UNITED STATES
SECURITIES AND EXCHANGE COMMISSION

Washington, D.C. 20549

FORM 10-K

(Mark One)

This document contains forward-looking statements, based on numerous assumptions and subject to risks and uncertainties. Although the Company believes that the forward-looking statements are reasonable, it does not and cannot give any assurance that its beliefs and expectations will prove to be correct. Many factors could significantly affect the Company’s operations and cause the Company’s actual results to be substantially different from the Company’s expectations. Those factors include, but are not limited to: (i) general economic and construction business conditions; (ii) customer acceptance of the Company’s products; (iii) materials and manufacturing costs; (iv) the financial condition of customers, competitors and suppliers; (v) technological developments; (vi) increased competition; (vii) changes in capital market conditions; (viii) governmental and business conditions in countries where the Company’s products are manufactured and sold; (ix) changes in trade regulations; (x) the effect of acquisition activity; (xi) changes in the Company’s plans, strategies, objectives, expectations or intentions; and (xii) other risks and uncertainties indicated from time to time in the Company’s filings with the Securities and Exchange Commission. Actual results might differ materially from results suggested by any forward-looking statements in this report. The Company does not have an obligation to publicly update any forward-looking statements, whether as a result of the receipt of new information, the occurrence of future events or otherwise.

processes has also permitted increased operating flexibility and enhanced product design innovation. The Company has developed a quality management system that employs numerous quality-control procedures. The Company has 16 manufacturing locations in the United States, Canada, France, Denmark and England.

The Company is a Delaware corporation organized and merged with its predecessor company in 1999. The Company serves as a holding company for Simpson Strong-Tie and its subsidiaries and for Simpson Dura-Vent.

Industry and Market Trends

Based on trade periodicals, participation in trade and professional associations and communications with governmental and quasi-governmental organizations and with customers and suppliers, the Company believes that a variety of events and trends have resulted in significant developments in the markets that the Company serves. The Company’s products are designed to respond to increasing demand resulting from these trends. Some of these events and trends are discussed below.

Natural disasters throughout the world have focused attention on safety concerns relating to the structural integrity of homes and other buildings. The 1995 earthquake in Kobe, Japan, the 1994 earthquake in Northridge, California, the 1989 Loma Prieta earthquake in Northern California, Hurricanes Hugo in 1989 and Andrew in 1992 and a series of hurricanes in 2004 in the Southeastern United States, and other less cataclysmic natural disasters, damaged and destroyed innumerable homes and other buildings, resulting in heightened consciousness of the fragility of some of those structures.

In recent years, architects, engineers, model code agencies, contractors, building inspectors and legislators have continued efforts to improve structural integrity and safety of homes and other buildings in the face of disasters of various types, including seismic events, storms and fires. Based on ongoing participation in trade and professional associations and communications with governmental and quasi-governmental regulatory agencies, the Company believes that building codes are being more uniformly applied around the country and their enforcement is becoming more rigorous.

Recently, there has been consolidation among several of the Company’s customer groups. The industry has experienced increased complexity in home design and builders are more aggressively trying to reduce their costs. The Company has responded to these trends by marketing its products as systems, in addition to individual parts. In some cases, systems marketing is facilitated by the use of sophisticated design and specification software.

The requirements of the Endangered Species Act, the Federal Lands Policy Management Act and the National Forest Management Act have reduced the amount of timber available for harvest from public lands. Over the past several years, this and other factors have led to the increased use of engineered wood products. Engineered wood products, which substitute for strong, clear-grained lumber historically obtained from logging older, large-diameter trees, have been developed to conserve lumber. Engineered wood products frequently require specialized connectors. Sales of Simpson Strong-Tie’s engineered wood connector products have increased significantly over the past several years.

Concerns about energy conservation and air quality have led to increasing recognition of the advantages of natural gas as a heating fuel, including its clean burning characteristics. Use of natural gas for home heating has been increasing in the United States over a number of years. Simpson Dura-Vent markets a line of products designed to vent natural gas burning appliances

The Company continues to develop its distribution through home centers throughout the United States. The Company’s sales to home centers increased significantly in 2003 and 2004, although sales were up only slightly in the fourth quarter of 2004. See “Item 7 – Management’s Discussion and Analysis of Financial Condition and Results of Operations.”

Business Strategy

The Company designs, manufactures and sells products that are of high quality and performance, easy to use and cost-effective for customers. The Company provides rapid delivery of its products and prompt engineering and sales support. Based on its communications with customers, engineers, architects, contractors and other industry participants, the Company believes that its products have strong brand name recognition, and the Company seeks to continue to develop the value of its brand names through a variety of customer-driven strategies. Information

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provided by customers has led to the development of many of the Company’s products, and the Company expects that customer needs will continue to shape the Company’s product development, marketing and services.

Specification in architects’ and engineers’ plans and drawings influences which products will be used for particular purposes and therefore is key to the use of the Company’s products in construction projects. The Company encourages architects and engineers to specify the installation of the Company’s products in projects they design and supervise, and encourages acceptance of the Company’s products by construction contractors. The Company maintains frequent contacts with architects, engineers and contractors, as well as private organizations that provide information to building code officials, both to inform them regarding the quality, proper installation, capabilities and value of the Company’s products and to update them about product modifications and new products that may be useful or necessary. The Company sponsors seminars to inform architects, engineers, contractors and building officials on appropriate use and proper installation of the Company’s products. Additionally, the Company maintains relationships with home builders throughout the country to promote the use of its products.

