Amprius Technologies Announces Completion and Termination of At-The-Market Equity Offering Program

About this update from Amprius Technologies, Inc.

FREMONT, Calif., January 12, 2026 --( BUSINESS WIRE )-- Amprius Technologies, Inc. ("Amprius" or the "Company") (NYSE: AMPX), a leader in next-generation lithium-ion batteries with its Silicon Anode Platform, today announced it has completed all sales under its at-the-market ("ATM") equity offering program. Under the program, originally established on October 2, 2023, the Company was authorized to offer and sell shares of the Company’s common stock, par value $0.0001 per share (the "Common Stock"), having an aggregate offering price of up to $100.0 million. The Company issued an aggregate of 25.5 million shares of Common Stock under the program, resulting in aggregate net proceeds to the Company of approximately $97.5 million. During the three months ended December 31, 2025, the Company sold shares of Common Stock resulting in aggregate net proceeds of approximately $19.6 million at an average price of $11.17 per share. These sales completed and in effect terminated the program. As of December 31, 2025, the Company’s unaudited cash and cash equivalents were approximately $91.9 million. For further information, please see the Company's current report on Form 8-K to be filed with the Securities and Exchange Commission on January 12, 2026. About Amprius Technologies, Inc. Amprius Technologies, Inc. is a leading manufacturer of high-energy and high-power lithium-ion batteries, producing the industry’s highest-known energy density cells. The Company’s commercially available batteries deliver up to 520 Wh/kg and 1,150 Wh/L. The Company’s corporate headquarters is in Fremont, California, USA where it maintains an R&D lab and a pilot line for the fabrication of silicon anode cells. For additional information, please visit amprius.com and the Company’s LinkedIn page. View source version on businesswire.com: https://www.businesswire.com/news/home/20260112790044/en/ Contacts Investors Tom Colton, Greg Bradbury Gateway Group, Inc. 949-574-3860 [email protected] Media Zach Kadletz, Brenlyn Motlagh Gateway Group, Inc. 949-574-3860 [email protected]

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