# Biolargo, Inc.: Form 10-K for the period ended Dec 31, 2025 - Company: [Biolargo, Inc.](/companies/blgo.md) (CIK 880242) - Form: 10-K - Filed: 2026-03-04 - Accepted by EDGAR: Mar 4, 2026, 17:11 ET - Period: 2025-12-31 - Accession: 0001437749-26-006926 - Inline XBRL: yes - Main document: https://www.sec.gov/Archives/edgar/data/880242/000143774926006926/blgo20251231_10k.htm - All documents and exhibits: https://www.sec.gov/Archives/edgar/data/880242/000143774926006926/ ## Figures reported in this filing Standardized XBRL line items for the period ended 2025-12-31. | Line item | Period | Value | XBRL concept | | --- | --- | ---: | --- | | Revenue | 12 months, 2025-01-01 to 2025-12-31 | $7.8m | us-gaap:RevenueFromContractWithCustomerIncludingAssessedTax | | Cost of revenue | 12 months, 2025-01-01 to 2025-12-31 | $4.4m | us-gaap:CostOfGoodsAndServicesSold | | Gross profit | 12 months, 2025-01-01 to 2025-12-31 | $3.4m | us-gaap:GrossProfit | | Research and development | 12 months, 2025-01-01 to 2025-12-31 | $2.6m | us-gaap:ResearchAndDevelopmentExpense | | Selling, general and administrative | 12 months, 2025-01-01 to 2025-12-31 | $11.8m | us-gaap:SellingGeneralAndAdministrativeExpense | | Operating income | 12 months, 2025-01-01 to 2025-12-31 | −$14.9m | us-gaap:OperatingIncomeLoss | | Interest expense | 12 months, 2025-01-01 to 2025-12-31 | $540.0k | us-gaap:InterestExpenseNonoperating | | Net income | 12 months, 2025-01-01 to 2025-12-31 | −$15.2m | us-gaap:ProfitLoss | | Basic EPS | 12 months, 2025-01-01 to 2025-12-31 | −$0.04 | us-gaap:EarningsPerShareBasic | | Operating cash flow | 12 months, 2025-01-01 to 2025-12-31 | −$8.3m | us-gaap:NetCashProvidedByUsedInOperatingActivities | | Cash and equivalents | at 2025-12-31 | $3.9m | us-gaap:CashAndCashEquivalentsAtCarryingValue | | Current assets | at 2025-12-31 | $5.1m | us-gaap:AssetsCurrent | | Total assets | at 2025-12-31 | $8.3m | us-gaap:Assets | | Current liabilities | at 2025-12-31 | $5.1m | us-gaap:LiabilitiesCurrent | | Total liabilities | at 2025-12-31 | $6.8m | us-gaap:Liabilities | | Long-term debt | at 2025-12-31 | $2.1m | us-gaap:LongTermDebt | | Shareholders' equity | at 2025-12-31 | $4.0m | us-gaap:StockholdersEquity | ## Business As filed, 36,181 characters. ### USE OF FORWARD-LOOKING STATEMENTS IN THIS REPORT This annual report on Form 10-K for the year ended December 31, 2025 (the “Annual Report”) contains forward-looking statements that involve substantial risks and uncertainties. All statements, other than statements of historical fact, included in this Annual Report regarding our strategy, future operations, future financial position, future revenues, projected costs, prospects and plans and objectives of management are forward-looking statements. These forward-looking statements include, but are not limited to, predictions regarding: - our business plan; - the commercial viability of our technology and products incorporating our technology; - the effects of competitive factors on our technology and products incorporating our technology; - expenses we will incur in operating our business; - our liquidity and sufficiency of existing cash; - the success of our financing plans; and - the outcome of pending or threatened litigation. You can identify these and other forward-looking statements by the use of words such as “anticipates,” “believes,” “estimates,” “expects,” “intends,” “may,” “plans,” “projects,” “will,” “would” and similar expressions, or the negative of such terms, although not all forward-looking statements contain these identifying words. Forward-looking statements also include the assumptions underlying or relating to any of the foregoing statements. We have based these forward-looking statements on our current expectations and projections about future events. Although we believe that the expectations underlying our forward-looking statements are reasonable, these expectations may prove to be incorrect, and all of these statements are subject to risks and uncertainties. Therefore, you should not place undue reliance on our forward-looking statements. We have included important risks and uncertainties in the cautionary statements included in this Annual Report; particularly, the section titled “Risk Factors” incorporated by reference herein. We believe these risks and uncertainties could cause actual results or events to differ materially from the forward-looking statements that we make. Should one or more of these risks and uncertainties materialize, or should underlying assumptions, projections or expectations prove incorrect, actual results, performance or financial condition may vary materially and adversely from those anticipated, estimated or expected. Our forward-looking statements do not reflect the potential impact of future acquisitions, mergers, dispositions, joint ventures or investments that we may make. We do not assume any obligation to update any of the forward-looking statements contained herein, whether as a result of new information, future events or otherwise, except as required by law. In the light of these risks and uncertainties, the forward-looking events and circumstances discussed in this report may not occur, and actual results could differ materially from those anticipated or implied in the forward-looking statements. Any forward-looking statement made by us in this report is based only on information currently available to us and speaks only as of the date on which it is made. When we refer in this report to “BioLargo,” the “Company,” “our Company,” “we,” “us” and “our,” we mean BioLargo, Inc., and our subsidiaries, including BioLargo Life Technologies, Inc., which holds our intellectual property; ONM Environmental, Inc., which manufactures, markets, sells and distributes our odor and volatile organic compound ("VOC") control products; BioLargo Energy Technologies, Inc. (“BETI”), formed to commercialize our proprietary battery technology; BioLargo Canada, Inc., our primary research and development team operating in Edmonton, Alberta Canada; BioLargo Engineering, Science & Technologies, LLC (“BLEST”), a professional engineering services division in Oak Ridge Tennessee; BioLargo Equipment Solutions & Technologies, Inc., which sells our water treatment products; BioLargo Development Corp., which employs and provides benefits to our employees; and Clyra Medical Technologies, Inc. (“Clyra Medical”), which commercializes our technologies in the medical and dental fields. All subsidiaries are wholly owned, except for BETI, BLEST and Clyra Medical. ### Our Company BioLargo, Inc. is a corporation organized under the laws of the state of Delaware. Our common stock is quoted on the OTC Markets highest level marketplace, the OTCQX, under the trading symbol “BLGO”. Our corporate offices are located at 14921 Chestnut St., Westminster, California 92683. We have a research facility and offices at the University of Alberta in Canada, and our engineering team is located at 105 Fordham Road in Oak Ridge, Tennessee. Our medical products company is located at 10770 N. 46th Street, Unit C-300, in Tampa, Florida. Our telephone number is (888) 400-2863. We operate through multiple wholly- and partially-owned subsidiaries. Our principal corporate website is www.BioLargo.com. We also maintain a blog at www.BioLargo.com/blog and other websites including www.ONMEnvironmental.com, www.CupriDyne.com, www.ClyraMedical.com, www.BioLargoEnergy.com, www.BioLargoEquipment.com, www.BioLargoEngineering.com, www.bestPFAStreatment.com, and www.BioLargoWater.com. The information on our websites and blog are not, and shall not be deemed to be, a part of this Annual Report on Form 10-K. ### Our Business - Innovator and Solution Provider BioLargo is in the business of creating new cleantech technologies to solve tough, globally relevant problems. We invent, develop, then commercialize technologies that tackle difficult challenges in air quality, water, environmental engineering, battery energy storage, and advanced antimicrobial medical device platforms. Our model is to invent new technologies that solve specific problems, develop them and prove they work, and then commercialize them with purpose-suited subsidiaries, identify and secure the right partnerships to increase their commercial reach, or potentially sell the intellectual property. Why do we do this work? Every member of our team – including PhD scientists, engineers, and entrepreneurs – has a passion for seeking new, never-before-seen innovations that can make life better around the world. We care about safeguarding the environment and human health for future generations. We care about making technologies that are affordable and flexible enough to be accessed around the world. And we care about being the best at what we do – creating best-in-class technologies to solve meaningful cleantech challenges. Some of our areas of focus include environmental problems like PFAS contamination, water pollution by pharmaceuticals and micropollutants, air pollution by VOCs, hard-to-treat odors from landfills and sewage plants, infection and wound healing and the creation of energy storage systems that are more affordable, efficient, safer and environmentally friendly. Below you’ll read about the cleantech ventures and projects we are focused on commercialization today. Behind those, however, is a pipeline of other cleantech innovations in various stages of development associated with our expansive array of issued and pending patents, and that have been funded in part by over 90 government grants. We operate our business in distinct business segments: - Odor and VOC control products, including consumer pet and household products and CupriDyne Clean Industrial Odor Eliminator, sold by our wholly-owned subsidiary ONM Environmental, Inc.; - Water treatment equipment and solutions, including our PFAS remediation system the Aqueous Electrostatic Concentrator (AEC), our water reuse and recycling technology co-developed with Garratt-Callahan called AROS, and sold by our wholly-owned subsidiary BioLargo Equipment Solutions & Technologies, Inc.; - Battery energy storage systems designed for grid-scale energy storage and other industrial uses under the brand name CellinityTM being developed by our partially owned (95%) subsidiary BioLargo Energy Technologies, Inc.; - Medical products based on our technologies sold by our partially owned (48%) subsidiary Clyra Medical Technologies, Inc.; - Our professional engineering services division, which, in addition to serving outside clients on a fee for service basis, supports our internal business units, through our partially owned (70%) subsidiary BioLargo Engineering, Science & Technologies, LLC ("BLEST"); - Our research and support personnel, through our wholly-owned subsidiary BioLargo Canada, Inc., located on campus at the University of Alberta, Edmonton, Canada. ### Odor Control (Consumer and Industrial) ONM Environmental, Inc. ("ONM") is BioLargo’s wholly-owned subsidiary that delivers robust and comprehensive products and services to control and mitigate odor and VOCs for both consumer and industrial applications. Its flagship product – CupriDyne® Clean – is applied to odor-emitting masses such as landfills and composting facilities by misting systems, sprayers, water trucks and similar water delivery systems designed, manufactured and installed by ONM. It is also sold to third parties under private label brands. ### Consumer Private-Label Products We sell odor-control products based on our technologies to third parties who market and sell the products under their own brand names. The most successful thus far has been pet odor control products sold under the brand name "Pooph" by Pooph Inc. In addition to purchasing product from us at an agreed-upon manufacturing margin, Pooph Inc. agreed to pay us a six percent royalty on their sales in exchange for exclusive rights to our technology for pet odors, and agreed that if they sold their brand to a third party, we would receive 20% of the exit value. Pooph defaulted on their payments, we revoked their license to sell pet products with our technology, and sued Pooph for patent infringement and other claims in order to protect our intellectual property. (See subheading "Impairment/Credit Loss Expense, Pooph Litigation" in Results of Operations, below.) We are focused on redeploying its technology with new partners that share our commitment to quality, transparency, and integrity, and expand the reach of our proven odor-control technology into new markets, providing consumers with safe, effective, and environmentally friendly products. We do not expect the Pooph litigation to materially affect our other business units or growth strategy. The success of the pet-odor consumer products is an example of our goal to develop distribution channels that do not rely on our in-house sales and distribution infrastructure. While Pooph is by far the company’s most successful private label product thus far, we sell other private label odor-control products and continue to pursue related business opportunities as a means of tapping into new markets. ### Industrial Odor and VOC Solutions We believe CupriDyne® Clean is the number-one performing industrial odor-control product in the market, and that it offers substantial savings to our customers compared with competing products. We have been and expect to continue selling product to municipalities and some of the largest solid waste handling companies in the country to help control odors emitted from waste handling and sanitation sites and landfills. In addition to selling products, ONM Environmental offers a menu of services to landfills, transfer stations, wastewater treatment facilities as well as facilities in non-waste related industries. These services include engineering design, construction, installation, ongoing maintenance and on-site support services to assist our clients in the implementation and continued use of the various systems that deliver our liquid products in the field (such as misting systems). A significant portion of industrial odor control product and service revenue comes from ongoing contracts with cities and counties in Southern California, where ONM has installed comprehensive odor control systems to mitigate nuisance odors emitted from municipal waste handling and sanitation sites. #### BioLargo Equipment Solutions & Technologies – Innovative Water Treatment Solutions Over the years, we have developed multiple innovative technologies and equipment platforms that focus on challenging issues in the water treatment industry, including the AEC (developed to remove per- and polyfluoroalkyl substances, aka "PFAS"), and the AROS water reuse technology (for industrial cooling tower water recycling such as in data centers, co-developed with Garratt-Callahan). We sell these products through our wholly-owned subsidiary BioLargo Equipment Solutions & Technologies, Inc. (“BEST”), which manages the sales and distribution of our water treatment products and related services. BLEST's board of directors includes Jeffrey Kightlinger, former CEO of the Metropolitan Water District of Southern California, Sally Gutierrez, retired career senior executive from the US Environmental Protection Agency (EPA), and Larry Dick, former Vice Chairman of the Metropolitan Water District of Southern California and board member of the Municipal Water District of Orange County. Each brings their significant and distinctive experience from decades in the water industry to BEST’s board to help the company create the necessary regulatory and industry connections that will be critical for its efforts to secure larger and more high-profile projects for its PFAS treatment and other water treatment technologies. These board members have been instrumental in efforts to raise awareness of our innovative treatment solutions within the water industry and EPA. Securing sales in the water and wastewater industry is a very technically intensive process and can be long and arduous. The entirety of the sales cycle can be lengthy, in some cases even taking many months or, in