Annual Report for Fiscal Year Ending December 31, 2025 (Form 10-K)

UNITED STATES

SECURITIES AND EXCHANGE COMMISSION

Washington, D.C. 20549

FORM 10-K

(Mark One)

For the fiscal year ended December 31, 2025

or

For the Transition Period from to

Commission File No. 001-32919

Ascent Solar Technologies, Inc.

(Exact name of registrant as specified in its charter)

Registrant's telephone number including area code: 720-872-5000

Securities registered pursuant to Section 12(b) of the Act:

Securities registered pursuant to Section 12(g) of the Act:

None

Indicate by check mark if the registrant is a well-known seasoned issuer, as defined in Rule 405 of the Securities Act. Yes ☐ No☒

Indicate by check mark if the registrant is not required to file reports pursuant to Section 13 or 15(d) of the Exchange Act. Yes ☐ No☒

Indicate by check mark whether the registrant (1) has filed all reports required to be filed by Section 13 or 15(d) of the Securities Exchange Act of 1934 during the preceding 12 months (or for such shorter period that the registrant was required to file such reports), and (2) has been subject to such filing requirements for the past 90 days. Yes☒ No ☐

Indicate by check mark whether the registrant has submitted electronically every Interactive Data File required to be submitted pursuant to Rule 405 of Regulation S-T (§232.405 of this chapter) during the preceding 12 months (or for such shorter period that the registrant was required to submit such files). ☒ Yes☐ No

Indicate by check mark whether the registrant is a large accelerated filer, an accelerated filer, a non-accelerated filer, smaller reporting company, or an emerging growth company. See the definitions of "large accelerated filer," "accelerated filer," "smaller reporting company," and "emerging growth company" in Rule 12b-2 of the Exchange Act:

If an emerging growth company, indicate by check mark if the registrant has elected not to use the extended transition period for complying with any new or revised financial accounting standards provided pursuant to Section 13(a) of the Exchange Act. ☐

Indicate by check mark whether the registrant has filed a report on and attestation to its management's assessment of the effectiveness of its internal control over financial reporting under Section 404(b) of the Sarbanes-Oxley Act (15 U.S.C. 7262(b)) by the registered public accounting firm that prepared or issued its audit report. ☐

If securities are registered pursuant to Section 12(b) of the Act, indicate by check mark whether the financial statements of the registrant included in the filing reflect the correction of an error to previously issued financial statements. ☐

Indicate by check mark whether any of those error corrections are restatements that required a recovery analysis of incentive-based compensation received by any of the registrant's executive officers during the relevant recovery period pursuant to §240.10D-1(b). ☐

Indicate by check mark whether the registrant is a shell company (as defined in Rule 12b-2 of the Exchange Act). Yes ☐ No ☒

As of June 30, 2025, the last business day of the registrant's most recently completed second fiscal quarter, the aggregate market value of the registrant's common stock held by non-affiliates was approximately $7,075,300based upon the last reported sale price of the registrant's common stock on that date as reported by Nasdaq Capital Market.

As of March 20, 2026, there were 9,461,887shares of our common stock issued and outstanding.

ASCENT SOLAR TECHNOLOGIES, INC.

Form 10-K Annual Report

for the Fiscal Year ended December 31, 2025

Table of Contents

FORWARD-LOOKING STATEMENTS

This Annual Report on Form 10-K includes "forward-looking statements" that involve risks and uncertainties. Forward-looking statements include statements concerning our plans, objectives, goals, strategies, future events, future net sales or performance, capital expenditures, financing needs, plans or intentions relating to acquisitions, business trends and other information that is not historical information and, in particular, appear under headings including "Management's Discussion and Analysis of Financial Condition and Results of Operations" and "Business." When used in this Annual Report, the words "estimates," "expects," "anticipates," "projects," "plans," "intends," "believes," "forecasts," "foresees," "likely," "may," "should," "goal," "target," and variations of such words or similar expressions are intended to identify forward-looking statements, but the absence of these words does not mean that a statement is not forward-looking. All forward-looking statements are based upon information available to us on the date of this Annual Report.

These forward-looking statements are subject to risks, uncertainties and other factors, many of which are outside of our control, that could cause actual results to differ materially from the results discussed in the forward-looking statements, including, among other things, the matters discussed in this Annual Report in the sections captioned "Risk Factors" and "Management's Discussion and Analysis of Financial Condition and Results of Operations." Factors you should consider that could cause these differences are:

There may be other factors that could cause our actual results to differ materially from the results referred to in the forward-looking statements. We undertake no obligation to publicly update or revise forward-looking statements to reflect subsequent events or circumstances after the date made, or to reflect the occurrence of unanticipated events, except as required by law.

References to "we," "us," "our," "Ascent," "Ascent Solar" or the "Company" in this Annual Report mean Ascent Solar Technologies, Inc.

PARTI

Item 1. Business

Business Overview

Ascent Solar Technologies, Inc. ("Ascent" or the "Company") is a solar technology company that manufactures and sells photovoltaic ("PV") solar modules that are flexible, durable, and possess attractive power to weight and power to area performance. Our technology provides renewable power solutions to high-value production and specialty solar markets where traditional rigid solar panels are not suitable, including space power beaming, aerospace, satellites, near earth orbiting vehicles, fixed wing unmanned aerial vehicles ("UAV"), aquatic, terrestrial, and other weight-sensitive markets (including DoD drone and space operations) with transformational high quality, value added product applications. We operate in these target markets because they have highly specialized needs for power generation and offer attractive pricing due to the significant technological requirements.

We believe the value proposition of Ascent's proprietary solar technology not only aligns with the needs of customers in our target markets, but also overcomes many of the obstacle's other solar technologies face in space, aerospace and other markets. Ascent designs and develops finished products for end users in these areas and collaborates with strategic partners to design and develop integrated solutions for products like satellites, spacecraft, airships and UAV. Ascent sees significant overlap in the needs of end users across some of these markets and believes it can achieve economies of scale in sourcing, development, and production in commercializing products for these customers.

The integration of Ascent's solar modules into space, near space, and aeronautic vehicles with ultra-lightweight and flexible solar modules is an important market opportunity for the Company. Customers in this market have historically required a high level of durability, high voltage and conversion efficiency from solar module suppliers, and we believe our products are well suited to compete in this premium market and will fill a void in the satellite market with a lower cost, lighter module and a product that, if struck by an object in space, will create limited space debris.

Product Update

The Company continues to focus on cell and aerial efficiency improvements on our Copper-Indium-Gallium-diSelenide ("CIGS")-based solar cells. The Company continues to improve overall performance and efficiencies by minimizing optical losses and improving overall short-circuit current and open-circuit voltages. These efforts resulted in Ascent's engineering and production teams consistently achieving increases in device efficiency and overall performance since September 2023, with its latest achievement at 15.7%. The Company continues to focus its R&D efforts on increasing aerial efficiencies and power to weight ratios in the AM0 spectrum.

Due to the high durability enabled by the monolithic integration employed by our technology, the capability to customize modules into different form factors and what we believe is the industry leading light weight and flexibility provided by our modules, we believe that the potential applications for our products are extensive, including integrated solutions anywhere that may need power generation such as power beaming solutions, or vehicles in space or in flight.

Commercialization and Manufacturing Strategy

We manufacture our products by affixing a thin CIGS layer to a flexible, plastic substrate using a large format, roll-to-roll process that permits us to fabricate our flexible PV modules in an integrated sequential operation. We use proprietary monolithic integration techniques which enable us to form complete PV modules with little to no costly back-end assembly of inter-cell connections. Traditional PV manufacturers assemble PV modules by bonding or soldering discrete PV cells together. This manufacturing step typically increases manufacturing costs and, at times, proves detrimental to the overall yield and reliability of the finished product. By reducing or eliminating this added step, using our proprietary monolithic integration techniques, we believe we can achieve cost savings in, and increase the reliability of, our PV modules.

Advantages of CIGS on a Flexible Plastic Substrate

Thin film PV solutions differ based on the type of semiconductor material chosen to act as a sunlight absorbing layer, and also on the type of substrate on which the sunlight absorbing layer is affixed. To the best of our knowledge, we believe we are the only company in the world currently focused on commercial scale production of PV modules using CIGS on a flexible, plastic substrate with monolithic integration. We utilize CIGS as a semiconductor material because, at the laboratory level, it has a higher demonstrated cell conversion efficiency than amorphous silicon ("a-Si") and cadmium telluride ("CdTe"). We also believe CIGS offers other compelling advantages over both a-Si and CdTe, including:

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We also believe that, although over time, Gallium Arsenide ("GaSa") modules have achieved conversion efficiencies that are generally comparable to CIGS, GaSa is more expensive than our CIGS products and that CIGS has a more advantageous weight per watt output when compared to GaSa.

We believe our choice of substrate material further differentiates us from other thin-film PV manufacturers. We believe the use of a flexible, lightweight, insulating substrate that is easier to install provides clear advantages for our target markets, especially where rigid substrates are unsuitable. We also believe our use of a flexible, plastic substrate provides us significant cost advantages because it enables us to employ monolithic integration techniques on larger components, which we believe are unavailable to manufacturers who use flexible, metal substrates. Accordingly, we are able to significantly reduce part count, thereby reducing the need for costly back end assembly of inter cell connections. As the only company, to our knowledge, focused on the commercial production of PV modules using CIGS on a flexible, plastic substrate with monolithic integration, we believe we have the opportunity to address the aerospace and other weight-sensitive markets with transformational high quality, value added product applications. It is these same unique features and our overall manufacturing process that enable us to produce extremely robust, light and flexible products.

Competitive Strengths

We believe we possess a number of competitive strengths that provide us with an advantage over our competitors.

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Competition

We believe our thin film, monolithically integrated CIGS technology enables us to deliver sleek, lightweight, rugged, high performance solutions to serve these markets as competitors from other thin film and c-Si companies emerge. The landscape of thin film manufacturers encompasses a broad mix of technology platforms at various stages of development and consists of a number of medium and small companies.

The market for traditional, grid connected PV products is dominated by large manufacturers of c-Si technology, although thin film technology on glass has begun to emerge among the major players. We anticipate that while these large manufacturers may continue to dominate the market with their silicon-based products, thin film manufacturers will likely capture an increasingly larger share of the market.

We believe that our modules offer unique advantages. Their flexibility, low areal density (mass per unit area), and high specific power (power per unit mass) enable use on weight-sensitive applications, such as portable power, conformal aircraft surfaces, high altitude long endurance (HALE) fixed wing and lighter than air (LTA) vehicles, and space applications that are unsuitable for glass-based modules. Innovative product design, customer focused development, and our rapid prototyping capability yield modules that could be integrated into virtually any product to create a source of renewable energy. Whether compared to glass based or other flexible modules, our products offer competitive advantages making them unique in comparison to competing products.

Research and Development and Intellectual Property

Our technology was initially developed at ITN beginning in 1994. In early 2006, ITN assigned to us certain CIGS PV-specific technologies, and granted to us a perpetual, exclusive, royalty free, worldwide license to use these technologies in connection with the manufacture, development, marketing and commercialization of CIGS PV to produce solar power. In addition, certain of ITN's existing and future proprietary process and control technologies, although nonspecific to CIGS PV, were assigned to us. ITN retained the right to conduct research and development activities in connection with PV materials, and we agreed to grant a license back to ITN for improvements to the licensed technologies and intellectual property outside of the CIGS PV field.

We intend to continue to invest in research and development in order to provide near term improvements to our manufacturing process (including to reduce costs) and products (including improve technology to increase power), as well as to identify next generation technologies relevant to both our existing and potential new markets. During the years ended December 31, 2025 and 2024, we incurred approximately $2,443,194 and $2,300,948, respectively, in research, development and manufacturing operations costs, which include research and development incurred in customizing products for customers, as well as manufacturing costs incurred while developing our product lines and manufacturing process. We also plan to continue to take advantage of research and development contracts to fund a portion of this development.

We protect our intellectual property through a combination of trade secrets and patent protections and own several patents that protect our manufacturing process.

