RISK FACTORS

           Investing in our common stock involves a substantial risk of loss. You should carefully consider these risk factors, together with all of the other information included in this prospectus, before you decide to purchase shares of our common stock. If any of the following risks occur, it could have a material adverse effect on our business, financial condition or results of operations. In that case, the trading price of our common stock could decline, and you could lose part or all of your investment. Some statements in this prospectus, including statements in the following risk factors, constitute forward-looking statements. See the section of this prospectus captioned "Special Note Regarding Forward-Looking Statements and Market Data."

Risks Related to Our Business and Our Industry

We have a history of losses which may continue in the future, and we cannot be certain that we will achieve or sustain profitability.

          We incurred net losses of $28.2 million and $21.4 million for fiscal 2013 and 2014, respectively. We expect to incur additional costs and expenses related to the continued development and expansion of our business, including in connection with marketing and developing our products, expanding into new product markets and geographies, maintaining and enhancing our research and development operations and hiring additional personnel. In addition, as a public company, we will incur significant additional legal, accounting and other expenses that we did not incur as a private company. We do not know whether our revenues will grow rapidly enough to absorb these costs, and our limited operating history makes it difficult to assess the extent of these expenses or their impact on our results of operations.

          Further, revenue growth may slow or revenue may decline for a number of possible reasons, many of which are outside our control, including a decline in demand for our products, increased competition, a decrease in the growth of the solar industry or our market share, or our failure to continue to capitalize on growth opportunities. If we fail to generate sufficient revenue to support our operations, we may not be able to achieve or sustain profitability.

Our limited operating history makes it difficult to evaluate our current business and future prospects.

          We have only been in existence since 2006 and our first full fiscal year of commercial shipments was 2011. Much of our growth has occurred in recent periods. Our limited operating history, combined with the rapidly evolving and competitive nature of our industry, makes it difficult to evaluate our current business and future prospects. In addition, we have limited insight into emerging trends that may adversely affect our business, financial condition, results of operations and prospects. We have encountered and will continue to encounter risks and difficulties frequently experienced by growing companies in rapidly changing industries, including unpredictable and volatile revenues and increased expenses as we continue to grow our business. The viability and demand for solar energy solutions, and in turn, our products, may be affected by many factors outside of our control, including:

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cost competitiveness, reliability and performance of solar photovoltaic ("PV") systems compared to conventional and non-solar renewable energy sources and products;



•

availability and amount of government subsidies and incentives to support the development and deployment of solar energy solutions;



•

the extent to which the electric power industry and broader energy industries are deregulated to permit broader adoption of solar electricity generation;

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•

prices of traditional carbon-based energy sources;



•

levels of investment by end-users of solar energy products, which tend to decrease when economic growth slows; and



•

the emergence, continuance or success of, or increased government support for, other alternative energy generation technologies and products.

          If we do not manage these risks and overcome these difficulties successfully, our business will suffer.

If demand for solar energy solutions does not continue to grow or grows at a slower rate than we anticipate, our business will suffer.

          Our solution is utilized in solar PV installations. As a result, our future success depends on continued demand for solar energy solutions and the ability of solar equipment vendors to meet this demand. The solar industry is an evolving industry that has experienced substantial changes in recent years, and we cannot be certain that consumers and businesses, with respect to distributed solar solutions, or utilities, with respect to utility-scale solar projects, will adopt solar PV systems as an alternative energy source at levels sufficient to grow our business. If demand for solar energy solutions fails to develop sufficiently, demand for our products will decrease, which would have an adverse impact on our ability to increase our revenue and grow our business.

The reduction, elimination or expiration of government subsidies and economic incentives for on-grid solar electricity applications could reduce demand for solar PV systems and harm our business.

          Federal, state, local and foreign government bodies provide incentives to owners, end users, distributors, system integrators and manufacturers of solar PV systems to promote solar electricity in the form of rebates, tax credits and other financial incentives such as system performance payments, payments of renewable energy credits associated with renewable energy generation and exclusion of solar PV systems from property tax assessments. The market for on-grid applications, where solar power is used to supplement a customer's electricity purchased from the utility network or sold to a utility under tariff, often depends in large part on the availability and size of government and economic incentives that vary by geographic market. Because our customers' sales are typically into the on-grid market, the reduction, elimination or expiration of government subsidies and economic incentives for on-grid solar electricity may negatively affect the competitiveness of solar electricity relative to conventional and non-solar renewable sources of electricity, and could harm or halt the growth of the solar electricity industry and our business. These subsidies and incentives may expire on a particular date, end when the allocated funding is exhausted or be reduced or terminated as solar energy adoption rates increase or as a result of legal challenges, the adoption of new statutes or regulations or the passage of time. These reductions or terminations often occur without warning. For example, in January 2013, the Arizona Corporation Commission, which oversees local utility rates and renewable energy programs in Arizona, announced suddenly that it would drastically reduce residential purchase incentives and eliminate commercial production incentives.

          In addition, several jurisdictions have adopted renewable portfolio standards, which mandate that a certain portion of electricity delivered by utilities to customers come from a set of eligible renewable energy resources by a certain compliance date. Some programs further specify that a portion of the renewable energy quota must be from solar electricity. Under some programs, a utility can receive a "credit" for renewable energy produced by a third party by either purchasing the electricity directly from the producer or paying a fee to obtain the right to renewable energy generated but used by the generator or sold to another party. A renewable energy credit allows the

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utility to add this electricity to its renewable portfolio requirement total without actually expending the capital for generating facilities. However, there can be no assurances that such policies will continue. For example, in May 2014, Ohio froze renewable portfolio requirements at current levels. Proposals to extend compliance deadlines, reduce targets or repeal standards have also been introduced in a number of states including California and Colorado. Reduction or elimination of renewable portfolio standards or successful efforts to meet current standards could harm or halt the growth of the solar PV industry and our business.

Changes to net metering policies may significantly reduce demand for electricity from solar PV systems and harm our business.

          Our business benefits from favorable net metering policies in several U.S. states, Canadian provinces and European countries in which our customers operate. Net metering allows a solar PV system owner to pay his or her local electric utility only for power usage net of production from the solar PV system, transforming the conventional relationship between customers and traditional utilities. System owners receive credit for the energy that the solar installation generates to offset energy usage at times when the solar installation is not generating energy. Under a net metering program, the customer typically pays for the net energy used or receives a credit against future bills at the retail rate if more energy is produced than consumed. In some locations, customers are also reimbursed by the electric utility for net excess generation on a periodic basis.

          Most U.S. states have adopted some form of net metering. However, net metering programs have recently come under regulatory scrutiny in some U.S. states due to challenges alleging that net metering policies inequitably shift costs onto non-solar ratepayers by allowing solar ratepayers to sell electricity at rates that are too high for utilities to recoup their fixed costs. Generally, the programs have been upheld in their current form, though some were subject to minor modification and others, including California, have been designated for additional regulatory review in the next few years. We cannot assure you that the programs will not be significantly modified following these reviews.

          If the value of the credit that customers receive for net metering is significantly reduced, end-users may be unable to recognize the same level of cost savings associated with net metering that current end-users enjoy. The absence of favorable net metering policies or of net metering entirely, or the imposition of new charges that only or disproportionately affect end-users that use net metering would significantly limit demand for solar PV systems that are sold by our customers and could have a material adverse effect on our business, financial condition, results of operations and future growth.

Existing electric utility industry regulations, and changes to regulations, may present technical, regulatory and economic barriers to the purchase and use of solar PV systems that may significantly reduce demand for our products or harm our ability to compete.