the case of very large projects, multiple years. A typical sales timeline for a municipal drinking water or wastewater customer, from introduction to signing the contract for a full-scale install, usually requires feasibility studies, on-site pilot projects, budget approvals, State regulatory approvals, and more. Industrial clients may have a shorter sales cycles but are under pressure to ensure that the Return on Investment (ROI) fits into company standards, so their reviews can also be lengthy. For any water treatment project, the process is also very engineering-intensive, and therefore the staff required to secure contracts for water treatment projects need to be highly technical engineers. In our company, BLEST’s engineers fill this role. ***AEC, a solution for the PFAS “forever-chemicals” crisis*** One of the most significant and timely innovations in our portfolio is our per- and polyfluoroalkyl substance (PFAS) water remediation system the Aqueous Electrostatic Concentrator (AEC), a novel water treatment system that removes PFAS from water while generating only a fraction of the PFAS-laden waste of the most common currently used solutions (carbon filtration, ion exchange, and reverse osmosis), and oftentimes at a lower cost. PFAS are a group of man-made chemicals used for decades in the manufacture of both household and industrial goods, which have been detected in drinking water around the world. PFAS are a concern because they do not break down in the environment, can move through soil and contaminate drinking water sources, and build up (bioaccumulate) in fish, wildlife and humans. PFAS chemicals have been linked to cancer, immune disorders, liver dysfunction, and many other human health problems. Detection of unsafe levels of PFAS around the world has given rise to a number of market opportunities for treatment and remediation technologies, including in drinking water, industrial wastewater, municipal wastewater, solid waste, landfill leachate, organic foods and more. We have successfully validated the AEC as an effective system to selectively extract and collect PFAS chemicals from contaminated water, including performance testing that shows “non-detect” levels of removal, which meet and exceed EPA standards. We have demonstrated more than 10,000 hours of continuous operation showing no materially significant degradation of the AEC system’s components or performance over time and believe the costs to operate our system will be far less than that of the two primary incumbent technologies. As a modular system, we believe the AEC is scalable to small commercial units used in smaller remediation projects for groundwater, wastewater, or landfill leachate, as well as large commercial installations of drinking water treatment facilities, and we believe that our engineering team has the experience to deliver systems to meet the needs of any sized commercial installation. In order to provide a full turn-key solution for our customers, we have developed an expanded offering whereby we can bundle a service package with each customer project that includes a membrane exchange program, the collection of PFAS, and transport and destruction of the PFAS using a novel “electrooxidation” process which our studies have shown is capable of reaching non-detect levels of PFAS after treating AEC-concentrated PFAS containing water, wastewater, or even landfill leachate (the contaminant-laden water that drains from landfills). Our AEC unit has been installed and is up and running in Lake Stockholm, New Jersey, removing PFAS from drinking water for local residents. The AEC's performance is undergoing regular testing by both the U.S. EPA and the New Jersey Department of Environmental Protection. This project may represent a key milestone for the commercialization of the AEC, as we believe industry validation of the technology in a first municipal drinking water treatment project will play an important role in showcasing the AEC’s distinct advantages over incumbent technologies like carbon filtration and ion exchange. As we progress through the commercial rollout of our AEC technology, we continue to invest in innovation aimed at enhancing its commercial viability. These efforts are focused on improving system performance, reducing lifecycle costs, and strengthening the AEC’s competitive economic position within the PFAS treatment market. We remain committed to delivering scalable, cost-effective solutions that align with evolving regulatory requirements and market demand. We believe we are well-positioned in the PFAS-removal market for multiple reasons. We have successfully completed over a dozen pilot studies with prospective customers’ PFAS contaminated water from a variety of source waters including groundwater, wastewater and leachate; we have successfully maintained operation of our AEC PFAS treatment system for over 10,000 hours continuously, thus demonstrating its resilience to long-term use; we have submitted bids and proposals and have received indications of interest from a wide range of customer types; we have added several high-profile experts from the industry to our team who are assisting in opening doors to potential clients and collaborators; we have entered into discussions about partnership and opportunities for collaboration with industry-leading firms who have a gap in their PFAS treatment technology portfolio. While these opportunities do not convert into commercial sales overnight, but they represent strong avenues for accelerating adoption of our PFAS treatment solution. ### AROS Minimal Liquid Discharge Water Treatment In partnership with Garratt-Callahan, one of the country’s oldest and largest privately held water treatment companies, our engineers helped develop a “minimal liquid discharge” wastewater treatment system called the Aqueous Reuse Optimization System (AROS) that is designed to minimize industrial wastewater discharges and create water for reuse in other areas of an industrial plant. The system is particularly well-suited for cooling towers at data centers and other high-water-use facilities. Garratt-Callahan, who invented and patented the technology, is actively marketing the AROS system to its existing customer base and to new prospective customers. BLEST will serve as the manufacturing partner and Garratt-Callahan will serve as the selling distributor to leverage their national sales force and over one hundred years of providing services and products to customers. ### Advanced Oxidation System (AOS) The Advanced Oxidation water treatment system (AOS) is our patented water treatment device that generates highly oxidative and energetic species of iodine and other molecules which allow it to eliminate pathogenic organisms and organic contaminants rapidly and effectively as water passes through the device. The key value proposition of the AOS is its ability to reduce or eliminate a wide variety of waterborne contaminants with high performance, including the normally hard-to-treat class of recalcitrant water contaminants called “micropollutants”, while using very little electricity and input chemicals. The AOS has been proven capable of removing hard-to-treat organic micropollutants such as pharmaceuticals from water more quickly and energy-efficiently than other technologies. While the AOS has demonstrated exceptional performance in both laboratory and pilot-scale testing, current U.S. regulatory frameworks have not yet matured to support broad adoption of advanced oxidation technologies for micropollutant removal. Additionally, the domestic market remains dominated by low-cost chemical disinfection solutions. In light of these market conditions, we have elected to pause daily development activities on the AOS in the near term. However, we continue to monitor evolving regulatory trends in the U.S. and are exploring the possibility of international commercialization opportunities, particularly in Europe where regulatory mandates for micropollutant removal are more advanced. Our business development efforts remain focused on strategic partnerships in the European market and on domestic industrial and pharmaceutical wastewater applications where micropollutants are a significant driver of surcharge fee. ### BioLargo Energy Technologies, Inc. Our subsidiary BioLargo Energy Technologies, Inc. (“BETI”) was founded to commercialize a novel battery technology with the potential to help facilitate the ongoing shift toward renewable energy production by providing a safer, longer lasting, more eco-friendly, and more affordable alternative to lithium-ion batteries. Designed for long duration energy storage, also known as "battery energy storage solutions" (BESS), our battery, called Cellinity™, uses a novel “liquid sodium” chemistry that uses common domestically sourced materials, and which has significant advantages over other battery chemistries for use in stationary, long-duration energy storage. BETI operates out of a pilot-scale battery production facility in our Oak Ridge Tennessee engineering headquarters, and is currently manufacturing and testing prototype battery cells. A third party has confirmed many of the technology's exceptional performance claims that we believe will make it an attractive battery technology for long duration energy storage and other industrial uses such as artificial intelligence data centers, electric vehicle charging stations, and renewal energy, including the stability of the chemistry of the battery cell and the reliability of the component construction as a sealed, non-venting cell design with no self-discharging, and the battery's ability to quickly charge and discharge at a high voltage. It has also been proven that the battery can withstand catastrophic physical insults without causing fire or explosion, one of the battery’s key features. With this data confirmed by a third party, our engineers have begun work advancing Cellinity's development, including the design of a larger sized battery cell that would then be incorporated into battery packs, modules and batteries meant for industrial facilities. Simultaneously, our engineers are working to develop manufacturing processes that would allow scale production and a supply chain necessary to ensure costs of goods in line with market demand and conditions. We believe our Cellinity batteries will have features that far surpass comparable lithium-ion batteries, the dominant incumbent technology in the market, including: - Increased safety, no runaway fire risks, and a more sustainable design – with no rare-earth elements – that is capable of being manufactured completely from a domestic supply chain; - Ability to charge and discharge completely, with no degradation of performance, ensuring virtually unlimited charge/discharge cycles, and without self-discharge and no out-gassing; and - Increased energy efficiency and energy density in comparison to lithium-ion batteries, and a longer useful life expectancy of at least 10 years and expected to be up to 20 years. We are exploring multiple opportunities to commercialize our Cellinity batteries through joint ventures with third parties. The third parties would finance the construction of independent battery manufacturing facilities designed and built under the direction of our engineers, and the joint venture would market, manufacture and distribute batteries. BioLargo would (i) receive a minority equity position in each joint venture, (ii) separately manufacture and sell at a profit to the joint venture certain proprietary battery components, and (iii) receive a royalty on the revenues of the joint venture. Given the global growing demand for better batteries, and, while we are witnessing a number of current examples in which battery manufacturers have secured forward-contracts to supply batteries to its customers with backlogs of orders that amount to multiple years of production capacity, we believe our offer to partner with customers to secure needed inventory provides for a clear potential pathway to access capital, and more readily scale up production to meet demand around the world. At this point, we do not intend to finance and build our own manufacturing facilities, nor would we develop in-house sales channels, although that possibility remains an option to explore if needed ### Clyra Medical Technologies, Inc. Our partially owned subsidiary Clyra Medical Technologies, Inc. is a healthcare company that is developing and commercializing products based on our technologies designed to safely treat wound and skin infections and promote wound healing, while reducing the need for antibiotics. Clyra's first products are based on its patented Clyrasept™ technology, which utilizes a Copper-Iodine Complex Solution (CICS) and received premarket clearance from the FDA under Section 510(k). Its first product is ViaCLYR™, a pH-balanced wound management solution formulated from copper sulfate and potassium iodide in a balanced sodium chloride solution, indicated for wound management, cleansing, irrigation, moisturization, and debridement of acute and chronic wounds and burns, sold through wholesale distributors and sales agents. Clyra received a first purchase order for the ViaCLYR™ product from a distributor in February 2026. Clyra is working closely with Keystone Industries, a medical device and cosmetics manufacturer founded over 50 years ago, to ready at-scale manufacturing of its second wound irrigation solution product. Keystone has invested over $3 million in equipment and infrastructure in its manufacturing facilities, and Clyra has invested over $2 million in molds, equipment and resources. Clyra’s management team includes Chief Medical Officer Dr. Steven J. Kavros, a twenty-year veteran of the Mayo Clinic in roles such as Director at the Rochester Mayo Clinic’s Gonda Vascular Wound Healing Center, Nick Valeriani, who had a 34-year career with Johnson and Johnson where he held numerous leadership positions in engineering, manufacturing, sales and marketing, and Linda Park of Edwards Lifesciences, where she serves as Corporate Secretary, Senior Vice President and Associate General Counsel, and as a board member of the Edwards Lifesciences Foundation. ### Full Service Environmental Engineering BioLargo Engineering, Science & Technologies, LLC (“BLEST”) offers full service environmental engineering to third parties and provides engineering support services to our internal teams to accelerate the commercialization of our technologies. BLEST focuses its efforts in these three areas: - providing engineering services to third-party clients as well as affiliated BioLargo entities; - supporting internal product development; and - advancing their own technical innovations such as the AEC PFAS treatment technology. BLEST operates out of our engineering facility in Oak Ridge, Tennessee (a suburb of Knoxville), and employs a group of scientists and engineers, many of whom are owners of the entity (BioLargo owns 70% as of December 31, 2025). The team is led by Randall Moore, who served as Manager of Operations for Consulting and Engineering for the Knoxville office of CB&I Environmental & Infrastructure and was formerly a leader at The Shaw Group, Inc., a Fortune 500 global engineering firm. Many of the other team members are also former employees of CB&I and Shaw, with the exception of more recent staff hires. The team is highly experienced across multiple industries and we believe are considered experts in their respective fields, including: chemical engineering, wastewater treatment (including design, operations, data gathering and data evaluation), process safety, energy efficiency, air pollution, design and control, technology evaluation, technology integration, air quality management & testing, engineering management, permitting, industrial hygiene, applied research and development, air testing, environmental permitting, HAZOP review, chemical processing, thermal design, computational fluid dynamics, mechanical engineering, mechanical design, NEPDES permitting, RCRA/TSCA compliance and permitting, project management, storm water design & permitting, computer assisted design (CAD), bench chemistry, continuous emission monitoring system operator, data handling and evaluation and decommissioning and decontamination of radiological and chemical contaminated facilities. The team has decades of high-level experience in the energy industry. The engineering team has also developed an extended network of trusted engineering subcontractors that assist in serving specific client projects as needed. BLEST engineers generate revenue through services to third party clients, as well as for internal BioLargo projects such as the AEC and battery (revenues from internal projects are eliminated in the consolidation of our financial statements and are designed “intersegment revenue”). Third party contracts include ongoing work at U.S. Air Force bases for air quality control which generate ongoing contract-based revenue of approximately $100,000 per month. Efforts to expand this work as well as with other clients are consistently ongoing. The staff time devoted to supporting the AEC (PFAS) and battery related work is demanding, and, BLEST needs to hire more qualified staff to meet and expanding demand for our growing list of customers and/or expected customers. When we combine the demands of current revenue generating projects and expected growth, we are presented with an obvious challenge to manage quality, timely performance as well as access to qualified staff. We are working carefully to find balance to help ensure we meet the demands of both in a practical customer centric and capital conserving way. It may be for example, when we secure larger and larger contracts for PFAS or Garrett Callan related work, we will need to depend heavily on our contact manufactures to meet the customer demands in the near term as we scale up our infrastructure and work force capabilities. ### Share Purchase Agreement with Lincoln Park On December 13, 2022 we entered into a purchase agreement (the “Purchase Agreement”) with Lincoln Park Capital Fund, LLC (“Lincoln Park”) pursuant to which Lincoln Park committed to purchase up to $10 million of our common stock. The Purchase Agreement expired February 1, 2026. In the aggregate, we sold 17,368,716 shares of Common Stock to Lincoln Park for $3,216,147. During the year ended December 31, 2025, we sold 11,745,123 shares of common stock to Lincoln Park and received $2,122,000 in gross proceeds. During the year ended December 31, 2024, we sold 766,175 shares of common stock to Lincoln Park and received $260,000 in gross proceeds. Our Consolidated Statement of Stockholder Equity at December 31, 2025, includes a $250,000 fee due pursuant to the Purchase Agreement. This amount has been partially paid and as of March 2, 2026, $97,000 is outstanding. We do not intend to enter into a new purchase agreement with Lincoln Park at this time. ### Intellectual Property We have 34 patents issued, including 26 in the United States, and multiple applications pending, and our patents have an average remaining duration of seven years. We believe these patents provide a foundation from which to continue building our patent portfolio, and we believe that our technology is sufficiently useful and novel that we have a reasonable basis upon which to rely on our patent protections. We also rely on trade secrets and technical know-how to establish and maintain additional protection of our intellectual property. As our capital resources permit, we expect to expand our patent protection as we continue to refine our inventions as well as make new discoveries. We regard our intellectual property as critical to our ultimate success. Our goal is to obtain, maintain and enforce patent protection for our products and technologies in geographic areas of commercial interest and to protect our trade secrets and proprietary information through laws and contractual arrangements. We incurred $2,593,000 and $2,882,000 in expense related to our research and development activities in the years ended December 31, 2025 and 2024. ### Competition Our operational subsidiaries operate in diverse markets and each competes against large, well established companies. For industrial odor control, we compete against national companies such as Weaver Consulting Group, Atmos Technologies, Chemstation and OMI Industries. Our Cellinity battery energy storage systems will compete against lithium-ion batteries made by Tesla, Chinese companies CATL (Contemporary Amperex Technology Co.), BYD (Build Your Dreams) and MANLY, and other global leaders such as Panasonic and LG. Our AEC system competes against granular activated carbon, ion-exchange and reverse osmosis systems made by companies such as Veolia, AECOM, Xylem and Pentair. We believe we our products each offer advantages not available to competing products. ### Executive Officers As of December 31, 2025, and as the date of this report, our executive officers were: - Dennis P. Calvert: Chief Executive Officer, President and Chairman of the Board - Charles K. Dargan II: Chief Financial Officer - Joseph L. Provenzano: Corporate Secretary and Sr. Vice President of Operations Our operational subsidiaries are led by: | Subsidiary | President | | --- | --- | | ONM Environmental, Inc. | Joseph L. Provenzano | | BioLargo Engineering, Science & Technologies, LLC ("BLEST") | Randall Moore | | BioLargo Canada, Inc. | Richard Smith | | Clyra Medical Technologies, Inc. | Steven V. Harrison | | BioLargo Energy Technologies, Inc. ("BETI") | Dennis P. Calvert | | BioLargo Equipment Solutions & Technologies, Inc. ("BEST") | Tonya Chandler | ### Employees As of March 2, 2026, we had 46 employees, of which 44 were full-time. Our employees including professional engineers, masters of engineering, and PhDs, as well as sales, support and administrative personnel. We also utilize consultants and independent contractors on an as-needed basis who provide certain specified services, such as professional engineers used from time to time by our engineering group in Tennessee. ## Risk factors As filed, 50,262 characters. Our future results of operations, financial condition and liquidity and the market price for our securities are subject to numerous risks, many of which are driven by factors that we cannot control. The following cautionary discussion of risks, uncertainties and assumptions relevant to our business includes factors we believe could cause our actual results to differ materially from expected and historical results. Other factors beyond those listed below, including factors unknown to us and factors known to us which we have not currently determined to be material, could also adversely affect our business, results of operations, financial condition, prospects and cash flows. Also see “Forward-looking Statements” in Part I, Item I, above. ### Risks relating to our Financial Condition ***We have incurred net losses on an annual basis since our inception and may continue to experience losses and negative cash flow in the future.*** We have not yet generated enough revenue or gross profit from operations to fund our expenses, and, accordingly, we have incurred net losses every year since our inception. For the year ended December 31, 2025 we recorded a net loss of $15,189,000, of which $3,886,000 was a credit loss expense resulting from a customer's contractual defaults (see Note 2, "Allowance for Credit Losses"), and which is the subject of litigation (see Note 14), compared to a net loss of $4,347,000 for the year ended December 31, 2024. At December 31, 2025, we had $3,883,000 in cash and cash equivalents. We have funded the majority of our activities through the issuance of equity securities, both at corporate level (BioLargo Inc.) and through direct third-party investments in our subsidiaries (such as Clyra Medical (see Note 10) and BETI (see Note 9)). Our ability to reach positive cash flow depends on many factors, including our ability to fund sales and marketing activities, the rate of client adoption of our products, and the efforts and success of third parties, such as the companies distributing our medical products. We may continue to incur losses and experience negative cash flows from operations for the foreseeable future, and intend to continue to raise additional capital on acceptable terms. ***Our cash requirements are significant. We will continue to require additional financing to sustain our operations and without it we may not be able to continue operations.*** Our cash requirements and expenses continue to be significant. For the year ended December 31, 2025, we used $8,297,000 cash in operations, and at December 31, 2025, we had a working capital of $51,000 and current assets of $5,114,000. In order to become profitable, we must significantly increase our revenues. We expect to continue to use cash for the foreseeable future as it becomes available to advance our developing technologies, ramp up staffing to accommodate growth and increase support infrastructure, and expect to continue to need to sell our securities to fund operations at both the corporate level (BioLargo Inc.) and through our subsidiaries. Our auditor’s report for the year ended December 31, 2025, includes an explanatory paragraph in their audit opinion stating that our recurring losses from operations raise substantial doubt about our ability to continue as a going concern. We do not currently have sufficient financial resources to fund our operations or those of our subsidiaries. Therefore, we need additional financing to continue these operations. We have relied on private securities offerings, as well as sales of stock to Lincoln Park Capital Fund, LLC (see “Share Purchase Agreement with Lincoln Park” above), to provide cash needed to close the gap between operational revenue and expenses. Our agreement with Lincoln Park expired February 1, 2026. Although we do not intend to enter into a new purchase agreement with Lincoln Park, we are negotiating terms of a similar arrangement with a third party. Furthermore, our ability to rely on private financing from individual investors may change due to many economic factors outside of our control, including whether the United States enters a recession, the Dow Industrial Average or Nasdaq composite decline significantly, interest rates rise, real estate values decline, international events affect the global economy, or many other factors that impact private investors’ willingness to invest in high-risk companies. Thus, while we have been able to rely on private investments in the past, we may not be able to do so in the near future. During the year ended December 31, 2025, we (i) sold $2,122,000 of our common stock to Lincoln Park (see Note 3), (ii) sold $215,000 of our common stock and warrants to accredited investors (see Note 3 and Note 6), (iii) sold $2,339,000 of Clyra Medical common stock and $2,145,000 of Clyra Medical Series B Preferred Stock (see Note 10), and $425,000 from the sale of BETI common stock (see Note 9). The sale of stock is dilutive to our existing stockholders, and the stockholders of our subsidiaries. We intend to continue these financing activities and thus intend to continue to dilute existing and future stockholders. ### Our ability to access capital markets could be limited. From time-to-time, we may need to access capital markets to obtain long-term and short-term financing. However, our ability to access capital markets could be limited or adversely affected by, among other things, the performance of the stock market in general, interest rates, our asset base, our track record in the industries in which we operate, our financial condition, and the health or market perceptions of the US or global economy. In addition, many of the factors that affect our ability to access capital markets, including the liquidity of the overall capital markets in general and the lack of liquidity for our common stock and the state of the economy, among others, are outside of our control. No assurance can be given that we will be able to access capital markets on terms acceptable to us when required to do so, which could adversely affect our business, financial condition and results of operations. ### We expect to incur future losses and may not be able to achieve profitability. Although we are generating revenue from the sale of our products and from providing services, and we expect to generate revenue from new products we are introducing, and eventually from other license or supply agreements, we anticipate net losses and negative cash flow to continue for the foreseeable future until our products are expanded in the marketplace and they gain broader acceptance by resellers and customers. Our current level of sales is not sufficient to support the financial needs of our business. We cannot predict when or if sales volumes will be sufficiently large to cover our operating expenses. We intend to expand our marketing efforts of our products as financial resources are available, and we intend to continue to expand our research and development efforts. Consequently, we will need to generate significant additional revenue or seek additional financings to fund our operations. This has put a proportionate corresponding demand on capital. Our ability to achieve profitability is dependent upon our efforts to deliver a viable product and our ability to successfully bring it to market, which we are currently pursuing. Although our management is optimistic that we will succeed in licensing our technology, we cannot be certain as to timing or whether we will generate sufficient revenue to be able to operate profitably. If we cannot achieve or sustain profitability, then we may not be able to fund our expected cash needs or continue our operations. If we are not able to devote adequate resources to promote commercialization of our technology, then our business plans will suffer and may fail. Because we have limited resources to devote to sales, marketing and licensing efforts with respect to our technology, any delay in such efforts may jeopardize future research and development of technologies and commercialization of our technology. Although our management believes that it can finance commercialization efforts through sales of our securities and possibly other capital sources, if we do not successfully bring our technology to market, our ability to generate revenues will be adversely affected. ### Some of our revenues are dependent on the marketing efforts of third parties. We manufacture and sell private-labeled products to third parties who market those products to businesses, consumers and retailers. We have no control over the marketing budgets, sales activities or efforts of these third parties. We cannot predict if their current level of efforts will increase, decrease, or stay the same. A significant portion of our revenues has historically come from the sale of private label products. In 2025, our largest private-label customer ceased purchasing products from us, and as a result our annual revenues decreased by 56% as compared to the prior year. This customer failed to pay for products purcahsed from us and for license royalties, and we are involved in litigation with them. (See subheading Credit Loss Expense, Pooph Litigation in Results of Operations below.) While we intend to defend our interests vigorously, litigation is inherently uncertain and adverse judgments, settlements, injunctions, or government actions could occur. These outcomes could require substantial payments, restrict or delay aspects of our operations, divert management time, increase insurance or legal costs, or otherwise negatively affect our financial condition and results of operations. We cannot predict the timing, outcome, or ultimate impact of any pending matter, or whether, if we were to prevail in such litigation, we would be able to collect on any judgment we obtain. ***We do not have contracts with customers that require the purchase of a minimum amount of our products.