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Suppliers

We rely on several unaffiliated companies to supply certain raw materials used during the fabrication of our PV modules and PV integrated electronics. We acquire these materials on a purchase order basis and do not have long term purchase quantity commitments with the suppliers, although we may enter into such contracts in the future. We currently acquire all of our high temperature plastic from one supplier, although alternative suppliers of similar materials exist. We purchase component molybdenum, copper, indium, gallium, selenium and indium tin oxides from a variety of suppliers. We also continue the process of identifying and negotiating arrangements with alternative suppliers of materials in the United States and Asia.

The manufacturing equipment and tools used in our production process have been purchased from various suppliers in Europe, the United States and Asia. Although we have had good relations with our existing equipment and tools suppliers, we monitor and explore opportunities for developing alternative sources to drive our manufacturing costs down.

Employees

As of December 31, 2025, we had 14 full-time and 4 part-time employees.

Company History

We were formed in October 2005 from the separation by ITN of its Advanced Photovoltaic Division and all of that division's key personnel and core technologies. ITN, a private company incorporated in 1994, is an incubator dedicated to the development of thin film, PV, battery, fuel cell and nanotechnologies. Through its work on research and development contracts for private and government entities, ITN developed proprietary processing and manufacturing know-how applicable to PV products generally, and to CIGS PV products in particular. Our Company was established by ITN to commercialize its investment in CIGS PV technologies. In January 2006, ITN assigned to us all its CIGS PV technologies and trade secrets and granted to us a perpetual, exclusive, royalty free worldwide license to use certain of ITN's proprietary process, control and design technologies in the production of CIGS PV modules. Upon receipt of the necessary government approvals in January 2007, ITN assigned government funded research and development contracts to us and also transferred the key personnel working on the contracts to us.

Corporate Information

We were incorporated under the laws of Delaware in October 2005. Our principal business office is located at 12300 Grant Street, Thornton, Colorado 80241, and our telephone number is (720) 872-5000. Our website address is www.AscentSolar.com. Information contained on our website or any other website does not constitute, and should not be considered, part of this Annual Report.

Available Information

We file with the Securities and Exchange Commission ("SEC") our annual report on Form 10-K, quarterly reports on Form 10-Q, current reports on Form 8-K and all amendments to those reports, proxy statements and registration statements. Such filings are available to the public over the internet at the SEC's website at http://www.sec.gov. We make available free of charge on, or through, our website at www.AscentSolar.comour annual reports on Form 10-K, quarterly reports on Form 10-Q, current reports on Form 8-K and amendments to these reports filed or furnished pursuant to Section 13(a) or 15(d) of the Securities Exchange Act of 1934, as amended ("Exchange Act") as soon as reasonably practicable after we file these materials with the SEC.

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Item 1A. Risk Factors

The risks included here are not exhaustive or exclusive. Other sections of this Annual Report may include additional factors which could adversely affect our business, results of operations and financial performance. We operate in a very competitive and rapidly changing environment. New risk factors emerge from time to time, and it is not possible for management to predict all such risk factors, nor can it assess the impact of all such risk factors on our business or the extent to which any factor, or combination of factors, may cause actual results to differ materially from those contained in any forward-looking statements. Given these risks and uncertainties, investors should not place undue reliance on forward-looking statements as a prediction of actual results.

Risks Relating to Our Business

Our continuing operations will require additional capital which we may not be able to obtain on favorable terms, if at all, or without dilution to our stockholders.Since inception, we have incurred significant losses. We expect to continue to incur net losses in the near term. For the year ended December 31, 2025, our cash used in operations was $6,903,966. At December 31, 2025, we had cash and equivalents on hand of $2,786,493.

We currently have limited industrial scale production capacities and we continue to focus on research and development activities to improve our PV products. We do not expect that sales revenue and cash flows will be sufficient to support operations and cash requirements until we have fully implemented our strategy of focusing on high value PV products and manufacturing at full industrial scale. Product revenues did not result in a positive cash flow for the 2025 year, and are not anticipated to result in a positive cash flow for the next twelve months.

During 2025, we entered into multiple financing agreements to fund operations, raising approximately $7.3 million in gross proceeds, which includes warrant exercises. We do not expect that sales revenue and cash flows will be sufficient to support operations and cash requirements for the foreseeable future, and we will depend on raising additional capital to maintain operations until we become profitable. There is no assurance that we will be able to raise additional capital on acceptable terms or at all. If we raise additional funds through the issuance of equity or convertible debt securities, the percentage ownership of our existing stockholders could be significantly diluted, and these newly issued securities may have rights, preferences or privileges senior to those of existing stockholders. If we raise additional funds through debt financing, which may involve restrictive covenants, our ability to operate our business may be restricted. If adequate funds are not available or are not available on acceptable terms, if and when needed, our ability to fund our operations, take advantage of unanticipated opportunities, develop or enhance our products, expand capacity or otherwise respond to competitive pressures could be significantly limited, and our business, results of operations and financial condition could be materially and adversely affected.

Our auditors have expressed substantial doubt about our ability to continue as a going concern.Our auditors' report on our December 31, 2025 financial statements expresses an opinion that our capital resources as of the date of their audit report were not sufficient to sustain operations or complete our planned activities for the year 2026 unless we raised additional funds. Additionally, as a result of the Company's recurring losses from operations, and the need for additional financing to fund its operating and capital requirements, there is uncertainty regarding the Company's ability to maintain liquidity sufficient to operate its business effectively, which raises doubt as to the Company's ability to continue as a going concern. Management cannot provide any assurances that the Company will be successful in accomplishing any of its plans. Our December 31, 2025, financial statements do not include any adjustments that might be necessary should the Company be unable to continue as a going concern.

We have a limited history of operations, have not generated significant revenue from operations and have had limited production of our products.We have a limited operating history and have generated limited revenue from operations. Currently we are producing products in quantities necessary to meet current demand. Under our current business plan, we expect losses to continue until annual revenues and gross margins reach a high enough level to cover operating expenses. Our ability to achieve our business, commercialization and expansion objectives will depend on a number of factors, including whether:

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Each of these factors is critical to our success and accomplishing each of these tasks may take longer or cost more than expected or may never be accomplished. It also is likely that problems we cannot now anticipate will arise. If we cannot overcome these problems, our business, results of operations and financial condition could be materially and adversely affected.

We have to date incurred net losses and may be unable to generate sufficient sales in the future to become profitable.We incurred a net loss of $7,832,755 for the year ended December 31, 2025, and reported an accumulated deficit of $499,441,465 as of December 31, 2025. We expect to incur net losses in the near term. Our ability to achieve profitability depends on a number of factors, including market acceptance of our specialty PV products at competitive prices. If we are unable to raise additional capital and generate sufficient revenue to achieve profitability and positive cash flows, we may be unable to satisfy our commitments and may have to discontinue operations.

Our business is based on a new technology, and if our PV modules or processes fail to achieve the performance and cost metrics that we expect, then we may be unable to develop demand for our PV modules and generate sufficient revenue to support our operations.Our CIGS on flexible plastic substrate technology is a relatively new technology. Our business plan and strategies assume that we will be able to achieve certain milestones and metrics in terms of throughput, uniformity of cell efficiencies, yield, encapsulation, packaging, cost and other production parameters. We cannot assure you that our technology will prove to be commercially viable in accordance with our plan and strategies. Further, we or our strategic partners and licensees may experience operational problems with such technology after its commercial introduction that could delay or defeat the ability of such technology to generate revenue or operating profits. If we are unable to achieve our targets on time and within our planned budget, then we may not be able to develop adequate demand for our PV modules, and our business, results of operations and financial condition could be materially and adversely affected.

Our failure to further refine our technology and develop and introduce improved PV products could render our PV modules uncompetitive or obsolete and reduce our net sales and market share.Our success requires us to invest significant financial resources in research and development to keep pace with technological advances in the solar energy industry. However, research and development activities are inherently uncertain, and we could encounter practical difficulties in commercializing our research results. Our expenditures on research and development may not be sufficient to produce the desired technological advances, or they may not produce corresponding benefits. Our PV modules may be rendered obsolete by the technological advances of our competitors, which could harm our results of operations and adversely impact our net sales and market share.

Failure to expand our manufacturing capability successfully at our facilities would adversely impact our ability to sell our products into our target markets and would materially and adversely affect our business, results of operations and financial condition.Our growth plan calls for production and operations at our facility. Successful operations will require substantial engineering and manufacturing resources and are subject to significant risks, including risks of cost overruns, delays and other risks, such as geopolitical unrest that may cause us not to be able to successfully operate in other countries. Furthermore, we may never be able to operate our production processes in high volume or at the volumes projected, make planned process and equipment improvements, attain projected manufacturing yields or desired annual capacity, obtain timely delivery of components, or hire and train the additional employees and management needed to scale our operations. Failure to

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meet these objectives on time and within our planned budget could materially and adversely affect our business, results of operations and financial condition.

We may be unable to manage the expansion of our operations and strategic alliances effectively.We will need to significantly expand our operations and form beneficial strategic alliances in order to reduce manufacturing costs through economies of scale and partnerships, secure contracts of commercially material amounts with reputable customers and capture a meaningful share of our target markets. While we have formed some strategic alliances and will continue expand our partnership base, these strategic alliances are in early stages and we can give no assurances that these relationships will generate our desired results. To manage the expansion of our operations and alliances, we will be required to improve our operational and financial systems, oversight, procedures and controls and expand, train and manage our growing employee base. Our management team will also be required to maintain and cultivate our relationships with partners, customers, suppliers and other third parties and attract new partners, customers and suppliers. In addition, our current and planned operations, personnel, facility size and configuration, systems and internal procedures and controls, even when augmented through strategic alliances, might be inadequate or insufficient to support our future growth. If we cannot manage our growth effectively, we may be unable to take advantage of market opportunities, execute our business strategies or respond to competitive pressures, resulting in a material and adverse effect to our business, results of operations and financial condition.

We depend on a limited number of third-party suppliers for key raw materials, and their failure to perform could cause manufacturing delays and impair our ability to deliver PV modules to customers in the required quality and quantity and at a price that is profitable to us.Our failure to obtain raw materials and components that meet our quality, quantity and cost requirements in a timely manner could interrupt or impair our ability to manufacture our products or increase our manufacturing cost. Most of our key raw materials are either sole sourced or sourced by a limited number of third-party suppliers. As a result, the failure of any of our suppliers to perform could disrupt our supply chain and impair our operations. Many of our suppliers are small companies that may be unable to supply our increasing demand for raw materials as we implement our planned expansion. We may be unable to identify new suppliers in a timely manner or on commercially reasonable terms. Raw materials from new suppliers may also be less suited for our technology and yield PV modules with lower conversion efficiencies, higher failure rates and higher rates of degradation than PV modules manufactured with the raw materials from our current suppliers.

Our products may never gain sufficient market acceptance, in which case we would be unable to sell our products or achieve profitability.Demand for our products may never develop sufficiently, and our products may never gain market acceptance, if we fail to produce products that compare favorably against competing products on the basis of cost, quality, weight, efficiency and performance. Demand for our products also will depend on our ability to develop and maintain successful relationships with key partners, including direct customers, distributors, retailers, OEMs, system integrators and value-added resellers. If our products fail to gain market acceptance as quickly as we envision or at all, our business, results of operations and financial condition could be materially and adversely affected.

We are targeting emerging markets for a significant portion of our planned product sales. These markets are new and may not develop as rapidly as we expect or may not develop at all.Our target markets include power beaming, space, near space, and other markets that require durable specialty solar products. Although certain areas of these markets have started to develop, some of them are in their infancy. We believe these markets have significant long-term potential; however, some or all of these markets may not develop and emerge as we expect. If the markets do develop as expected, there may be other products that could provide a superior product or a comparable product at lower prices than our products. If these markets do not develop as we expect, or if competitors are better able to capitalize on these markets our revenues and product margins may be negatively affected.