          Federal, state, local and foreign government regulations and policies concerning the electric utility industry, and internal policies and regulations promulgated by electric utilities, heavily influence the market for electricity generation products and services. These regulations and policies often relate to electricity pricing and the interconnection of customer-owned electricity generation, and governments and utilities continuously modify these regulations and policies. These regulations and policies could deter purchases of renewable energy products, including solar PV systems sold by our customers. This could result in a significant reduction in the potential demand for our products. For example, utilities commonly charge fees to larger, industrial customers for disconnecting from the electric grid or for having the capacity to use power from the electric grid for back-up purposes. These fees could increase the cost to use solar PV systems sold by our customers and make them less desirable, thereby harming our business, prospects, financial

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condition and results of operations. In addition, depending on the region, electricity generated by solar PV systems competes most effectively with expensive peak-hour electricity from the electric grid, rather than the less expensive average price of electricity. Modifications to the utilities' peak hour pricing policies or rate design, such as to a flat rate, could require the price of solar PV systems and their component parts to be lower in order to compete with the price of electricity from the electric grid.

          Changes in current laws or regulations applicable to us or the imposition of new laws and regulations in the U.S., Europe or other jurisdictions in which we do business could have a material adverse effect on our business, financial condition and results of operations. Any changes to government or internal utility regulations and policies that favor electric utilities could reduce the competitiveness of solar PV systems sold by our customers and cause a significant reduction in demand for our products and services. For example, regulators in certain U.S. states have been asked to consider proposals to assess fees on consumers purchasing energy from solar PV systems or imposing a new charge that would disproportionately impact solar PV system owners who utilize net metering, either of which would increase the cost of solar PV energy to those consumers and could reduce demand for our products. Any similar government or utility policies adopted in the future that discourage the growth of solar PV systems could reduce demand for our products and services and adversely impact our growth. In addition, changes in our products or changes in export and import laws and implementing regulations may create delays in the introduction of new products in international markets, prevent our customers from deploying our products internationally or, in some cases, prevent the export or import of our products to certain countries altogether. Any such event could have a material adverse effect on our business, financial condition and results of operations.

A drop in the retail price of electricity derived from the utility grid or from alternative energy sources may harm our business, financial condition, results of operations and prospects.

          Decreases in the retail prices of electricity from the utility grid would make the purchase of solar PV systems less economically attractive and would likely lower sales of our products. The price of electricity derived from the utility grid could decrease as a result of:

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construction of a significant number of new power generation plants, including plants utilizing natural gas, nuclear, coal, renewable energy or other generation technologies;



•

relief of transmission constraints that enable local centers to generate energy less expensively;



•

reductions in the price of natural gas;



•

utility rate adjustment and customer class cost reallocation;



•

energy conservation technologies and public initiatives to reduce electricity consumption;



•

development of smart-grid technologies that lower the peak energy requirements of a utility generation facility;



•

development of new or lower-cost energy storage technologies that have the ability to reduce a customer's average cost of electricity by shifting load to off-peak times; and



•

development of new energy generation technologies that provide less expensive energy.

          Moreover, technological developments in the solar components industry could allow our competitors and their customers to offer electricity at costs lower than those that can be achieved by us and our customers, which could result in reduced demand for our products.

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          If the cost of electricity generated by solar PV installations incorporating our systems is high relative to the cost of electricity from other sources, our business, financial condition and results of operations may be harmed.

An increase in interest rates or tightening of the supply of capital in the global financial markets could make it difficult for customers to finance the cost of a solar PV system and could reduce the demand for our products.

          Many end-users depend on financing to fund the initial capital expenditure required to develop, build or purchase a solar PV system. As a result, an increase in interest rates, or a reduction in the supply of project debt financing or tax equity investments, could reduce the number of solar projects that receive financing or otherwise make it difficult for our customers or their customers to secure the financing necessary to develop, build, purchase or install a solar PV system on favorable terms, or at all, and thus lower demand for our products which could limit our growth or reduce our net sales. In addition, we believe that a significant percentage of end-users install solar PV systems as an investment, funding the initial capital expenditure through financing. An increase in interest rates could lower an investor's return on investment on a solar PV system, increase equity return requirements or make alternative investments more attractive relative to solar PV systems, and, in each case, could cause these end-users to seek alternative investments.

The market for our products is highly competitive and we expect to face increased competition as new and existing competitors introduce power optimizer, inverter and solar PV system monitoring products, which could negatively affect our results of operations and market share.

          The market for solar PV solutions is highly competitive. We principally compete with traditional inverter manufacturers as well as microinverter manufacturers. Currently, our DC optimized inverter system competes with products from traditional inverter manufacturers, such as SMA Solar Technology AG, ABB Ltd. (previously Power-One Inc.) and KACO new energy GmbH, and microinverter manufacturers, such as Enphase Energy, Inc., as well as emerging technology companies offering alternative optimizer, microinverter or other MLPE products. SMA Solar Technology AG and ABB Ltd. have recently introduced or announced plans to introduce microinverter products. In addition, several new entrants to the MLPE market, including low-cost Asian manufacturers, have recently announced plans to ship or have already shipped products in markets in which we sell our products. We expect competition to intensify as new and existing competitors enter the MLPE market.

          Several of our existing and potential competitors are significantly larger, have greater financial, marketing, distribution, customer support and other resources, are longer established, and have better brand recognition. Further, certain competitors may be able to develop new products more quickly than us, may partner with other competitors to provide combined technologies and competing solutions and may be able to develop products that are more reliable or that provide more functionality than ours. In addition, some of our competitors have the financial resources to offer competitive products at aggressive or below-market pricing levels, which could cause us to lose sales or market share or require us to lower prices for our products in order to compete effectively. If we have to reduce our prices by more than we anticipated, or if we are unable to offset any future reductions in our average selling prices by increasing our sales volume, reducing our costs and expenses or introducing new products, our revenues and gross profit would suffer.

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Developments in alternative technologies or improvements in distributed solar energy generation may have a material adverse effect on demand for our offerings.

          Significant developments in alternative technologies, such as advances in other forms of distributed solar PV power generation, storage solutions such as batteries, the widespread use or adoption of fuel cells for residential or commercial properties or improvements in other forms of centralized power production may have a material adverse effect on our business and prospects. Any failure by us to adopt new or enhanced technologies or processes, or to react to changes in existing technologies, could result in product obsolescence, the loss of competitiveness of our products, decreased revenue and a loss of market share to competitors.

Our industry has historically been cyclical and experienced periodic downturns.

          Our future success partly depends on continued demand for solar PV systems in the end-markets we serve, including the residential and commercial sectors in the United States and Europe. The solar industry has historically been cyclical and has experienced periodic downturns which may affect the demand for equipment that we manufacture. The solar industry has undergone challenging business conditions in recent years, including downward pricing pressure for PV modules, mainly as a result of overproduction, and reductions in applicable governmental subsidies, contributing to demand decreases. Although the solar industry is experiencing a slow recovery, there is no assurance that the solar industry will not suffer significant downturns in the future, which will adversely affect demand for our solar products and our results of operations.

Defects or performance problems in our products could result in loss of customers, reputational damage and decreased revenue, and we may face warranty, indemnity and product liability claims arising from defective products.