The Company seeks to expand its product and distribution coverage through several channels:

Distributors. The Company regularly evaluates its distribution coverage and service levels provided by its distributors and from time to time modifies its distribution strategy and implements changes to address weaknesses and opportunities. The Company has various programs to evaluate distributor product mix and conducts promotions to encourage distributors to add Company products that complement the mix of product offerings in their markets.

Through its efforts to increase specifications by architects and engineers, and through increasing the number of products sold to particular contractors, the Company seeks to increase sales to channels that serve building contractors. The Company continuously seeks to expand the number of contractors served by each distributor through such sales efforts as demonstrations of product cost-effectiveness and information programs.

Home Centers. The Company intends to continue to increase penetration of the DIY markets by solicitation of home centers. The Company’s Account Managers maintain on-going contact with home centers to work with them in a broad range of areas including inventory levels, retail display maintenance, and product knowledge training. To satisfy specialized requirements of the home center market, the Company has developed extensive bar coding and merchandising aids and has devoted a portion of its research efforts to the development of DIY products.

Dealers. In some markets, the Company sells its products directly to lumber dealers.

OEM Relationships. The Company works closely with manufacturers of engineered wood products and OEMs in developing and expanding the application and sales of Simpson Strong-Tie’s engineered wood connector products and Simpson Dura-Vent’s gas, wood and pellet stove venting products. SST has relationships with several of the largest manufacturers of engineered wood products, and SDV has OEM relationships with major fireplace and stove manufacturers.

While the Company is expanding its established facilities outside of California to increase its presence and sales in these markets, sales of some products may relate primarily to certain regions. For example, sales of SST’s line of shearwalls, which was expanded recently with the introduction of a steel wall, are concentrated in the western region of the United States since their use is primarily intended to resist the effects of seismic forces. Since 1993, the Company has established operations in the United Kingdom, opened warehouse and distribution facilities in western Canada and the northeastern United States, purchased anchor products manufacturers in Illinois and eastern Canada and connector product manufacturers in France, Denmark, Germany and western Canada and acquired the assets of a leading manufacturer and distributor of screw fastening systems and collated screws with manufacturing and distribution operations in Tennessee and distribution in Canada, Australia and New Zealand. The European investments are intended to establish a presence in the European Community through companies with existing customer bases and through servicing U.S.-based customers operating there. The Company also distributes connector and epoxy products in Chile, Mexico, Japan, Australia, China and New Zealand. The Company intends to continue to pursue and expand operations both inside and outside of the United States (see Note 14 to the Company’s Consolidated Financial Statements).

A Company goal is to manufacture and warehouse its products in geographic proximity to its markets to provide availability and rapid delivery of products to customers and prompt response to customer requests for specially designed products and services. With respect to the DIY and dealer markets, the Company’s strategy is to keep the customer’s retail stores continuously stocked with adequate supplies of the full line of the Company’s products that

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those stores carry. The Company manages its inventory to help assure continuous product availability. Most customer orders are filled within a few days. High levels of manufacturing automation and flexibility allow the Company to maintain its quality standards while continuing to provide prompt delivery.

The Company’s product research and development is based largely on needs that customers communicate to the Company. The Company typically has developed 10 to 20 new products annually (some of which may be produced in a range of sizes). The Company’s strategy is to develop new products on a proprietary basis, to patent them when appropriate and to seek trade secret protection for others.

The Company’s long-term strategy is to develop, acquire or invest in product lines or businesses that (a) complement the Company’s existing product lines, (b) can be marketed through its existing distribution channels, (c) might benefit from use of the Simpson Strong-Tie and Simpson Dura-Vent brand names, (d) are responsive to needs of the Company’s customers and (e) expand its markets geographically.

Simpson Strong-Tie

Overview

Connectors produced by Simpson Strong-Tie typically are steel devices that are used to strengthen, support and connect joints in residential and commercial construction and DIY projects. These products enhance the safety and durability of the structures in which they are installed and can save time and labor costs for the contractor. SST’s connector products increase structural integrity and improve structural resistance to seismic, wind and other forces. Applications range from building framing to deck construction to DIY projects. SST produces and markets over 5,000 standard and custom products.

In the United States, connector usage developed faster in the West than elsewhere due to the low cost and abundance of timber and to local construction practices. Increasingly, the market has been influenced both by a growing awareness that the devastation caused by seismic, wind and other disasters can be reduced through improved building codes and construction practices and by environmental concerns that contribute to the increasing cost and reduced availability of wood. Most Simpson Strong-Tie products are listed by recognized building standards agencies as complying with model building codes and are specified by architects and engineers for use in projects they are designing or supervising. The engineered wood products industry continues to develop in response to concerns about the availability of wood, and the Company believes that SST is the leading supplier of connectors for use with engineered wood products.

Metal connectors, anchors and fasteners will corrode and lose load carrying capacity when installed in corrosive environments or exposed to corrosive materials. There are many environments and materials that may cause corrosion, including ocean salt air, fire retardants, preservative-treated wood, dissimilar metals, fumes and fertilizers. The variables present in a single building environment make it impossible accurately to predict if, or when, significant corrosion will begin or reach a critical level. This relative uncertainty makes it crucial that the specifiers be knowledgeable of the potential risks and select a product coating or metal that is suitable for the intended use. Changes in the preservative-treated wood industry have created additional concerns. Effective December 31, 2003, the preservative-treated wood industry voluntarily transitioned from Chromated Copper Arsenate (“CCA-C”) used in residential applications to alternative treatments. Testing has shown that certain alternative replacement treatments are generally more corrosive than CCA-C. SST publishes technical bulletins on subjects such as this and others that affect the installation and use of its products and makes its technical bulletins available on its website at www.strongtie.com.

