dividends during the holding period.

        The IRC imposes a penalty for the failure to properly disclose a "reportable transaction." A reportable transaction currently includes, among other things, a sale or exchange of our shares resulting in a tax loss in excess of (i) $10 million in any single year or $20 million in any combination of years in the case of our shares held by a C corporation or by a partnership with only C corporation partners or (ii) $2 million in any single year or $4 million in any combination of years in the case of our shares held by any other partnership or an S corporation, trust or individual, including losses that flow through pass through entities to individuals. A taxpayer discloses a reportable transaction by filing IRS Form 8886 with its federal income tax return and, in the first year of filing, a copy of Form 8886 must be sent to the IRS's Office of Tax Shelter Analysis. The penalty for failing to disclose a reportable transaction is generally $10,000 in the case of a natural person and $50,000 in any other case.

        Noncorporate U.S. shareholders who borrow funds to finance their acquisition of our shares could be limited in the amount of deductions allowed for the interest paid on the indebtedness incurred. Under Section 163(d) of the IRC, interest paid or accrued on indebtedness incurred or continued to purchase or carry property held for investment is generally deductible only to the extent of the investor's net investment income. A U.S. shareholder's net investment income will include ordinary income dividend distributions received from us and, if an appropriate election is made by the shareholder, capital gain dividend distributions received from us; however, distributions treated as a nontaxable return of the shareholder's basis will not enter into the computation of net investment income.

Taxation of Tax-Exempt Shareholders

        In Revenue Ruling 66-106, the IRS ruled that amounts distributed by a REIT to a tax-exempt employees' pension trust did not constitute "unrelated business taxable income," even though the REIT may have financed some of its activities with acquisition indebtedness. Although revenue rulings are

30

Table of Contents

interpretive in nature and subject to revocation or modification by the IRS, based upon the analysis and conclusion of Revenue Ruling 66-106, our distributions made to shareholders that are tax-exempt pension plans, individual retirement accounts, or other qualifying tax-exempt entities should not constitute unrelated business taxable income, provided that the shareholder has not financed its acquisition of our shares with "acquisition indebtedness" within the meaning of the IRC, and provided further that, consistent with our present intent, we do not hold a residual interest in a real estate mortgage investment conduit.

        Tax-exempt pension trusts that own more than 10% by value of a "pension-held REIT" at any time during a taxable year may be required to treat a percentage of all dividends received from the pension-held REIT during the year as unrelated business taxable income. This percentage is equal to the ratio of:

(1)

the pension-held REIT's gross income derived from the conduct of unrelated trades or businesses, determined as if the pension-held REIT were a tax-exempt pension fund, less direct expenses related to that income, to



(2)

the pension-held REIT's gross income from all sources, less direct expenses related to that income,

except that this percentage shall be deemed to be zero unless it would otherwise equal or exceed 5%. A REIT is a pension-held REIT if:

•

the REIT is "predominantly held" by tax-exempt pension trusts; and



•

the REIT would fail to satisfy the "closely held" ownership requirement discussed above if the stock or beneficial interests in the REIT held by tax-exempt pension trusts were viewed as held by tax-exempt pension trusts rather than by their respective beneficiaries.

A REIT is predominantly held by tax-exempt pension trusts if at least one tax-exempt pension trust owns more than 25% by value of the REIT's stock or beneficial interests, or if one or more tax-exempt pension trusts, each owning more than 10% by value of the REIT's stock or beneficial interests, own in the aggregate more than 50% by value of the REIT's stock or beneficial interests. Because of the share ownership concentration restrictions in our declaration of trust, we believe that we are not and will not be a pension-held REIT. However, because our shares are publicly traded, we cannot completely control whether or not we are or will become a pension-held REIT.

        Social clubs, voluntary employee benefit associations, supplemental unemployment benefit trusts and qualified group legal services plans exempt from federal income taxation under Sections 501(c)(7), (c)(9), (c)(17) and (c)(20) of the IRC, respectively, are subject to different unrelated business taxable income rules, which generally will require them to characterize distributions from a REIT as unrelated business taxable income. In addition, these prospective investors should consult their own tax advisors concerning any "set aside" or reserve requirements applicable to them.

