Amprius Technologies (NYSE: AMPX) is an advanced battery technology company that designs and manufactures high-energy-density lithium-ion cells using proprietary 100% silicon anode materials. Revenue comes from battery cell sales and U.S. government contracts, including a $14.8 million contract with the Defense Innovation Unit (DIU) as of the 10-K filed March 6, 2026. The company has been commercially producing batteries since 2018 and went public via SPAC merger completed September 14, 2022. Amprius reported a net loss of $44.0 million for the year ended December 31, 2025. Manufacturing is executed through a global contract manufacturing strategy, with a 10 MWh pilot line in Fremont, California under development. The company terminated a planned 774,000 square foot facility in Brighton, Colorado, recording a $19.1 million impairment charge and agreeing to a $20.0 million lease termination payment on January 30, 2026. CEO Thomas M. Stepien signed the March 6, 2026 filing.

Revenue model

Battery cell sales on a transactional basis and U.S. government contracts, including defense-related programs with the Department of Defense and the DIU. The $14.8 million DIU contract partially funds the Fremont manufacturing pilot line build-out (per 10-K filed 2026-03-06).

Products and services

SiMaxx Generation 1 cells: 100% silicon anode lithium-ion batteries with specific energy approximately double that of conventional graphite cells, enabling fast charging and operation in extreme environments (as of December 31, 2025). SiCore cells: silicon anode batteries developed in collaboration with Berzelius, featuring drop-in compatibility with graphite anode manufacturing equipment. Both product lines target high-energy-density applications including aviation, light electric vehicles (LEVs), and defense.

Customers and end markets

Defense industry customers, including U.S. government programs and customers operating in conflict zones where combat drones are deployed. Aviation and LEV end markets. The U.S. Department of Defense, via the DIU, is a disclosed contract customer (per 10-K filed 2026-03-06). The company does not currently produce batteries for electric vehicles.

Value-chain role

Battery cell designer and manufacturer, using an outsourced global contract manufacturing model for volume production. Operates a 10 MWh manufacturing pilot line in Fremont, California for development-stage production. Sells finished battery cells to OEM and defense customers.

Geographic exposure

Primary operations in Fremont, California. Previously planned expansion in Brighton, Colorado was terminated as of January 30, 2026. Defense customers include those in jurisdictions experiencing military conflict (per 10-K filed 2026-03-06). Contract manufacturing is global.

Competitors

Established lithium-ion battery manufacturers (unnamed in filing), New entrants developing silicon anode battery technologies (unnamed in filing)

Source: SEC 10-K, filed 2026-03-06

Industry: Miscellaneous Electrical Machinery, Equipment & Supplies