          Although our products meet our stringent quality requirements, they may contain undetected errors or defects, especially when first introduced or when new generations are released. Errors, defects or poor performance can arise due to design flaws, defects in raw materials or components or manufacturing difficulties, which can affect both the quality and the yield of the product. Any actual or perceived errors, defects or poor performance in our products could result in the replacement or recall of our products, shipment delays, rejection of our products, damage to our reputation, lost revenue, diversion of our engineering personnel from our product development efforts and increases in customer service and support costs, all of which could have a material adverse effect on our business, financial condition and results of operations.

          Furthermore, defective components may give rise to warranty, indemnity or product liability claims against us that exceed any revenue or profit we receive from the affected products. We offer a minimum 12-year limited warranty for our inverters and a 25-year limited warranty for our power optimizers. Our limited warranties cover defects in materials and workmanship of our products under normal use and service conditions. As a result, we bear the risk of warranty claims long after we have sold products and recognized revenue. While we do have accrued reserves for warranty claims, our estimated warranty costs for previously sold products may change to the extent future products are not compatible with earlier generation products under warranty. Our warranty accruals are based on our assumptions and we do not have a long history of making such assumptions. As a result, these assumptions could prove to be materially different from the actual performance of our systems, causing us to incur substantial unanticipated expense to repair or replace defective products in the future or to compensate customers for defective products. Our failure to accurately predict future claims could result in unexpected volatility in, and have a material adverse effect on, our financial condition.

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          If one of our products were to cause injury to someone or cause property damage, including as a result of product malfunctions, defects or improper installation, then we could be exposed to product liability claims. We could incur significant costs and liabilities if we are sued and if damages are awarded against us. Further, any product liability claim we face could be expensive to defend and could divert management's attention. The successful assertion of a product liability claim against us could result in potentially significant monetary damages, penalties or fines, subject us to adverse publicity, damage our reputation and competitive position and adversely affect sales of our products. In addition, product liability claims, injuries, defects or other problems experienced by other companies in the residential solar industry could lead to unfavorable market conditions for the industry as a whole, and may have an adverse effect on our ability to attract new customers, thus harming our growth and financial performance.

If we do not forecast demand for our products accurately, we may experience product shortages, delays in product shipment, excess product inventory, or difficulties in planning expenses, which will adversely affect our business and financial condition.

          Our products are manufactured according to our estimates of customer demand, which requires us to make multiple forecasts and assumptions relating to demand from solar PV installers and distributors, their end customers and general market conditions. Because we sell a large portion of our products to larger solar installers and various distributors, who in turn sell to local installers, who in turn sell to their end customers, the system owner, we have limited visibility as to end customer demand and it is difficult to forecast future end-user demand to plan our operations. If we overestimate demand for our products, or if purchase orders are cancelled or shipments are delayed, we may have excess inventory that we cannot sell. Conversely, if we underestimate demand, we may not have sufficient inventory to meet end customer demand or to ramp up production at our contract manufacturers in a timely manner, or we could incur additional costs, lose market share, damage relationships with our distributors and end customers and forego potential revenue opportunities. For example, in fiscal 2014, unexpectedly high customer demand forced us to shorten transportation time from our factories in China and Hungary by using air freight rather than less expensive ocean freight.

We are dependent on ocean transportation to deliver our products in a cost efficient manner. If we are unable to use ocean transportation to deliver our products, our business and financial condition could be materially and adversely impacted.

          We rely on commercial ocean transportation for the delivery of a large percentage of our products to our customers in North America. We also rely on more expensive air transportation when ocean transportation is not available or compatible with the delivery time requirements of our customers. Our ability to deliver our products via ocean transportation could be adversely impacted by shortages in available cargo capacity, changes by carriers and transportation companies in policies and practices, such as scheduling, pricing, payment terms and frequency of service or increases in the cost of fuel, taxes and labor; and other factors, such as labor strikes and work stoppages, not within our control. If we are unable to use ocean transportation and are required to substitute more expensive air transportation, our financial condition and results of operations could be materially and adversely impacted. Recently, contentious negotiations between the Pacific Maritime Association and the International Longshore & Warehouse Union resulted in port slowdowns which have caused port congestion and major delays in the transfer of cargo in the United States West Coast. Accordingly, we have started to ship a higher percentage of our products to our customers in North America via air transportation. Material interruptions in service or stoppages in transportation, such as the aforementioned dispute, whether caused by strike, work stoppage, lock-out, slowdown or otherwise, could materially and adversely impact our business, results of operations and financial condition.

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We depend upon a small number of outside contract manufacturers. Our operations could be disrupted if we encounter problems with these contract manufacturers.

          We do not have internal manufacturing capabilities, and currently rely upon two contract manufacturers to build all of our products. Our reliance on a small number of contract manufacturers makes us vulnerable to possible capacity constraints and reduced control over component availability, delivery schedules, manufacturing yields and costs.

          The revenues that our contract manufacturers generate from our orders represent a relatively small percentage of their overall revenues. As a result, fulfilling our orders may not be considered a priority in the event of constrained ability to fulfill all of their customer obligations in a timely manner. In addition, the facilities in which our products are manufactured are located outside of the U.S., currently in China and Hungary. The location of these facilities outside of key markets such as the U.S. increases shipping time, thereby causing a long lead time between manufacturing and delivery.

          If any of our contract manufacturers were unable or unwilling to manufacture our products in required volumes and at high quality levels or renew existing terms under supply agreements, we would have to identify, qualify and select acceptable alternative contract manufacturers. An alternative contract manufacturer may not be available to us when needed or may not be in a position to satisfy our quality or production requirements on commercially reasonable terms, including price. Any significant interruption in manufacturing would require us to reduce our supply of products to our customers or increase our shipping costs to make up for delays in manufacturing, which in turn could reduce our revenues, harm our relationships with our customers and damage our reputation with local installers and potential end-users and cause us to forego potential revenue opportunities.

We may experience delays, disruptions or quality control problems in our manufacturing operations.

          Our product development, manufacturing and testing processes are complex and require significant technological and production process expertise. Such processes involve a number of precise steps from design to production. Any change in our processes could cause one or more production errors, requiring a temporary suspension or delay in our production line until the errors can be researched, identified and properly addressed and rectified. This may occur particularly as we introduce new products, modify our engineering and production techniques, and/or expand our capacity. In addition, our failure to maintain appropriate quality assurance processes could result in increased product failures, loss of customers, increased warranty reserve, increased production and logistics costs and delays. Any of these developments could have a material adverse effect on our business, financial condition, and results of operations.

We depend on a limited number of suppliers for key components and raw materials in our products to adequately meet anticipated demand. Due to the limited number of such suppliers, any cessation of operations or production or any shortage, delay, price change, imposition of tariffs or duties or other limitation on our ability to obtain the components and raw materials we use could result in sales delays, cancellations and loss of market share.

          We depend on limited or single source suppliers for certain key components and raw materials used to manufacture our products, making us susceptible to quality issues, shortages and price changes. Any of these limited or single source suppliers could stop producing our components or supplying our raw materials, cease operations or be acquired by, or enter into exclusive arrangements with, one or more of our competitors. As a result, these suppliers could stop selling to us at commercially reasonable prices, or at all. Because there are a limited number

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of suppliers of solar PV system components and raw materials used to manufacture our products, it may be difficult to quickly identify alternate suppliers or to qualify alternative components or raw materials on commercially reasonable terms, and our ability to satisfy customer demand may be adversely affected. Transitioning to a new supplier or redesigning a product to accommodate a new component manufacturer would result in additional costs and delays. These outcomes could harm our business or financial performance.