Products

Simpson Strong-Tie is a recognized brand name in the markets it serves. SST manufactures and markets products that strengthen the three types of connections typically found in residential and commercial construction:  wood-to-wood, wood-to-concrete and wood-to-masonry. The Company’s connector products, including its pre-fabricated shearwalls, are installed on the continuous load path from the foundation to the roof system. SST also markets specialty screws and nails for proper installation of certain of its connector products. These products have seismic, retrofit and remodeling applications for both new construction and DIY markets. Through its Anchor Systems product line, SST also offers a full line of adhesives, mechanical anchors and powder actuated tools for numerous anchoring applications in concrete, masonry and steel. With the addition of the Quik Drive product line, SST now also offers screw fastening systems and collated screws for various construction applications.

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Most of Simpson Strong-Tie’s products are listed by recognized model building code agencies. To achieve such listings, SST conducts extensive product testing, which is witnessed and certified by independent testing engineers. The tests also provide the basis for publication of load ratings for SST structural connectors, and this information is used by architects, engineers, contractors and homeowners. The information is useful across the range of applications of SST’s products, from the deck constructed by a homeowner to a multi-story structure designed by an architect or engineer in an earthquake zone.

Simpson Strong-Tie also manufactures connector products specifically designed for use with engineered wood products, such as wood I-joists. With increased timber costs and reduced availability of trees suitable for making traditional solid sawn lumber, construction with engineered wood products has increased substantially in the last several years. Over the same period, SST’s net sales of engineered wood connectors through dealer and contractor distributors and engineered wood product manufacturers have also increased significantly.

New Product Development

Simpson Strong-Tie commits substantial resources to engineering and new product development and the majority of its products have been developed through SST’s internal research and development program. SST typically has developed 10 to 20 new products each year. SST’s research and development expense for the three years ended December 31, 2004, 2003 and 2002, was $3,966,000, $3,599,000 and $3,199,000, respectively. In late 2002, SST completed construction of its advanced testing facility in Stockton, California, and testing of multi-story wall systems began there in 2003. As part of the new product development process, SST engineers, in cooperation with sales and marketing staff, meet regularly with architects, engineers, building inspectors, code officials and customers. Several new products derived from existing product lines are developed annually. SST developed and introduced a line of pre-fabricated steel shearwall products primarily for the new construction market and a new line of collated fasteners and fastener tools. SST also has expanded its line of chemical and mechanical anchor products and powder actuated tools. The Company believes that existing distribution channels are receptive to product line extensions, thereby enhancing SST’s ability to enter new markets.

Sales and Marketing

Simpson Strong-Tie’s sales and marketing programs are implemented through SST’s branch system. SST currently maintains branches in Northern and Southern California, Texas, Ohio, Canada, England, France and Denmark. Each branch is served by its own sales force, as well as manufacturing, warehouse and office facilities. Each branch is responsible for a broad geographic area. Branch managers have significant autonomy in managing their operations. Each is responsible for setting and executing sales and marketing strategies that are consistent with the markets that the branch serves and the goals of the Company. Each domestic branch is an independent profit center with cash profit sharing bonus and stock option programs based on its own performance. At the same time, the domestic branches closely integrate their manufacturing activities to enhance product availability. Branch sales forces in the U.S. are supported by marketing managers in the home office in Dublin, California. The home office also functions to coordinate issues effecting customers that operate in multiple regions. The sales force maintains close working relationships with customers, develops new business, calls on architects, engineers and building officials and participates in a range of educational seminars.

Simpson Strong-Tie sells its products through an extensive distribution system comprising dealer distributors supplying thousands of retail locations nationwide, contractor distributors, home centers, lumber dealers, manufacturers of engineered wood products, and specialized contractors such as roof framers. In recent years, sales to home centers have been one of the Company’s fastest growing distribution channels. A large part of that growth was sales to The Home Depot, which acquired White Cap Construction Supply, Inc., a contractor distributor, in 2004. Sales to The Home Depot exceeded 10% of the Company’s consolidated net sales in each of the last three years (see Note 14 to the Company’s Consolidated Financial Statements and “Item 7 – Management’s Discussion and Analysis of Financial Condition and Results of Operations”). The loss of this customer would have a material adverse effect on the Company. SST’s DIY and dealer products are used to build projects such as decks, patio covers and garage and organization systems.

Simpson Strong-Tie dedicates substantial resources to customer service. SST produces numerous publications and point-of-sale marketing aids to serve specifiers, distributors, retailers and users for the various markets that it serves. These publications include general catalogs, as well as various specific catalogs, such as those for its Anchor System products. The catalogs and publications describe the products and provide load and installation information. SST

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also maintains several linked websites centered on www.strongtie.com, which include catalogs, product and technical information, code reports and other general information related to SST’s product lines and promotional programs.

Simpson Strong-Tie’s engineers not only design and test products, but also provide engineering support for customers. This support might range from the discussion of a load value in a catalog to testing a unique application for an existing product. SST’s sales force communicates with customers in each of its marketing channels, through its publications, seminars and frequent calls.