Failure to consummate strategic relationships with key partners in our various target market segments, such as defense, transportation, space and near space, and the respective implementations of the right strategic partnerships to enter these various specified markets, could adversely affect our projected sales, growth and revenues.We intend to sell thin-film PV modules for use in power beaming, space, near space solar, and and other markets that require durable specialty solar products. Our marketing and distribution strategy is to form strategic relationships with direct customers, distributors, value added resellers and e-commerce to provide a foothold in these target markets. If we are unable to successfully establish working relationships with such market participants or if, due to cost, technical or other factors, our products prove unsuitable for use in such applications; our projected revenues and operating results could be adversely affected.

If sufficient demand for our products does not develop or takes longer to develop than we anticipate, we may be unable to grow our business, generate sufficient revenue to attain profitability or continue operations.The solar energy industry is currently dominated by the rigid crystalline silicon based technology. The extent to which our flexible thin film PV modules will be widely adopted is uncertain. Many factors, of which several are outside of our control, may affect the viability of widespread adoption and demand for our flexible PV modules.

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We face intense competition from other manufacturers of thin-film PV modules and other companies in the solar energy industry.The solar energy and renewable energy industries are both highly competitive and continually evolving as participants strive to distinguish themselves within their markets and compete with the larger electric power industry. We believe our main sources of competition are other thin film PV manufacturers and companies developing other solar solutions, such as solar thermal and concentrated PV technologies.

Many of our existing and potential competitors have substantially greater financial, technical, manufacturing and other resources than we do. A competitor's greater size provides them with a competitive advantage because they often can realize economies of scale and purchase certain raw materials at lower prices. Many of our competitors also have greater brand name recognition, established distribution networks and large customer bases. In addition, many of our competitors have well-established relationships with our current and potential partners and distributors and have extensive knowledge of our target markets. As a result of their greater size, these competitors may be able to devote more resources to the research, development, promotion and sale of their products or respond more quickly to evolving industry standards and changes in market conditions than we can. Our failure to adapt to changing market conditions and to compete successfully with existing or future competitors could materially and adversely affect our business, results of operations and financial condition.

Problems with product quality or performance may cause us to incur warranty expenses, damage our market reputation and prevent us from maintaining or increasing our market share.If our products fail to perform as expected while under warranty, or if we are unable to support the warranties, sales of our products may be adversely affected or our costs may increase, and our business, results of operations and financial condition could be materially and adversely affected.

We may also be subject to warranty or product liability claims against us that are not covered by insurance or are in excess of our available insurance limits. In addition, quality issues can have various other ramifications, including delays in the recognition of revenue, loss of revenue, loss of future sales opportunities, increased costs associated with repairing or replacing products, and a negative impact on our goodwill and reputation. The possibility of future product failures could cause us to incur substantial expenses to repair or replace defective products. Furthermore, widespread product failures may damage our market reputation and reduce our market share causing sales to decline.

Currency translation risk may negatively affect our net sales, cost of equipment, cost of sales, gross margin or profitability and could result in exchange losses.Although our reporting currency is the U.S. dollar, we may conduct business and incur costs in the local currencies of other countries in which we operate, make sales or buy equipment or materials. As a result, we are subject to currency translation risk. Our future contracts and obligations may be exposed to fluctuations in currency exchange rates, and, as a result, our capital expenditures or other costs may exceed what we have budgeted. Further, changes in exchange rates between foreign currencies and the U.S. dollar could affect our net sales and cost of sales and could result in exchange losses. We cannot accurately predict future exchange rates or the overall impact of future exchange rate fluctuations on our business, results of operations and financial condition.

A significant increase in the price of our raw materials could lead to higher overall costs of production, which would negatively affect our planned product margins, or make our products uncompetitive in the PV market.Our raw materials include high temperature plastics and various metals. Significant increases in the costs of these raw materials may impact our ability to compete in our target markets at a price sufficient to produce a profit.

Our intellectual property rights or our means of enforcing those rights may be inadequate to protect our business, which may result in the unauthorized use of our products or reduced sales or otherwise reduce our ability to compete.Our business and competitive position depends upon our ability to protect our intellectual property rights and proprietary technology, including any PV modules that we develop. We attempt to protect our intellectual property rights, primarily in the United States, through a combination of patent, trade secret and other intellectual property laws, as well as licensing agreements and third-party nondisclosure and assignment agreements. Because of the differences in foreign patent and other laws concerning intellectual property rights, our intellectual property rights may not receive the same degree of protection in foreign countries as they would in the United States. Our failure to obtain or maintain adequate protection of our intellectual property rights, for any reason, could have a materially adverse effect on our business, results of operations and financial condition. Further, any patents issued in connection with our efforts to develop new technology for PV modules may not be broad enough to protect all of the potential uses of our technology.

We also rely on unpatented proprietary technology. It is possible others will independently develop the same or similar technology or otherwise obtain access to our unpatented technology. To protect our trade secrets and other proprietary information, we require our employees, consultants and advisors to execute proprietary information and invention assignment agreements when they begin working for us. We cannot assure these agreements will provide meaningful protection of our trade secrets, unauthorized use, misappropriation or disclosure of trade secrets, know how or other proprietary information. Despite our efforts to protect this information, unauthorized parties may attempt to obtain and use information that we regard

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as proprietary. If we are unable to maintain the proprietary nature of our technologies, we could be materially adversely affected.

In addition, when others control the prosecution, maintenance and enforcement of certain important intellectual property, such as technology licensed to us, the protection and enforcement of the intellectual property rights may be outside of our control. If the entity that controls intellectual property rights that are licensed to us does not adequately protect those rights, our rights may be impaired, which may impact our ability to develop, market and commercialize our products. Further, if we breach the terms of any license agreement pursuant to which a third party licenses us intellectual property rights, our rights under that license may be affected and we may not be able to continue to use the licensed intellectual property rights, which could adversely affect our ability to develop, market and commercialize our products.

Third-party claims of intellectual property infringement may negatively impact the Company and the Company's future financial results. The Company's commercial success depends in part on its ability to develop, manufacture, market and sell its products and use its proprietary technology without infringing the patent rights of third parties. Numerous third-party U.S. and non-U.S. issued patents and pending applications exist in the area of the Company's products. The Company may in the future pursue available proceedings in the U.S. and foreign patent offices to challenge the validity of patents and patent applications. In addition, or alternatively, the Company may consider whether to seek to negotiate a license of rights to technology covered by one or more of such patents and patent applications. If any patents or patent applications cover the Company's products or technologies, the Company may not be free to manufacture or market its products as planned, absent such a license, which may not be available to the Company on commercially reasonable terms, or at all.

It is also possible that the Company has failed to identify relevant third-party patents or applications. For example, some applications may be held under government secrecy and US patent applications that will not be filed outside the United States remain confidential unless and until patents issue. Moreover, it is difficult for industry participants, including the Company, to identify all third-party patent rights that may be relevant to its product candidates and technologies because patent searching is imperfect due to differences in terminology among patents, incomplete databases and the difficulty in assessing the meaning of patent claims. The Company may fail to identify relevant patents or patent applications or may identify pending patent applications of potential interest but incorrectly predict the likelihood that such patents may issue with claims of relevance to its technology. In addition, the Company may be unaware of one or more issued patents that would be infringed by the manufacture, sale or use of a current or future products, or the Company may incorrectly conclude that a third-party patent is invalid, unenforceable or not infringed by its activities. Additionally, pending patent applications that have been published can, subject to specified limitations, be later amended in a manner that could cover the Company's technologies, its products or the use of its products.

There have been many lawsuits and other proceedings filed by third parties involving patent and other intellectual property rights, including patent infringement lawsuits, interferences, oppositions, and reexamination, post-grant review and equivalent proceedings before the USPTO and corresponding foreign patent offices. Numerous U.S. and foreign issued patents and pending patent applications, which are owned by third parties, exist in the fields in which the Company is developing products or has existing products. As the industries the Company is involved in expand and more patents are issued, the risk increases that its product candidates may be subject to claims of infringement of the patent rights of third parties.

Parties making claims against the Company may obtain injunctive or other equitable relief, which could effectively block its ability to further develop and commercialize the Company's products. Defense of these claims, regardless of their merit, would involve substantial litigation expense and would be a substantial diversion of employee resources from the Company's business. In the event of a successful claim of infringement against the Company, the Company may have to pay substantial damages, including treble damages and attorneys' fees for willful infringement, pay royalties, redesign its infringing products or obtain one or more licenses from third parties, which may be impossible or require substantial time and monetary expenditure.

Our future success depends on retaining our Chief Executive Officer and existing management team and hiring and assimilating new key employees, and our inability to attract or retain key personnel would materially harm our business and results of operations.Our success depends on the continuing efforts and abilities of our executive officers, including Mr. Paul Warley, our President and Chief Executive Officer, our other executive officers, and key technical personnel. Our future success also will depend on our ability to attract and retain highly skilled employees, including management, technical and sales personnel. The loss of any of our key personnel, the inability to attract, retain or assimilate key personnel in the future, or delays in hiring required personnel could materially harm our business, results of operations and financial condition.

Our PV modules contain limited amounts of cadmium and claims of human exposure or future regulations could have a material adverse effect on our business, results of operations and financial condition.Our PV modules contain

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limited amounts of cadmium, which is regulated as a hazardous material due to the adverse health effects that may arise from human exposure and is banned in certain countries. We cannot assure you that human or environmental exposure to cadmium used in our PV modules will not occur. Any such exposure could result in third party claims against us, damage to our reputation and heightened regulatory scrutiny of our PV modules. Future regulation relating to the use of cadmium in various products could force us to seek regulatory exemptions or impact the manufacture and sale of our PV modules and could require us to incur unforeseen environmental related costs. The occurrence of future events such as these could limit our ability to sell and distribute our PV modules, and could have a material adverse effect on our business, results of operations and financial condition.

Environmental obligations and liabilities could have a substantial negative impact on our financial condition, cash flows and profitability.We are subject to a variety of federal, state, local and foreign laws and regulations relating to the protection of the environment, including those governing the use, handling, generation, processing, storage, transportation and disposal of, or human exposure to, hazardous and toxic materials (such as the cadmium used in our products), the discharge of pollutants into the air and water, and occupational health and safety. We are also subject to environmental laws which allow regulatory authorities to compel, or seek reimbursement for, cleanup of environmental contamination at sites now or formerly owned or operated by us and at facilities where our waste is or has been disposed. We may incur significant costs and capital expenditures in complying with these laws and regulations. In addition, violations of, or liabilities under, environmental laws or permits may result in restrictions being imposed on our operating activities or in our being subjected to substantial fines, penalties, criminal proceedings, third party property damage or personal injury claims, cleanup costs or other costs. Also, future developments such as more aggressive enforcement policies, the implementation of new, more stringent laws and regulations, or the discovery of presently unknown environmental conditions or noncompliance may require expenditures that could have a material adverse effect on our business, results of operations and financial condition. Further, greenhouse gas emissions have increasingly become the subject of international, national, state and local attention. Although future regulations could potentially lead to an increased use of alternative energy, there can be no guarantee that such future regulations will encourage solar technology. Given our limited history of operations, it is difficult to predict future environmental expenses.

We have agreements with international parties that subject us to a number of risks, including potential unfavorable political, regulatory, labor, legal and tax conditions in foreign countries.We conduct business with international parties and, in the future, may look to expand our operations abroad and, as a result, we may be subject to the legal, political, social and regulatory requirements and economic conditions of foreign jurisdictions. Risks inherent to international operations, include, but are not limited to, the following:

Our business in foreign markets will require us to respond to rapid changes in market conditions in these countries. Our overall success as an international business depends, in part, on our ability to succeed in differing legal, regulatory, economic, social and political conditions. If we are not able to develop and implement policies and strategies that are effective in each

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location where we will do business, then our business, results of operations and financial condition could be materially and adversely affected.