          Any interruption in the supply of limited source components or raw materials for our products would adversely affect our ability to meet scheduled product deliveries to our customers, could result in lost revenue or higher expenses and would harm our business.

Failure by our contract manufacturers or our component or raw material suppliers to use ethical business practices and comply with applicable laws and regulations may adversely affect our business.

          We do not control our contract manufacturers or suppliers or their business practices. Accordingly, we cannot guarantee that they follow ethical business practices such as fair wage practices and compliance with environmental, safety and other local laws. A lack of demonstrated compliance could lead us to seek alternative manufacturers or suppliers, which could increase our costs and result in delayed delivery of our products, product shortages or other disruptions of our operations. Violation of labor or other laws by our manufacturers or suppliers or the divergence of a supplier's labor or other practices from those generally accepted as ethical in the U.S. or other markets in which we do business could also attract negative publicity for us and harm our business.

Our results of operations may fluctuate from quarter to quarter, which could make our future performance difficult to predict and could cause our results of operations for a particular period to fall below expectations, resulting in a decline in the price of our common stock.

          Our quarterly results of operations are difficult to predict and may fluctuate significantly in the future. We have experienced seasonal and quarterly fluctuations in the past as a result of seasonal fluctuations in our customers' business. For example, our customers' and end-users' ability to install solar energy systems is affected by weather, as for example during the winter months in Europe and the northeastern U.S. Such installation delays can impact the timing of orders for our products. Further, given that we are an early-stage company operating in a rapidly growing industry, the true extent of these fluctuations may have been masked by our recent growth rates and consequently may not be readily apparent from our historical results of operations and may be difficult to predict. Our financial performance, sales, working capital requirements and cash flow may fluctuate, and our past quarterly results of operations may not be good indicators of future performance. Any substantial decrease in revenues would have an adverse effect on our financial condition, results of operations, cash flows and stock price.

We rely on distributors and large installers to assist in selling our products, and the failure of these customers to perform as expected could reduce our future revenue.

          We currently sell a substantial percentage of our products through distributors, who in turn sell to local installers, and through direct sales to large installers. We do not have exclusive arrangements with these third party distributors and large installers. Many of our distributors also market and sell products from our competitors, and all of our large installer customers also use products from our competitors. These distributors and large installers may terminate their relationships with us at any time and with little or no notice. Further, these distributors and large installers may fail to devote resources necessary to sell our products at the prices, in the volumes and within the time frames that we expect, or may focus their marketing and sales efforts on

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products of our competitors. Termination of agreements with current distributors or large installers, failure by these distributors or large installers to perform as expected, or failure by us to cultivate new distributor or large installer relationships, could hinder our ability to expand our operations and harm our revenue and results of operations.

If we fail to retain our key personnel or if we fail to attract additional qualified personnel, we may not be able to achieve our anticipated level of growth and our business could suffer.

          Our future success and ability to implement our business strategy depends, in part, on our ability to attract and retain key personnel, and on the continued contributions of members of our senior management team and key technical personnel, each of whom would be difficult to replace. All of our employees, including our senior management, are free to terminate their employment relationships with us at any time. Competition for highly skilled individuals with technical expertise is extremely intense, and we face challenges identifying, hiring and retaining qualified personnel in many areas of our business. Integrating new employees into our team could prove disruptive to our operations, require substantial resources and management attention and ultimately prove unsuccessful. An inability to retain our senior management and other key personnel or to attract additional qualified personnel could limit or delay our strategic efforts, which could have a material adverse effect on our business, financial condition, results of operations and prospects.

The requirements of being a public company may strain our resources, divert management's attention and affect our ability to attract and retain qualified board members and officers.

          As a public company, we will be subject to the reporting requirements of the Exchange Act, the listing requirements of the NASDAQ Global Market, and other applicable securities rules and regulations. Compliance with these rules and regulations will increase our legal and financial compliance costs, make some activities more difficult, time-consuming or costly and increase demand on our systems and resources. The Exchange Act requires, among other things, that we file annual, quarterly and current reports with respect to our business and results of operations and maintain effective disclosure controls and procedures and internal control over financial reporting. To maintain and, if required, improve our disclosure controls and procedures and internal control over financial reporting to meet this standard, significant resources and management oversight may be required. As a result, management's attention may be diverted from other business concerns, which could harm our business and results of operations. Although we have already hired additional employees in preparation for these heightened requirements, we may need to hire more employees in the future which would increase our costs and expenses.

          We also expect that being a public company will make it more expensive for us to obtain director and officer liability insurance and we may have to choose between reduced coverage or substantially higher costs to obtain coverage. These factors could make it more difficult for us to attract and retain qualified executive officers and members of our board of directors, particularly to serve on our audit committee and compensation committee.

If we fail to protect, or incur significant costs in defending, our intellectual property and other proprietary rights, our business and results of operations could be materially harmed.

          Our success depends to a significant degree on our ability to protect our intellectual property and other proprietary rights. We rely on a combination of patent, trademark, copyright, trade secret and unfair competition laws, as well as confidentiality and license agreements and other contractual provisions, to establish and protect our intellectual property and other proprietary rights. We have applied for patents in the U.S., Europe and China, some of which have been issued. We cannot guarantee that any of our pending applications will be approved or that our existing and future intellectual property rights will be sufficiently broad to protect our proprietary technology, and any

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failure to obtain such approvals or finding that our intellectual property rights are invalid or unenforceable could force us to, among other things, rebrand or re-design our affected products. In countries where we have not applied for patent protection or where effective intellectual property protection is not available to the same extent as in the U.S., we may be at greater risk that our proprietary rights will be misappropriated, infringed or otherwise violated.

Third parties may assert that we are infringing upon their intellectual property rights, which could divert management's attention, cause us to incur significant costs and prevent us from selling or using the technology to which such rights relate.

          Our competitors and other third parties hold numerous patents related to technology used in our industry. From time to time we may also be subject to claims of intellectual property right infringement and related litigation, and, if we gain greater recognition in the market, we face a higher risk of being the subject of claims that we have violated others' intellectual property rights. Regardless of their merit, responding to such claims can be time consuming, can divert management's attention and resources and may cause us to incur significant expenses in litigation or settlement. While we believe that our products and technology do not infringe in any material respect upon any valid intellectual property rights of third parties, we cannot be certain that we would be successful in defending against any such claims. If we do not successfully defend or settle an intellectual property claim, we could be liable for significant monetary damages and could be prohibited from continuing to use certain technology, business methods, content or brands. To avoid a prohibition, we could seek a license from the applicable third party, which could require us to pay significant royalties, increasing our operating expenses. If a license is not available at all or not available on reasonable terms, we may be required to develop or license a non-violating alternative, either of which could require significant effort and expense. If we cannot license or develop a non-violating alternative, we would be forced to limit or stop sales of our offerings and may be unable to effectively compete. Any of these results would adversely affect our business, financial condition and results of operations.

We may become subject to claims for remuneration or royalties for assigned service invention rights by our employees, which could result in litigation and adversely affect our business.

