Amprius Technologies, Inc. (AMPX) - 2025 Annual Report Summary
Business Context and Reporting Period
This summary covers the fiscal year ended December 31, 2025. Amprius Technologies, Inc. develops and manufactures high-energy-density lithium-ion batteries utilizing proprietary silicon anode technology. The company primarily serves the aviation sector (UAS, HAPS, eVTOL) and light electric vehicles (LEVs). Amprius operates as an emerging growth company and smaller reporting company, utilizing a contract manufacturing strategy to scale production of its SiCore battery platform while maintaining a pilot line in Fremont, California.
Key Financial Metrics
| Metric | 2025 | 2024 |
|---|---|---|
| Revenue | $73.0 million | $24.2 million |
| Gross Profit | $8.3 million | ($18.3 million) loss |
| Gross Margin | 11% | (76)% |
| Net Loss | ($44.0 million) | ($44.7 million) |
| Cash and Cash Equivalents | $90.5 million | $55.2 million |
| Operating Cash Flow | ($31.1 million) used | ($33.4 million) used |
| Financing Cash Flow | $71.0 million provided | $47.2 million provided |
Debt and Liquidity: The company has no debt. As of December 31, 2025, total liabilities were $53.1 million, primarily consisting of operating lease liabilities ($39.9 million). The company completed its $100 million "At Market" sales agreement in December 2025, raising approximately $97.5 million in net proceeds cumulatively.
Material Changes vs. Prior Period
- Revenue Growth: Revenue increased 202% to $73.0 million, driven by a $48.1 million increase in SiCore battery sales and new customer engagements.
- Profitability Improvement: The company achieved a positive gross margin of 11% in 2025, compared to a gross loss of 76% in 2024, due to higher volume sales of SiCore batteries.
- Impairment Charges: "Impairment and other" expenses surged to $22.5 million (from $1.9 million in 2024). This includes a $19.1 million charge related to the decision to terminate the lease for a planned GWh-scale manufacturing facility in Brighton, Colorado, and $3.5 million for retired equipment in Fremont.
- Customer Concentration: One customer accounted for $27.1 million (37%) of total revenue in 2025, compared to three major customers in 2024.
Outlook, Risks, and Management Commentary
- Strategic Pivot: Management is shifting from a capital-intensive owned manufacturing model to a contract manufacturing strategy. The Brighton, Colorado facility lease was terminated in January 2026 for a $20.0 million one-time payment to reduce capital requirements.
- Capacity Expansion: The company is expanding its Fremont pilot line to 10 MWh capacity, accelerated by a $14.8 million contract with the U.S. Defense Innovation Unit (DIU). Through global partners, Amprius has access to over 2.0 GWh of annual SiCore production capacity.
- Government Contracts: The company relies on government contracts (e.g., DIU, U.S. Army) and faces risks related to the National Defense Authorization Act (NDAA), which requires sourcing components from non-"foreign entities of concern."
- Risks: Key risks include reliance on third-party manufacturers (including Berzelius in China), supply chain disruptions, geopolitical tensions, and the need for additional capital to fund operations as the company scales.
Investor Verification Checklist
- Lease Termination Impact: Verify the financial impact of the $20.0 million lease termination payment for the Brighton facility, which will be recorded in Q1 2026.
- Customer Concentration: Assess the risk associated with the single customer representing 37% of 2025 revenue and the stability of that relationship.
- Supply Chain Compliance: Confirm the company's progress in qualifying NDAA-compliant suppliers to maintain eligibility for U.S. government defense contracts.
- Cash Runway: Evaluate the $90.5 million cash balance against the projected burn rate, considering the cessation of the "At Market" financing facility.
- Contract Manufacturing Yields: Monitor the quality and yield rates of SiCore batteries produced by third-party contract manufacturers versus the company's internal pilot line.