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EX-99.1

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EXHIBIT 99.1

Exhibit 99.1

SOLID

POWER REPORTS SECOND QUARTER 2026 RESULTS

LOUISVILLE,

Colo., August 4, 2026 – Solid Power, Inc. (Nasdaq: SLDP), a leading developer of solid-state battery technology, today announced its operational and financial results for the second quarter and first half of 2026.

Recent Business Highlights

·Improved our electrolyte performance through our work under the Joint Evaluation Agreement with Samsung SDI and BMW.

·Advanced our discussions with industry leading partners regarding a potential joint venture for commercial-scale electrolyte production in the Republic of Korea.

·Execution of our continuous manufacturing pilot line remains on schedule. Installation of major equipment continues to advance in preparation for equipment acceptance testing, targeted for completion in the third quarter. Plant validation and operational startup remain planned for the fourth quarter of 2026.

·Completed Stage 1 audit of the ISO 9001 certification process in the second quarter with Stage 2 scheduled for the third quarter.

·Successfully completed the Line Installation Agreement (LIA) with SK On, receiving the associated milestone payment. Currently in negotiations for a new collaboration agreement.

·Continued execution of financial discipline, remaining on track to deliver cash investments within the current year guidance range of $85 to $100 million.

“During the second quarter, we made real progress against our strategic priorities, including our partner relationships, JV opportunities and operational capabilities," said John Van Scoter, President and Chief Executive Officer of Solid Power. “We remain on track in advancing our new continuous manufacturing line and are progressing towards ISO 9001 certification as we further strengthen our commercial readiness and quality management system. We are also encouraged by the performance of our electrolyte in the first half of the year. Together, these milestones and our strong liquidity position reinforce our confidence in our differentiated technology, our ability to execute, and our path toward commercialization.”

Second Quarter 2026 Financial Highlights

Solid Power reported revenue and grant income of ($0.3) million in the second quarter of 2026 and $2.8 million during the first half of 2026. Revenue and grant income recognized included revenue from our collaboration agreement with SK On and grant income from the assistance agreement with the U.S. Department of Energy. During the second quarter, Solid Power recorded a $1.2 million reversal of previously recognized revenue through a cumulative catch-up adjustment. The adjustment was driven by a change in our assumptions related to certain milestone payments.

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Operating expenses were $30.0 million in the second quarter of 2026 compared to $29.4 million in the first quarter of 2026 with expenses remaining largely consistent. Second quarter 2026 operating loss was $30.3 million, and net loss was $23.8 million, or $0.11 per share.

Balance Sheet and Liquidity

Solid Power’s liquidity position remains strong. Total liquidity as of June 30, 2026, was $419.3 million as shown below.

(in thousands) June 30, 2026 December 31, 2025

Cash and cash equivalents $24,284 $21,607

Available-for-sale securities

395,042 314,843

Total liquidity $419,326 $336,450

As of June 30, 2026, contract assets and accounts receivables were $3.2 million and total current liabilities were $17.2 million. Solid Power continues to have no debt financing.

Second quarter 2026 capital expenditures totaled $6.3 million, primarily representing costs for construction of our continuous electrolyte production pilot line.

Webcast and Conference Call

Solid Power will host a conference call at 2:30 p.m. MT (4:30 p.m. ET) today, August 4, 2026. Participating on the call will be John Van Scoter, President and Chief Executive Officer, and Linda Heller, Chief Financial Officer.

The call may be accessed through a live audio webcast on Solid Power’s Investor Relations website at www.solidpowerbattery.com/investor-relations. An audio replay will be available at the same location.

About Solid Power, Inc.

Solid Power is developing solid-state battery technology to enable the next generation of batteries for the fast-growing EV and other markets. Solid Power’s core technology is its electrolyte material, which Solid Power believes can enable extended driving range, longer battery life, improved safety, and lower cost compared to traditional lithium-ion. Solid Power’s business model – selling its electrolyte to cell manufacturers and licensing its cell designs and manufacturing processes – distinguishes the company from many of its competitors who plan to be commercial battery manufacturers. Ultimately, Solid Power endeavors to be a leading producer and distributor of sulfide-based solid electrolyte material for powering both EVs and other applications. For more information, visit http://www.solidpow

EX-99.1

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EXHIBIT 99.1

Exhibit 99.1

SOLID

POWER REPORTS FIRST QUARTER 2026 RESULTS

LOUISVILLE,

Colo., May 5, 2026 – Solid Power, Inc. (Nasdaq: SLDP), a leading developer of solid-state battery technology, today announced its operational and financial results for the first quarter of 2026.