          We enter into agreements with our employees pursuant to which they agree that any inventions created in the scope of their employment or engagement are assigned to us or owned exclusively by us, depending on the jurisdiction, without the employee retaining any rights. A significant portion of our intellectual property has been developed by our employees in the course of their employment for us. Under the Israeli Patent Law, 5727-1967 (the "Patent Law"), inventions conceived by an employee during the scope of his or her employment with a company are regarded as "service inventions," which belong to the employer, absent a specific agreement between the employee and employer giving the employee service invention rights. The Patent Law also provides that if there is no such agreement between an employer and an employee, the Israeli Compensation and Royalties Committee (the "Committee"), a body constituted under the Patent Law, shall determine whether the employee is entitled to remuneration for his or her inventions. Recent decisions by the Committee and the Israeli Supreme Court have created uncertainty in this area, as the Israeli Supreme Court held that employees may be entitled to remuneration for their service inventions despite having specifically waived any such rights. Further, the Committee has not yet determined the method for calculating this Committee-enforced remuneration. Although our employees have agreed that any rights related to their inventions are owned exclusively by us, we may face claims demanding remuneration in consideration for such acknowledgement. As a consequence of such claims, we could be required to pay additional remuneration or royalties to our current and/or former employees, or be forced to litigate such claims, which could negatively affect our business.

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The loss of, or events affecting, one of our major customers could reduce our sales and have a material adverse effect on our business, financial condition and results of operations.

          For fiscal 2014, SolarCity, the largest independent solar power provider in the U.S., and Krannich, one of the leading solar PV distributors worldwide, accounted for 19.1% and 7.8% of our revenues, respectively. Our next five largest customers for fiscal 2014, together, accounted for 14.7% of our revenues. For the six months ended December 31, 2014, SolarCity, Krannich and our next five largest customers accounted for 32.3%, 7.1% and 21.0% of our revenues, respectively. Our customers' decisions to purchase our products are influenced by a number of factors outside of our control, including retail energy prices and government regulation and incentives, among others. In addition, these customers may decide to no longer use our products and services for other reasons which may be out of our control. Although we have agreements with some of our largest customers, these agreements do not have long-term purchase commitments and are generally terminable by either party after a relatively short notice period. The loss of, or events affecting, one or more of these customers could have a material adverse effect on our business, financial condition and results of operations.

Our planned expansion into new markets could subject us to additional business, financial and competitive risks.

          In fiscal 2014, we sold our products to approximately 200 direct customers in 38 countries, including the U.S., Australia, Belgium, Canada, China, France, Germany, Israel, Italy, Japan, the Netherlands and the United Kingdom. We intend to introduce new products targeted at large commercial and utility-scale installations and to expand into other international markets. Our success in these new product and geographic markets will depend on a number of factors, including our ability to develop solutions to address the requirements of the large commercial and utility-scale solar PV markets, timely qualification and certification of new products for large commercial and utility-scale solar PV installations, acceptance of power optimizers in solar PV markets in which they have not traditionally been used and our ability to manage increased manufacturing capacity and production.

          Further, these solar PV markets have different characteristics from the markets in which we currently sell products, and our success will depend on our ability to adapt properly to these differences. These differences may include differing regulatory requirements, including tax laws, trade laws, labor regulations, tariffs, export quotas, customs duties or other trade restrictions, limited or unfavorable intellectual property protection, international political or economic conditions, restrictions on the repatriation of earnings, longer sales cycles, warranty expectations, product return policies and cost, performance and compatibility requirements. In addition, expanding into new geographic markets will increase our exposure to presently existing risks, such as fluctuations in the value of foreign currencies and difficulties and increased expenses in complying with U.S. and foreign laws, regulations and trade standards, including the Foreign Corrupt Practices Act of 1977, as amended (the "FCPA").

          Failure to develop and introduce these new products successfully or to otherwise manage the risks and challenges associated with our potential expansion into new product and geographic markets could adversely affect our revenues and our ability to achieve or sustain profitability.

If we fail to manage our recent and future growth effectively, we may be unable to execute our business plan, maintain high levels of customer service or adequately address competitive challenges.

          We have experienced significant growth in recent periods with our annual product sales growing rapidly from approximately 8,400 inverters and approximately 181,000 power optimizers in

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fiscal 2011, our first full fiscal year of commercial shipments, to annual product sales exceeding 61,000 inverters and 1.3 million power optimizers in fiscal 2014. We intend to continue to expand our business significantly within existing and new markets. This growth has placed, and any future growth may place, a significant strain on our management, operational and financial infrastructure. In particular, we will be required to expand, train and manage our growing employee base and scale and otherwise improve our IT infrastructure in tandem with that headcount growth. Our management will also be required to maintain and expand our relationships with customers, suppliers and other third parties and attract new customers and suppliers, as well as manage multiple geographic locations.

          Our current and planned operations, personnel, IT and other systems and procedures might be inadequate to support our future growth and may require us to make additional unanticipated investment in our infrastructure. Our success and ability to further scale our business will depend, in part, on our ability to manage these changes in a cost-effective and efficient manner. If we cannot manage our growth, we may be unable to take advantage of market opportunities, execute our business strategies or respond to competitive pressures. This could also result in declines in quality or customer satisfaction, increased costs, difficulties in introducing new offerings or other operational difficulties. Any failure to effectively manage growth could adversely impact our business and reputation.

Covenants in our credit facility may limit our flexibility in responding to business opportunities and competitive developments and increase our vulnerability to adverse economic or industry conditions.

          We have a revolving line of credit from Silicon Valley Bank ("SVB"). The SVB credit facility restricts our ability to take certain actions such as borrow money, grant liens, pay dividends, dispose of assets, or engage in certain transactions. Our credit agreement with SVB also requires us to maintain certain EBITDA and liquidity levels. These restrictions may limit our flexibility in responding to business opportunities, competitive developments and adverse economic or industry conditions. In addition, our obligations under the credit facility are secured by substantially all of our assets, including all of our intellectual property, which limits our ability to provide collateral for additional financing. Nevertheless, we and our subsidiaries may incur substantial additional debt in the future and any debt instrument we enter into in the future may contain similar restrictions or collateral packages. A breach of any of these covenants, or a failure to pay principal or interest when due, could result in a variety of adverse consequences, including the acceleration of our indebtedness. Our assets and cash flow may not be sufficient to fully repay borrowings if some or all of our indebtedness is accelerated. Acceleration could result in the foreclosure by the lenders on our assets that secure the credit facility.

          Furthermore, there can be no assurance that we will be able to enter into new debt instruments on acceptable terms. If we are unable to satisfy financial covenants and other terms under existing or new credit arrangements or obtain waivers or forbearance from our lenders or if we are unable to obtain refinancing or new financings for our working capital, equipment and other needs on acceptable terms if and when needed, our business would be adversely affected.

We may not be able to raise additional capital to execute our current or future business strategies on favorable terms, if at all, or without dilution to our stockholders.

          We expect that we may need to raise additional capital to execute our current or future business strategies. However, we do not know what forms of financing, if any, will be available to us. Some financing activities in which we may engage could cause your equity interest in the Company to be diluted, which could cause the value of your stock to decrease. If financing is not available on acceptable terms, if and when needed, our ability to fund our operations, expand our

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research and development and sales and marketing functions, develop and enhance our products, respond to unanticipated events, including unanticipated opportunities, or otherwise respond to competitive pressures would be significantly limited. In any such event, our business, financial condition and results of operations could be materially harmed, and we may be unable to continue our operations.

Fluctuations in currency exchange rates may negatively impact our financial condition and results of operations.