Existing regulations and policies and changes to these regulations and policies may present technical, regulatory and economic barriers to the purchase and use of PV products, which may significantly reduce demand for our PV products.The market for electricity generation products is heavily influenced by foreign, U.S., state and local government regulations and policies concerning the electric utility industry, as well as policies promulgated by electric utilities. These regulations and policies often relate to electricity pricing and technical interconnection of customer owned electricity generation. In the United States and in a number of other countries, these regulations and policies have been modified in the past and may be modified again in the future. These regulations and policies could deter end user purchases of PV products and investment in the research and development of PV technology. For example, without a mandated regulatory exception for PV systems, utility customers are often charged interconnection or standby fees for putting distributed power generation on the electric utility grid. These fees could increase the cost to our end users of using PV systems and make them less desirable, thereby harming our business, prospects, results of operations and financial condition. In addition, electricity generated by PV systems mostly competes with expensive peak hour electricity, rather than the less expensive average price of electricity. Modifications to the peak hour pricing policies of utilities, such as to a flat rate, would require PV systems to achieve lower prices in order to compete with the price of electricity from other sources.

We anticipate that our PV modules and their use in installations will be subject to oversight and regulation in accordance with national and local ordinances relating to building codes, safety, environmental protection, utility interconnection and metering and related matters. It is difficult to track the requirements of individual states and design equipment to comply with the varying standards. Any new government regulations or utility policies pertaining to PV modules may result in significant additional expenses to us, our business partners and their customers and, as a result, could cause a significant reduction in demand for our PV modules.

We may be subject to risks related to our information technology systems, including the risk that we may be the subject of a cyber-attack and the risk that we may be in non-compliance with applicable privacy laws. Our operations depend, in part, on how well we and our vendors protect networks, equipment, information technology (IT) systems, and software against damage from a number of threats, including, but not limited to, cable cuts, damage to physical plants, natural disasters, intentional damage and destruction, fire, power loss, hacking, computer viruses, vandalism, theft, malware, ransomware and phishing attacks. Any of these and other events could result in IT system failures, delays, or increases in capital expenses. Our operations also depend on the timely maintenance, upgrade, and replacement of networks, equipment, and IT systems and software, as well as preemptive expenses to mitigate the risks of failures. The failure of IT systems or a component of IT systems could, depending on the nature of any such failure, adversely impact our reputation and results of operations.

Risks Relating to our Securities and an Investment in our Common Stock

The price of our common stock may continue to be volatile.Our common stock is currently traded on the Nasdaq Capital Market. The trading price of our common stock from time to time has fluctuated widely and may be subject to similar volatility in the future. For example, during the period from January 1, 2025 through December 31, 2025, our common stock ranged from $1.165 to $5.06, and in 2024, our common stock ranged from $2.255 to $85.30 (all prices as adjusted for our prior reverse stock splits). The trading price of our common stock in the future may be affected by a number of factors, including events described in these Risk Factors. In recent years, broad stock market indices, in general, and smaller capitalization and PV companies, in particular, have experienced substantial price fluctuations. In a volatile market, we may experience wide fluctuations in the market price of our common stock. These fluctuations may have a negative effect on the market price of our common stock regardless of our operating performance. In the past, following periods of volatility in the market price of a company's securities, securities class action litigation has often been instituted. A securities class action suit against us could result in substantial costs, potential liabilities and the diversion of management's attention and resources and could have a material adverse effect on our financial condition.

As a public company we are subject to complex legal and accounting requirements that require us to incur substantial expenses, and our financial controls and procedures may not be sufficient to ensure timely and reliable reporting of financial information, which, as a public company, could materially harm our stock price and listing on Nasdaq Capital Market.As a public company, we are subject to numerous legal and accounting requirements that do not apply to private companies. The cost of compliance with many of these requirements is substantial, not only in absolute terms but, more importantly, in relation to the overall scope of the operations of a small company. Failure to comply with these requirements can have numerous adverse consequences including, but not limited to, our inability to file required periodic reports on a timely basis, loss of market confidence, delisting of our securities and/or governmental or private actions against us. We cannot assure you we will be able to comply with all of these requirements or the cost of such compliance will not prove to be a substantial competitive disadvantage vis-à-vis our privately held and larger public competitors.

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The Sarbanes-Oxley Act of 2002 ("Sarbanes-Oxley") requires, among other things, that we maintain effective internal control over financial reporting and disclosure controls and procedures. In particular, we must perform system and process evaluation and testing of our internal control over financial reporting to allow management to report on the effectiveness of our internal control over financial reporting, as required by Section 404 of Sarbanes-Oxley. Our compliance with Section 404 of Sarbanes-Oxley will require we incur substantial accounting expense and expend significant management efforts. The effectiveness of our controls and procedures may, in the future, be limited by a variety of factors, including:

If we are not able to comply with the requirements of Section 404 in a timely manner, or if we or our independent registered public accounting firm, identifies deficiencies in our internal control over financial reporting that are deemed to be material weaknesses, we may be subject to Nasdaq Capital market delisting, investigations by the SEC and civil or criminal sanctions.

Our ability to successfully implement our business plan and comply with Section 404 requires us to be able to prepare timely and accurate financial statements. We expect we will need to continue to improve existing, and implement new operational, financial and accounting systems, procedures and controls to manage our business effectively.

Any delay in the implementation of, or disruption in the transition to, new or enhanced systems, procedures or controls may cause our operations to suffer, and we may be unable to conclude that our internal control over financial reporting is effective as required under Section 404 of Sarbanes-Oxley. If we are unable to complete the required Section 404 assessment as to the adequacy of our internal control over financial reporting, if we fail to maintain or implement adequate controls, our ability to obtain additional financing could be impaired. In addition, investors could lose confidence in the reliability of our internal control over financial reporting and in the accuracy of our periodic reports filed under the Securities Exchange Act of 1934, as amended ("Exchange Act"). A lack of investor confidence in the reliability and accuracy of our public reporting could cause our stock price to decline.

Our stockholders may experience significant dilution as a result of shares of our common stock that may be issued (i) upon the exercise or conversion of our derivative securities including convertible preferred stock and warrants, and (ii) pursuant to new securities that we may issue in the future. We may issue substantial amounts of additional common stock in connection with the exercise or conversion of our derivative securities including convertible preferred stock and warrants.

If we obtain additional financing involving the issuance of equity securities or securities convertible or exercisable for equity securities, our existing stockholders' investment would be further diluted. Such dilution could cause the market price of our common stock to decline, which could impair our ability to raise additional financing. Depending on market liquidity at the time, sales of such newly issued additional shares into the market may cause the trading price of our common stock to fall.

Sales of a significant number of shares of our common stock in the public markets or significant short sales of our stock, or the perception that such sales could occur, could depress the market price of our common stock and impair our ability to raise capital.Substantially all of our outstanding shares (and substantially all of the shares underlying our outstanding derivative securities), unless held by our affiliates, may be resold in the public market immediately without restriction. Shares held by our affiliates may be resold into the public market subject to compliance with the requirements of the SEC's Rule 144. Sales of a substantial number of shares of our common stock or other equity-related securities in the public markets could depress the market price of our common stock. If there are significant short sales of our stock, the price decline that could result from this activity may cause the share price to decline more so, which, in turn, may cause long holders of the stock to sell their shares, thereby contributing to sales of stock in the market. Such sales also may impair our ability to raise capital through the sale of additional equity securities in the future at a time and price that our management deems acceptable, if at all.

We may fail to continue to meet the listing standards of The Nasdaq Capital Market. Failure to maintain the listing of our common stock with a U.S. national securities exchange could adversely affect the liquidity off our common stock.

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Our common stock is currently listed on The Nasdaq Capital Market. In order to maintain that listing, we must satisfy minimum financial and other continued listing requirements and standards.

During 2023 and 2024, the Company received notices from Nasdaq indicating that the Company was not in compliance with (i) Nasdaq Listing Rule 5550(b)(1), which requires companies listed on The Nasdaq Stock Market to maintain a minimum of $2,500,000 in stockholders' equity for continued listing, and (ii) Nasdaq Listing Rule 5550(a)(2) which requires companies listed on The Nasdaq Stock Market to maintain a minimum of a $1.00 bid price for continued listing.

In September 2024, the Company received written notice from Nasdaq indicating that the Company had regained compliance with the bid price requirement and the equity requirement. The Company was subjected to a one year Nasdaq Listing Panel Monitor.

If we fail in the future to satisfy the continued listing requirements of Nasdaq, Nasdaq may take steps to delist our securities. Such a delisting would likely have a negative effect on the price and liquidity of our common stock and would impair your ability to sell or purchase our common stock when you wish to do so. In the event of a delisting, we would take actions to restore our compliance with Nasdaq's listing requirements, but we can provide no assurance that any such action taken by us would allow our common stock to become listed again, stabilize the market price or improve the liquidity of our securities, prevent our common stock from dropping below the Nasdaq minimum share price requirement or prevent future non-compliance with Nasdaq's listing requirements.

If our common stock were to be delisted from Nasdaq, our common stock could begin to trade on one of the markets operated by OTC Markets Group, including OTCQX, OTCQB or OTC Pink (formerly known as the "pink sheets"), as the case may be. In such event, our common stock could be subject to the "penny stock" rules which, among other things, require brokers or dealers to approve investors' accounts, receive written agreements and determine investor suitability for transactions and disclose risks relating to investing in the penny stock market. Any such delisting of our common stock could have an adverse effect on the market price of, and the efficiency of the trading market for our common stock, not only in terms of the number of shares that can be bought and sold at a given price, but also through delays in the timing of transactions and less coverage of us by securities analysts, if any. Also, if in the future we were to determine that we need to seek additional equity capital, it could have an adverse effect on our ability to raise capital in the public or private equity markets. In addition, there can be no assurance that our common stock would be eligible for trading on any such alternative exchange or markets.

Delisting from Nasdaq could adversely affect our ability to raise additional financing through public or private sales of equity securities, would significantly affect the ability of investors to trade our securities and would negatively affect the value and liquidity of our common stock. Delisting could also have other negative results, including the potential loss of confidence by employees, the loss of institutional investor interest and fewer business development opportunities.

Some provisions of our charter documents and Delaware law may have anti-takeover effects that could discourage an acquisition of us by others, even if an acquisition would be beneficial to our stockholders, and may prevent attempts by our stockholders to replace or remove our current management.Provisions in our Certificate of Incorporation and Bylaws, each as amended, as well as provisions of Delaware law, could make it more difficult for a third party to acquire us, or for a change in the composition of our Board of Directors (our "Board") or management to occur, even if doing so would benefit our stockholders. These provisions include:

In addition, we are subject to Section 203 of the Delaware General Corporation Law, which generally prohibits a Delaware corporation from engaging in any of a broad range of business combinations with an interested stockholder for a period of three years following the date on which the stockholder became an interested stockholder, unless such transactions are approved by our Board. This provision could have the effect of delaying or preventing a change of control, whether or not it is desired by, or beneficial to, our stockholders.

Item 1B. Unresolved Staff Comments

None.

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Item 1C. Cybersecurity

Item 2. Properties

Our principal business office and manufacturing facility is located in a leased space at 12300 Grant Street, Thornton, Colorado 80241. We have approximately 25,000 square feet of fully equipped office space and 50,000 square feet of fully equipped manufacturing space. We consider our space adequate for our current operations.

Item 3. LegalProceedings

Details of the Company's legal proceedings are included "Note 17 - Commitments and Contingencies" to our financial statements included in this Annual Report on Form 10-K.

Item 4. Mine Safety Disclosures

Not applicable.

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PARTII

Item 5. Market for Registrant's Common Equity, Related Stockholder Matters and Issuer Purchases of Equity Securities

Market Information

On August 24, 2022, our common stock began trading on the Nasdaq Capital Market. Our trading symbol is "ASTI."

Holders

As of December 31, 2025, the number of record holders of our common stock was 43. Because many of our shares of common stock are held by brokers and other institutions on behalf of stockholders, we are unable to estimate the total number of stockholders represented by these record holders.

Dividends

The holders of common stock are entitled to receive such dividends as may be declared by our Board of Directors. During the years ended December 31, 2025 and 2024, we did not pay any common stock dividends, and we do not expect to declare or pay any dividends in the foreseeable future. Payment of future dividends will be within the discretion of our Board of Directors and will depend on, among other factors, our retained earnings, capital requirements, and operating and financial condition.

Recent Sales of Unregistered Securities

During the year ended December 31, 2025, all sales of unregistered securities by the Company have been previously reported on a Form 8-K or Form 10-Q.