Based on its communications with customers, Simpson Strong-Tie believes that its products are essential to its customers’ businesses, and it is SST’s policy to ship products within a few days of receiving the order. Many of SST’s customers serve contractors that require rapid delivery of needed products. Home centers and dealers also require superior service, because of fluctuating demand and to serve the needs of a broad base of customers. To satisfy these requirements, SST maintains high inventory levels, has redundant manufacturing capability and some multiple dies to produce the same parts. SST also maintains information systems that provide sales and inventory control and forecasting capabilities throughout its network of factories and warehouses. SST also has special programs for contractors intended to ensure the prompt manufacture and delivery of custom products.

Simpson Strong-Tie believes that dealer and home center sales of SST products are significantly greater when the bins and racks at large dealer and home center locations are adequately stocked with appropriate products. Various retailers carry varying numbers of SST products and SST’s Account Managers are engaged in ongoing efforts to inform retailers about SST’s merchandising programs and the appeal of the SST brand.

Simpson Dura-Vent

Overview

Simpson Dura-Vent’s venting systems are used to vent gas furnaces and water heaters, gas fireplaces and stoves, wood and oil burning appliances and pellet stoves. SDV’s metal vents, chimneys and chimney liner systems exhaust the products of combustion to the exterior of the building and have been designed for ease of assembly and safe operation and to achieve a high level of performance. SDV produces and markets nearly 2,400 different venting products.

The clean burning characteristics of natural gas have gained public recognition, resulting in increased market share for gas appliances in the new construction and the appliance replacement markets. As a result, Simpson Dura-Vent has developed venting systems, such as Direct-Vent, to address changes in appliance technology. Fluctuations in natural gas prices, however, affect demand for gas appliances. Historically, sales of wood and pellet burning stoves, considered alternative energy sources, have increased during periods of high oil and natural gas prices and energy shortages while sales of gas burning appliances have tended to decline.

Simpson Dura-Vent’s objective is to expand market share in all of its distribution channels, by entering expanding markets that address energy and environmental concerns. SDV’s strategy is to capitalize on its strengths in new product development and its established distribution network and to continue its commitment to high quality and service. SDV operates manufacturing and warehouse facilities in California and Mississippi.

Products

Simpson Dura-Vent is a leading supplier of double-wall Type B Gas Vent systems, used for venting gas furnaces, water heaters, boilers and decorative gas fireplaces. SDV’s Type B Gas Vent product line features heavy-duty quality construction and a twist-lock design that provides for fast and easy job-site assembly compared to conventional snap together designs. The twist-lock design has broader applications and has been incorporated into SDV’s gas, pellet and direct vent product lines. SDV also markets a patented flexible vent connector, Dura/Connect, for use between the gas appliance flue outlet and the connection to the Type B Gas Vent installed in the ceiling. Dura/Connect offers a simple twist, bend and connect installation for water heaters and gas furnaces.

Consumer concerns over the rising costs of natural gas and home heating oil in 2003 and 2004 increased demand for alternative fuel appliances. This has resulted in increased demand for SDV’s all-fuel chimney and pellet vent products. The gas fireplace market has evolved into two basic types of fireplace: top-vent fireplaces that are vented with the standard Type B Gas Vent and direct-vent fireplaces that use a special double-wall venting system. SDV’s direct-vent system is designed not only to exhaust the flue products, but also to draw in outside air for combustion,

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an important feature in modern energy-efficient home construction. The direct-vent gas fireplace systems provide ease of installation, permitting horizontal through-the-wall venting or standard vertical through-the-roof venting. SDV has established relationships with several large manufacturers of gas stoves and gas fireplaces to supply direct-vent venting products. In 1996, SDV expanded its direct-vent product line to include both co-axial and co-linear direct vent systems for venting gas stoves and gas inserts into existing masonry chimneys or existing factory-built metal chimneys.

New Product Development

Simpson Dura-Vent has gained industry recognition by offering innovative new products that meet changing needs of customers. SDV representatives serve on industry committees concerned with issues such as new appliance standards and government regulations. SDV’s research and development expense for the three years ended December 31, 2004, 2003 and 2002, was $518,000, $464,000 and $460,000, respectively. SDV also maintains working relationships with research and development departments of major appliance manufacturers, providing prototypes for field testing and conducting tests in SDV’s testing laboratory. SDV believes that such relationships provide competitive advantages. For example, SDV introduced the first direct vent system for direct vent gas appliances. In 2003, SDV developed stainless steel flexible relining systems for masonry chimneys. These systems are used to resize and retrofit masonry chimneys to accommodate wood burning and pellet burning fireplace inserts. In 1999, SDV introduced DuraTech, a twin-walled insulated chimney system for use on wood burning stoves, fireplaces and oil fired appliances. This product line has been designed and manufactured to a new standard of excellence. It is constructed from stainless steel and incorporates blanket insulation for enhanced safety and efficiency. In 2004, SDV completed testing for a new chimney product line, Dura-Plus HTC, which is designed to meet Canadian standards for chimney systems and will be marketed in Canada beginning in 2005.

Sales and Marketing

Simpson Dura-Vent’s sales and marketing programs are implemented through company sales and marketing staff and a network of independent manufacturer’s agents. SDV markets venting systems for both gas and wood burning appliances through wholesale distributors in the United States, Canada and Australia to the HVAC (heating, ventilating and air conditioning) and PHC (plumbing, heating and cooling) contractor markets, and to fireplace specialty shop distributors. These customers sell to contractor and DIY markets. SDV also markets venting products to home center and hardware store chains. SDV has established OEM relationships with several major gas fireplace and gas stove manufacturers, which SDV believes are leaders in the direct-vent gas appliance market (see “Item 7 - Management’s Discussion and Analysis of Financial Condition and Results of Operations”).