Taxation of Non-U.S. Shareholders

        The rules governing the United States federal income taxation of non-U.S. shareholders are complex, and the following discussion is intended only as a summary of these rules. If you are a non-U.S. shareholder, we urge you to consult with your own tax advisor to determine the impact of United States federal, state, local, and foreign tax laws, including any tax return filing and other reporting requirements, with respect to your investment in our shares.

        In general, a non-U.S. shareholder will be subject to regular United States federal income tax in the same manner as a U.S. shareholder with respect to its investment in our shares if that investment is effectively connected with the non-U.S. shareholder's conduct of a trade or business in the United States (and, if provided by an applicable income tax treaty, is attributable to a permanent establishment

31

Table of Contents

or fixed base the non-U.S. shareholder maintains in the United States). In addition, a corporate non-U.S. shareholder that receives income that is or is deemed effectively connected with a trade or business in the United States may also be subject to the 30% branch profits tax under Section 884 of the IRC, which is payable in addition to regular United States federal corporate income tax. The balance of this discussion of the United States federal income taxation of non-U.S. shareholders addresses only those non-U.S. shareholders whose investment in our shares is not effectively connected with the conduct of a trade or business in the United States.

        A distribution by us to a non-U.S. shareholder that is not attributable to gain from the sale or exchange of a United States real property interest and that is not designated as a capital gain dividend will be treated as an ordinary income dividend to the extent that it is made out of current or accumulated earnings and profits. A distribution of this type will generally be subject to United States federal income tax and withholding at the rate of 30%, or at a lower rate if the non-U.S. shareholder has in the manner prescribed by the IRS demonstrated its entitlement to benefits under a tax treaty. In the case of any in kind distributions of property, we or other applicable withholding agents will collect the amount required to be withheld by reducing to cash for remittance to the IRS a sufficient portion of the property that the non-U.S. shareholder would otherwise receive, and the non-U.S. shareholder may bear brokerage or other costs for this withholding procedure. Because we cannot determine our current and accumulated earnings and profits until the end of the taxable year, withholding at the rate of 30% or applicable lower treaty rate will generally be imposed on the gross amount of any distribution to a non-U.S. shareholder that we make and do not designate a capital gain dividend. Notwithstanding this withholding on distributions in excess of our current and accumulated earnings and profits, these distributions are a nontaxable return of capital to the extent that they do not exceed the non-U.S. shareholder's adjusted basis in our shares, and the nontaxable return of capital will reduce the adjusted basis in these shares. To the extent that distributions in excess of current and accumulated earnings and profits exceed the non-U.S. shareholder's adjusted basis in our shares, the distributions will give rise to tax liability if the non-U.S. shareholder would otherwise be subject to tax on any gain from the sale or exchange of these shares, as discussed below. A non-U.S. shareholder may seek a refund from the IRS of amounts withheld on distributions to him in excess of our current and accumulated earnings and profits.

        From time to time, some of our distributions may be attributable to the sale or exchange of United States real property interests. However, capital gain dividends that are received by a non-U.S. shareholder, including dividends attributable to our sales of United States real property interests, and that are deductible by us in respect of our 2005 taxable year and thereafter will be subject to the taxation and withholding regime applicable to ordinary income dividends and the branch profits tax will not apply, provided that (1) the capital gain dividends are received with respect to a class of shares that is "regularly traded" on a domestic "established securities market" such as the NYSE, both as defined by applicable Treasury regulations, and (2) the non-U.S. shareholder does not own more than 5% of that class of shares at any time during the one-year period ending on the date of distribution of the capital gain dividends. If both of these provisions are satisfied, qualifying non-U.S. shareholders will not be subject to withholding on capital gain dividends as though those amounts were effectively connected with a United States trade or business, and qualifying non-U.S. shareholders will not be required to file United States federal income tax returns or pay branch profits tax in respect of these capital gain dividends. Instead, these dividends will be subject to United States federal income tax and withholding as ordinary dividends, currently at a 30% tax rate unless reduced by applicable treaty, as discussed below. Although there can be no assurance in this regard, we believe that our common shares have been and will remain "regularly traded" on a domestic "established securities market" within the meaning of applicable Treasury regulations; however, we can provide no assurance that our shares will continue to be "regularly traded" on a domestic "established securities market" in future taxable years.