Issuer Purchases of Equity Securities

We did not repurchase any of our equity securities during the period covered by this Annual Report.

Item 6. [Reserved]

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Item 7. Management's Discussion and Analysis ofFinancial Condition and Results of Operations

The following discussion of our financial condition and results of operations should be read in conjunction with our audited financial statements and the notes to those financial statements appearing elsewhere in this Form 10-K. This discussion and analysis contain statements of a forward-looking nature relating to future events or our future financial performance. As a result of many factors, our actual results may differ materially from those anticipated in these forward-looking statements. These statements involve known and unknown risks, uncertainties and other factors that may cause our actual results, levels of activity, performance or achievements to be materially different from any future results, levels of activity, performance or achievements expressed or implied by these forward-looking statements.

Overview

We are a company formed to commercialize flexible PV modules using our proprietary technology. For the year ended December 31, 2025, we generated $76,773 of total revenue, all of which, were from product sales. As of December 31, 2025, we had an accumulated deficit of approximately $499,441,465.

Significant Trends, Uncertainties and Challenges

We believe the significant trends, uncertainties and challenges that directly or indirectly affect our financial performance and results of operations include:

Basis of Presentation:The discussion and analysis of our financial condition and results of operations are based on our financial statements, which have been prepared in accordance with accounting principles generally accepted in the United States ("US GAAP"). The preparation of these financial statements requires us to make estimates and judgments that affect the reported amounts of assets, liabilities, revenues and expenses, and related disclosure of contingent assets and liabilities. On an ongoing basis, we evaluate our estimates based on historical experience and on various other assumptions that are believed to be reasonable under the circumstances, the results of which form the basis for making judgments about the carrying values of assets and liabilities that are not readily apparent from other sources. Actual results may differ from these estimates under different assumptions or conditions. We have identified the policies below as critical to our business operations and to the understanding of our financial results:

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Significant Accounting Policies and Estimates

For information regarding the Company's critical and significant accounting policies, as well as recent accounting pronouncements, see Note 2 the financial statements within Item 15 of this Form 10-K.

The Company considers certain accounting estimates to be critical, as their application is made in accordance with generally accepted accounting principles that involve a significant level of estimation uncertainty and have had, or are reasonably likely to have, a material impact on the financial condition or results of operations. Detailed below is a discussion of why, to the extent the estimate is material, these estimates are subject to uncertainty and the sensitivity of the reported amounts to the methods and assumptions underlying the estimate's calculation.

Inventories:All inventories are stated at the lower of cost or net realizable value, with cost determined using the weighted average method. Inventory balances are frequently evaluated to ensure they do not exceed net realizable value. The computation for net realizable value takes into account many factors, including expected demand, product life cycle and development plans, module efficiency, quality issues, obsolescence and others. Management's judgment is required to determine reserves for obsolete or excess inventory. If actual demand and market conditions are less favorable than those estimated by management, additional inventory write downs may be required.

Impairment of Long-lived assets:We analyze our long-lived assets (property, plant and equipment) and definitive-lived intangible assets (patents) for impairment, both individually and as a group, whenever events or changes in circumstances indicate the carrying amount of the assets may not be recoverable. Events that might cause impairment would include significant current period operating or cash flow losses associated with the use of a long-lived asset or group of assets combined with a history of such losses, significant changes in the manner of use of assets and significant negative industry or economic trends. An undiscounted cash flow analysis is estimated to determine if an impairment exists. If an impairment is determined to exist, any related loss is calculated using the difference between the fair value (estimated using the undiscounted cash flows) and the carrying value of the assets.

Share-Based Compensation: The Company measures and recognizes compensation expense for all share-based payment awards made to employees, officers, directors, and consultants based on estimated fair values. The value of the portion of the award that is ultimately expected to vest, net of estimated forfeitures, is recognized as expense on a straight-line basis, over the requisite service period in the Company's Statements of Operations. Forfeitures are estimated at the time of grant and revised, as necessary, in subsequent periods if actual forfeitures differ from those estimates.

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Results of Operations

Comparison of the Years Ended December 31, 2025 and 2024

Revenues.Total revenues increased by $34,880, or by 83%, for the year ended December 31, 2025, when compared to the same period in 2024. This is primarily due to more customer orders in the current period compared to prior period.

Cost of revenues.Cost of revenues is comprised primarily of material costs, repair and maintenance, direct labor and overhead expenses. Our cost of revenues increased by $47,956, or 32% for the year ended December 31, 2025, when compared to the same period in 2024. The increase in cost of revenues is primarily due to the increase in product revenue.

Research, development and manufacturing operations.Research, development and manufacturing operations costs include costs incurred for product development, pre-production and production activities in our manufacturing facility. Research, development and manufacturing operations costs also include costs related to technology development. Research, development and manufacturing operations costs increased by $142,246 or 6%, for the year ended December 31, 2025, when compared to the same period in 2024. This is primarily due to an increase in research and development cost as the Company continued to focus on product and process improvements in the current period.

Selling, general and administrative.Selling, general and administrative expenses decreased by $408,333, or 9%, for the year ended December 31, 2025, when compared to the same period in 2024. This decrease is primarily due to lower personnel and professional service costs incurred during the current year compared to the prior period.

Share-based compensation. Share-based compensation expense decreased by $109,205 or 11%, for the year ended December 31, 2025, when compared to the same period in 2024. The increase is primarily due to the Company's stock option grant to employees, directors, and advisory board in August 2024 and June 2025, partially offset by lower restricted stock unit expenses in current period.

Impairment loss. The impairment loss decreased by $524,481 or 100%. The Company recognized an impairment loss of $524,481 as part of the agreement to sell the manufacturing assets purchased in Switzerland (see Note 4) during the year ended December 31, 2024. During the current period, no impairment loss was recognized.

Other Income/(Expense).Other expense decreased by $632,943 or 107%, for the year ended December 31, 2025 when compared to the same period in 2024. During December 31, 2024, other expense was primarily comprised of other income of

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approximately $541,000 for the reversal of liabilities related to the Flisom assets (see Note 4) and approximately $165,500 in other income for the settlement of a note payable to a vendor (see Note 8) that were not repeated in the current period. This income was offset by a one-time warrant settlement expense for the repurchase of fully ratcheting warrants sold to investors and higher interest expense due to more debt in the previous year compared to the current year.

Net Income/(Loss).Our Net Loss was $7,832,755 for the year ended December 31, 2025, compared to Net Loss of $9,130,274 for the year ended December 31, 2024, a decrease of $1,297,519. The decrease is primarily due to the reasons described above.

Liquidity and Capital Resources

The Company has limited industrial scale production capabilities in its Thornton facility and continues to focus on its research and development activities to improve its PV products. The Company does not expect that sales revenue and cash flows will be sufficient to support operations and cash requirements until it has fully implemented our strategy of focusing on selling high value PV products and manufacturing at full industrial scale. During the year ended December 31, 2025, the Company used $6,903,966 in cash for operations.

Additionally, projected revenues are not anticipated to result in a positive cash flow position for the year 2025 overall and, although as of December 31, 2025, the Company has working capital of $1,178,902, Management believes that additional financing will be required for the Company to reach a level of sufficient sales to achieve profitability.

The Company continues to accelerate sales and marketing efforts related to its specialty PV application strategies through expansion of its sales and distribution channels. The Company continues activities to secure additional financing through strategic or financial investors, but there is no assurance the Company will be able to raise additional capital on acceptable terms or at all. If the Company's revenues do not increase rapidly, and/or additional financing is not obtained, the Company will be required to significantly curtail operations to reduce costs and/or sell assets. Such actions would likely have an adverse impact on the Company's future operations.

As a result of the Company's recurring losses from operations, and the need for additional financing to fund its operating and capital requirements, there is uncertainty regarding the Company's ability to maintain liquidity sufficient to operate its business effectively, which raises substantial doubt as to the Company's ability to continue as a going concern.

Management cannot provide any assurances that the Company will be successful in accomplishing any of its plans. These financial statements do not include any adjustments that might be necessary should the Company be unable to continue as a going concern.

Statements of Cash Flows Comparison of the Years Ended December 31, 2025 and 2024

For the year ended December 31, 2025, our cash used in operations was $6,903,966 compared to $8,423,569 for the year ended December 31, 2024, a decrease of $1,519,603. The decrease is due primarily to timing of cash flows and decreased expenses. For the year ended December 31, 2025, cash used in investing activities was $107,015 compared to cash used in investing activities of $421 for the year ended December 31, 2024. The increase was primarily due to the purchase of a cost investment and fixed assets. During the year ended December 31, 2025, cash used in operations of $6,903,966 were primarily funded from 2025 and 2024 financing agreements. For the year ended December 31, 2025, our cash provided by financing activities was $6,626,731 compared to $10,546,000 for the year ended December 31, 2024, a decrease of $3,919,269. Cash provided by financing activities in 2025 was primarily derived from common stock sales under an at the market agreement, public and private stock offerings, and warrant exercises. Cash provided by financing activities in 2024 was primarily derived from common stock sales under an at the market agreement, public and private equity offerings and a series of bridge loans partially offset by loan and debt repayments and the repurchase of fully ratcheting warrants.

Off Balance Sheet Transactions

As of December 31, 2025, we did not have any off-balance sheet arrangements as defined in Item 303(a)(4)(ii) of Regulation S-K.

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Item 7A. Quantitative and Qualitative Disclosures About Market Risk

Foreign Currency Exchange Risk

Although our reporting currency is the U.S. Dollar, we may conduct business and incur costs in the local currencies of other countries in which we may operate, make sales and buy materials. As a result, we are subject to currency translation risk. Further, changes in exchange rates between foreign currencies and the U.S. Dollar could affect our future net sales and cost of sales and could result in exchange losses.

We currently do not engage in hedging transactions to reduce our exposure to changes in currency exchange rates, although, we may do so in the future.

We hold no significant funds and have no significant future obligations denominated in foreign currencies as of December 31, 2025.

Interest Rate Risk

Our exposure to market risks for changes in interest rates relates primarily to our cash equivalents and investment portfolio. As of December 31, 2025, our cash equivalents consisted of operating accounts held with financial institutions and investments in money market funds. From time to time, we may hold restricted funds, money market funds, investments in U.S. government securities and high-quality corporate securities. The primary objective of our investment activities is to preserve principal and provide liquidity on demand, while at the same time maximizing the income we receive from our investments without significantly increasing risk. The direct risk to us associated with fluctuating interest rates is limited to our investment portfolio, and we do not believe a change in interest rates will have a significant impact on our financial position, results of operations, or cash flows.

Item 8. Financial Statements and Supplementary Data

The Financial Statements and Supplementary Data required by this item are included in Part IV, Item 15(a)(1) and are presented beginning on Page F-1.

Item 9. Changes in and Disagreements with Accountants on Accounting and Financial Disclosure

None.

Item 9A. Controls and Procedures

Evaluation of Disclosure Controls and Procedures

We maintain disclosure controls and procedures designed to ensure that information required to be disclosed in our reports filed or submitted under the Securities Exchange Act of 1934, as amended (the "Exchange Act") is recorded, processed, summarized and reported within the time periods specified in Securities and Exchange Commission rules and forms. Our disclosure controls and procedures include, without limitation, controls and procedures designed to ensure that information required to be disclosed in our reports filed under the Exchange Act is accumulated and communicated to management as appropriate to allow timely decisions regarding required disclosures. Our management conducted an evaluation required by Rules 13a-15 and 15d-15 under the Exchange Act of the effectiveness of our disclosure controls and procedures as defined in Rules 13a-15 and 15d-15 under the Exchange Act as of December 31, 2025. Based on this evaluation, our management concluded the design and operation of our disclosure controls and procedures were effective as of December 31, 2025.