Simpson Dura-Vent responds to technological changes occurring in the industry through new product development and has developed a reputation for quality and service to its customers. To reinforce its reputation for quality, SDV produces extensive sales support literature and advertising materials. Recognizing the difficulty that customers and users may have in understanding new, complex venting requirements, SDV publishes a venting handbook to assist contractors, building officials and retail outlets with the science of proper venting. Advertising and promotional materials have been designed to be used by distributors and their customers, as well as home centers and hardware chains.

To enhance its marketing effort, SDV has developed a website, www.duravent.com, that includes product descriptions, catalogs and installation instructions, as well as a direct link to SDV’s customer service and engineering departments.

Manufacturing Process

The Company has concentrated on making its manufacturing processes as efficient as possible without compromising quality or flexibility necessary to serve the needs of its customers. The Company has developed and uses automated manufacturing processes. The Company’s innovative manufacturing systems and techniques have allowed it to control manufacturing costs, even while developing both new products and products that meet customized requirements and specifications. The Company’s development of specialized manufacturing processes also has permitted increased operating flexibility and enhanced product design innovation. The Company sources some products from third party vendors, both domestically and internationally.

The Company is committed to helping people build safer structures economically through the design, engineering and manufacturing of structural connectors, pre-fabricated shearwalls, anchors and related products. To this end, the

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Company has developed a quality management system that employs numerous quality-control procedures, such as computer-generated work orders, constant review of parts as they are produced and frequent quality testing (see “Item 7 – Management’s Discussion and Analysis of Financial Condition and Results of Operations”). Since 1996, Simpson Strong-Tie’s quality management system has been registered under ISO 9001, an internationally recognized set of quality-assurance standards. SST achieved registration under the new ISO 9001-2000 standard for its operations in North America and England in the first quarter of 2003. The Maple Ridge, B.C., and Stockton, California, locations achieved registration in 2004 and the Denmark location achieved registration in early 2005, joining 12 other locations in North America and England that were previously registered. In 2005, SST expects to achieve ISO 9001 registration for its operations in France and expects to begin the registration process for Quik Drive’s Gallatin, Tennessee facility. The Company believes that ISO registration is becoming increasingly important to U.S. companies.

Simpson Strong-Tie operates manufacturing and warehouse facilities in California, Texas, Ohio, Florida, Connecticut, Illinois, Washington, Tennessee, Nevada, British Columbia, Ontario, England, France, Denmark, Germany, Australia and Poland. SST also stocks its products in Scotland, Austria and Chile. Most of SST’s products are produced with a high level of automation, using progressive dies run in automatic presses making parts from coiled sheet steel at rates that often exceed 100 strokes per minute. SST estimates that it produces over one billion product pieces per year. Most of SST’s products (SKUs) are bar coded with UPC numbers for easy identification, and nearly all of the products sold to home centers are labeled with bar codes. SST has significant press capacity and has multiple dies for some of its high volume products because of the need to produce these products close to the customer and to provide backup capacity. The balance of production is accomplished through a combination of manual, blanking and numerically controlled (NC) processes which include robotic welders, lasers and turret punches. This capability allows SST to produce products with little redesign or set-up time, facilitating rapid turnaround for customers. New tooling is also highly automated. Dies are designed and produced using computer aided design (CAD) and computer aided machining (CAM) systems. CAD/CAM capability enables SST to create multiple dies rapidly and design them to high standards. The Company is constantly reviewing its product line to reduce manufacturing costs, increase automation, and take advantage of new types of materials. For example, in recent years SST has introduced multiple products made from an engineered composite plastic, the AnchorMate, the StrapMate and the Anchor Bolt Stabilizer.

Simpson Strong-Tie also manufactures chemical anchoring products at its facility in Addison, Illinois. The chemicals are mixed in batches and are then loaded in two-part dispensers. These dispensers mix the product on the job site since set up times are usually very short. In addition, SST purchases a number of products, primarily fasteners, powder actuated tools and accessories and certain of its mechanical anchoring products, from various sources around the world. These purchased products undergo inspections on a sample basis for conformance with ordered specifications and tolerances before being distributed.

Simpson Dura-Vent operates manufacturing and warehouse facilities in California and Mississippi. SDV produces component parts for venting systems using NC-controlled punch presses equipped with high-speed progressive and compound tooling. SDV’s vent pipe and elbow assembly lines are automated, to produce finished products efficiently from large coils of steel and aluminum. UPC bar coding and computer tracking systems provide SDV’s industrial engineers and production supervisors with real-time productivity tools to measure and evaluate current production rates, methods and equipment.

Most of the Company’s current and planned manufacturing facilities are located in geographic regions that have experienced major natural disasters, such as earthquakes, floods and hurricanes. For example, the 1989 Loma Prieta earthquake in Northern California destroyed a freeway and caused other major damage within a few miles of the Company’s facilities in San Leandro, California, and the earthquake in Northridge, California, in January 1994, destroyed several freeways and numerous buildings in the region in which the Company’s facilities in Brea are located. The Company has developed a disaster recovery plan, but it does not carry earthquake insurance on its buildings or its equipment. Other insurance that it carries is limited and not likely to be adequate to cover all of the Company’s resulting costs, business interruption and lost profits in the event of a major natural disaster in the future. If a natural disaster were to render one or more of the Company’s manufacturing facilities totally or partially unusable, whether or not covered by insurance, the Company’s business and financial condition could be materially and adversely affected.