*** Very few of our customers provide us with firm, long-term or short-term volume purchase commitments. As a result, we could have periods during which we have no or limited orders for our products but will continue to have fixed costs. We may not be able to find new customers in a timely manner if we experience no or limited purchase orders. Periods of no or limited purchase orders for our products would adversely affect our business, financial condition and results of operations. ### Supply Chain Challenges As we emerge with new products like our AEC and AOS water treatment systems, and battery storage systems, we may face supply chain challenges, including supply and pricing volatility, that will be beyond our control that might include steel, electrodes, membranes, electronic components (like chips), raw chemicals. We predict that at some level we may face delays and or extended delivery times for systems sold to clients and that could lead to delays in our anticipated growth. Tariffs on imported goods may adversely affect prices of our raw materials. ***We rely on a small number of key supply ingredients in order to manufacture our odor control products, including CupriDyne Clean and our private-label products.*** The raw ingredients used to manufacture our liquid odor control products are readily available from multiple suppliers. However, commodity prices for these ingredients can vary significantly, and the margins that we are able to generate could decline if prices rise. If our manufacturing costs rise significantly, we may be forced to raise the prices for our products, which may reduce their acceptance in the marketplace. ***If any party to which we have outsourced certain functions fails to perform its obligations under agreements with us, the commercialization of our technology could be delayed or curtailed.*** To the extent that we rely on other companies to manufacture the chemicals used in our technology, our products, or sell or market products incorporating our technology, we will be dependent on the timeliness and effectiveness of their efforts. If any of these parties does not perform its obligations in a timely and effective manner, the commercialization of our technology could be delayed or curtailed because we may not have sufficient financial resources or capabilities to continue such efforts on our own. ***If our technology or products incorporating our technology do not gain market acceptance, it is unlikely that we will become profitable.*** The potential markets for products into which our technology can be incorporated are rapidly evolving, and we have many successful competitors including some of the largest and most well-established companies in the world. The commercial success of products incorporating our technology will depend on the adoption of our technology by commercial and consumer end users in various fields. Market acceptance may depend on many factors, including: - the willingness and ability of consumers and industry partners to adopt new technologies from a company with little or no history in the industry; - our ability to convince potential industry partners and consumers that our technology is an attractive alternative to other competing technologies; - our ability to license our technology in a commercially effective manner; - our ability to continue to fund operations while our products move through the process of gaining acceptance, before the time in which we are able to scale up production to obtain economies of scale; and - our ability to overcome brand loyalties. If products incorporating our technology do not achieve a significant level of market acceptance, then demand for our technology itself may not develop as expected, and, in such event, it is unlikely that we will become profitable. ***If we are not able to manage our anticipated growth effectively, we may not become profitable.*** We anticipate that expansion will continue to be necessary to address potential market opportunities for our technologies and our products. Our existing infrastructure is limited. While we believe our current manufacturing processes as well as our office and warehousing provide the basic resources to expand to sales of more than $2 million per month, our infrastructure will need more staffing to support manufacturing, customer service, administration as well as sales/account executive functions. There can be no assurance that we will have the financial resources to create new infrastructure, or that any such infrastructure will be sufficiently scalable to manage future growth, if any. There also can be no assurance that, if we invest in additional infrastructure, we will be effective in expanding our operations or that our systems, procedures or controls will be adequate to support such expansion. In addition, we will need to provide additional sales and support services to our partners if we achieve our anticipated growth with respect to the sale of our technology for various applications. Failure to effectively manage an increase in customer demands could result in a material adverse effect on customer satisfaction, our ability to meet our contractual obligations, and our operating results. ***Some of the products incorporating our technology will require regulatory approval.*** The products in which our technology may be incorporated have both regulated and non-regulated applications. The regulatory approvals for certain applications may be difficult, impossible, time consuming and/or expensive to obtain. While our Company management believes such approvals can be obtained for the applications contemplated, until those approvals from the FDA or the EPA or other regulatory bodies, at the federal and state levels, as may be required are obtained, we may not be able to generate commercial revenues for regulated products. Certain specific regulated applications and their use require highly technical analysis and additional third-party validation and will require regulatory approvals from organizations like the FDA. Certain applications may also be subject to additional state and local agency regulations, increasing the cost and time associated with commercial strategies. Additionally, most products incorporating our technology that may be sold in the European Union (“EU”) will require EU and possibly individual country’s regulatory approval. All such approvals, including additional testing, are time-consuming, expensive and do not have assured outcomes of ultimate regulatory approval. ### Our internal controls are not effective. We have determined that our disclosure controls and procedures and our internal controls over financial reporting are currently not effective. The lack of effective internal controls, has not yet, but could in the future, materially adversely affect our financial condition and ability to implement our business plan, and the accuracy of our consolidated financial statements. As more financial resources become available, we need to invest in additional personnel to better manage the financial reporting processes. ***If we lose our key personnel or are unable to attract and retain additional personnel, we may be unable to achieve profitability.*** Our future success is substantially dependent on the efforts of our senior management, particularly Dennis P. Calvert, our president and chief executive officer. The loss of the services of Mr. Calvert or other members of our senior management may significantly delay or prevent the achievement of product development and other business objectives. Because of the scientific nature of our business, we heavily rely on our ability to attract and retain qualified marketing, scientific and technical personnel. There is intense competition among specialized and technologically-oriented companies for qualified personnel in the areas of our activities. If we lose the services of, or do not successfully recruit, key marketing, scientific and technical personnel, then the growth of our business could be substantially impaired. At present, we do not maintain key man insurance for any of our senior management, although management is evaluating the potential of securing this type of insurance in the future as may be available. As we expand the scope of our operations, we will need to obtain the full-time services of additional senior management and other personnel. Competition for highly-skilled personnel is intense, and there can be no assurance that we will be able to attract or retain qualified senior personnel. Our failure to do so could have an adverse effect on our ability to implement our business plan. As we add full-time senior personnel, our overhead expenses for salaries and related items will increase from current levels and, depending upon the number of personnel we hire and their compensation packages, these increases could be substantial. ***Nondisclosure agreements with employees and others may not adequately prevent disclosure of trade secrets and other proprietary information.*** In order to protect our proprietary technology and processes, we rely in part on nondisclosure agreements with our employees, potential licensing partners, potential manufacturing partners, testing facilities, universities, consultants, agents and other organizations to which we disclose our proprietary information. These agreements may not effectively prevent disclosure of confidential information and may not provide an adequate remedy in the event of unauthorized disclosure of confidential information. In addition, others may independently discover trade secrets and proprietary information, and in such cases we could not assert any trade secret rights against such parties. Costly and time-consuming litigation could be necessary to enforce and determine the scope of our proprietary rights, and failure to obtain or maintain trade secret protection could adversely affect our competitive business position. Since we rely on trade secrets and nondisclosure agreements, in addition to patents, to protect some of our intellectual property, there is a risk that third parties may obtain and improperly utilize our proprietary information to our competitive disadvantage. We may not be able to detect unauthorized use or take appropriate and timely steps to enforce our intellectual property rights. ### We may become subject to product liability claims. As a business that manufactures and markets products for use by consumers and institutions, we may become liable for any damage caused by our products, whether used in the manner intended or not. Any such claim of liability, whether meritorious or not, could be time-consuming and/or result in costly litigation. Although we maintain general liability insurance, our insurance may not cover potential claims of the types described above and may not be adequate to indemnify for all liabilities that may be imposed. Any imposition of liability that is not covered by insurance or is in excess of insurance coverage could harm our business and operating results, and you may lose some or all of any investment you have made, or may make, in our company. ***Litigation or the actions of regulatory authorities may harm our business or otherwise distract our management.*** Substantial, complex or extended litigation could cause us to incur major expenditures and distract our management. For example, lawsuits by employees, former employees, investors, stockholders, partners, customers or others, or actions taken by regulatory authorities, could be very costly and substantially disrupt our business. As a result of our financing activities over time, and by virtue of the number of people that have invested in our company, we face increased risk of lawsuits from investors. Such lawsuits or actions could from time to time be filed against our company and/or our executive officers and directors. Such lawsuits and actions are not uncommon, and we cannot assure you that we will always be able to resolve such disputes or actions on terms favorable to our company. ***If we suffer negative publicity concerning the safety or efficacy of our products, our sales may be harmed.*** If concerns should arise about the safety or efficacy of any of our products that are marketed, regardless of whether or not such concerns have a basis in generally accepted science or peer-reviewed scientific research, such concerns could adversely affect the market for those products. Similarly, negative publicity could result in an increased number of product liability claims, whether or not those claims are supported by applicable law. ***Our revenues and operating results are likely to continue to fluctuate from quarter to quarter.*** We believe that our future operating results will fluctuate due to a variety of factors, including: - delays in product development by us or third parties; - market acceptance of products incorporating our technology; - changes in the demand for, and pricing of, products incorporating our technology; - competition and pricing pressure from competitive products; and - fluctuations in the activities of third parties that market and sell products based on our technologies. Although our revenues have increased year-over-year for the past nine years, much of our revenue is dependent upon the activities of third parties, which are out of our control. We expect our operating expenses will continue to fluctuate significantly in future periods, as we continue to develop and introduce new products to market, and increase our sales, marketing and licensing efforts. Moreover, our operating results in some quarters may not meet the expectations of stock market analysts and investors; in that case, our stock price could decline. ***The licensing of our technology or the manufacture, use or sale of products incorporating our technology may infringe on the patent rights of others, and we may be forced to litigate if an intellectual property dispute arises.*** If we infringe or are alleged to have infringed another party’s patent rights, we may be required to seek a license, defend an infringement action or challenge the validity of the patents in court. Patent litigation is costly and time consuming. We may not have sufficient resources to bring these actions to a successful conclusion. In addition, if we do not obtain a license, do not successfully defend an infringement action or are unable to have infringed patents declared invalid, we may: - incur substantial monetary damages; - encounter significant delays in marketing our current and proposed product candidates; - be unable to conduct or participate in the manufacture, use or sale of product candidates or methods of treatment requiring licenses; - lose patent protection for our inventions and products; or - find our patents are unenforceable, invalid or have a reduced scope of protection Parties making such claims may be able to obtain injunctive relief that could effectively block our company’s ability to further develop or commercialize our current and proposed product candidates in the United States and abroad and could result in the award of substantial damages. Defense of any lawsuit or failure to obtain any such license could substantially harm our company. Litigation, regardless of outcome, could result in substantial cost to, and a diversion of efforts by, our company. ***Our patents are expensive to maintain, our patent applications are expensive to prosecute, and thus we are unable to file for patent protection in many countries.