          Although our financial results are reported in U.S. dollars, U.S. dollar revenues accounted for only 56% of our revenues in fiscal 2014. In addition, a significant portion of our operating expenses are accrued in New Israeli Shekels (primarily related to payroll) and, to a lesser extent, the Euro and other currencies. Our profitability is affected by movements of the U.S. dollar against the Euro, and, to a lesser extent, the New Israeli Shekel and other currencies in which we generate revenues, incur expenses and maintain cash balances. Foreign currency fluctuations may also affect the prices of our products. Our prices are denominated primarily in U.S. dollars. If there is a significant devaluation of a particular currency, the prices of our products will increase relative to the local currency and may be less competitive. Despite our efforts to minimize foreign currency risks, primarily by entering into forward hedging transactions to sell Euro for U.S. dollars at a predefined rate, and maintaining cash balances in New Israeli Shekels, significant long-term fluctuations in relative currency values, in particular a significant change in the relative values of the Euro and, to a lesser extent, the New Israeli Shekel and other currencies, against the U.S. dollar could have an adverse effect on our profitability and financial condition.

Any unauthorized access to, or disclosure or theft of personal information we gather, store or use could harm our reputation and subject us to claims or litigation.

          We receive, store and use certain personal information of our customers, and the end-users of our customers' solar PV systems, including names, addresses, e-mail addresses, credit information and energy production statistics. We also store and use personal information of our employees. We take steps to protect the security, integrity and confidentiality of the personal information we collect, store and transmit, but there is no guarantee that inadvertent or unauthorized use or disclosure will not occur or that third parties will not gain unauthorized access to this information despite our efforts. Because techniques used to obtain unauthorized access or sabotage systems change frequently and generally are not identified until they are launched against a target, we and our suppliers or vendors may be unable to anticipate these techniques or to implement adequate preventative or mitigation measures.

          Unauthorized use or disclosure of, or access to, any personal information maintained by us or on our behalf, whether through breach of our systems, breach of the systems of our suppliers or vendors by an unauthorized party, or through employee or contractor error, theft or misuse, or otherwise, could harm our business. If any such unauthorized use or disclosure of, or access to, such personal information were to occur, our operations could be seriously disrupted and we could be subject to demands, claims and litigation by private parties, and investigations, related actions, and penalties by regulatory authorities. In addition, we could incur significant costs in notifying affected persons and entities and otherwise complying with the multitude of foreign, federal, state and local laws and regulations relating to the unauthorized access to, or use or disclosure of, personal information. Finally, any perceived or actual unauthorized access to, or use or disclosure of, such information could harm our reputation, substantially impair our ability to attract and retain customers and have an adverse impact on our business, financial condition and results of operations.

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We could be adversely affected by any violations of the FCPA, the U.K. Bribery Act and other foreign anti-bribery laws.

          The FCPA generally prohibits companies and their intermediaries from making improper payments to foreign government officials for the purpose of obtaining or retaining business. Other countries in which we operate also have anti-bribery laws, some of which prohibit improper payments to government and non-government persons and entities. Our policies mandate compliance with these anti-bribery laws. However, we currently operate in and intend to further expand into, many parts of the world that have experienced governmental corruption to some degree and, in certain circumstances, strict compliance with anti-bribery laws may conflict with local customs and practices. In addition, due to the level of regulation in our industry, our entry into certain jurisdictions requires substantial government contact where norms can differ from U.S. standards. It is possible that our employees, subcontractors, agents and partners may take actions in violation of our policies and anti-bribery laws. Any such violation, even if prohibited by our policies, could subject us to criminal or civil penalties or other sanctions, which could have a material adverse effect on our business, financial condition, cash flows and reputation.

Risks Related to Operations in Israel

Conditions in Israel affect our operations and may limit our ability to develop, produce and sell our products.

          Although we are incorporated in Delaware, our headquarters and research and development center are located in Israel. Accordingly, political, economic and military conditions in Israel directly affect us. Israel has been involved in a number of armed conflicts and has been the target of terrorist activity. Rocket fire from the Gaza Strip, including against civilian targets, has occurred on an irregular basis, disrupting day-to-day civilian activity and negatively affecting business conditions. Any future armed conflict, political instability or violence in the region may impede our ability to manage our business effectively or to engage in research and development, or may otherwise adversely affect our business or operations. In the event of war, we and our Israeli products subcontractors and suppliers may cease operations, which may cause delays in the distribution and sale of our products. Some of our directors, executive officers and employees in Israel are obligated to perform annual reserve duty in the Israeli military and are subject to being called for additional active duty under emergency circumstances. In the event that our principal executive office is damaged as a result of hostile action, or hostilities otherwise disrupt the ongoing operation of our offices, our ability to operate could be materially adversely affected.

          Additionally, several countries, principally in the Middle East, restrict doing business with Israeli companies, and additional countries and groups may impose similar restrictions if hostilities in Israel or political instability in the region continue or increase. If recent regime changes and civil wars in neighboring states result in the establishment of fundamentalist Islamic regimes or governments more hostile to Israel, or if Egypt or Jordan abrogates its respective peace treaty with Israel, Israel could be subject to additional political, economic and military confines, and our operations and ability to sell our products to countries in the region could be materially adversely affected. These restrictions may limit materially our ability to obtain manufactured components and raw materials or to sell our products.

          Any hostilities involving Israel or the interruption or curtailment of trade between Israel and its present trading partners, or significant downturn in the economic or financial condition of Israel, could have a material adverse effect on our business, financial condition and results of operations.

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The tax benefits that are available to us under Israeli law require us to meet various conditions and may be terminated or reduced in the future, which could increase our costs and taxes.

          Our Israeli subsidiary is eligible for certain tax benefits provided to "Benefited Enterprises" under the Israeli Law for the Encouragement of Capital Investments, 1959 (the "Investment Law".) In order to remain eligible for the tax benefits for "Benefited Enterprises" we must continue to meet certain conditions stipulated in the Investment Law and its regulations, as amended. If these tax benefits are reduced, cancelled or discontinued, our Israeli taxable income would be subject to regular Israeli corporate tax rates and we may be required to refund any tax benefits that we have already received, plus interest and penalties thereon. The standard corporate tax rate for Israeli companies was increased to 25% in 2012 and 2013 and further increased to 26.5% for 2014 and thereafter. Additionally, if we increase our activities outside of Israel through acquisitions, for example, our expanded activities might not be eligible for inclusion in future Israeli tax benefit programs. The Israeli government may furthermore independently determine to reduce, phase out or eliminate entirely the benefit programs under the Investment Law, regardless of whether we then qualify for benefits under those programs at the time, which would also adversely affect our global tax rate and our results of operations.

The terms of Israeli government grants that we have received restrict our ability to transfer technologies outside of Israel, and we may be required to pay penalties in such a case or upon the sale of our Company.

          From January through December 31, 2014, we received a total of $0.6 million from the Office of the Chief Scientist in the Israel Ministry of Economy ("OCS"). We expect to receive additional grants to support our research and development activities in fiscal 2015. The terms of these grants require us to pay royalties at a rate of 4% to 4.5% on sales of products developed under these grants, up to the total grant amount, linked to the dollar and bearing interest at an annual rate of LIBOR applicable to dollar deposits. Even after payment in full, we will still be required to comply with the requirements of the Israeli Encouragement of Industrial Research and Development Law, 1984 (the "R&D Law"), and related regulations, with respect to those past grants. When a company develops know-how, technology or products under an OCS grant, the grant terms and the R&D Law restrict the transfer outside of Israel of such know-how without the prior approval of the OCS. Consequently, if aspects of our technologies are deemed to have been developed with OCS funding, the discretionary approval of an OCS committee would be required for any transfer to third parties outside of Israel of know-how related to those aspects of our technologies. The OCS may impose conditions on any arrangement under which it permits us to transfer technology or development out of Israel or may not grant such approval at all.