32

Table of Contents

        Except as discussed above, for any year in which we qualify as a REIT, distributions that are attributable to gain from the sale or exchange of a United States real property interest are taxed to a non-U.S. shareholder as if these distributions were gains effectively connected with a trade or business in the United States conducted by the non-U.S. shareholder. Accordingly, a non-U.S. shareholder that does not qualify for the special rule above will be taxed on these amounts at the normal capital gain rates applicable to a U.S. shareholder, subject to any applicable alternative minimum tax and to a special alternative minimum tax in the case of nonresident alien individuals; such a non-U.S. shareholder will be required to file a United States federal income tax return reporting these amounts, even if applicable withholding is imposed as described below; and such a non-U.S. shareholder that is also a corporation may owe the 30% branch profits tax under Section 884 of the IRC in respect of these amounts. We or other applicable withholding agents will be required to withhold from distributions to such non-U.S. shareholders, and remit to the IRS, 35% of the maximum amount of any distribution that could be designated as a capital gain dividend. In addition, for purposes of this withholding rule, if we designate prior distributions as capital gain dividends, then subsequent distributions up to the amount of the designated prior distributions will be treated as capital gain dividends. The amount of any tax withheld is creditable against the non-U.S. shareholder's United States federal income tax liability, and the non-U.S. shareholder may file for a refund from the IRS of any amount of withheld tax in excess of that tax liability.

        Effective generally from and after 2006, a special "wash sale" rule applies to a non-U.S. shareholder who owns any class of our shares if (1) the shareholder owns more than 5% of that class of shares at any time during the one-year period ending on the date of the distribution described below, or (2) that class of our shares is not, within the meaning of applicable Treasury regulations, "regularly traded" on a domestic "established securities market" such as the NYSE. Although there can be no assurance in this regard, we believe that our common shares have been and will remain "regularly traded" on a domestic "established securities market" within the meaning of applicable Treasury regulations, all as discussed above; however, we can provide no assurance that our shares will continue to be "regularly traded" on a domestic "established securities market" in future taxable years. We thus anticipate this wash sale rule to apply, if at all, only to a non-U.S. shareholder that owns more than 5% of either our common shares or any class of our preferred shares. Such a non-U.S. shareholder will be treated as having made a "wash sale" of our shares if it (1) disposes of an interest in our shares during the 30 days preceding the ex-dividend date of a distribution by us that, but for such disposition, would have been treated by the non-U.S. shareholder in whole or in part as gain from the sale or exchange of a United States real property interest, and then (2) acquires or enters into a contract to acquire a substantially identical interest in our shares, either actually or constructively through a related party, during the 61-day period beginning 30 days prior to the ex-dividend date. In the event of such a wash sale, the non-U.S. shareholder will have gain from the sale or exchange of a United States real property interest in an amount equal to the portion of the distribution that, but for the wash sale, would have been a gain from the sale or exchange of a United States real property interest. As discussed above, a non-U.S. shareholder's gain from the sale or exchange of a United States real property interest can trigger increased United States taxes, such as the branch profits tax applicable to non-U.S. corporations, and increased United States tax filing requirements.

        If for any taxable year we designate capital gain dividends for our shareholders, then a portion of the capital gain dividends we designate will be allocated to the holders of a particular class of shares on a percentage basis equal to the ratio of the amount of the total dividends paid or made available for the year to the holders of that class of shares to the total dividends paid or made available for the year to holders of all classes of our shares.

        Tax treaties may reduce the withholding obligations on our distributions. Under some treaties, however, rates below 30% that are applicable to ordinary income dividends from United States corporations may not apply to ordinary income dividends from a REIT or may apply only if the REIT