*** Our ability to compete effectively will depend in part on our ability to develop and maintain proprietary aspects of our technology and either to operate without infringing the proprietary rights of others or to obtain rights to technology owned by third parties. Pending patent applications relating to our technology may not result in the issuance of any patents or any issued patents that will offer protection against competitors with similar technology. We must employ patent attorneys to prosecute our patent applications both in the United States and internationally. International patent protection requires the retention of patent counsel and the payment of patent application fees in each foreign country in which we desire patent protection, on or before filing deadlines set forth by the International Patent Cooperation Treaty (“PCT”). We therefore choose to file patent applications only in foreign countries where we believe the commercial opportunities require it, considering our available financial resources and the needs for our technology. This has resulted, and will continue to result, in the irrevocable loss of patent rights in all but a few foreign jurisdictions. Patents we receive may be challenged, invalidated or circumvented in the future, or the rights created by those patents may not provide a competitive advantage. We also rely on trade secrets, technical know-how and continuing invention to develop and maintain our competitive position. Others may independently develop substantially equivalent proprietary information and techniques or otherwise gain access to our trade secrets. ### We are subject to risks related to future business outside of the United States. Over time, we may develop business relationships outside of North America, and as those efforts are pursued, we will face risks related to those relationships such as: - foreign currency fluctuations; - unstable political, economic, financial and market conditions; - import and export license requirements; - trade restrictions; - increases in tariffs and taxes; - high levels of inflation; - restrictions on repatriating foreign profits back to the United States; - greater difficulty collecting accounts receivable and longer payment cycles; - less favorable intellectual property laws, and the lack of intellectual property legal protection; - regulatory requirements; - unfamiliarity with foreign laws and regulations; and - changes in labor conditions and difficulties in staffing and managing international operations. ***The volatility of certain raw material costs may adversely affect operations and competitive price advantages for products that incorporate our technology.*** Most of the chemicals and other key materials that we use in our business, such as minerals, fiber materials and packaging materials, are neither generally scarce nor price sensitive, but prices for such chemicals and materials can be cyclical. Supply and demand factors, which are beyond our control, generally affect the price of our raw materials. We try to minimize the effect of price increases through production efficiency and the use of alternative suppliers, but these efforts are limited by the size of our operations. If we are unable to minimize the effects of increased raw material costs, our business, financial condition, results of operations and cash flows may be materially adversely affected. ***Certain of our product sales historically have been highly impacted by fluctuations in seasons and weather.*** Industrial odor control products have proven highly effective in controlling volatile organic compounds that are released as vapors produced by decomposing waste material. Such vapors are produced with the highest degree of intensity in temperatures between 40 degrees Fahrenheit (5 degrees Celsius) and 140 degrees Fahrenheit (60 degrees Celsius). When weather patterns are cold or in times of precipitation, our clients are less prone to use our odor control products, presumably because such vapors are less noticeable or, in the case of precipitation, can be washed away or altered. This leads to unpredictability in use and sales patterns for, especially, our CupriDyne Clean product line which accounts for 76% of our total revenue. ***There may be battery technologies that we are not aware of, and some of them may be subject to patent applications.*** We may not be aware of technologies that are similar or identical to our liquid sodium battery. We may not be aware of patent applications that have been filed that may include claims that are similar or identical to portions of our liquid sodium battery or our manufacturing process. No assurance can be made that our liquid sodium battery, or our proprietary manufacturing process, does not infringe on the intellectual property rights of third parties. If our technology or manufacturing process infringes on the intellectual property rights of third parties, we may be subject to litigation, or required to pay royalties, to such third parties, and our results of operations and financial condition may be adversely affected. ***We expect to face strong competition for our products from a growing list of established and new competitors.*** The worldwide battery market is highly competitive today and we expect it will become even more so in the future. For example, Tesla is one of the largest companies in the United States as measured by its market capitalization, and sells lithium-ion batteries for grid-scale applications, commercial and home storage, as well as in its vehicles. There are many other well capitalized and established companies that manufacture and/or sell batteries. Many of the companies have significantly greater or better-established resources than we do to devote to the design, development, manufacturing, distribution, promotion, sale and support of their products. This competition may prevent us from entering the marketplace, or if we do, may prevent us from establishing market share. ### There may not be a market for our liquid sodium battery. While we believe that there will be customer demand for our liquid sodium battery provided that we are able to prove its competitive advantages, there is no assurance that there will be any market acceptance of it, or any broad market acceptance. There also may not be broad market acceptance of our liquid sodium battery if competitors offer batteries which are preferred by prospective customers. In such event, there may be a material adverse effect on the company’s results of operations and financial condition, and the company may not be able to achieve its goals. ***Business disruptions could seriously harm our future revenue and financial condition and increase our costs and expenses.*** Our operations, and those of our contractors and consultants, could be subject to pandemics, earthquakes, power shortages, telecommunications failures, water shortages, floods, hurricanes, typhoons, fires, extreme weather conditions, medical epidemics, acts of terrorism, acts of war and other natural or man-made disasters or business interruptions, for which we are predominantly self-insured. The occurrence of any of these business disruptions could seriously harm our operations and financial condition and increase our costs and expenses. We rely in part on third-party manufacturers to produce and process our products or the raw materials used to make our products. Our ability to obtain supplies of our products or raw materials could be disrupted if the operations of these suppliers are affected by a man-made or natural disaster, pandemics, epidemics, or other business interruption. Our corporate headquarters and offices of ONM are in Southern California near major earthquake faults and fire zones. Our operations and financial condition could suffer in the event of a major earthquake, fire or other natural disaster. ### General Risks ***Increased information technology security threats and more sophisticated computer crime pose a risk to us and our subsidiaries, vendors, systems, networks, products and services.*** We rely upon information technology systems and networks in connection with a variety of business activities, some of which are managed by third parties (which we refer to collectively as our “associated third parties”). Additionally, we and our associated third parties collect and store data that is of a sensitive nature, which may include names and addresses, bank account or financial information, and other types of personally identifiable information or sensitive business information. The secure operation of these information technology systems and networks, and the processing and maintenance of this data is critical to our business operations and strategy. We may face attempts to gain unauthorized access to our information technology systems or products or those of our associated third parties for the purpose of improperly acquiring trade secrets or confidential business information. The theft or unauthorized use or publication of our trade secrets and other confidential business information as a result of such an incident could adversely affect our competitive position and the value of our investment in research and development. Threats to our systems and our associated third parties’ systems can derive from human error, fraud, or malice on the part of employees or third parties, or may result from accidental technological failure. Globally, these types of threats have increased in number and severity and it is expected that these trends will continue. These threats pose a risk to the security of our systems and networks and the confidentiality, availability and integrity of our data. Should an attack on our or our associated third parties’ information technology systems and networks succeed, it could expose us and our employees, customers, dealers and suppliers to misuse of information or systems, the compromising of confidential information, manipulation and destruction of data, production downtimes and operations disruptions. The occurrence of any of these events could adversely affect our reputation, competitive position, business, results of operations and cash flows. While we have a cybersecurity program, expenses, damages and claims arising from cybersecurity incidents could cause a material adverse effect on our business. See Part I. Item 1C. Cybersecurity for additional details on our cybersecurity program. ***Economic uncertainties, recession, and domestic or world events and policies may adversely affect our business and operations.*** Domestic and world events continue to create economic uncertainties, including the wars in Iran and the Ukraine, international trade policies, including tariffs, and inflationary pressures. The Federal Reserve could raise interest rates in the United States in response to price inflation. Any myriad of factors could cause a sharp downward correction in stock market. We cannot predict how the foregoing factors will affect the market for our products and services, but the impact may be adverse. If the U.S. economy were to contract into a recession or depression, our existing clients, and potential future clients, may divert their resources to other goods and services, and our business may suffer. ### Risks Relating to our Common Stock ***The sale or issuance of our common stock to any equity line provider causes dilution, and the sale of the shares of common stock acquired by any such provider, or the perception that such sales may occur, could cause the price of our common stock to fall.*** On December 13, 2022, we entered into a purchase agreement with Lincoln Park ("Purchase Agreement"), pursuant to which Lincoln Park agreed to purchase from us at our request up to an aggregate of $10,000,000 of our common stock (subject to certain limitations) from time to time over a period of three years expiring February 1, 2026 (see “Share Purchase Agreement with Lincoln Park” above). Although we have not yet done so, we intend to enter in to a similar agreement with another institutional investor that would allow us to control the timing and amount of any sales of our shares to such party. Sales of our common stock, if any, to such third party will depend on market conditions and other factors to be determined by us, and we may ultimately decide to sell to some, all or none of the shares of our common stock that may be available for us to sell pursuant to any such new agreement. If and when we do enter into a new agreement and sell shares to the third party, after such third party has acquired shares, they may resell all, some or none of those shares at any time or from time to time at its discretion. Therefore, sales of our shares by us could result in substantial dilution to the interests of other holders of our common stock, as well as sales of our stock into the open market causing fluctuations or reductions in the price of our common stock. Additionally, the sale of a substantial number of shares of our common stock to an institutional investor, or the anticipation of such sales, could make it more difficult for us to sell equity or equity-related securities in the future at a time and at a price that we might otherwise desire to effect sales. ### Our common stock is thinly traded and largely illiquid. Our stock is currently quoted on the OTC Markets (OTCQX). Although it is the highest level platform on the OTC Markets, it is not a national exchange, which can prevent institutional investors from trading in our stock, and results in a lower frequency of trades and trading volume than stocks quoted on a national exchange. Continued trading on the OTCQX may also adversely affect our ability to obtain financing in the future due to the decreased liquidity of our shares and other restrictions that certain investors have for investing in securities not traded on a national exchange. While we intend to seek listing on the Nasdaq Stock Market (“Nasdaq”) or another national stock exchange when our company is eligible, there can be no assurance when or if our common stock will be listed on Nasdaq or another national stock exchange. Until then, we expect our stock to remain volatile and lack the liquidity of larger companies. ### The market price of our stock is subject to volatility. Our stock price has been and is likely to continue to be volatile. As a result of this volatility, investors may not be able to sell their common stock at or above their purchase price. The market price of our common stock may fluctuate significantly in response to numerous factors, many of which are beyond our control, including: - developments with respect to patents or proprietary rights; - announcements of technological innovations by us or our competitors; - announcements of new products or new contracts by us or our competitors; - actual or anticipated variations in our operating results due to the level of research and development expenses and other factors; - changes in financial estimates by securities analysts and whether any future earnings of ours meet or exceed such estimates; - conditions and trends in our industry; - new accounting standards; - the size of our public float; - short sales, hedging, and other derivative transactions involving our common stock; - sales of large blocks of our common stock including sales by our executive officers, directors, and significant stockholders; - general economic, political and market conditions and other factors; - our decision to sell our stock to any third party or institutional investor; - the activities of third parties that market and distribute our products, and decisions made by them to increase or decrease such activities, resulting in increases or decreases in product purchases from us and thus our revenues; and - the occurrence of any of the risks described herein. 12 ***You may have difficulty selling our stock because it is deemed a “penny stock” and not quoted on a national exchange.