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Regulation

The design, capacity and quality of most of the Company’s products and manufacturing processes are subject to numerous and extensive regulations and standards promulgated by governmental, quasi-governmental and industry organizations. Such regulations and standards are highly technical and complex and are subject to frequent revision. The failure of the Company’s products or manufacturing processes to comply with any of such regulations and standards could impair the Company’s ability to manufacture and market its products profitably and could materially and adversely affect the Company’s business and financial condition.

Simpson Strong-Tie’s product lines are subject to federal, state, county, municipal and other governmental and quasi-governmental regulations that affect product design, development, testing, applications, marketing, sales, installation and use. Most SST products are recognized by building code and standards agencies. Agencies that recognize Company products include the International Code Council (ICC), the City of Los Angeles, the State of Florida, the State of Wisconsin, and the California Division of the State Architect. These and other code agencies adopt various testing and design standards and incorporate them into their related building codes. With the adoption of the International Residential Code (2000 and 2003) and the International Building Code (2000 and 2003), these standards have become more uniformly applied and are recognized throughout most of the country. SST considers code recognition to be a significant marketing tool and devotes considerable effort to obtaining and maintaining appropriate approvals for its products. SST believes that architects, engineers, contractors and other customers are less likely to purchase structural products that lack the appropriate code acceptance if code-accepted competitive products are available. SST actively participates in industry related professional associations to keep abreast of regulatory changes and to provide information to regulatory agencies.

Simpson Dura-Vent operates under a complex regulatory environment that includes appliance and venting performance standards related to safety, energy efficiency and air quality. Gas venting regulations are contained in the National Fuel Gas Code (“NFGC”), while safety and performance regulations for wood burning appliances and chimney systems are contained in a National Fire Protection Association standard (“NFPA 211”). Standards for testing gas vents and chimneys are developed by testing laboratories such as Underwriter’s Laboratories (“UL”) in compliance with the American National Standards Institute. Clean air standards for both gas and wood burning appliances are regulated by the Environmental Protection Agency (“EPA”). Energy efficiency standards are regulated by the Department of Energy (“DOE”) under the authority of the National Appliance Energy Conservation Act. Under this act, the DOE periodically reviews the necessity for increased efficiency standards with respect to gas furnaces and gas water heaters. A substantial percentage of SDV’s Type B Gas Vent sales are for gas furnaces and gas water heaters. Minimum appliance efficiency standards are being considered that could negatively affect sales of Type B Gas Vents, which could materially and adversely affect the Company’s operating results and financial condition if the standards and regulations contained in the NFGC and NFPA 211 are ultimately adopted by national building code organizations such as International Code Council (ICC). In turn, the various building codes could be adopted by local municipalities, resulting in enforcement through the building permit process. Safety, air quality and energy efficiency requirements are enforced by local air quality districts and municipalities by requiring proper UL, EPA and DOE labels on appliances and venting systems.

Competition

The Company faces a variety of competition in all of the markets in which it participates. This competition ranges from subsidiaries of large national or international corporations to small regional manufacturers. While price is an important factor, the Company competes on the basis of quality, breadth of product line, technical support, service, field support and product innovation. As a result of differences in structural design and building practices and codes, Simpson Strong-Tie’s markets tend to differ by region. Within these regions, SST competes with companies of varying size, several of which also distribute their products nationally.

The venting industry is highly competitive. SDV’s competitors include a variety of manufacturers that have operations in USA, Canada and Mexico. Most of its competitors don’t compete in all of SDV’s product lines, and some have additional product lines which SDV does not offer. SDV competes on the basis of quality, service, breadth of product line, technical support, and product innovation.

Raw Materials

The principal raw material used by the Company is steel, including stainless steel, and is generally ordered to specific American Society of Testing and Materials (“ASTM”) standards.  SST also uses materials such

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as epoxies and acrylics in the manufacture of it chemical anchoring products. Raw materials such as aluminum, aluminum alloys and ceramic and other insulation materials, are used by Simpson Dura-Vent, and cartons, which are used by both SST and SDV. The Company purchases raw materials from a variety of commercial sources. The Company’s practice is to seek cost savings and enhanced quality by purchasing from a limited number of suppliers.

The steel industry is highly cyclical and prices for the Company’s raw materials are influenced by numerous factors beyond the Company’s control, including general economic conditions, competition, labor costs, import duties and other trade restrictions. Steel prices rose in the latter half of 2003 and in 2004. Steel prices may have reached a temporary plateau at their current level but may go higher in the future. Several factors have contributed to these price increases. The domestic market continues to be heavily influenced by three major U.S. manufacturers. The world market for steel continues to be strong and the value of the dollar remains low. All of these factors could have an adverse effect on the Company’s cost and availability of steel in 2005. The Company might not be able to increase its product prices to correspond to increases in raw materials prices without materially and adversely affecting its sales and profits. See “Item 7 – Management’s Discussion and Analysis of Financial Condition and Results of Operations.” The Company historically has not attempted to hedge against changes in prices of steel or other raw materials.

Patents and Proprietary Rights

The Company’s subsidiaries have U.S. and foreign patents, the majority of which cover products that they currently manufacture and market. These patents, and applications for new patents, cover various design aspects of the subsidiaries’ products, as well as processes used in their manufacture. The Company’s subsidiaries are continuing to develop new potentially patentable products, product enhancements and product designs. Although the Company’s subsidiaries do not intend to apply for additional foreign patents covering existing products, the Company has developed an international patent program to protect new products that its subsidiaries may develop.