33

Table of Contents

meets certain additional conditions. You must generally use an applicable IRS Form W-8, or substantially similar form, to claim tax treaty benefits. If the amount of tax withheld with respect to a distribution to a non-U.S. shareholder exceeds the shareholder's United States federal income tax liability with respect to the distribution, the non-U.S. shareholder may file for a refund of the excess from the IRS. The 35% withholding tax rate discussed above on some capital gain dividends corresponds to the maximum income tax rate applicable to corporate non-U.S. shareholders but is higher than the current 15% and 25% maximum rates on capital gains generally applicable to noncorporate non-U.S. shareholders. Treasury regulations also provide special rules to determine whether, for purposes of determining the applicability of a tax treaty, our distributions to a non-U.S. shareholder that is an entity should be treated as paid to the entity or to those owning an interest in that entity, and whether the entity or its owners are entitled to benefits under the tax treaty. In the case of any in kind distributions of property, we or other applicable withholding agents will have to collect the amount required to be withheld by reducing to cash for remittance to the IRS a sufficient portion of the property that the non-U.S. shareholder would otherwise receive, and the non-U.S. shareholder may bear brokerage or other costs for this withholding procedure.

        If our shares are not "United States real property interests" within the meaning of Section 897 of the IRC, then a non-U.S. shareholder's gain on sale of these shares generally will not be subject to United States federal income taxation, except that a nonresident alien individual who was in the United States for 183 days or more during the taxable year may be subject to a 30% tax on this gain. Our shares will not constitute a United States real property interest if we are a "domestically controlled REIT." A domestically controlled REIT is a REIT in which at all times during the preceding five-year period less than 50% in value of its shares is held directly or indirectly by foreign persons. We believe that we have been and will remain a domestically controlled REIT and thus a non-U.S. shareholder's gain on sale of our shares will not be subject to United States federal income taxation. However, because our shares are publicly traded, we can provide no assurance that we have been or will remain a domestically controlled REIT. If we are not a domestically controlled REIT, a non-U.S. shareholder's gain on sale of our shares will not be subject to United States federal income taxation as a sale of a United States real property interest, if that class of shares is "regularly traded," as defined by applicable Treasury regulations, on an established securities market like the NYSE, and the non-U.S. shareholder has at all times during the preceding five years owned 5% or less by value of that class of shares. In this regard, because the shares of others may be redeemed, a non-U.S. shareholder's percentage interest in a class of our shares may increase even if it acquires no additional shares in that class. If the gain on the sale of our shares were subject to United States federal income taxation, the non-U.S. shareholder will generally be subject to the same treatment as a U.S. shareholder with respect to its gain, will be required to file a United States federal income tax return reporting that gain, and a corporate non-U.S. shareholder might owe branch profits tax under Section 884 of the IRC. A purchaser of our shares from a non-U.S. shareholder will not be required to withhold on the purchase price if the purchased shares are regularly traded on an established securities market or if we are a domestically controlled REIT. Otherwise, a purchaser of our shares from a non-U.S. shareholder may be required to withhold 10% of the purchase price paid to the non-U.S. shareholder and to remit the withheld amount to the IRS.

Backup Withholding and Information Reporting

        Information reporting and backup withholding may apply to distributions or proceeds paid to our shareholders under the circumstances discussed below. The backup withholding rate is currently 28% and is scheduled to increase to 31% after 2010. Amounts withheld under backup withholding are generally not an additional tax and may be refunded by the IRS or credited against the shareholder's federal income tax liability. In the case of any in kind distributions of property by us to a shareholder, we or other applicable withholding agents will have to collect any applicable backup withholding by reducing to cash for remittance to the IRS a sufficient portion of the property that our shareholder would otherwise receive, and the shareholder may bear brokerage or other costs for this withholding procedure.

34

Table of Contents

        A U.S. shareholder will be subject to backup withholding when it receives distributions on our shares or proceeds upon the sale, exchange, redemption, retirement or other disposition of our shares, unless the U.S. shareholder properly executes, or has previously properly executed, under penalties of perjury an IRS Form W-9 or substantially similar form that:

•

provides the U.S. shareholder's correct taxpayer identification number; and



•

certifies that the U.S. shareholder is exempt from backup withholding because it is a corporation or comes within another exempt category, it has not been notified by the IRS that it is subject to backup withholding, or it has been notified by the IRS that it is no longer subject to backup withholding.

If the U.S. shareholder has not provided and does not provide its correct taxpayer identification number on the IRS Form W-9 or substantially similar form, it may be subject to penalties imposed by the IRS, and we or other applicable withholding agents may have to withhold a portion of any distributions or proceeds paid to such U.S. shareholder. Unless the U.S. shareholder has established on a properly executed IRS Form W-9 or substantially similar form that it is a corporation or comes within another exempt category, distributions or proceeds on our shares paid to it during the calendar year, and the amount of tax withheld, if any, will be reported to it and to the IRS.