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Management's Report on Internal Control over Financial Reporting

Our management is responsible for establishing and maintaining adequate internal control over financial reporting, as defined in Rules 13a-15(f) and 15d-15(f) under the Exchange Act. Our system of internal control over financial reporting is designed to provide reasonable assurance regarding the reliability of financial reporting and the preparation of financial statements for external purposes in accordance with generally accepted accounting principles in the United States of America and includes those policies and procedures that:

Under the supervision of the Audit Committee of the Board of Directors and with the participation of our management, including our Chief Executive Officer, we conducted an evaluation of the effectiveness of our internal control over financial reporting using the criteria established in Internal Control - Integrated Framework (2013) issued by the Committee of Sponsoring Organizations of the Treadway Commission (COSO). Based on this evaluation, our management concluded our internal control over financial reporting were effective as of December 31, 2025. Our management reviewed the results of its assessment with the Audit Committee.

Because of its inherent limitations, internal control over financial reporting may not prevent or detect misstatements. Also, projections of any evaluation of effectiveness to future periods are subject to the risk that controls may become inadequate because of changes in conditions, or that the degree of compliance with the policies or procedures may deteriorate.

Changes in Internal Control Over Financial Reporting

There were no changes to our internal control over financial reporting during the year ended December 31, 2025, that have materially affected, or are reasonably likely to materially affect, our internal control over financial reporting.

Item 9B. OtherInformation

During the period ended December 31, 2025, nodirector or officer adopted or terminated any Rule 10b5-1 trading arrangement or non-Rule 10b5-1 trading arrangement, as each term is defined in Item 408(a) of Regulation S-K.

Item 9C. Disclosure Regarding Foreign Jurisdictions that Prevent Inspections

Not applicable.

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PARTIII

Item 10. Directors, Executive Officers and Corporate Governance

EXECUTIVE OFFICERS AND DIRECTORS

Our executive officers, continuing directors and director nominees, their ages and positions with us as of March 20, 2026, are as follows:

Paul Warley has been Chief Executive Officer of the Company since May 2, 2023. Prior to then, Mr. Warley served as our Chief Financial Officer from December 2022 to May 2023 and was elected to our Board in December 2023. Mr. Warley has significant experience in corporate turnarounds, restructuring, cross-border trade and capital advisory work. From 2015 to 2022, Mr. Warley was president of Warley & Company LLC, a strategic advisory firm providing executive management, capital advisory and M&A services to middle-market companies in the service, construction, technology, oil & gas, clean energy, food, retail and green-building sectors. While at Warley & Company, from 2018 to 2019 Mr. Warley was engaged as Chief Executive Officer and CFO of 360 Imaging, a provider of products and services for implant surgery and digital dentistry. From 2011 to 2015, Mr. Warley served clients in the alternative energy industry as a managing director and additionally was Chief Compliance Officer with Deloitte Corporate Finance. From 1997 to 2011, Mr. Warley was Managing Director and Region Manager for GE Capital. From 1984 to 1997, Mr. Warley was with Bank of America and Bankers Trust as a Senior Vice President. Mr. Warley holds the Financial Industry Regulatory Authority Series 7, 24 and 63 licenses. He earned his B.S. degree in Business Administration from The Citadel (The Military College of South Carolina) and served in the U.S. Army, attaining the rank of Captain. While at Warley & Company LLC, Mr. Warley provided corporate finance consulting services to BD1 Investment Holding LLC, previously a significant stockholder of the Company. We believe Mr. Warley is well-qualified to serve as our CEO and as a Director due to his business experience.

Jin Jo has been Chief Financial Officer of the Company since May 2023. Ms. Jo joined the Company in June 2021 as Financial Controller. Ms. Jo has over 20 years of experience in accounting. From 2015 to 2021, Ms. Jo was the head of technical accounting of Empower Retirement, a financial services company, where her primary focus was accounting research for complex new products, investments and transactions, and new accounting standards implementation on International Financial Reporting Standards, US GAAP and insurance Statutory Accounting Principles. From 2011 to 2015, Ms. Jo was an Inspection Specialist at the Public Company Accounting Oversight Board where she assessed auditor compliance with audit professional standards. Ms. Jo started her career in public accounting, spending 11 years in the audit and assurance practice serving both public and private companies.

Ms. Jo is a certified public accountant in the state of Colorado and earned her B.S. degree in Business Administration from the University of Colorado, Boulder. We believe Ms. Jo is well-qualified to serve as our CFO due to her business, financial and accounting experience.

Bobby Gulati has been Chief Operating Officer since May 2023. He has over 30 years of executive leadership experience in engineering and manufacturing roles. Mr. Gulati joined the Company in February 2012 as Head Equipment Engineer. In March 2014, he was promoted to Director of Equipment Engineering with emphasis on International Business Development. In 2020, Mr. Gulati was promoted to Chief Information Officer.

From 2010 to 2012 Mr. Gulati was the Director of Equipment Engineering for Twin Creeks Technologies, an amorphous silicon solar manufacturing company, and was responsible for the operations of the 5MW solar cell manufacturing facility in Senatobia, Mississippi. From 2001 to 2010, Mr. Gulati was the co-founder and President of TriStar Systems, a manufacturer of automated manufacturing and assembly equipment for the solar, aerospace and disk drive industries. From 1992 to 2000, Mr. Gulati was the co-founder and Chief Operating Officer of the publicly traded company NexStar Automation, whose focus was designing and building automated production equipment for the semiconductor and medical disposable industries. Mr. Gulati earned his B.S. degree in Electrical Engineering with a minor in Computer Science and Robotics from the University of Colorado, Denver. We believe Mr. Gulati is well-qualified to serve as our COO due to his business and management experience.

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David Petersonhas served on our Board since December 2020, and has been Chairman of the Board since September 2022. Mr. Peterson has over 25 years of business management experience, including 9 years as a private equity investor, 6 years as a manager at an engineering consulting firm, and over 20 years of board experience. From January 2024 to present, Mr. Peterson has worked for Clean H2, Inc., a distributor of hydrogen electrolyzers, where he serves as the CEO for the Centennial, Colorado based company. From 2015 to 2023, Mr. Peterson worked for EPD Consultants, Inc., a privately held engineering firm headquartered in Carson, California, where he served as Senior Project Manager. From 2010 to 2015, Mr. Peterson was President and Co-Founder of Great Circle Industries, Inc., a water recycling company in southern California. His past experience includes being a board member at AIR-serv, LLC, a tire inflation vending machine manufacturer, and at American Water Investments, LLC, which provided bottled water delivery and water softening services, where Mr. Peterson also served as Interim CFO and President. Mr. Peterson has an MBA degree from the Marshall School of Business at the University of Southern California, and a B.A. from the University of California, Santa Cruz. We believe Mr. Peterson is well-qualified to serve as a director due to his extensive management and board experience.

Forrest Reynoldshas served on our Board since September 2022. He has over 30 years of business and management experience and is currently the Managing Partner of CalTex Capital, LLC, a privately held, Texas based, investment firm. Previously, Mr. Reynolds served as the Chief Restructuring Officer for Centaur Gaming, LLC, a gaming development company located in Indianapolis, Indiana. In this capacity, Mr. Reynolds managed a $1.0 billion Chapter 11 bankruptcy reorganization for the company. Prior to that, Mr. Reynolds worked in the investment banking industry for over 14 years holding various positions with several multinational investment banks including Credit Suisse, BT Alex Brown (later Deutsche Bank) and UBS. Mr. Reynolds sits on the board of several private companies and is actively involved with several charitable organizations. Mr. Reynolds graduated from The University of Texas at Austin where he received a B.B.A. in Finance and a B.A. in Economics. We believe Mr. Reynolds is well-qualified to serve as a director due to his knowledge and business experience.

Louis Berezovskyhas served on our Board since September 2022. He joined Eagle Infrastructure Services in July 2013 and leads the Finance and Accounting, M&A, Human Resources, Legal and IT functions. He has more than 30 years of experience in senior financial management positions across a variety of industries including 28 years of working in private equity sponsored portfolio companies. His accomplishments include the completion more than 60 acquisitions as well as multiple recapitalizations and successful sale processes. Prior to joining Eagle, Mr. Berezovsky served as Executive Vice President and Chief Financial Officer of ABRA Auto Body and Glass, Chief Financial Officer of ConvergeOne, and Chief Financial Officer of AIR-serv.

After receiving his B.S. in Accounting from the University of Minnesota, Carlson School of Management, he began his career at a Minneapolis based CPA firm. He is a Certified Management Accountant (CMA). He has also served as a member of the Board of Directors and as the Chairman of the Finance Committee for the Better Business Bureau of Minnesota and North Dakota since 2012. We believe Mr. Berezovsky is well-qualified to serve as a director due to his knowledge and business experience.

Gregory Thompsonhas served on our Board since April 2023. He is a four-time public company CFO with extensive global experience across several industries including technology, manufacturing, chemicals, building products, medical equipment, software and services, and public accounting. From December 2018 through June 2021, Mr. Thompson was EVP and CFO of KEMET Corporation (NYSE: KEM), a manufacturer of a broad selection of capacitor technologies, and a variety of other passive electronic components. In June 2020, KEMET was acquired by Yageo Corporation for approximately $1.8 billion. From 2008 to 2016, Mr. Thompson was EVP and CFO of Axiall Corporation (NYSE: AXLL), a manufacturer and marketer of chlorovinyls and aromatics (acetone, cumene, phenol). Axiall was sold to Westlake Chemical Corporation in late 2016. Prior to Axiall, Mr. Thompson was CFO of medical equipment manufacturer Invacare Corporation (NYSE: IVC) from 2002 to 2008, CFO of Sensormatic Electronics Corporation from 2000 to 2002, and Corporate Controller of Sensormatic from 1997 to 2000. Previously at Wang Laboratories, Inc. Mr. Thompson served as Vice President and Corporate Controller from 1994 to 1997 and Assistant controller from 1990 to 1994. He began his career at Price Waterhouse and Coopers & Lybrand where he spent 13 years serving international clients in industries including chemicals, construction, distribution, manufacturing, metals, retail, and technology.

Mr. Thompson earned a Bachelor of Science, Accounting from Virginia Tech in 1977. He is a Certified Public Accountant, and a Member of the American Institute of Certified Public Accountants. We believe Mr. Thompson is well-qualified to serve as a director due to his knowledge and business experience.

Section 16(a) Beneficial Ownership Reporting Compliance

Section 16(a) of the Exchange Act requires our directors, executive officers, and persons holding more than 10% of our common stock to report their initial ownership of the common stock and other equity securities and any changes in that

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ownership in reports that must be filed with the SEC. The SEC has designated specific deadlines for these reports, and we must identify in our Annual Report on Form 10-K those persons who did not file these reports when due.

Based solely on a review of reports furnished to us, or written representations from reporting persons, we believe all directors, executive officers, and 10% owners timely filed all reports regarding transactions in our securities required to be filed in 2025 by Section 16(a) under the Exchange Act, except that Forrest Reynolds filed one late Form 4 in 2025.

CORPORATE GOVERNANCE

Overview

Our Bylaws provide that the size of our Board of Directors is to be determined from time to time by resolution of the Board of Directors, but shall consist of at least two and no more than nine members. Our Board of Directors currently consists of five members. The Board has determined that the following directors are "independent" as required by the listing standards of the Nasdaq Capital Market and by our corporate governance guidelines: Mr. Peterson, Mr. Reynolds, Mr. Berezovsky and Mr. Thompson.

Our Certificate of Incorporation provides that the Board of Directors will be divided into three classes. Our Class A directors are Forrest Reynolds and Louis Berezovsky. Our Class B directors are Paul Warley and Gregory Thompson. Our Class C director is David Peterson.

Board Leadership Structure and Role in Risk Oversight

Our corporate governance guidelines provide that unless the board chair is an independent director, the board shall appoint a Lead Independent Director. The Lead Independent Director chairs the executive sessions of the independent directors, coordinates the activities of the other independent directors and performs such other duties as deemed necessary by the board from time to time. Our Chairman is independent and as such, no Lead Independent Director has been appointed.