The Company’s ability to compete effectively with other companies depends in part on its ability to maintain the proprietary nature of its technology. There can be no assurance, however, as to the degree of protection afforded by these patents or the likelihood that patents will be issued pursuant to pending patent applications. Furthermore, there can be no assurance that others will not independently develop the same or similar technology, develop around the patented aspects of any of the Company’s products or proposed products, or otherwise obtain access to the Company’s proprietary technology.

In addition to seeking patent protection, the Company relies on unpatented proprietary technology to maintain its competitive position. Nevertheless, there can be no assurance that the Company will be able to protect its know-how or other proprietary information.

In attempting to protect its proprietary information, the Company expects that it may sometimes be necessary to initiate lawsuits against competitors and others that the Company believes have infringed or are infringing the Company’s rights. In such an event, the defendant may assert counterclaims to complicate or delay the litigation or for other reasons. If the Company were to be unable to maintain the proprietary nature of its significant products, the Company’s business and financial condition could be materially and adversely affected.

Acquisitions and Expansion into New Markets

The Company’s future growth, if any, may depend to some extent on its ability to penetrate new markets, both domestically and internationally. See “Industry and Market Trends” and “Business Strategy.” Therefore, the Company may in the future pursue acquisitions of product lines or businesses. Acquisitions involve numerous risks, including difficulties in the assimilation of the operations and products of the acquired companies, the diversion of management’s attention from other business concerns, risks of entering markets in which the Company has little or no direct prior experience, and the potential loss of key employees of the acquired company. In addition, future acquisitions by the Company may result in potentially dilutive issuances of equity securities, the incurring of additional debt, and impairment and amortization expenses related to goodwill and other intangible assets, all of which could adversely affect the Company’s profitability. If an acquisition occurs, no assurance can be given as to its effect on the Company’s business or operating results. See “Item 7 – Management’s Discussion and Analysis of Financial Condition and Results of Operations.”

Construction customs, standards, techniques and methods in international markets differ from those in the United States. Laws and regulations applicable in new markets for the Company may be unfamiliar to the Company and

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compliance may be substantially more costly than the Company anticipates. As a result, it may become necessary for the Company to redesign products or to invent or design new products in order to compete effectively and profitably outside the United States or in markets that are new to the Company in the United States. The Company expects that significant time will be required for it to generate substantial sales or profits in new markets.

Other significant challenges to conducting business in foreign countries include, among other factors, local acceptance of the Company’s products, political instability, currency controls, changes in import and export regulations, changes in tariff and freight rates, and fluctuations in foreign exchange rates. There can be no assurance that the Company will be able to penetrate these markets or that any such market penetration can be achieved on a timely basis or profitably. If the Company is not successful in penetrating these markets within a reasonable time, it will be unable to recoup part or all of the significant investments it will have made in attempting to do so. See “Business Strategy” and “Industry and Market Trends.”

In October 2004, the Company completed the acquisition of the assets of Quik Drive, U.S.A., Inc. and Quik Drive Canada, Inc. and 100% of the equity of Quik Drive Australia Pty. Limited (collectively “Quik Drive”). Quik Drive manufactures collated fasteners and fastener delivery systems which are marketed in the U.S., Canada, Australia and New Zealand. The purchase price, including post-closing adjustments, of the acquisition was approximately $32.0 million in cash and $5.0 million in stock (which was not and will not be registered under the Securities Act of 1933 and may not be offered or sold in the United States absent registration or an applicable exemption from registration requirements). In April 2004, the Company’s Danish subsidiary acquired 100% of the shares of ATF Furrer Holz GmbH (“ATF”), in Switzerland, for approximately $0.6 million. ATF distributes a line of hidden connectors in some European countries. In May 2003, Simpson Strong-Tie Canada Limited, a subsidiary of the Company, purchased MGA Construction Hardware & Steel Fabricating Limited and MGA Connectors Limited (collectively, “MGA”), for approximately $9.8 million in cash. MGA manufactures and distributes throughout Canada and portions of the United States a quality line of connectors used in construction.

Seasonality and Cyclicality

The Company’s sales are seasonal, with operating results varying from quarter to quarter. With some exceptions, the Company’s sales and income have historically been lower in the first and fourth quarters and higher in the second and third quarters of the year, as retailers and contractors purchase construction materials in the late spring and summer months for the construction season. In addition, demand for the Company’s products and the Company’s results of operations are significantly affected by weather conditions, such as unseasonably warm, cold or wet weather, which affect, and sometimes delay or accelerate, installation of certain of the Company’s products. Political and economic events can also affect the Company’s revenues. The Company has little control over the timing of customer purchases, and sales anticipated in one quarter may occur in another quarter, thereby affecting both quarters’ results. In addition, the Company incurs significant expenses as it develops, produces and markets its products in anticipation of future orders. Because the Company maintains high inventory levels, products typically are shipped as orders are received, and accordingly the Company generally operates with little backlog. As a result, net sales in any quarter generally depend on orders booked and shipped in that quarter. A significant portion of the Company’s operating expenses are fixed, and planned expenditures are based primarily on sales forecasts. If sales fall below the Company’s expectations, operating results would be adversely affected for the relevant quarters, as expenses based on those expectations will already have been incurred. See “Item 7 – Management’s Discussion and Analysis of Financial Condition and Results of Operations.”

The Company’s principal markets are in the building construction industry. That industry is subject to significant volatility as a result of fluctuations in interest rates, the availability of credit to builders and developers, inflation rates, weather and other factors and trends, none of which is within the Company’s control. Declines in commercial and residential construction may be expected to reduce the demand for the Company’s products. The Company cannot provide any assurance that its business will not be adversely affected by future negative economic or construction industry performance or that future declines in construction activity or the demand for the Company’s products will not have material adverse effects on the Company and its business and financial condition. See “Item 7 – Management’s Discussion and Analysis of Financial Condition and Results of Operations.”