        Distributions on our shares to a non-U.S. shareholder during each calendar year and the amount of tax withheld, if any, will generally be reported to the non-U.S. shareholder and to the IRS. This information reporting requirement applies regardless of whether the non-U.S. shareholder is subject to withholding on distributions on our shares or whether the withholding was reduced or eliminated by an applicable tax treaty. Also, distributions paid to a non-U.S. shareholder on our shares may be subject to backup withholding, unless the non-U.S. shareholder properly certifies its non-U.S. shareholder status on an IRS Form W-8 or substantially similar form in the manner described above. Similarly, information reporting and backup withholding will not apply to proceeds a non-U.S. shareholder receives upon the sale, exchange, redemption, retirement or other disposition of our shares, if the non-U.S. shareholder properly certifies its non-U.S. shareholder status on an IRS Form W-8 or substantially similar form. Even without having executed an IRS Form W-8 or substantially similar form, however, in some cases information reporting and backup withholding will not apply to proceeds that a non-U.S. shareholder receives upon the sale, exchange, redemption, retirement or other disposition of our shares if the non-U.S. shareholder receives those proceeds through a broker's foreign office.

Other Tax Consequences

        Our tax treatment and that of our shareholders may be modified by legislative, judicial, or administrative actions at any time, which actions may be retroactive in effect. The rules dealing with federal income taxation are constantly under review by the Congress, the IRS and the Treasury Department, and statutory changes, new regulations, revisions to existing regulations, and revised interpretations of established concepts are issued frequently. Likewise, the rules regarding taxes other than federal income taxes may also be modified. No prediction can be made as to the likelihood of passage of new tax legislation or other provisions, or the direct or indirect effect on us and our shareholders. Revisions to tax laws and interpretations of these laws could adversely affect the tax or other consequences of an investment in our shares. We and our shareholders may also be subject to taxation by state, local or other jurisdictions, including those in which we or our shareholders transact business or reside. These tax consequences may not be comparable to the federal income tax consequences discussed above.

35

Table of Contents

ERISA PLANS, KEOGH PLANS AND INDIVIDUAL RETIREMENT ACCOUNTS

General Fiduciary Obligations

        Fiduciaries of a pension, profit-sharing or other employee benefit plan subject to Title I of the Employee Retirement Income Security Act of 1974, as amended, or ERISA, must consider whether:

•

their investment in our shares satisfies the diversification requirements of ERISA;



•

the investment is prudent in light of possible limitations on the marketability of our shares;



•

they have authority to acquire our shares under the applicable governing instrument and Title I of ERISA; and



•

the investment is otherwise consistent with their fiduciary responsibilities.

        Trustees and other fiduciaries of an ERISA plan may incur personal liability for any loss suffered by the plan on account of a violation of their fiduciary responsibilities. In addition, these fiduciaries may be subject to a civil penalty of up to 20% of any amount recovered by the plan on account of a violation. Fiduciaries of any IRA, Roth IRA, Keogh Plan or other qualified retirement plan not subject to Title I of ERISA, referred to as "non-ERISA plans," should consider that a plan may only make investments that are authorized by the appropriate governing instrument.

        Fiduciaries considering an investment in our securities should consult their own legal advisors if they have any concern as to whether the investment is consistent with the foregoing criteria or is otherwise appropriate. The sale of our securities to a plan is in no respect a representation by us or any underwriter of the securities that the investment meets all relevant legal requirements with respect to investments by plans generally or any particular plan, or that the investment is appropriate for plans generally or any particular plan.