Recent Business Highlights

·Completed site acceptance testing for the SK On pilot cell line.

·Began facilities construction and completed factory acceptance testing of all key equipment for our continuous manufacturing pilot line for sulfide electrolyte production; commissioning remains on track for the end of 2026.

·Provided Samsung SDI with electrolyte under the Joint Evaluation Agreement with Samsung SDI and BMW and continued sampling to other customers.

·Continued to explore potential partners for commercial-scale electrolyte production in the Republic of Korea.

·Maintained financial discipline and completed a $130 million registered direct offering.

“Completion of site acceptance testing marks an important moment in our partnership with SK On and the final milestone under the line installation agreement,” said John Van Scoter, President and Chief Executive Officer of Solid Power. “We are proud that cell production lines using our technology are now on three continents—at our facilities in Colorado and our partners’ facilities in Germany and the Republic of Korea. We are encouraged by our progress in the first quarter of 2026 and remain focused on supporting our customers this year.”

First Quarter 2026 Financial Highlights

Solid Power delivered $3.1 million in revenue and grant income during the first quarter of 2026. Revenue recognized was primarily attributable to progress towards the site acceptance testing milestone under our line installation agreement with SK On. Grant income recognized consisted of performance on an assistance agreement with the U.S. Department of Energy.

Operating expenses were $29.4 million in the first quarter of 2026 compared to $30.0 million in the first quarter of 2025, with the reduction driven by timing of supplier and material shipments. First quarter 2026 operating loss was $26.3 million, and net loss was $13.0 million, or $(0.06) per share.

Balance Sheet and Liquidity

Solid Power’s liquidity position remains strong. Total liquidity as of March 31, 2026, was $435.3 million, as shown below.

(in thousands) March 31, 2026 December 31, 2025

Cash and cash equivalents $31,509 $21,607

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Available-for-sale

securities 403,763 314,843

Total liquidity $435,272 $336,450

As of March 31, 2026, contract assets and accounts receivables were $12.7 million and total current liabilities were $17.1 million. Solid Power raised proceeds, net of fees and expenses, of $121.3 million from a registered direct offering during the first quarter of 2026.

First quarter 2026 capital expenditures totaled $1.7 million, primarily representing costs for construction of a continuous electrolyte production pilot line.

Webcast and Conference Call

Solid Power will host a conference call at 2:30 p.m. MT (4:30 p.m. ET) today, May 5, 2026. Participating on the call will be John Van Scoter, President and Chief Executive Officer, and Linda Heller, Chief Financial Officer.

The call may be accessed through a live audio webcast on Solid Power’s Investor Relations website at www.solidpowerbattery.com/investor-relations. An audio replay will be available at the same location.

About Solid Power, Inc.

Solid Power is developing solid-state battery technology to enable the next generation of batteries for the fast-growing EV and other markets. Solid Power’s core technology is its electrolyte material, which Solid Power believes can enable extended driving range, longer battery life, improved safety, and lower cost compared to traditional lithium-ion. Solid Power’s business model – selling its electrolyte to cell manufacturers and licensing its cell designs and manufacturing processes – distinguishes the company from many of its competitors who plan to be commercial battery manufacturers. Ultimately, Solid Power endeavors to be a leading producer and distributor of sulfide-based solid electrolyte material for powering both EVs and other applications. For more information, visit http://www.solidpowerbattery.com/.

Forward-Looking

Statements

All statements other than statements of present or historical fact contained herein are “forward-looking statements” within the meaning of Section 27A of the Securities Act of 1933, as amended, and Section 21E of the Securities Exchange Act of 1934, as amended, including Solid Power’s or its management team’s expectations, objectives, beliefs, intentions or strategies regarding the future. When used herein, the words “could,” “should,” “will,” “may,” “believe,” “anticipate,” “intend,” “estimate,” “expect,” “project,” “plan,” “outlook,” “seek,” the negative of such terms and other similar expressions are intended to identify forward-looking statements, a

EX-99.1

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EXHIBIT 99.1

Exhibit 99.1

SOLID

POWER REPORTS FULL YEAR 2025 RESULTS

LOUISVILLE,

Colo., February 24, 2026 – Solid Power, Inc. (Nasdaq: SLDP), a leading developer of solid-state battery technology, today announced its operational and financial results for the full year 2025 and provided its outlook and objectives for 2026.

