AMPRIUS TECHNOLOGIES INC

Amprius Technologies, Inc. develops, manufactures and markets lithium-ion batteries for mobility applications, including aviation, ground and marine vehicles. Our disruptive silicon anode technology is intended to enable batteries with high energy density, high power density and fast charging capabilities over a wide range of operating temperatures. This results in our batteries providing superior performance compared to conventional graphite lithium-ion batteries. Our silicon anodes are a direct drop-in replacement of the graphite anode in traditional lithium-ion batteries, and our manufacturing processes leverage the manufacturing processes for conventional lithium-ion batteries and the related supply chain.

Currently, our batteries are primarily used for existing and emerging aviation applications, including unmanned aerial systems or "UAS", such as drones and high-altitude pseudo satellites or "HAPS". We believe our proprietary technology has the potential for broad application in electric transportation. Our batteries and their performance specifications have been tested and validated for application by various customers, including AALTO Airbus, AeroVironment, BAE Systems, Kraus Hamdani Aerospace, Nokia Drone Networks, Nordic Wing, Teledyne FLIR and the U.S. Army. Our total customer engagements since inception grew to over 500 customers with shipments to hundreds of customers during the year ended December 31, 2025. In addition, from our inception through December 31, 2025, we have shipped over 4.2 million battery cells, which have enabled mission critical applications. Our proprietary silicon anode structures, battery cell designs and manufacturing processes are protected by our portfolio of patents, trade secrets and know-how developed over 15 years of research and development.

Our SiCore batteries were developed in collaboration with Berzelius (Nanjing) Co., Ltd. ("Berzelius"), a former affiliated company. We began limited shipment of SiCore batteries in 2023, which generated a strong demand from our customers. In order to support such demand, we entered into a supply agreement with Berzelius in November 2023 (the "Exclusive Supply Agreement"), which gives us exclusive rights to purchase its proprietary silicon anode materials in the United States, Canada and Mexico. In January 2024, we announced the full commercial launch of our SiCore batteries and accelerated engagement with our addressable markets. As of December 31, 2025, we had access, through our manufacturing supply agreements with our global contract manufacturers, including our participation in a consortium of South Korean companies that contribute capabilities across the lithium-ion battery value chain (the "Amprius Korea Battery Alliance"), to annual production exceeding 2.0 GWh of SiCore batteries in pouch, cylindrical and prismatic formats. These agreements provide us an opportunity to scale production and ship a large volume of SiCore batteries to our customers.

During 2025, we manufactured our SiMaxx batteries in our facility in Fremont, California. To support increased demand of our SiCore batteries, as of December 2025 and going forward into 2026, we are expanding this facility to increase the capacity of our pilot line to 10 MWh and expand our capabilities to support quick turn SiCore customer prototypes. This expansion is accelerated by a $14.8 million contract awarded to us in July 2025, as amended, through the U.S. Government Defense Innovation Unit ("DIU").