Amprius Technologies AMPX Institutional Ownership

Ownership Summary

Amprius Technologies, Inc. (NYSE:AMPX) has 242 institutional investors with active 13F positions as of March 2026.

• These investors collectively held 61.5% of Amprius Technologies's outstanding shares in March 2026, up from 56.0% in December 2025.
• Their total shares held in AMPX increased 48.94% quarter over quarter, and separately, investors owning Amprius Technologies increased 144.44% from a year ago.
• Among the 242 funds, 171 bought more Amprius Technologies shares, 56 sold down, and 15 held their ground.
• The aggregate institutional position in Amprius Technologies amounted to 84.21Mn shares as of March 2026, up by 27.67Mn shares quarter on quarter, and up 62.64Mn shares year over year.
• As of March 31, 2026, BlackRock, Inc. held the largest stake in Amprius Technologies with 9.23Mn shares, accounting for 6.74% of total shares outstanding.
• Leading buyers of Amprius Technologies shares for the quarter ending March 2026 were VANGUARD CAPITAL MANAGEMENT LLC (4.91Mn), JANE STREET GROUP, LLC (3.95Mn), TWO SIGMA INVESTMENTS, LP (2.07Mn), MASSACHUSETTS FINANCIAL SERVICES CO /MA/ (2.02Mn), PRICE T ROWE ASSOCIATES INC /MD/ (1.9Mn).
• The biggest sellers of Amprius Technologies for the quarter ending March 2026 included Goldman Sachs Group Inc (2.16Mn), SUSQUEHANNA INTERNATIONAL GROUP, LLP (1.6Mn), DEUTSCHE BANK AG\ (1.08Mn), VOLORIDGE INVESTMENT MANAGEMENT, LLC (1.07Mn), Invesco Ltd. (813.11K).
• Per Business Quant, the top 10 investors in AMPX for the quarter ending March 2026 include BlackRock, Inc. (9.23Mn), VANGUARD CAPITAL MANAGEMENT LLC (4.91Mn), JANE STREET GROUP, LLC (4.16Mn), DRIEHAUS CAPITAL MANAGEMENT LLC (3.79Mn), TWO SIGMA INVESTMENTS, LP (3.51Mn), Morgan Stanley (3.16Mn), GEODE CAPITAL MANAGEMENT, LLC (2.81Mn), State Street Corp (2.71Mn), UBS Group AG (2.31Mn), Goldman Sachs Group Inc (2.23Mn).