*** Because our common stock is not quoted or listed on a national securities exchange, if the trading price of our common stock remains below $5.00 per share, which we expect for the foreseeable future, trading in our common stock will be subject to the requirements of certain rules promulgated under the Securities Exchange Act of 1934, as amended (the “Exchange Act”), which require additional disclosure by broker-dealers in connection with any trades involving a stock defined as a penny stock (generally, any non-Nasdaq equity security that has a market price of less than $5.00 per share, subject to certain exceptions). Such rules require the delivery, before any penny stock transaction, of a disclosure schedule explaining the penny stock market and the risks associated therewith and impose various sales practice requirements on broker-dealers who sell penny stocks to persons other than established customers and accredited investors (generally defined as an investor with a net worth in excess of $1,000,000 or annual income exceeding $200,000 individually or $300,000 together with a spouse). For these types of transactions, the broker-dealer must make a special suitability determination for the purchaser and have received the purchaser’s written consent to the transaction before the sale. The broker-dealer also must disclose the commissions payable to the broker-dealer and current bid and offer quotations for the penny stock and, if the broker-dealer is the sole market-maker, the broker-dealer must disclose this fact and the broker-dealer’s presumed control over the market. Such information must be provided to the customer orally or in writing before or with the written confirmation of trade sent to the customer. Monthly statements must be sent disclosing recent price information for the penny stock held in the account and information on the limited market in penny stocks. The additional burdens imposed on broker-dealers by such requirements could discourage broker-dealers from effecting transactions in our common stock, which could severely limit the market liquidity of our common stock and the ability of holders of our common stock to sell their shares. ***Because our shares are deemed a “penny stock,” rules enacted by FINRA make it difficult to sell previously restricted stock.*** Rules put in place by the Financial Industry Regulatory Authority (FINRA) require broker-dealers to perform due diligence before depositing unrestricted common shares of penny stocks, and as such, some broker-dealers, including many large national firms (such as eTrade and Charles Schwab), are refusing to deposit previously restricted common shares of penny stocks. We routinely issued non-registered restricted common shares to investors, vendors and consultants. The issuance of such shares is subjected to the FINRA-enacted rules. As such, it can be difficult for holders of restricted stock, including those issued in our private securities offerings, to deposit the shares with broker-dealers and sell those shares on the open market. ***Because we will not pay dividends in the foreseeable future, stockholders will only benefit from owning common stock if it appreciates.*** We have never declared or paid a cash dividend to stockholders. We intend to retain any earnings that may be generated in the future to finance operations. Accordingly, any potential investor who anticipates the need for current dividends from his investment should not purchase our common stock, and must rely on the benefit of owning shares, and presumably a rise in share price. We cannot predict the future price of our stock, and due to the factors enumerated herein, can make no assurance of a future increase in the price of our common stock. ***We regularly issue stock, or stock options, instead of cash, to pay some of our operating expenses. These issuances are dilutive to our existing stockholders.*** We are party to agreements that provide for the payment of, or permit us to pay at our option, securities rather than cash in consideration for services provided to us. We include these provisions in agreements to allow us to preserve cash. We anticipate that we will continue to do so in the future. All such issuances preserve our cash reserve but are also dilutive to our stockholders because they increase (and will increase in the future) the total number of shares of our common stock issued and outstanding, even though such arrangements assist us with managing our cash flow. These issuances also increase the expense amount recorded. ### Our stockholders face further potential dilution in any new financing. During the year ended December 31, 2025, we issued approximately 16 million shares of our common stock. Our private securities offerings typically offer convertible securities, including notes and warrants. Those warrants often include provisions that require investors to pay for the underlying shares with cash, which if executed would generate working capital for the company. Any additional capital that we raise would dilute the interest of the current stockholders and any persons who may become stockholders before such financing. Given the price of our common stock, such dilution in any financing of a significant amount could be substantial. ***Our stockholders face further potential adverse effects from the terms of any preferred stock that may be issued in the future.*** Our certificate of incorporation authorizes 50 million shares of preferred stock. None are outstanding as of the date hereof. In order to raise capital to meet expenses or to acquire a business, our board of directors may issue additional stock, including preferred stock. Any preferred stock that we may issue may have voting rights, liquidation preferences, redemption rights and other rights, preferences and privileges. The rights of the holders of our common stock will be subject to, and in many respects subordinate to, the rights of the holders of any such preferred stock. Furthermore, such preferred stock may have other rights, including economic rights, senior to our common stock that could have a material adverse effect on the value of our common stock. Preferred stock, while providing desirable flexibility in connection with possible acquisitions and other corporate purposes, can also have the effect of making it more difficult for a third party to acquire a majority of our outstanding voting stock, thereby delaying, deferring or preventing a change in control of our company. ### Risks Related to Privacy, Cybersecurity, and Our Technology ***Our business involves the use, transmission and storage of confidential information, and the failure to properly safeguard such information could result in significant reputational harm.*** We may at times collect, store, and transmit information of, or on behalf of, our clients that may include certain types of confidential information that may be considered personal or sensitive, and that are subject to laws that apply to data breaches. We believe that we take reasonable steps to protect the security, integrity, and confidentiality of the information we collect and store, but there is no guarantee that inadvertent or unauthorized disclosure will not occur or that third parties will not gain unauthorized access to this information despite our efforts to protect this information, including through a cyber-attack that circumvents existing security measures and compromises the data that we store. If such unauthorized disclosure or access does occur, we may be required to notify persons whose information was disclosed or accessed. Most states have enacted data breach notification laws and, in addition to federal laws that apply to certain types of information, such as financial information, federal legislation has been proposed that would establish broader federal obligations with respect to data breaches. We may also be subject to claims of breach of contract for such unauthorized disclosure or access, investigation and penalties by regulatory authorities and potential claims by persons whose information was disclosed. The unauthorized disclosure of information, or a cyber-security incident involving data that we store, may result in the termination of one or more of our commercial relationships or a reduction in client confidence and usage of our services. We may also be subject to litigation alleging the improper use, transmission, or storage of confidential information, which could damage our reputation among our current and potential clients and cause us to lose business and revenue. ## Cybersecurity As filed, 1,375 characters. The Company has processes for assessing, identifying, and managing material risks from cybersecurity threats. These processes are integrated into the Company’s overall risk management systems, as overseen by the Company’s chief executive officer and board of directors. The Company engages information technology “managed service providers” (MSPs) to manage the Company’s computer and information systems at its three office locations and remote locations. The MSPs are responsible for evaluating and testing the Company’s risk management systems and assessing and remediating potential cybersecurity incidents as appropriate. The executives in charge of each physical office location are responsible for assessing and managing cybersecurity risks for their locations, and the Company’s chief executive officer is responsible for assessing and managing cybersecurity risks to the Company as a whole. Because none of these individuals has specific training or experience in managing cybersecurity risks, MSPs that have expertise and experience in doing so are retained and relied upon. Our chief executive officer is responsible for escalating any cybersecurity matters as appropriate, in consultation with our legal counsel. Our board of directors is ultimately responsible for oversight of cybersecurity risk management and receives regular reports from Company management. ## Properties As filed, 1,095 characters. Our company owns no real property. We currently lease approximately 9,000 square feet of office and industrial space at 14921 Chestnut Street, Westminster, California. In addition to serving as our principal offices, it is also a manufacturing facility where we manufacture our products, including our CupriDyne Clean Industrial Odor control product, and the home of our subsidiary ONM Environmental. We also lease approximately 22,000 square feet of office, warehouse, lab and manufacturing space at 105 Fordham Road, Oak Ridge, Tennessee, for our professional engineering division, BioLargo Engineering, Science & Technologies, LLC, and our battery company, BioLargo Energy Technologies, Inc. Our subsidiary Clyra Medical leases approximately 450 square feet of office space at 3802 Spectrum Blvd, Tampa Florida and 2,800 of warehouse/flex space at 10770 N. 46th Stret, Unit C-300, Tampa Florida. Our Canadian subsidiary BioLargo Canada leases approximately 1,500 square feet of office and lab space from the University of Alberta in Edmonton, Canada. Our telephone number is (888) 400-2863. ## Legal proceedings As filed, 973 characters. ONM Environmental, Inc., is the defendant in a lawsuit filed by Pooph Inc. in the Orange County, California Superior Court on September 11, 2025. The lawsuit alleges three causes of action, for Breach of Contract, Breach of Implied Covenant of Good Faith and Fair Dealing, and Declaratory judgment, and seeks an unspecified amount of damages, allegedly arising from ONM’s manufacture of pet odor-control products sold by Pooph Inc. BioLargo, Inc., BioLargo Life Technologies, Inc., and ONM Environmental, Inc., filed a lawsuit against Pooph, Inc., and Ikigai Marketing Works, LLC, in the United States District Court, Central District of California, on November 11, 2025, for patent infringement, false advertising, breach of contract, false promise, unfair and fraudulent business practices and constructive fraud, seeking to recover, amongst other damages, the defendants’ failure to pay for product purchases and license royalties in the aggregate amount of $3,821,401. ## Management's discussion and analysis As filed, 30,365 characters. The following discussion and analysis should be read in conjunction with our audited consolidated financial statements and the related notes to the consolidated financial statements included elsewhere in this report. This discussion contains forward-looking statements that involve risks and uncertainties. Such statements, which include statements concerning future revenue sources and concentration, selling, general and administrative expenses, research and development expenses, capital resources, additional financings and additional losses, are subject to risks and uncertainties, including, but not limited to, those discussed above in Part I, Item 1 and elsewhere in this Annual Report, particularly in “Risk Factors,” that could cause actual results to differ materially from those projected. The forward-looking statements set forth in this Annual Report are as of December 31, 2025, unless expressly stated otherwise, and we undertake no duty to update this information. **Results of Operations—Comparison of the years ended December 31, 2025 and 2024** We operate our business in distinct business segments: - ONM Environmental, which manufactures and sells our odor and VOC control products and services, including our flagship product, CupriDyne Clean; - BLEST, which provides professional engineering services supporting our internal business units, advancing innovations like the AEC to remove PFAS contaminants from water, and serving outside clients on a fee for service basis; - Clyra Medical, which develops and sells medical products based on our technology; - BETI, which is developing our proprietary battery technology; - BEST, which sells equipment based on our technology; and - BioLargo Canada, located in Edmonton, Alberta Canada, our primary research and development activities; and - Our corporate operations, which support the operating segments with legal, accounting, human resources, and other services. Our consolidated revenue for the year ended December 31, 2025 was $7,765,000, which is a 56% decrease over the $17,779,000 in revenues for the year ended December 31, 2024. Services revenue increased 96% to $1,998,00, while revenue from product sales decreased 66% to $5,767,000. The increase in service revenues was related to additional engineering consulting service contracts. The decrease in product revenues was almost entirely due to the decrease in the volume of sales to our largest private-label odor-control products customer, Pooph Inc. ### ONM Environmental Our wholly-owned subsidiary ONM Environmental generates revenues through sales of our flagship product CupriDyne Clean industrial odor and VOC control product, by providing design, installation and maintenance services on the systems that deliver CupriDyne Clean at its clients’ facilities, and through sales of consumer products based on our CupriDyne Clean technology. ### Credit Loss Expense, Pooph Litigation Since 2021, ONM Environmental has been selling odor control products for use with pets to Ikigai Holdings LLC, who sold them to consumers and retailers under the brand name "Pooph", pursuant to a Preferred Master Manufacturing Agreement ("PMMA") and License Agreement. On June 6, 2025, the parties amended the PMMA to allow Pooph Inc. to pay past due amounts of $1,378,141 in royalties and $2,385,468 on product invoices through a weekly payment plan bearing 10% interest and maturing July 3, 2026 (the “PMMA Amendment”). These amounts were recorded on our consolidated balance sheets at June 30, 2025, as a note receivable. The PMMA Amendment also modified payment and invoicing terms on existing and future product purchase orders, and allowed BioLargo to withhold product if the payment terms were not met. On August 5, 2025, Pooph Inc. delivered a royalty report due for the second quarter of 2025, but did not pay the $463,520 in royalties due. On August 15, 2025, it failed to make the weekly payment required pursuant to the PMMA Amendment, and has not made a payment since. On September 19, 2025, it disclosed that it had been working independently on developing a new formula for Pooph-branded products to replace BioLargo's formula, and that it was terminating the PMMA, citing our refusal to deliver products. On September 24, 2025, we delivered notice to Pooph that the grant of license was immediately revoked due to Pooph’s failure to pay royalties, and that we were terminating the License Agreement in its entirety with 150 days’ notice. The notice further advised that Pooph is not allowed to market or sell products that incorporate, use, or are based on, in whole or in part, BioLargo’s patents and proprietary information, including but not limited to know-how disclosed to Pooph, and that absent reinstatement of the grant of license, Pooph must immediately stop marketing and selling any