Recent Business Highlights

·Announced a Joint Evaluation Agreement with Samsung SDI and BMW to progress the development of all-solid-state batteries, marking meaningful progress on our path towards commercialization and validating our electrolyte sampling efforts.

·Conducted detailed design for a continuous electrolyte production pilot line, which we expect to install and commission by the end of 2026.

·Executed on our line installation agreement with SK On, completing factory acceptance testing and nearing completion of site acceptance testing at SK On’s facility.

·Advanced electrolyte innovation and performance by leveraging internal feedback and customer input to drive expected improvements.

·Remained fiscally disciplined, with 2025 cash investment coming in at the lower end of our expected range of $85 million to $95 million, and raised net proceeds of $89.4 million through sales of common stock under an at-the-market (ATM) offering program.

"2025 was a year of strong progress for Solid Power," said John Van Scoter, President and Chief Executive Officer of Solid Power. "We advanced our electrolyte technology and executed on our roadmap toward scalable production. We made encouraging progress with our partners on multiple fronts, ranging from BMW’s introduction of an i7 test vehicle featuring our cells and solid-state battery technology to our progress installing a pilot cell manufacturing line at SK On’s facility.”

2025 Financial Highlights

Solid Power delivered $21.7 million in revenue during 2025, an increase of $1.6 million compared to 2024. The increase was driven primarily by work performed under our line installation agreement with SK On.

Operating expenses were $122.6 million in 2025 compared to $125.5 million in 2024 driven by research and development costs and equipment purchases and services performed in support of the SK On agreements. 2025 operating loss was $100.8 million, and 2025 net loss was $93.4 million, or $0.51 per share.

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Balance Sheet and Liquidity

Solid Power’s liquidity position remains strong. Total liquidity as of December 31, 2025, was $336.5 million, an increase of $9.0 million compared to December 31, 2024, as shown below.

December 31,

(in thousands)

2025

2024

Cash and cash equivalents

$ 21,607

$ 25,413

Available-for-sale securities

314,843

302,057

Total liquidity

$ 336,450

$ 327,470

As of December 31, 2025, contract assets and accounts receivables were $9.6 million and total current liabilities were $16.8 million. Solid Power raised net proceeds of $56.0 million under an at-the-market (ATM) offering program during the fourth quarter of 2025, bringing 2025 net proceeds from the ATM to $88.8 million.

2025 capital expenditures totaled $10.2 million, primarily representing costs for planned construction of our continuous electrolyte production pilot line. Our 2025 final cash investment of $84.5 million, which includes cash used in operations and capital expenditures, came in at the lower end of our revised cash investment guidance.

2026 Outlook

Solid Power remains committed to delivering on the following key objectives for 2026:

·Strengthen relationships with our partners through continued execution.

·Continue executing on our electrolyte development roadmap, including exploring potential partnership opportunities for commercial-scale electrolyte production.

·Promote electrolyte product competitiveness, leveraging the Electrolyte Innovation Center and cell research and development to support customer success.

·Remain fiscally disciplined while continuing to invest appropriately in technology development and process improvements.

The company expects 2026 cash investment, representing cash used in operations and capital expenditures, to be in the range of $85 million to $100 million.

“In 2026, we will continue to drive toward commercialization of our ASSB technology. We started the year off strong with a $130 million registered direct offering in January,” said Van Scoter. “This funding surpassed our initial expectations and serves to strengthen our financial position, extend our runway, and support advancement of our electrolyte technology and progress toward commercialization.”

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Webcast and Conference Call

Solid Power will host a conference call at 2:30 p.m. MT (4:30 p.m. ET), today, February 24, 2026. Participating on the call will be John Van Scoter, President and Chief Executive Officer, and Linda Heller, Chief Financial Officer.

The call may be accessed through a live audio webcast on Solid Power’s Investor Relations website at www.solidpowerbattery.com/investor-relations. An audi