Risk is inherent with every business, and how well a business manages risk can ultimately determine its success. We face a number of risks, including credit risk, interest rate risk, liquidity risk, operational risk, strategic risk and reputation risk. Management is responsible for the day-to-day management of risks we face, while the Board, as a whole and through its committees, has responsibility for the oversight of risk management. In its risk oversight role, the Board of Directors has the responsibility to satisfy itself that the risk management processes designed and implemented by management are adequate and functioning as designed. To do this, the Chairman of the Board meets regularly with management to discuss strategy and the risks we face. In addition, the Audit Committee regularly monitors our enterprise risk, including financial risks, through reports from management. Senior management attends the Board meetings and is available to address any questions or concerns raised by the Board on risk management and any other matters. The Chairman of the Board and independent members of the Board work together to provide strong, independent oversight of our management and affairs through the Board's standing committees and, when necessary, executive sessions of the independent directors.

Committees of the Board of Directors

Our Board has three standing committees: an Audit Committee, a Compensation Committee, and a Nominating and Governance Committee. Each committee operates pursuant to a charter. The charters of the Audit Committee, the Compensation Committee, and the Nominating and Governance Committee can be found on our website www.ascentsolar.com.

Audit Committee. Our Audit Committee oversees our accounting and financial reporting processes, internal systems of accounting and financial controls, relationships with independent auditors, and audits of financial statements. Specific responsibilities include the following:

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Our Audit Committee is comprised of Mr. Berezovsky, Mr. Thompson and Mr. Reynolds. Mr. Berezovsky serves as Chairman of the Audit Committee. The Board has determined that all members of the Audit Committee are independent under the rules of the Nasdaq Capital Market, and that Mr. Berezovsky qualifies as an "audit committee financial expert," as defined by the rules of the SEC.

Compensation Committee. Our Compensation Committee assists our Board in determining the development plans and compensation of our officers, directors and employees. Specific responsibilities include the following:

The Compensation Committee reviews all components of compensation including base salary, bonus, equity compensation, benefits and other perquisites. In addition to reviewing competitive market values, the Compensation Committee also examines the total compensation mix, pay-for-performance relationship and how all elements, in the aggregate, comprise the executives' total compensation package. The CEO makes recommendations to the Compensation Committee from time to time regarding the appropriate mix and level of compensation for other officers. Those recommendations consider the objectives of our compensation philosophy and the range of compensation programs authorized by the Compensation Committee. The Compensation Committee may determine director compensation by reviewing peer group data. Although the Compensation Committee has the authority to retain outside third parties, it does not currently utilize any outside consultants. The Compensation Committee may delegate certain of its responsibilities, as it deems appropriate, to other committees or officers.

Our Compensation Committee is comprised of Mr. Peterson, Mr. Thompson and Mr. Reynolds. Mr. Reynolds serves as Chairman of the Compensation Committee.

Our Board has determined that all members of the Compensation Committee are independent under the rules of the Nasdaq Capital Market.

Nominating and Governance Committee. Our Nominating and Governance Committee assists our Board by identifying and recommending individuals qualified to become members of our Board, reviewing correspondence from our stockholders, and establishing, evaluating and overseeing our corporate governance guidelines. Specific responsibilities include the following:

Our Nominating and Governance Committee is comprised of Mr. Berezovsky, Mr. Thompson and Mr. Peterson. Mr. Thompson serves as Chairman of our Nominating and Governance Committee. Our Board has determined that all members of the Nominating and Governance Committee are independent under the rules of Nasdaq Capital Market.

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When considering potential director candidates for nomination or election, the following characteristics are considered in accordance with our Nominating and Governance Committee Charter:

In addition, in order to maintain an effective mix of skills and backgrounds among the members of our Board, the following characteristics also may be considered when filling vacancies or identifying candidates:

The Nominating and Governance Committee will consider candidates recommended by stockholders who follow the nomination procedures in our bylaws. The Nominating and Governance Committee does not have a formal policy with respect to diversity; however, as noted above, the Board and the Nominating and Governance Committee believe that it is essential that Board members represent diverse viewpoints.

Number of Meetings

The Board held a total of 17 meetings in 2025. Our Audit Committee held four meetings, our Compensation Committee held one meeting, and our Nominating and Governance Committee held one meeting in 2025. Each director attended at least 75% of the aggregate of the total number of meetings of the Board and the Board committees on which he served.

Board Member Attendance at Annual Stockholder Meetings

Although we do not have a formal policy regarding director attendance at annual stockholder meetings, directors are encouraged to attend these annual meetings absent extenuating circumstances.

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Stockholder Nominations

In accordance with our Bylaws, a stockholder wishing to nominate a director for election at an annual or special meeting of stockholders must timely submit a written proposal of nomination to us at our executive offices. To be timely, a written proposal of nomination for an annual meeting of stockholders must be received at least 90 calendar days but no more than 120 calendar days before the first anniversary of the date on which we held our annual meeting of stockholders in the immediately preceding year; provided, however, that in the event that the date of the annual meeting is advanced or delayed more than 30 calendar days from the anniversary of the annual meeting of stockholders in the immediately preceding year, the written proposal must be received: (i) at least 90 calendar days but no more than 120 calendar days prior to the date of the annual meeting; or (ii) no more than 10 days after the date we first publicly announce the date of the annual meeting. A written proposal of nomination for a special meeting of stockholders must be received no earlier than 120 calendar days prior to the date of the special meeting nor any later than the later of: (i) 90 calendar days prior to the date of the special meeting; and (ii) 10 days after the date we first publicly announce the date of the special meeting.

Each written proposal for a nominee must contain: (i) the name, age, business address and telephone number, and residence address and telephone number of the nominee; (ii) the current principal occupation or employment of each nominee, and the principal occupation or employment of each nominee for the prior ten (10) years; (iii) a complete list of companies, whether publicly traded or privately held, on which the nominee serves (or, during any of the prior ten (10) years, has served) as a member of the board of directors; (iv) the number of shares of our common stock that are owned of record and beneficially by each nominee; (v) a statement whether the nominee, if elected, intends to tender, promptly following such person's failure to receive the required vote for election or reelection at the next meeting at which the nominee would face election or reelection, an irrevocable resignation effective upon acceptance of such resignation by the Board; (vi) a completed and signed questionnaire, representation and agreement relating to voting agreements or commitments to which the nominee is a party; (vii) other information concerning the nominee that would be required in a proxy statement soliciting the nominee's election; and (viii) information about, and representations from, the stockholder making the nomination.

A stockholder interested in submitting a nominee for election to the Board of Directors should refer to our Bylaws for additional requirements. Upon receipt of a written proposal of nomination meeting these requirements, the Nominating and Governance Committee of the Board will evaluate the nominee in accordance with its charter and the characteristics listed above.

Compensation Committee Interlocks and Insider Participation

None of the current members of our compensation committee has ever been an executive officer or employee of ours. None of our executive officers currently serves, or has served during the last completed fiscal year, on the compensation committee or board of directors of any other entity that has one or more executive officers serving as a member of our board of directors or compensation committee.

Director Compensation

Currently, each of our non-executive directors, consisting of Mr. Berezovsky, Mr. Thompson, Mr. Peterson and Mr. Reynolds, receive an annual retainer of $75,000 in cash. The Company can also issue equity awards including restricted stock units and stock options, to our non-executive directors. We do not provide any perquisites to directors.

The following Director Compensation Table summarizes the compensation of each of our non-employee directors for services rendered to us during the year ended December 31, 2025:

2025 Director Compensation Table

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In addition to the fees listed above, we reimburse the directors for travel expenses submitted to us related to their attendance at meetings of the Board or its committees or performing their duties as directors. The directors did not receive any other compensation or personal benefits.

Code of Ethics

We have adopted a code of ethics that applies to our principal executive officer, principal financial officer, principal accounting officer and other senior finance and accounting staff. The code is designed to, among other things, deter wrongdoing and to promote the honest and ethical conduct of our officers and employees. The text of our code of ethics can be found on our Internet website at www.ascentsolar.com. If we effect an amendment to, or waiver from, a provision of our code of ethics, we intend to satisfy our disclosure requirements by posting a description of such amendment or waiver on that Internet website or via a current report on Form 8-K.

Policy on Trading, Pledging and Hedging of Company Stock

Certain transactions in our securities (such as purchases and sales of publicly traded put and call options, and short sales) create a heightened compliance risk or could create the appearance of misalignment between management and stockholders. In addition, securities held in a margin account or pledged as collateral may be sold without consent if the owner fails to meet a margin call or defaults on the loan, thus creating the risk that a sale may occur at a time when an officer or director is aware of material, non-public information or otherwise is not permitted to trade in Company securities. Our insider trading policy expressly prohibits derivative transactions of our stock by our executive officers and directors.

Rule 10b5-1 Sales Plans

Our policy governing transactions in our securities by directors, officers, and employees permits our officers, directors, and certain other persons to enter into trading plans complying with Rule 10b5-1 under the Exchange Act. Generally, under these trading plans, the individual relinquishes control over the transactions once the trading plan is put into place and can only put such plans into place while the individual is not in possession of material non-public information. Accordingly, sales under these plans may occur at any time, including possibly before, simultaneously with, or immediately after significant events involving our company. During 2025, none of our directors or executive officers had a Rule 10b5-1 in effect.

Communication with the Board of Directors

Stockholders may communicate with the Board by sending correspondence to our Chairman, c/o the Corporate Secretary, at our corporate address on the cover of this Form 10-K. It is our practice to forward all such correspondence to our Chairman, who is responsible for determining whether to relay the correspondence to the other members of the Board.

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Item 11. Executive Compensation

We have opted to comply with the executive compensation disclosure rules applicable to "smaller reporting companies," as such term is defined in the rules promulgated under the Securities Act.

This section provides an overview of the compensation awarded to, earned by, or paid to each individual who served as our principal executive officer during 2025, and up to two of our next most highly compensated executive officers in respect of their service to our Company for 2025. Our named executive officers, or the Named Executive Officers, for the year ended December 31, 2025, are:

The following Summary Compensation Table sets forth certain information regarding the compensation of our Named Executive Officers for services rendered in all capacities to us during the years ended December 31, 2025 and 2024.

Summary Compensation Table

In 2024, Mr. Warley was awarded 2,150 restricted stock units ("RSU"), valued at $77 per RSU, which represent their grant date fair value and 23,500 stock options, valued at $4.15 per option, which represent their grant date fair value. One third of the RSUs vested on March 31, 2024 and the remaining unvested RSUs vested pro rata on January 1, 2025 and January 1, 2026. One third of these options vested on September 15, 2024. The remaining unvested options will vest pro rata annually on over the next two years.

In 2024, Ms. Jo was awarded 425 RSUs, valued at $77 per RSU, which represent their grant date fair value and 11,500 stock options, valued at $4.15 per option, which represent their grant date fair value. One third of the RSUs vested on March 31, 2024 and the remaining unvested RSUs vested pro rata on January 1, 2025 and January 1, 2026. One third

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of these options vested on September 15, 2024. The remaining unvested options will vest pro rata annually on over the next two years.

In 2024, Mr. Gulati was awarded 425 RSUs, valued at $77 per RSU, which represent their grant date fair value and 11,500 stock options, valued at $4.15 per option, which represent their grant date fair value. One third of the RSUs vested on March 31, 2024 and the remaining unvested RSUs vested pro rata on January 1, 2025 and January 1, 2026. One third of these options vested on September 15, 2024. The remaining unvested options will vest pro rata annually on over the next two years.

Executive Employment Agreements

Paul Warley

On December 31, 2025, the Company entered into a new CEO employment agreement (the "2025 CEO Agreement") with Mr. Warley, effective January 1, 2026. The 2025 CEO Agreement was entered into to replace the prior 2023 agreement which expired on December 31, 2025. Under the 2025 CEO Agreement, Mr. Warley will receive an annual base salary of $450,000 and will be eligible for a discretionary annual incentive bonus of up to 150% of this base salary if the targets are achieved. Additionally, if the Company terminates Mr. Warley without cause or following a change in control or Mr. Warley terminates employment for good reason, Mr. Warley will be entitled to receive (i) 24 months of base salary, (ii) 12 months of paid health insurance under COBRA, and (iii) full vesting acceleration of any outstanding stock options or other equity incentives. Mr. Warley will also receive a moving allowance of up to $30,000 if he relocates his primary residence to Colorado and the Company will purchase a $1 million life insurance policy that designates his spouse as the beneficiary.

