News Release

•Net sales of $1.6 billion; Record volume sold of 5.3 GW

•Net income per diluted share of $4.24

•Gross cash balance of $2.0 billion; Net cash balance of $1.5 billion

•2.7 GW gross bookings since our last earnings call with an average selling price of 30.9 cents per watt, excluding contract pricing adjusters

•Contracted sales backlog of 53.7 GW, valued at $16.4 billion, as of September 30, 2025

TEMPE, Arizona, October 30, 2025 – First Solar, Inc. (Nasdaq: FSLR) (the “Company”) today announced financial results for the third quarter ended September 30, 2025, and updated its 2025 guidance.

Net sales for the third quarter were $1.6 billion, an increase of $0.5 billion from the prior quarter. The increase in net sales was primarily due to an increase in the volume of modules sold to third parties.

The Company reported third quarter net income per diluted share of $4.24, compared to net income per diluted share of $3.18 in the second quarter of 2025.

Cash, cash equivalents, restricted cash, restricted cash equivalents, and marketable securities, less debt at the end of the third quarter, increased to $1.5 billion from $0.6 billion at the end of the prior quarter. The increase was primarily due to higher cash receipts from module sales, including advance payments for future sales, and favorable changes in working capital.

“As a result of our disciplined approach to balancing growth, liquidity, and profitability, we’ve further strengthened our position through the commissioning of our fifth U.S. manufacturing facility, enhancing our liquidity position, and delivering record sales,” said Mark Widmar, Chief Executive Officer. “While trade and policy developments have introduced new challenges for many in our industry, we continue to differentiate ourselves by offering pricing and delivery certainty, enabling us to respond effectively to evolving demand drivers and reinforce our leadership.”

Our 2025 guidance has been updated as follows:

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(1)Assumes $155 million to $165 million of ramp and underutilization costs and $1.56 billion to $1.59 billion of Section 45X tax credits.

(2)Assumes $90 million of production start-up expense.

(3)Assumes $245 million to $255 million of production start-up expense, ramp and underutilization costs, and $1.56 billion to $1.59 billion of Section 45X tax credits.

(4)Defined as cash, cash equivalents, restricted cash, restricted cash equivalents, and marketable securities, less expected debt at the end of 2025.

The guidance figures presented above are forward-looking statements that are subject to a variety of assumptions and estimates. Investors are encouraged to listen to the conference call and to review the accompanying materials, which contain more information about First Solar’s third quarter 2025 financial results, 2025 guidance, and financial outlook.

First Solar has scheduled a conference call for today, October 30, 2025, at 4:30 p.m. ET, to discuss this announcement. A live webcast of this conference call and accompanying materials are available at investor.firstsolar.com. A replay of the webcast will also be available on the Investors section of the Company’s website approximately two hours after the conclusion of the call and remain available for 30 days.

First Solar, Inc. (Nasdaq: FSLR) is America’s leading photovoltaic (“PV”) solar technology and manufacturing company. The only U.S.-headquartered company among the world’s largest solar manufacturers, First Solar is focused on competitively and reliably enabling power generation needs with our advanced, uniquely American thin film PV technology. Developed at research and development (“R&D”) labs in California and Ohio, our technology represents the next generation of solar power generation, providing a competitive, high-performance, and responsibly produced alternative to conventional crystalline silicon PV solar modules. Our PV solar modules are produced using a fully integrated, continuous process that does not rely on Chinese crystalline silicon supply chains. For more information, please visit www.firstsolar.com.

This release contains forward-looking statements which are made pursuant to safe harbor provisions of the Private Securities Litigation Reform Act of 1995. All statements in this release, other than statements of historical fact, are forward-looking statements. These forward-looking statements include, but are not limited to, statements concerning: demand for solar technology generally and for our technology specifically, including in the U.S. market, and our positioning to serve such demand; new capacity coming online; our expectations regarding the political and trade environment and its impacts; production and delivery of our modules; our financial guidance for 2025, including future financial results, net sales, gross margin, operating expenses, operating income, earnings per diluted share, net cash balance, capital expenditures, expected earnings cadence, volume sold, bookings, and expected module shipments; products and our business and financial objectives for 2025; the availability of benefits under certain production linked incentive programs, and the impact of the Internal Revenue Code including the Section 45X tax credits; and the impact of the implementation of new tariffs.

These forward-looking statements are often characterized by the use of words such as “estimate,” “expect,” “anticipate,” “project,” “plan,” “intend,” “seek,” “believe,” “forecast,” “foresee,” “likely,” “may,” “should,” “goal,” “target,” “might,” “will,” “could,” “predict,” “continue,” “contingent,” and the negative or plural of these words and other comparable terminology. Forward-looking statements are only predictions based on our current expectations and our projections about future events and therefore speak only as of the date of this release. You should not place undue reliance on these forward-looking statements. We undertake no obligation to update any of these forward-looking statements for any reason, whether as a result of new information, future developments, or otherwise. These forward-looking statements involve known and unknown risks, uncertainties, and other factors that may cause our actual results, levels of activity, performance, or achievements to differ materially from those expressed or implied by our forward-looking statements. These factors include, but are not limited to: structural imbalances in global supply and demand for PV solar modules; our competitive position and other key competitive factors; the market for renewable energy, including solar energy; the modification, reduction, elimination, or expiration of government subsidies, economic incentives, tax incentives, renewable energy targets, and other support for on-grid solar electricity applications; the impact of public policies, such as tariffs, export controls, or other trade remedies imposed on solar cells and modules or related raw materials or equipment; interest rate fluctuations and our customers’ ability to secure financing; our ability to execute on our long-term strategic plans, including our ability to secure financing and realize the potential benefits of strategic acquisitions and investments; the loss of any of our large customers, or the inability of our customers and counterparties to perform under their contracts with us, including through terminations by customers of any contract in part or in full; our ability to execute on our solar module technology and cost reduction roadmaps; the performance of our solar modules upon installation; our ability to improve the wattage of our solar modules; our ability to incorporate technology improvements into our manufacturing process, including the implementation of our Copper Replacement (“CuRe”) program; our ability to attract new customers and to develop and maintain existing customer and supplier relationships; general economic and business conditions, including those influenced by U.S., international, and geopolitical events and conflicts; environmental responsibility, including with respect to cadmium telluride (“CdTe”) and other semiconductor materials; claims under our limited warranty obligations; changes in, or the failure to comply with, government regulations and environmental, health, and safety requirements; effects arising from and results of pending litigation; future collection and recycling costs for solar modules covered by our module collection and recycling program or otherwise as required by external laws and regulations; supply chain disruptions; our ability to protect or successfully commercialize our intellectual property; our ability to prevent and/or minimize the impact of cybersecurity incidents or information or security breaches; our continued investment in research and development; the supply and price of key raw materials (including CdTe, tellurium, and tellurium compounds), components, and manufacturing equipment; our ability to construct new production facilities to support new product lines; evolving corporate governance and public disclosure regulations and expectations, including with respect to environmental, social, and governance matters; our ability to avoid manufacturing interruptions, including during the ramp of our Series 7 module manufacturing facilities; our ability to attract, train, retain, and successfully integrate key talent into our team; the severity and duration of public health threats, and the potential impact on our business, financial condition, and results of operations; and the matters discussed under the captions “Risk Factors” and “Management’s Discussion and Analysis of Financial Condition and Results of Operations” of our most recent Annual Report on Form 10-K, as supplemented by our other filings with the Securities and Exchange Commission.

investor@firstsolar.com                            media@firstsolar.com