Prohibited Transactions

        Fiduciaries of ERISA plans and persons making the investment decision for an IRA or other non-ERISA plan should consider the application of the prohibited transaction provisions of ERISA and the IRC in making their investment decision. Sales and other transactions between an ERISA or non-ERISA plan, and persons related to it, are prohibited transactions. The particular facts concerning the sponsorship, operations and other investments of an ERISA plan or non-ERISA plan may cause a wide range of other persons to be treated as disqualified persons or parties in interest with respect to it. A prohibited transaction, in addition to imposing potential personal liability upon fiduciaries of ERISA plans, may also result in the imposition of an excise tax under the IRC or a penalty under ERISA upon the disqualified person or party in interest with respect to the plan. If the disqualified person who engages in the transaction is the individual on behalf of whom an IRA or Roth IRA is maintained or his beneficiary, the IRA or Roth IRA may lose its tax-exempt status and its assets may be deemed to have been distributed to the individual in a taxable distribution on account of the prohibited transaction, but no excise tax will be imposed. Fiduciaries considering an investment in our securities should consult their own legal advisors as to whether the ownership of our securities involves a prohibited transaction.

"Plan Assets" Considerations

        The Department of Labor, which has administrative responsibility over ERISA plans as well as non-ERISA plans, has issued a regulation defining "plan assets." The regulation generally provides that when an ERISA or non-ERISA plan acquires a security that is an equity interest in an entity and that security is neither a "publicly offered security" nor a security issued by an investment company registered under the Investment Company Act of 1940, as amended, the ERISA plan's or non-ERISA plan's assets include both the equity interest and an undivided interest in each of the underlying assets

36

Table of Contents

of the entity, unless it is established either that the entity is an operating company or that equity participation in the entity by benefit plan investors is not significant.

        Each class of our shares (that is, our common shares and any class of preferred shares that we may issue) must be analyzed separately to ascertain whether it is a publicly offered security. The regulation defines a publicly offered security as a security that is "widely held," "freely transferable" and either part of a class of securities registered under the Exchange Act, or sold under an effective registration statement under the Securities Act of 1933, as amended, provided the securities are registered under the Exchange Act within 120 days after the end of the fiscal year of the issuer during which the offering occurred. Each class of our outstanding shares has been registered under the Exchange Act within the necessary time frame to satisfy the foregoing condition.

        The regulation provides that a security is "widely held" only if it is part of a class of securities that is owned by 100 or more investors independent of the issuer and of one another. However, a security will not fail to be "widely held" because the number of independent investors falls below 100 subsequent to the initial public offering as a result of events beyond the issuer's control. We believe our common shares are and will remain widely held, and we expect the same to be true of any class of preferred shares that we may issue, but we can give no assurances in this regard.

        The regulation provides that whether a security is "freely transferable" is a factual question to be determined on the basis of all relevant facts and circumstances. The regulation further provides that, where a security is part of an offering in which the minimum investment is $10,000 or less, some restrictions on transfer ordinarily will not, alone or in combination, affect a finding that these securities are freely transferable. The restrictions on transfer enumerated in the regulation as not affecting that finding include:

•

any restriction on or prohibition against any transfer or assignment which would result in a termination or reclassification for federal or state tax purposes, or would otherwise violate any state or federal law or court order;



•

any requirement that advance notice of a transfer or assignment be given to the issuer and any requirement that either the transferor or transferee, or both, execute documentation setting forth representations as to compliance with any restrictions on transfer which are among those enumerated in the regulation as not affecting free transferability, including those described in the preceding clause of this sentence;



•

any administrative procedure which establishes an effective date, or an event prior to which a transfer or assignment will not be effective; and



•

any limitation or restriction on transfer or assignment that is not imposed by the issuer or a person acting on behalf of the issuer.

        We believe that the restrictions imposed under our declaration of trust on the transfer of shares do not result in the failure of our shares to be "freely transferable." Furthermore, we believe that there exist no other facts or circumstances limiting the transferability of our shares which are not included among those enumerated as not affecting their free transferability under the regulation, and we do not expect or intend to impose in the future, or to permit any person to impose on our behalf, any limitations or restrictions on transfer which would not be among the enumerated permissible limitations or restrictions.

        Assuming that each class of our shares will be "widely held" and that no other facts and circumstances exist which restrict transferability of these shares, we have received an opinion of our counsel, Sullivan & Worcester LLP, that our shares will not fail to be "freely transferable" for purposes of the regulation due to the restrictions on transfer of the shares under our declaration of trust and that under the regulation each class of our currently outstanding shares is publicly offered and our assets will not be deemed to be "plan assets" of any ERISA plan or non-ERISA plan that invests in our shares.

37

Table of Contents