Under these employment agreements, Mr. Warley is required to maintain the confidentiality of the Company's proprietary information. The employment agreements also includes customary non-competition and non-solicitation provisions that Mr. Warley must comply with for a period of 12 months after termination of his employment with the Company.

Jin Jo

On December 31, 2025, the Company entered into a new CFO employment agreement (the "2025 CFO Agreement") with Ms. Jo, effective January 1, 2026. The 2025 CFO Agreement was entered into to replace the prior 2023 agreement which expired on December 31, 2025. Under the 2025 CFO Agreement, Ms. Jo will receive an annual base salary of $255,000 and will be eligible for a discretionary annual incentive bonus of up to 100% of this base salary if the targets are achieved. Additionally, if the Company terminates Ms. Jo without cause or following a change in control or Ms. Jo terminates employment for good reason, Ms. Jo will be entitled to receive (i) 12 months of base salary, (ii) 12 months of paid health insurance under COBRA, and (iii) full vesting acceleration of any outstanding stock options or other equity incentives.

Under these employment agreements, Ms. Jo is required to maintain the confidentiality of the Company's proprietary information. The employment agreements also includes customary non-competition and non-solicitation provisions that Ms. Jo must comply with for a period of 12 months after termination of his employment with the Company.

Bobby Gulati

On December 31, 2025, the Company entered into a new COO employment agreement (the "2025 COO Agreement") with Mr. Gulati, effective January 1, 2026. The 2025 COO Agreement was entered into to replace the prior 2023 agreement which expired on December 31, 2025. Under the 2025 COO Agreement, Mr. Gulati will receive an annual base salary of $255,000 and will be eligible for a discretionary annual incentive bonus of up to 100% of this base salary if the targets are achieved. Additionally, if the Company terminates Mr. Gulati without cause or following a change in control or Mr. Gulati terminates employment for good reason, Mr. Gulati will be entitled to receive (i) 12 months of base salary, (ii) 12 months of paid health insurance under COBRA, and (iii) full vesting acceleration of any outstanding stock options or other equity incentives.

Under these employment agreements, Mr. Gulati is required to maintain the confidentiality of the Company's proprietary information. The employment agreements also includes customary non-competition and non-solicitation provisions that Mr. Gulati must comply with for a period of 12 months after termination of his employment with the Company.

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The following table sets forth information concerning the outstanding equity awards granted to the named executive officer as of December 31, 2025.

Outstanding Equity Awards at Fiscal Year-End 2025

Item 12. Security Ownership of Certain Beneficial Owners and Management and Related Stockholder Matters

Security Ownership of Certain Beneficial Owners and Management

The following table shows information regarding the beneficial ownership of our common stock by our current directors, our Named Executive Officers, and our greater than 5% beneficial owners as of March 20, 2026.

Beneficial ownership is determined in accordance with the rules of the SEC and generally includes any shares over which a person exercises sole or shared voting or investment power and all shares issuable upon exercise of options or the vesting of restricted stock units within 60 days of March 20, 2026 (or May 19, 2026). For purposes of calculating the percentage of our common stock beneficially owned, the number of shares of our common stock includes 9,461,887 shares of our common stock outstanding as of March 20, 2026.

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Unless otherwise indicated, each of the stockholders listed below has sole voting and investment power with respect to the shares beneficially owned.

The address for each director or Named Executive Officer is c/o Ascent Solar Technologies, Inc., 12300 Grant Street, Thornton, Colorado 80241.

* Less than 1.0%

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Securities Authorized for Issuance under Equity Compensation Plans

The following table sets forth information as of December 31, 2025 relating to all of our equity compensation plans:

The Company's 2023 Equity Incentive Plan became effective in November 2023. The 2023 Plan currently has an aggregate of 103,145 shares of common stock authorized for issuance, after giving effect to the "evergreen" increase of 72,745 shares as of January 1, 2025.

The executive equity grant made to Mr. Warley in 2022 were made outside of a stockholder approved plan, in reliance upon the "inducement grant" exception provided for in the Nasdaq listing rules.

Item 13. Certain Relationships and Related Transactions, and Director Independence

Series 1C Preferred Stock Transaction

On October 17, 2024, the Company entered into a securities purchase agreement with accredited investors for a convertible preferred stock financing for approximately $1.9 million of gross proceeds and will issue approximately 1,900 shares of Series 1C convertible preferred stock ("Series 1C Preferred Stock") at a purchase price of $1,000 per share. Approximately 75% of these securities were purchased by officers, directors and advisory board members of the Company. See Item 12. Security Ownership of Certain Beneficial Owners and Management and Related Stockholder Matters. The Company received approximately $815,000 of gross proceeds and remaining subscription receivable was subsequently cancelled. The Series 1C Preferred Stock is convertible into common stock at any time after April 17, 2025 at the option of the holder at an initial fixed conversion price of $2.50 per share of common stock; however, the holder may not convert any portion to the extent that the holder would beneficially own more than 4.99% of the Company's outstanding shares of Common Stock outstanding immediately after giving effect to the conversion.

Holders of the Series 1C Preferred Stock will be entitled to dividends on the per share stated value of $1,000 in the amount of 10% per annum, payable quarterly. The dividend rate will increase to 15% if any of the Series 1C Preferred Stock remains outstanding on or after October 17, 2027. Unless the Company elects to pay dividends on the Series 1C Preferred Stock in cash, the Company will cumulate the dividends, in which case the accrued dividend amount shall be added to the stated value of each share of Series 1C Preferred Stock.

If at any time the closing sale price of the Company's common stock equals at least 300% of the conversion price for the most recent 20 consecutive trading days, the Company shall have the right to redeem all, but not less than all, of the Series 1C Preferred Stock then outstanding in cash at a price equal to 110% of the stated value of the shares being redeemed.

Upon our liquidation, dissolution or winding up, holders of Series 1C Preferred Stock shall be entitled to receive in cash out of the assets of the Company, before any amount shall be paid to the holders of any of shares of common stock, an amount per share of Series 1C Preferred Stock equal to the greater of (A) 110% of the stated value of such preferred share and (B) the amount per share such holder would receive if such holder converted such preferred share into common stock immediately prior to the date of such payment.

On any matter presented to the stockholders of the Company for their action or consideration at any meeting of stockholders of the Company (or by written consent of stockholders in lieu of meeting), each holder of outstanding shares of Series 1C Preferred Stock shall be entitled to cast the number of votes equal to the number of whole shares of common stock into which the outstanding shares of Series 1C Preferred Stock held by such holder are convertible as of the record date (but only after

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giving effect to the maximum percentage conversion limitations referred to above). Except as provided by law or by the other provisions of the Series 1C Preferred Stock, holders of Series 1C Preferred Stock shall vote together with the holders of common stock as a single class and on an as-converted to common stock basis.

Policies and Procedures with Respect to Transactions with Related Persons

The Board recognizes that related person transactions can present a heightened risk of potential or actual conflicts of interest. Accordingly, our Audit Committee charter requires that all such transactions will be reviewed and subject to approval by members of our Audit Committee, which will have access, at our expense, to our or independent legal counsel. Future transactions with our officers, directors or greater than five percent stockholders will be on terms no less favorable to us than could be obtained from independent third parties.

Director Independence

Our Board of Directors has determined that four out of our five directors are independent directors, as defined under the applicable rules of the Nasdaq Capital Market listing standards. The independent directors are Messrs. Berezovsky, Thompson, Peterson, and Reynolds.

Item 14. Principal Accounting Fees and Services

PRINCIPAL ACCOUNTANTS

Fees for audit and related services by our accounting firm, Haynie & Company, for the years ended December 31, 2025 and 2024 were as follows:

Audit fees for Haynie & Company for fiscal year 2025 and 2024 represents aggregate fees for the 2025 and 2024 annual audit and quarterly reviews of the financial statements. Audit-related services consisted primarily of work performed in connection with our registration statements.

Audit Committee Pre-Approval Policies and Procedures

The Audit Committee charter provides that the Audit Committee will pre-approve all audit services and non-audit services to be provided by our independent auditors before the accountant is engaged to render these services. The Audit Committee may consult with management in the decision making process, but may not delegate this authority to management. The Audit Committee may delegate its authority to pre-approve services to one or more committee members, provided that the designees present the pre-approvals to the full committee at the next committee meeting. All audit and non-audit services performed by our independent accountants have been pre-approved by our Audit Committee to assure that such services do not impair the auditors' independence from us.

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PARTIV

Item 15. Exhibits and Financial Statement Schedules

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INDEX TO EXHIBITS

Set forth below is a list of exhibits that are being filed or incorporated by reference into this Annual Report on Form 10-K:

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37

Item 16. Form10-K Summary

None.

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ASCENT SOLAR TECHNOLOGIES, INC.

SIGNATURES

Pursuant to the requirements of Section 13 or 15(d) of the Securities Exchange Act of 1934, the registrant has duly caused this report to be signed on its behalf by the undersigned, thereunto duly authorized on the 20th day of March, 2026.

Pursuant to the requirements of the Securities Exchange Act of 1934, this report has been signed below by the following persons on behalf of the registrant in the capacities and on the dates indicated.

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Ascent Solar Technologies, Inc.

Index to Financial Statements

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REPORT OF INDEPENDENT REGISTERED PUBLIC ACCOUNTING FIRM

To the Board of Directors and
Stockholders of Ascent Solar Technologies, Inc.

Substantial Doubt about the Company's Ability to Continue as a Going Concern

The accompanying financial statements have been prepared assuming that the Company will continue as a going concern. As discussed in Note 3 to the financial statements, the Company has had limited production which has led to the Company being dependent on outside financing to fund its operations. There is no assurance that the Company will be able to raise additional capital and cash on hand is not sufficient to sustain operations. These factors raise substantial doubt about its ability to continue as a going concern. Management's plans in regard to these matters are also described in Note 3. The financial statements do not include any adjustments that might result from the outcome of this uncertainty.

Basis for Opinion

These financial statements are the responsibility of the Company's management. Our responsibility is to express an opinion on the Company's financial statements based on our audits. We are a public accounting firm registered with the Public Company Accounting Oversight Board (United States) (PCAOB) and are required to be independent with respect to the Company in accordance with the U.S. federal securities laws and the applicable rules and regulations of the Securities and Exchange Commission and the PCAOB.

We conducted our audits in accordance with the standards of the PCAOB. Those standards require that we plan and perform the audit to obtain reasonable assurance about whether the financial statements are free of material misstatement, whether due to error or fraud. The Company is not required to have, nor were we engaged to perform, an audit of its internal control over financial reporting. As part of our audits, we are required to obtain an understanding of internal control over financial reporting, but not for the purpose of expressing an opinion on the effectiveness of the Company's internal control over financial reporting. Accordingly, we express no such opinion.

Our audits included performing procedures to assess the risks of material misstatement of the financial statements, whether due to error or fraud, and performing procedures that respond to those risks. Such procedures included examining, on a test basis, evidence regarding the amounts and disclosures in the financial statements. Our audits also included evaluating the accounting principles used and significant estimates made by management, as well as evaluating the overall presentation of the financial statements. We believe that our audits provide a reasonable basis for our opinion.

Critical Audit Matters

The critical audit matters communicated below are matters arising from the current period audit of the financial statements that were communicated or required to be communicated to the audit committee and that: (1) relate to accounts or disclosures that are material to the financial statements and (2) involved our especially challenging, subjective, or complex judgments. We determined that there were no critical audit matters.

/s/ Haynie

Haynie

Salt Lake City, Utah

March 20, 2026

We have served as the Company's auditor since 2017.

F-1

ASCENT SOLAR TECHNOLOGIES, INC.

BALANCE SHEETS

The accompanying notes are an integral part of these financial statements.

F-2

ASCENT SOLAR TECHNOLOGIES, INC.

STATEMENTS OF OPERATIONS AND COMPREHENSIVE INCOME

The accompanying notes are an integral part of these financial statements.

F-3

ASCENT SOLAR TECHNOLOGIES, INC.

STATEMENT OF STOCKHOLDERS' EQUITY

For the year ended December 31, 2025