AMPX: Amprius Technologies, Inc. insider trading, 5% holders and institutional ownership
From public SEC filings: open-market insider purchases and sales (Form 4, last 180 days), holders of 5% or more (Schedules 13D and 13G) and institutional ownership (Form 13F). Insider and 5% data delayed 48 hours.
Insider trading
0 open-market buys totaling - and 0 sales totaling - in the last 180 days.
Activist and 5% holders
| Filed | What | Holder | Stake | Change | Filing |
|---|---|---|---|---|---|
| 2026-08-10 | Fell below 5% | JANE STREET GROUP, LLC | 3.30% | SEC | |
| 2026-07-27 | 13G amendment | BlackRock, Inc. | 7.40% | SEC |
Institutional ownership (Q2 2026)
261 institutions reported holding $1.32B of Amprius Technologies, Inc. on Form 13F (245 the quarter before). 60 opened a new position and 45 sold out. Shares held by institutions: +15%.
| Largest holders | Shares | Value |
|---|---|---|
| BlackRock, Inc. | 11,335,092 | $157.10M |
| VANGUARD CAPITAL MANAGEMENT LLC | 5,562,985 | $77.10M |
| MORGAN STANLEY | 5,105,505 | $70.76M |
| TWO SIGMA INVESTMENTS, LP | 4,318,630 | $59.86M |
| UBS Group AG | 4,072,269 | $56.44M |
| GEODE CAPITAL MANAGEMENT, LLC | 3,520,655 | $48.81M |
| JANE STREET GROUP, LLC | 3,401,071 | $47.14M |
| STATE STREET CORP | 3,240,285 | $44.91M |
| GOLDMAN SACHS GROUP INC | 2,542,294 | $35.24M |
| JUPITER ASSET MANAGEMENT LTD | 2,133,397 | $29.57M |
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