Product Liability

The Company designs and manufactures most of its standard products and expects that it will continue to do so. The Company employs engineers and designers to design and test its products under development. In addition, the Company maintains a quality control system. The Company has on occasion found manufacturing flaws in its

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products. In addition, the Company purchases from third party suppliers raw materials, principally steel, and finished goods that are produced and processed by other manufacturers. The Company also has on occasion found flaws in raw materials and finished goods produced by others. Some flaws have not become apparent until after the products were installed by customers. Many of the Company’s products are integral to the structural soundness or fire safety of the structures in which they are used. As a result, if any flaws exist in the Company’s products (as a result of design, raw material or manufacturing flaws or lapses in product quality control) and such flaws are not discovered and corrected before the Company’s products are incorporated into structures, the structures could suffer severe damage (such as collapse or fire) and personal injury could result. To the extent that such damage or injury is not covered by the Company’s product liability insurance, and if the Company were to be found to have been negligent or otherwise culpable, the Company and its business and financial condition could be materially and adversely affected by the necessity to correct such damage and to compensate persons who might have suffered injury. Furthermore, in the event that a flaw is discovered after installation but before any damage or injury occurs, it may be necessary for the Company to recall products, and the Company may be liable for any costs necessary to retrofit the affected structures. Any such recall or retrofit could entail substantial costs and adversely affect the Company’s reputation, sales and financial condition. The Company does not carry insurance against recall costs, and its product liability insurance may not cover retrofit costs.

No assurance can be given that claims will not be made against the Company with regard to damage or destruction of structures incorporating Company products resulting from a natural disaster. Any such claims, if asserted, could materially and adversely affect the Company.

Environmental, Health and Safety Matters

The Company is subject to environmental laws and regulations governing emissions into the air, discharges into water, and generation, handling, storage, transportation, treatment and disposal of waste materials. The Company is also subject to other federal and state laws and regulations regarding health and safety matters. The Company’s manufacturing operations involve the use of solvents, chemicals, oils and other materials that are regarded as hazardous or toxic and the use of complex and heavy machinery and equipment that can pose severe safety hazards (especially if not properly and carefully used). Some of the Company’s products also incorporate materials that are hazardous or toxic in some forms, such as zinc and lead, which are used in some steel galvanizing processes, explosives, such as the gun powder used in its powder actuated tools, and certain of the chemicals used in the manufacture of SST’s acrylic and epoxy anchoring products. The Company believes that it has obtained all material licenses and permits required by environmental, health and safety laws and regulations in connection with the Company’s operations and that its policies and procedures comply in all material respects with existing environmental, health and safety laws and regulations. It is possible that additional licenses or permits may be required, that the Company’s policies and procedures might not comply in all respects with all such laws and regulations or, even if they do, that employees might fail or neglect to follow them in all respects, and that the Company’s generation, handling, use, storage, transportation, treatment or disposal of hazardous or toxic materials, machinery and equipment might cause injury to persons or to the environment. In addition, properties occupied by the Company may be contaminated by hazardous or toxic substances and remedial action may be required at some time in the future. It is also possible that materials in certain of the Company’s products could cause injury or sickness. Relevant laws and regulations could also be changed or new ones could be adopted that require the Company to obtain additional licenses and permits and cause the Company to incur substantial expense. Any such event or contamination could have a material adverse effect on the Company and its liquidity, results of operations and financial condition. See “Regulation.”

Employees and Labor Relations

As of January 1, 2005, the Company had 2,609 full-time employees, of whom 1,756 were hourly employees and 853 were salaried employees. The Company believes that its overall compensation and benefits for the most part exceed industry averages and that its relations with its employees are good.

The Company is dependent on certain key management and technical personnel, including Thomas J Fitzmyers, Michael J. Herbert, Stephen B. Lamson, Barclay Simpson and Stephen P. Eberhard. The loss of one or more key employees could have a material adverse effect on the Company. The Company’s success will also depend on its ability to attract and retain additional highly qualified technical, marketing and management personnel necessary for the maintenance and expansion of the Company’s activities. The Company faces strong competition for such personnel and there can be no assurance that the Company will be able to attract or retain such personnel.

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A significant number of the employees at three of the Company’s manufacturing facilities are represented by labor unions and are covered by collective bargaining agreements. Two of the Company’s collective bargaining agreements cover the Company’s sheetmetal and maintenance workers and its tool and die craftsmen in Brea. These two contracts expire in June 2007 and February 2008, respectively. Two other contracts, covering tool and die personnel and sheetmetal workers in San Leandro, expire in June 2007. Simpson Strong-Tie’s Stockton, California, facility is also a union facility. The collective bargaining agreements at this facility expire in September 2007. A work stoppage or interruption by a significant number of the Company’s employees could have a material and adverse effect on the Company and its business and financial condition.

Available Information

The SEC also maintains an internet site (hrrp://www.sec.gov) that contains reports, proxy and information statements, and other information regarding issuers that file electronically with the SEC. The Company makes available, free of charge, copies of its recent annual reports on Form 10-K, quarterly reports on Form 10-Q, current reports on Form 8-K, corporate governance guidelines and code of ethics and the charters of the Audit, Compensation, and Governance and Nominating Committees of its Board of Directors on its website at www.simpsonmfg.com. Printed copies of any of these materials will be provided on request.

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