such products in its possession, custody or control (or sold through market portals or platforms such as Amazon). On November 11, 2025, we (BioLargo Inc. and ONM Environmental Inc.) filed a lawsuit against Pooph Inc. (and related party Ikigai Marketing Works LLC) in the United States District Court, Central District of California, alleging patent infringement (35 U.S.C. 271), false advertising (15 U.S.C. 1125), and state law claims including breach of contract, false promise, unfair and fraudulent business practices, and constructive fraud. In the suit, we seek (i) an order that the defendants have infringed on our patents, an injunction enjoining defendants from further infringing on our patents, and accounting for defendants' gains and profits; (ii) an order that defendants have violated Section 43(a) of the Lanham Act, an injunction preventing defendants from using product reviews based on our proprietary technology with their newly formulated products, and an accounting and damages for these violations; (iii) compensatory damages for unpaid royalties of $1,667,292; (iv) compensatory damages for unpaid product purchased from ONM Environmental of $2,154,110, (v) compensatory damages in an amount according to proof for false promises and unfair and fraudulent business practices; (vi) treble and/or exemplary damages; and (vii) costs and attorneys fees. Also on November 11, 2025, Pooph Inc. served ONM Environmental with a lawsuit venued in the Orange County, California Superior Court filed September 11, 2025, alleging ONM Environmental breached the terms and the implied covenant of good faith and fair dealing of the Preferred PMMA, seeking damages in an amount to be determined, as well as unjust enrichment, interest, and attorneys fees and costs, arising out of the manufacture and sale of the Pooph-branded products, and ONM Environmental's refusal to fullfil purchase orders while Pooph Inc. was in breach of contract for failure to pay past due monies. ONM Environmental disputes the allegations and intends to vigorously defend the lawsuit. While the outcomes of the lawsuits are uncertain, management believes that the resolutions of these proceedings will not have a material adverse effect on the Company's financial position, results of operations, or cash flows. However, adverse outcomes could materially impact future financial results. During the three months ended September 30, 2025, BioLargo management determined that the note receivable and accounts receivable owed by Pooph Inc. were fully impaired, resulting in a $3,849,000 credit loss expense recorded on our consolidated statements of operations, which reduced operating income and current assets by that amount. ### Revenue (ONM Environmental) ONM Environmental’s revenues for the year ended December 31, 2025, were $5,905,000 a decrease of $9,692,000 (62%) from the same period in 2024. The decrease in revenues was almost entirely due to a decrease in the volume of sales of private label odor-control products (which decreased by $9,100,000). Because Pooph is owned and marketed by a third party, ONM Environmental has no control over the marketing and sales activity or levels of the Pooph brand. Although we believe the success of the Pooph brand demonstrates the viability of our pet-odor control products, and although we are actively seeking a new partner that can capitalize on the prior success, unless a new partner is found, we expect ONM Environmental's revenues for the year ending the year ended December 31, 2026 to decrease as compared to the year ended December 31, 2025. ### Cost of Goods Sold (ONM Environmental) ONM Environmental’s cost of goods sold includes costs of raw materials, contract manufacturing, and portions of depreciation, salaries and expenses related to the manufacturing and installation of its products. As a percentage of revenue, ONM Environmental’s costs of goods decreased 2% in 2025 to 51%. The decrease was related to normal price fluctuations for raw materials. ### Selling, General and Administrative Expense (ONM Environmental) ONM Environmental’s SG&A expenses were $1,324,000 in 2025, compared to $1,357,000 in 2024. We expect these expenses to remain approximately the same in 2026 at the current level of operations. ### Operating Loss and Income (ONM Environmental) ONM Environmental generated an operating loss of $2,317,000 in 2025, compared to operating income totaling $5,920,000 in 2024. The operating loss is primarily due to the decrease in sales volume of Pooph branded products, which has declined in 2025, the credit loss expense for uncollectible account receivables totaling $603,000, and the note receivable credit loss expense totaling $3,283,000. ### BLEST (engineering division) ### Revenue (BLEST) BLEST generated $1,998,000 in third-party service revenues in the year ended December 31, 2025, a 96% increase over the $1,017,000 in third-party service revenues in the year ended December 31, 2024. This increase was due to an increased volume of services provided to existing and new clients, including increased work at U.S. Air Force bases. As BLESTs revenues in 2024 included product revenue related to the Lake Stockholm project, its overall revenues in 2025 decreased as compared to 2024. In 2025 and future periods, product sales of BioLargo proprietary technology will be through BioLargo Equipment Solutions & Technologies, Inc. - BLEST's role will be to provide supporting engineering services for such products, both at the sales and implementation cycles. In addition to providing service to third party clients, BLEST provides services to BioLargo and its subsidiaries for internal BioLargo projects. These services are billed internally, are considered intersegment revenue, and are eliminated in the consolidation of our financial statements. Intersegment revenue is primarily used to further engineer and develop our AEC PFAS treatment system and battery technology. In the year ended December 31, 2025, intersegment revenues totaled $685,000 compared to $1,015,000 in 2024. ### Cost of Goods Sold (BLEST) BLEST’s cost of goods includes employee labor, materials, as well as subcontracted labor costs. In 2025, its cost of goods were 72% of its revenues, versus 74% in 2024. The decrease is related to decreased costs on fixed fee contracts. We expect the cost of services to remain consistent in 2026 based on the contracts currently in progress. ### Selling, General and Administrative Expense (BLEST) BLEST's SG&A expenses were $987,000 in 2025, compared to $872,000 in 2024, due to increased head-count related expenses. We expect these expenses remain consistent in 2026 based on the contracts currently in progress. ### Operating Loss (BLEST) BLEST had an operating loss of $1,091,000 in 2025, compared to an operating loss of $1,453,000 in 2024. This operating loss is reflective of the focus at BLEST on internal BioLargo projects. While we are unable to record revenues generated from services by the engineering group to other BioLargo operating divisions for important projects such as the development of the AOS and AEC technologies, it is important to note that its net loss would be reduced if it were selling these services to a third party at fair market value. Because the subsidiary had a net loss, we invested cash during the year to allow it to maintain operations. ### Clyra Medical Clyra Medical did not generate revenues in the years ended December 31, 2025 or 2024. It received a first purchase order for its ViaCLYR product in February 2026, and expects to record revenue in the three-months ending March 31, 2026. In the year ended December 31, 2025, Clyra had an operating loss totaling $6,065,000, which included $1,168,000 in research and development expenses. In the same period in 2024, the operating loss totaled $3,324,000, which included $827,000 in research and development expenses. The increases in costs and expenses is related to stock option compensation expense and product development expense related to readying for scaled commercialization. In the year ended December 31, 2025, Clyra raised $5,745,000 in debt and equity. In the year ended December 31, 2024, Clyra raised $2,869,000, in debt and equity. From January 1, 2026, through March 4, 2026, Clyra Medical received $1,705,000 and issued unsecured promissory notes in the aggregate principal amount of $1,705,000, bearing interest at the rate of 15% per annum, which mature February 28, 2029, and require interest-only payments until maturity (titled its 2026 Guaranteed Note). Clyra Medical also issued the investors warrants allowing for the purchase of an aggregate 133,282 shares of its common stock at $7.50 per share, expiring February 28, 2031. Payment of the promissory notes are guaranteed by BioLargo Inc. ### BioLargo Energy Technologies (BETI) BioLargo Energy Technologies, Inc. (BETI) is focused on development of our Cellinity battery, which is not yet fully developed and ready for sale, and thus has not generated generate revenue. In 2025, BETI had an operating loss totaling $639,000 , which included $274,000 in research and development expenses. In the same period in 2024, the operating loss totaled $642,000, which included $379,000 in research and development expenses. We do not expect BETI to generate revenue in the year ending December 31, 2026, as it continues its research and development and pre-commercialization activities. ### BioLargo Equipment, Solutions & Technologies (BEST) BioLargo Equipment, Sciences and Technologies, Inc. (BEST), was formed in 2024 to commercialize BioLargo's proprietary water treatment equipment, including its PFAS removal device the AEC. As the first AEC sale occurred prior to the Company's formation, and the sales cycle for advanced water treatment systems is long, BEST has not yet generated revenues. We intend future water treatment projects to be contracted through BEST. BEST had an operating loss totaling $276,000 and $273,000 during 2025 and 2024. #### Selling, General and Administrative Expense – consolidated Our Selling, General and Administrative expense (“SG&A”) include both cash (for example, salaries to employees) and non-cash expenses (for example, stock option compensation expense). Our consolidated SG&A increased by 27% ($2,466,000) in the year ended December 31, 2025, to $11,768,000. Our non-cash expenses (through the issuance of stock and stock options) were $3,613,000 in 2025, compared with $2,479,000 in 2024. Our SG&A expenses included (in thousands): | | December 31, 2025 | December 31, 2024 | | --- | ---: | ---: | | Salaries and payroll related | $4,721 | $3,276 | | Professional fees | 1,081 | 944 | | Consulting | 1,906 | 1,503 | | Office expense | 1,879 | 1,659 | | Rent expense | 565 | 377 | | Depreciation expense | 141 | 150 | | Sales and marketing | 520 | 494 | | Investor relations | 399 | 477 | | Board of director expense | 556 | 422 | | Total | $11,768 | $9,302 | The increases in salaries and payroll related is primarily due to increased option compensation to employees and the associated fair value, and the increased number of employees at Clyra. The increase in professional and consulting fees are primarily from Clyra as it prepares for the commercialization of its products. The increase in sales and marketing was due to increased company activities at Biolargo and at Clyra. Office expense increased due to an increase in square footage of rented space and an increase in general office expenses related to expanded operations. The increase in the Board of Director fees is due Clyra's issuance of equity to its board members. ### Impairment Expense During the years ended December 31, 2025 and 2024, management recognized an impairment expense of $14,000 and $0, respectively, related to BioLargo's noncontrolling interest in its South Korean joint venture. ### Credit Loss Expense During the year ended December 31, 2025, management recognized credit loss expense of $3,849,000 related to an ONM Environmental client (see Credit Loss Expense, Pooph Litigation, above). ### Research and Development In the year ended December 31, 2025, we spent $2,593,000 in the research and development of our technologies and products. This was a decrease of 10% or $289,000 compared to 2024, due to decreased activity by Clyra Medical as it approaches commercialization of its wound irrigation solution products. The research and development activity was related to the development of wound irrigation solution medical products, the AEC water filtration system, and the Cellinity battery products. ### Other Income and Expense Primarily through our wholly owned Canadian subsidiary, we have been awarded more than 90 research grants over the years from various public and private agencies, including the Canadian National Research Institute – Industrial Research Assistance Program (NRC-IRAP), the National Science and Engineering Research Council of Canada (NSERC), and the Metropolitan Water District of Southern California’s Innovative Conservation Program “ICP”. The research grants received are considered reimbursement grants related to costs we incur and therefore are included as Other Income. The amount of grant income decreased $20,000 in the year ended December 31, 2025, to $6,000. Grant funds paid directly to third parties are not included as income in our financial statements. ### Interest expense Our interest expense for the year ended December 31, 2025, was $540,000, an increase of 661% compared with 2024. The significant increase in interest expense is related to Clyra Medical debt, which increased in the year ended December 31, 2025. We expect our interest expense to increase in 2026 as compared with 2025 due to further increased debt obligations at Clyra Medical. ### Net Loss Net loss for the year ended December 31, 2025, was $15,189,000 a loss of $0.04 per share, compared to a net loss for the year ended December 31, 2024, of $4,347,000 a loss of $0.01 per share. This is a year-over-year increase in net loss of 249%. Our net loss this year increased because of the decrease in ONM Environmental revenue and the $3,849,000 credit loss expense associated with an ONM Environmental client (see Credit Loss Expense, Pooph Litigation, above). The net income (loss) per business segment is as follows (in thousands): | Net income (loss) | Year ended December 31, 2025 | Year ended December 31, 2024 | | --- | ---: | ---: | | ONM Environmental | $(2,227) | $5,951 | | BLEST | (1,032) | (1,356) | | Clyra Medical | (6,564) | (3,490) | | BioLargo Canada | (528) | (504) | | BETI | (639) | (642) | | BEST | (276) | (273) | | BioLargo corporate | (3,923) | (4,033) | | Consolidated net loss | $(15,189) | $(4,347) | ### Liquidity and Capital Resources The accompanying consolidated financial statements have been prepared on a going concern basis, which contemplates the realization of assets and the settlement of liabilities and commitments in the normal course of our business. During the year ended December 31, 2025, we generated revenues of $7,765,000, had a net loss of $15,189,000, and used $8,297,000 cash in operations. At December 31, 2025, we had working capital of $51,000, and current assets of $5,114,000. We do not believe gross profits in the year ending December 31, 2026 will be sufficient to fund our current level of operations. We have been, and anticipate that we will continue to be, limited in terms of our capital resources. As of December 31, 2025, our cash and cash equivalents totaled $3,883,000, and our total liabilities included $2,079,000 debt, of which $1,814,000 was owed by Clyra Medical and of that amount, $1,395,000 is due within one year. Therefore, we intend to continue to raise investment capital through the sale of our securities and the securities of our subsidiaries. To meet our cash obligations during the year-ended December 31, 2025, we (i) sold $2,122,000 of our common stock to Lincoln Park Capital Fund, LLC (“Lincoln Park”) (see “Share Purchase Agreement with Lincoln Park” above, and Note 3), (ii) sold $215,000 of our common stock and warrants to accredited investors (see Note 3 and Note 6), (iii) sold $2,339,000, of Clyra Medical common stock and sold $2,145,000 Clyra Medical Series B Preferred stock (see Note 10), and (iv) sold $425,000 of BETI common stock (see Note 9). To reduce our operational cash burdens, we regularly issue officers and vendors stock or options in lieu of cash and anticipate that we will continue to be able to do so in the future. Since January 1, 2026, through March 4, 2026 (see Note 16, Subsequent Events), Clyra Medical has received $1,705,000 and issued three-year promissory notes in that amount, BETI has sold $462,000 of its common stock, and BioLargo Inc. sold $170,704 of common stock to Lincoln Park (prior to the February 1, 2026 expiration of our Purchase Agreement with Lincoln Park). The foregoing factors raise substantial doubt about our ability to continue as a going concern, unless we are able to continue to rely on an institutional equity line such as our arrangement with Lincoln Park or other private financings, and in the long term, attain a reasonable threshold of operating efficiencies and achieve profitable operations by licensing or otherwise commercializing products incorporating our technologies. The consolidated financial statements do not include any adjustments that might be necessary if we are unable to continue as a going concern. ### Critical Accounting Policies Our discussion and analysis of our results of operations and liquidity and capital resources are based on our consolidated financial statements, which have been prepared in accordance with accounting principles generally accepted in the United States. The preparation of these consolidated financial statements requires us to make estimates and judgments that affect the reported amounts of assets, liabilities, revenues and expenses, and disclosure of contingent assets and liabilities. On an ongoing basis, we evaluate our estimates and judgments, including those related to revenue recognition, valuation of offerings of debt with equity or derivative features which include the valuation of the warrant component, any beneficial conversion feature and potential derivative treatment, and share-based payments. We base our estimates on anticipated results and trends and on various other assumptions that we believe are reasonable under the circumstances, including assumptions as to future events. These estimates form the basis for making judgments about the carrying values of assets and liabilities that are not readily apparent from other sources. By their nature, estimates are subject to an inherent degree of uncertainty. Actual results that differ from our estimates could have a significant adverse effect on our operating results and financial position. We believe that the following significant accounting policies and assumptions may involve a higher degree of judgment and complexity than others. The methods, estimates and judgments the Company uses in applying these most critical accounting policies have a significant impact on the results of the Company reports in its consolidated financial statements. ### Revenue Recognition We adopted ASU 2014-09, “Revenue from Contracts with Customers”, Topic 606, on January 1, 2018. The guidance focuses on the core principle for revenue recognition. The core principle of the guidance is that an entity should recognize revenue to depict the transfer of promised goods or services to customers in an amount that reflects the consideration to which the entity expects to be entitled in exchange for those goods or services. To achieve that core principle, an entity should apply the following steps: Step 1: Identify the contract(s) with a customer. Step 2: Identify the performance obligations in the contract. Step 3: Determine the transaction price. Step 4: Allocate the transaction price to the performance obligations in the contract. Step 5: Recognize revenue when (or as) the entity satisfies a performance obligation. We have revenue from two subsidiaries, ONM and BLEST. ONM identifies its contract with the customer through a written purchase order, in which the details of the contract are defined including the transaction price and method of shipment. The only performance obligation is to create and ship the product and each product has separate pricing. ONM recognizes revenue at a point in time when the order for its goods are shipped if its agreement with the customer is FOB ONM’s warehouse facility, and when goods are delivered to its customer if its agreement with the customer is FOB destination. Revenue is recognized with a reduction for sales discounts, as appropriate and negotiated in the customer’s purchase order. ONM also installs misting systems for which it bills on a time and materials basis. It identifies its contract with the customer through a written purchase order in which the details of the time to be billed and materials purchased and an estimated completion date. The performance obligation is the completion of the installation. Revenue is recognized in arrears as the work is performed. BLEST identifies services to be performed in a written contract, which specifies the performance obligations and the rate at which the services will be billed. Each service is separately negotiated and priced. Revenue is recognized as services are performed and completed. BLEST’s contracts typically call for invoicing for time and materials incurred for that contract. A few contracts have called for milestone or fixed cost payments where BLEST bills an agreed-to amount per month for the life of the contract. In these instances, completed work, billed hourly, is recognized as revenue. If the billing amount is greater or lesser than the completed work, a receivable or payable is created. These accounts are adjusted upon additional billings as the work is completed. To date, there have been no discounts or other financing terms for the contracts. ### Warrants Warrants issued with our convertible and non-convertible debt instruments are accounted for under the fair value and relative fair value method. The warrant is first analyzed per its terms as to whether it has derivative features or not. If the warrant is determined to be a derivative and not qualify for equity treatment, then it is measured at fair value using the Black Scholes option model, and recorded as a liability on the balance sheet. The warrant is re-measured at its then current fair value at each subsequent reporting date (it is “marked-to-market”). If the warrant is determined to not have derivative features, it is recorded into equity at its fair value using the Black Scholes option model, however, limited to a relative fair value based upon the percentage of its fair value to the total fair value including the fair value of the convertible note. The warrant relative fair values are also recorded as a discount to the convertible promissory notes. At present, these equity features of the convertible promissory notes have recorded a discount to the convertible notes that is substantially equal to the proceeds received. ### Share-based Payments It is the Company’s policy to expense share-based payments as of the date of grant or over the term of the vesting period in accordance with Auditing Standards Codification Topic 718 “Share-Based Payment.” Application of this pronouncement requires significant judgment regarding the assumptions used in the selected option pricing model, including stock price volatility and employee exercise behavior. Most of these inputs are either highly dependent on the current economic environment at the date of grant or forward-looking expectations projected over the expected term of the award. ### Fair Value Measurement Generally accepted accounting principles establishes a hierarchy to prioritize the inputs of valuation techniques used to measure fair value. The hierarchy gives the highest ranking to the fair values determined by using unadjusted quoted prices in active markets for identical assets (Level 1) and the lowest ranking to fair values determined using methodologies and models with unobservable inputs (Level 3). Observable inputs are those that market participants would use in pricing the assets based on market data obtained from sources independent of the Company. Unobservable inputs reflect the Company’s assumptions about inputs market participants would use in pricing the asset or liability developed based on the best information available in the circumstances. The Company has determined the appropriate level of the hierarchy and applied it to its financial assets and liabilities. Management believes the carrying amounts of the Company’s financial instruments as of December 31, 2025 and 2024, approximate their respective fair values because of the short-term nature of these instruments. Such instruments include cash, accounts receivable, prepaid assets, accounts payable, line of credit, and other assets and liabilities. The carrying amount of debt instruments are believed to approximate fair value as the stated interest rates are reflective of the prevailing market rates. ### Recent Accounting Pronouncements See Note 2 to the Consolidated Financial Statements, “Summary of Significant Accounting Policies – Recent Accounting Pronouncements”, for the applicable accounting pronouncements affecting the Company. ## Controls and procedures As filed, 6,649 characters. ### Evaluation of Disclosure Controls and Procedures We conducted an evaluation, under the supervision and with the participation of management, including our chief executive officer and chief financial officer, of the effectiveness of the design and operation of our disclosure controls and procedures (as defined in Rules 13a-15(e) and 15d-15(e) under the Securities Exchange Act of 1934, as amended) as of the end of the period covered by this Annual Report. Our procedures have been designed to ensure that the information relating to our company, including our consolidated subsidiaries, required to be disclosed in our SEC reports is recorded, processed, summarized and reported within the time periods specified in SEC rules and forms, and is accumulated and communicated to our management, including our chief executive officer and chief financial officer, as appropriate to allow for timely decisions regarding required disclosure. However, our Company is continuing to grow and evolve. The volume of our product sales continues to grow, increasing strain on our accounting systems. And our operations do not yet generate enough cash to fund operations, and thus we rely on financing activities to maintain our level of operations and fund our anticipated growth. In combination, these activities put stress on our overall controls and procedures. Based on this evaluation, our chief executive officer and chief financial officer concluded that as of the evaluation date our disclosure controls and procedures were not effective, due to the material weakness identified below. It should be noted that the design of any system of controls is based in part upon certain assumptions about the likelihood of future events, and there can be no assurance that any design will succeed in achieving its stated goals under all potential future conditions, regardless of how remote. **Management’s Report on Internal Control over Financial Reporting** Our management is responsible for establishing and maintaining adequate internal control over financial reporting, as such term is defined in Exchange Act Rules 13a-15(f) and 15d-15(f). Our internal control over financial reporting includes those policies and procedures that (i) pertain to the maintenance of records that, in reasonable detail, accurately and fairly reflect the transactions and dispositions of the assets; (ii) provide reasonable assurance that transactions are recorded as necessary to permit preparation of financial statements in accordance with generally accepted accounting principles, and that receipts and expenditures are being made only in accordance with authorizations of management and directors; and (iii) provide reasonable assurance regarding prevention or timely detection of unauthorized acquisition, use, or disposition of our assets that could have a material effect on the financial statements. Under the supervision and with the participation of our management, including our chief executive officer and the chief financial officer, we have established internal control procedures in accordance with the guidelines established in the 2013 Framework —Integrated Framework issued by the Committee of Sponsoring Organizations of the Treadway Commission (“COSO”). Management evaluated the effectiveness of our internal controls, and concluded that due to our limited financial and personnel resources, and the fact that we operate our business in three distinct locations in the U.S. and Canada, we continue to have a material weakness in our internal controls with respect to the closing our financial statements. Until the Company has the financial resources to implement more robust automated systems, or to hire additional dedicated accounting personnel, we expect this material weakness to continue. In reaching this conclusion, management considered that despite this weakness, and others identified in past years, the company has not identified material misstatements in prior financial statements and believes that the material weakness identified herein is not likely to lead to a material misstatement in the financial statements contained within this report. Management has concluded that its internal controls over financial reporting are not effective. Management identified a material weakness with respect to deficiencies in its financial closing and reporting procedures. Management believes this is due to a lack of resources. Management intends to add accounting personnel and operating staff and more sophisticated systems in order to improve its reporting procedures and internal controls, subject to available capital. A material weakness is a significant deficiency, or combination of deficiencies, in internal control over financial reporting such that there is a reasonable possibility that a material misstatement of the annual or interim financial statements will not be prevented or detected. While management has recognized the material weakness, nothing additionally has changed in internal controls over financial reporting in the fourth quarter or the fiscal year ended December 31, 2025. This Annual Report does not include an attestation report of the Company’s independent registered public accounting firm regarding internal control over financial reporting. Management’s report was not subject to attestation by the Company’s independent registered public accounting firm pursuant to rules of the SEC that permit the Company to provide only management’s report in this Annual Report. Our management, including our chief executive officer and chief financial officer, does not expect that our disclosure controls or our internal control over financial reporting, or any system we design or implement in the future, will prevent or detect all errors and all fraud. A control system, no matter how well designed and operated, can provide only reasonable, not absolute, assurance that the control system’s objectives will be met. The design of any system of controls is based in part on certain assumptions about the likelihood of future events, and there can be no assurance that any design will succeed in achieving its stated goals under all potential future conditions. ### Changes in Internal Control over Financial Reporting There were no changes in the Company’s internal control over financial reporting during the fourth quarter of 2025, which were identified in connection with management’s evaluation required by paragraph (d) of Rules 13a-15 and 15d-15 under the Exchange Act, that have materially affected, or are reasonably likely to materially affect, the Company’s internal control over financial reporting. Filed Mar 4, 2026. Source: SEC EDGAR, the filing index for accession 0001437749-26-006926. Last ingested by Listed: Nov 2, 2026, 06:21 ET. No prices; not investment advice.