          Any transfer of OCS-supported technology or know-how outside of Israel may require payment of significant amounts to the OCS, depending on the value of the transferred technology or know-how, the amount of OCS support, the time of completion of the OCS-supported research project and other factors. These restrictions and requirements for payment may impair our ability to sell our technology assets outside of Israel. Furthermore, the consideration available to our shareholders in a transaction involving the transfer outside of Israel of technology or know-how developed with OCS funding (such as a merger or similar transaction) would be reduced by any amounts that we are required to pay to the OCS.

It may be difficult to enforce a judgment of a U.S. court against our officers and directors, to assert U.S. securities laws claims in Israel or to serve process on our officers and directors.

          The majority of our directors and executive officers reside outside of the U.S., and most of our assets and most of the assets of these persons are located outside of the U.S. Consequently, a judgment obtained against any of these persons, including a judgment based on the civil liability

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provisions of the U.S. federal securities laws, may not be collectible in the U.S. It also may be difficult for you to effect service of process on these persons in the U.S. or to assert U.S. securities law claims in original actions instituted in Israel. Israeli courts may refuse to hear a claim based on an alleged violation of U.S. securities laws on the grounds that Israel is not the most appropriate forum in which to bring such a claim. In addition, even if an Israeli court hears a claim, it may determine that Israeli law and not U.S. law is applicable to the claim. If U.S. law is found to be applicable, the content of applicable U.S. law must be proven as a fact by expert witnesses, which can be a time consuming and costly process. Further, an Israeli court may not enforce a judgment awarded by a U.S. or other non-Israeli court. Certain matters of procedure will also be governed by Israeli law. There is little binding case law in Israel that addresses these matters. As a result of the difficulty associated with enforcing a judgment against any of these persons in Israel, you may not be able to obtain or enforce a judgment against many of our directors and executive officers.

Risks Related to this Offering and Our Common Stock

An active, liquid trading market for our common stock may not develop.

          Prior to this offering, there has not been a public market for our common stock. Although we expect to list our common stock on the NASDAQ Global Market, we cannot predict whether an active public market for our common stock will develop or be sustained after this offering. If an active and liquid trading market does not develop, you may have difficulty selling or may not be able to sell any of the shares of our common stock that you purchase.

We cannot assure you that our stock price will not decline or not be subject to significant volatility after this offering.

          The market price of our common stock could be subject to significant fluctuations after this offering. The price of our stock may change in response to fluctuations in our results of operations in future periods and also may change in response to other factors, including factors specific to companies in our industry, many of which are beyond our control. As a result, our share price may experience significant volatility and may not necessarily reflect the value of our expected performance. Among other factors that could affect our stock price are:

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changes in laws or regulations applicable to our industry or offerings;



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speculation about our business in the press or the investment community;



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price and volume fluctuations in the overall stock market;



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volatility in the market price and trading volume of companies in our industry or companies that investors consider comparable;



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share price and volume fluctuations attributable to inconsistent trading levels of our shares;



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our ability to protect our intellectual property and other proprietary rights;



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sales of our common stock by us or our significant stockholders, officers and directors;



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the expiration of contractual lock-up agreements;



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the development and sustainability of an active trading market for our common stock;



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success of competitive products or services;



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the public's response to press releases or other public announcements by us or others, including our filings with the Securities and Exchange Commission (the "SEC"), announcements relating to litigation or significant changes to our key personnel;

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the effectiveness of our internal controls over financial reporting;



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changes in our capital structure, such as future issuances of debt or equity securities;



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our entry into new markets;



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tax developments in the U.S., Europe or other markets;



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strategic actions by us or our competitors, such as acquisitions or restructurings; and



•

changes in accounting principles.

          Further, the stock markets have experienced extreme price and volume fluctuations that have affected and continue to affect the market prices of equity securities of many companies. These fluctuations often have been unrelated or disproportionate to the operating performance of those companies. In addition, the stock prices of many renewable energy companies have experienced wide fluctuations that have often been unrelated to the operating performance of those companies. These broad market and industry fluctuations, as well as general economic, political and market conditions such as recessions, interest rate changes or international currency fluctuations, may cause the market price of our common stock to decline.

          We cannot assure you that you will be able to resell any of your shares of our common stock at or above the initial public offering price. The initial public offering price will be determined by negotiations between us and the representatives of the underwriters and may not be indicative of prices that will prevail in the trading market, if a trading market develops, after this offering. If the market price of our common stock after this offering does not exceed the initial public offering price, you may not realize any return on your investment and may lose some or all of your investment.

The price of our common stock could decline if securities analysts do not publish research or if securities analysts or other third parties publish inaccurate or unfavorable research about us.

          The trading of our common stock is likely to be influenced by the reports and research that industry or securities analysts publish about us, our business, our market or our competitors. We do not currently have and may never obtain research coverage by securities or industry analysts. If no securities or industry analysts commence coverage of our Company, the trading price for our common stock would be negatively affected. If we obtain securities or industry analyst coverage but one or more analysts downgrade our common stock or publish inaccurate or unfavorable research about our business, our stock price would likely decline. If one or more securities or industry analysts ceases to cover the Company or fails to regularly publish reports on us, we could lose visibility in the financial markets, which in turn could cause our stock price or trading volume to decline.

Future sales of our common stock, or the perception that such sales may occur, could depress our common stock price.

          Sales of a substantial number of shares of our common stock in the public market following this offering, or the perception that such sales may occur, could depress the market price of our common stock. Our executive officers and directors and certain of our equity holders have agreed with the underwriters not to offer, sell, dispose of or hedge any shares of our common stock or any options or warrants to purchase any shares of our common stock, or securities convertible into, exchangeable for, or that represent the right to receive, shares of our common stock, subject to specified limited exceptions described elsewhere in this prospectus, during the period ending 180 days after the date of the final prospectus, except with the prior written consent of the

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representatives of the underwriters. Prior to the time of this offering, we will effect a 1-for-3 reverse split of our common stock. Immediately prior to the closing of this offering, all outstanding shares of preferred stock will be converted into 28,247,923 shares of common stock and the outstanding warrants to purchase 563,014 shares of preferred stock will be converted into warrants to purchase 187,671 shares of common stock. Our certificate of incorporation, as expected to be in effect upon the completion of this offering, will authorize us to issue up to 125,000,000 shares of common stock, of which 38,069,764 shares of common stock will be outstanding, 6,201,291 shares of common stock will be issuable upon the exercise of outstanding stock options and 187,671 shares of common stock will be issuable upon the exercise of outstanding warrants. All shares of our common stock will be subject to the lock-up agreements or market stand-off provisions described under "Shares Available for Future Sale." Shares of our common stock held by our affiliates will continue to be subject to the volume and other restrictions of Rule 144 under the Securities Act. The representatives of the underwriters may, in their sole discretion and at any time without notice, release all or any portion of the shares subject to the lock-up. See "Underwriting."

          Upon the completion of this offering, the holders of an aggregate of 28,247,923 shares of our common stock and 187,671 shares of common stock issuable upon the exercise of outstanding warrants, based on shares of common stock and warrants outstanding as of December 31, 2014, or their transferees, will be entitled to rights with respect to the registration of their shares under the Securities Act. In addition, immediately following this offering, we intend to file a registration statement registering under the Securities Act the shares of common stock reserved for issuance under our new 2015 Global Incentive Plan and Employee Stock Purchase Plan or subject to outstanding awards granted under our 2007 Global Incentive Plan. See the information under the heading "Shares Available for Future Sale" for a more detailed description of the shares that will be available for future sales upon completion of this offering. Sales of our common stock pursuant to these registration rights or this registration statement may make it more difficult for us to sell equity securities in the future at a time and at a price that we deem appropriate. These sales also could cause our stock price to fall and make it more difficult for you to sell shares of our common stock.

