Amprius Technologies, Inc.

Amprius Technologies, Inc. is a leading developer and manufacturer of high-energy and high-power lithium-ion batteries, specializing in advanced silicon anode technology. Headquartered in Fremont, California, the company's mission is to deliver the highest energy density battery cells on the market, enabling longer range, faster charging, and higher payloads across various applications without compromising performance.

The company's product portfolio includes silicon anode lithium-ion batteries under the SiMaxx™ and SiCore™ platforms. SiMaxx batteries are noted for delivering up to 450 Wh/kg and 1,150 Wh/L, with third-party validation reaching 500Wh/kg and 1,300 Wh/L, while SiCore batteries offer up to 400 Wh/kg. These advanced battery solutions cater to critical market segments such as unmanned aerial systems (drones), manned aviation, electric vehicles (EVs and light electric vehicles), AI & Robotics, and defense applications.

Under the leadership of CEO Tom Stepien, who assumed the role in May 2025 (effective January 1, 2026), Amprius Technologies has achieved significant milestones. In March 2026, the company was recognized by TIME as one of America's Top GreenTech Companies and secured a $21 million purchase order for electric two and three-wheelers. Additionally, Amprius announced a strategic U.S.-based manufacturing partnership with Nanotech Energy in February 2026 to scale domestic silicon anode battery production. The company reported strong financial performance for Q4 2025, with a 137% year-over-year revenue growth and a 24% gross margin, achieving positive EBITDA ahead of schedule. Amprius is expanding its manufacturing capabilities with a MWh-scale facility in Fremont and GWh-scale partnerships, including a new facility in Brighton, Colorado.

Latest updates

Amprius Investor Roadshow Signals Defense Focus, Capital Needs

Event summary

  • Amprius is presenting at AUVSI Xponential (May 11-14) with VP of Sales Ronnie Tao discussing NDAA-compliant battery solutions for drones.
  • CEO Tom Stepien will participate in an invite-only Advanced Air Mobility Workshop in Bonny Doon, CA on May 13.
  • CFO Ricardo Rodriguez will present at the Needham Technology, Media, & Consumer Conference (May 12-13) and host a webcast.
  • Stepien and Rodriguez will meet with investors at the B. Riley Flagship Investor Conference (May 20) and the Craig-Hallum Annual Institutional Investor Conference (May 28).

The big picture

Amprius's aggressive investor outreach and focus on defense applications highlight a strategic shift towards securing government contracts and potentially raising capital. The company's silicon anode technology offers a significant performance advantage, but scaling production while maintaining margins remains a key challenge. The Advanced Air Mobility workshop underscores the company’s ambition to capture a share of a potentially large, but still speculative, market.

What we're watching

Defense Spending
The emphasis on NDAA compliance suggests Amprius is prioritizing government contracts, which will be crucial for revenue predictability given the company's reliance on contract manufacturing.
Capital Needs
The extensive investor roadshow indicates Amprius may be seeking additional capital to support scaling production and potentially fund further R&D, given the capital-light contract manufacturing model.
Air Mobility Adoption
The Advanced Air Mobility Workshop participation signals Amprius's commitment to this nascent market, but the pace of adoption and regulatory approvals will determine the long-term viability of this segment.
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