If you purchase shares of our common stock sold in this offering, you will incur immediate and substantial dilution.

          If you purchase shares of our common stock in this offering, you will incur immediate and substantial dilution in the amount of $13.70 per share because the initial public offering price will be substantially higher than the pro forma net tangible book value per share of our outstanding common stock. This dilution would result because our earlier investors paid substantially less than the initial public offering price when they purchased their shares. In addition, you may also experience additional dilution upon future equity issuances, the exercise of stock options to purchase common stock granted to our employees and directors under our stock option and equity incentive plans or the exercise of warrants to purchase common stock. See "Dilution."

Our management will have broad discretion over the use of the proceeds from this offering and may not apply the proceeds of this offering in ways that increase the value of your investment.

          Our management will have broad discretion to use the net proceeds we receive from this offering and you will be relying on its judgment regarding the application of these proceeds.

          As discussed under "Use of Proceeds", we intend to use the net proceeds of this offering primarily for general corporate purposes, including working capital and expansion of our business into additional markets. Management may not apply the net proceeds of this offering in ways that increase the value of your investment.

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As an emerging growth company within the meaning of the Securities Act, we may utilize certain modified disclosure requirements, and we cannot be certain if these reduced requirements will make our common stock less attractive to investors.

          We are an emerging growth company, and, for as long as we continue to be an emerging growth company, we may choose to take advantage of exemptions from various reporting requirements applicable to other public companies but not to "emerging growth companies" including not being required to have our independent registered public accounting firm audit our internal control over financial reporting under Section 404 of the Sarbanes-Oxley Act, reduced disclosure obligations regarding executive compensation in our periodic reports and proxy statements, and exemptions from the requirements of holding a nonbinding advisory vote on executive compensation and stockholder approval of any golden parachute compensation not previously approved. We have in this prospectus utilized, and we may in future filings with the SEC continue to utilize, the modified disclosure requirements available to emerging growth companies. As a result, our stockholders may not have access to certain information they may deem important.

          In addition, Section 107 of the JOBS Act also provides that an emerging growth company can utilize the extended transition period provided in Section 7(a)(2)(B) of the Securities Act for complying with new or revised accounting standards. Thus, an emerging growth company can delay the adoption of certain accounting standards until those standards would otherwise apply to private companies. We have irrevocably elected not to avail ourselves of this exemption and, therefore, we will be subject to the same new or revised accounting standards as other public companies that are not "emerging growth companies."

          Following this offering, we could remain an emerging growth company until the earliest to occur of (i) the last day of the fiscal year during which we had total annual gross revenues of at least $1 billion (as indexed for inflation), (ii) the last day of the fiscal year following the fifth anniversary of the date of the first sale of common stock under this registration statement, (iii) the date on which we have, during the previous three-year period, issued more than $1 billion in non-convertible debt or (iv) the date on which we are deemed to be a "large accelerated filer," as defined under the Exchange Act.

Provisions in our certificate of incorporation and by-laws, as amended and restated in connection with the closing of this offering, may have the effect of delaying or preventing a change of control or changes in our management.

          Our certificate of incorporation and by-laws will contain provisions that could depress the trading price of our common stock by discouraging, delaying or preventing a change of control of our Company or changes in our management that the stockholders of our Company may believe advantageous. These provisions include:

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authorizing "blank check" preferred stock that our board of directors could issue to increase the number of outstanding shares to discourage a takeover attempt;



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providing for a classified board of directors with staggered, three-year terms, which could delay the ability of stockholders to change the membership of a majority of our board of directors;



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not providing for cumulative voting in the election of directors, which limits the ability of minority stockholders to elect director candidates;



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limiting the ability of stockholders to call a special stockholder meeting;



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prohibiting stockholders from acting by written consent;

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establishing advance notice requirements for nominations for election to our board of directors or for proposing matters that can be acted upon by stockholders at stockholder meetings;



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the removal of directors only for cause and only upon the affirmative vote of the holders of at least 66 ² / 3 % in voting power of all the then-outstanding shares of common stock of the Company entitled to vote thereon, voting together as a single class;



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providing that our board of directors is expressly authorized to amend, alter, rescind or repeal our by-laws; and



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requiring the affirmative vote of holders of at least 66 ² / 3 % of the voting power of all of the then outstanding shares of common stock, voting as a single class, to amend provisions of our certificate of incorporation relating to the management of our business, our board of directors, stockholder action by written consent, advance notification of stockholder nominations and proposals, calling special meetings of stockholders, forum selection and the liability of our directors, or to amend, alter, rescind or repeal our by-laws.

          In addition, we are governed by the provisions of Section 203 of the Delaware General Corporation Law, which generally prohibits a Delaware corporation from engaging in a broad range of business combinations with any "interested" stockholder for a period of three years following the date on which the stockholder becomes an "interested" stockholder. For a description of our capital stock, see "Description of Capital Stock."

We do not intend to pay any cash dividends on our common stock in the foreseeable future.

          We have never declared or paid any dividends on our common stock. We currently intend to retain any future earnings and do not expect to pay any dividends in the foreseeable future. In addition, the terms of our debt instruments impose restrictions on our ability to declare dividends on our common stock. Any future determination to declare cash dividends will be made at the discretion of our board of directors, subject to applicable laws and provisions of our debt instruments and organizational documents, after taking into account our financial condition, results of operations, capital requirements, general business conditions and other factors that our board of directors may deem relevant. As a result, capital appreciation in the price of our common stock, if any, may be your only source of gain on an investment in our common stock.

If we fail to establish and maintain an effective system of integrated internal controls, we may not be able to report our financial results accurately, which could have a material adverse effect on our business, financial condition and results of operations.

          Ensuring that we have adequate internal financial and accounting controls and procedures in place so that we can produce accurate financial statements on a timely basis is a costly and time-consuming effort that will need to be evaluated frequently. Section 404 of the Sarbanes-Oxley Act requires public companies to conduct an annual review and evaluation of their internal controls and requires attestations of the effectiveness of internal controls by independent auditors. We would be required to perform the annual review and evaluation of our internal controls no later than for fiscal 2016. We initially expect to qualify as an emerging growth company, and thus, we would be exempt from the auditors' attestation requirement until such time as we no longer qualify as an emerging growth company. Regardless of whether we qualify as an emerging growth company, we will still need to implement substantial control systems and procedures in order to satisfy the reporting requirements under the Exchange Act and applicable NASDAQ Global Market requirements, among other items. Establishing these internal controls will be costly and may divert management's attention.

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          Evaluation by us of our internal controls over financial reporting may identify material weaknesses that may cause us to be unable to report our financial information on a timely basis and thereby subject us to adverse regulatory consequences, including sanctions by the SEC or violations of NASDAQ Global Market rules. There also could be a negative reaction in the financial markets due to a loss of investor confidence in us and the reliability of our financial statements. Confidence in the reliability of our financial statements also could suffer if we or our independent registered public accounting firm were to report a material weakness in our internal controls over financial reporting. This could have a material adverse effect on our business, financial condition and results of operations and could also lead to a decline in the price of our common stock.

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