Amprius TechnologiesAMPX.WSPreferred / convertible
13F holders, Q3 2025 (September 30)18holders +7
11new positions
3sold out
1famous investor
$3.82avg. 13F price*
At the end of Q3 2025, 18 institutions reported holding Amprius Technologies Inc. (AMPX.WS) in their 13F filings, up 7 from Q2 2025. 11 opened new positions and 3 sold out. The largest holders were LMR Partners LLP ($15.8M), Aristeia Capital, L.L.C. ($3.5M) and Caption Management, LLC ($2.5M). One famous investor held it David E. Shaw ( of D. E. Shaw & Co.'s portfolio).
- Company
- Amprius Technologies Inc.
- CUSIP
- 03214Q116
- Latest filing quarter
- Q2 2026
History
Number of 13F holders
Total Exit/New Position Q2 2025 → Q3 2025
| Institutions | Total Value | |
|---|---|---|
| New Positions | 11 | $12.7M |
| Exits | 3 | $49K |
All 13F filers, Q2 2025 → Q3 2025: 4,489,451 shares bought and 419,718 shares sold, net +4,069,733 shares. Counts holders who added, trimmed, opened or closed a position; split-adjusted.
Ownership 18 holders
| LMR Partners LLP | — | Add +46.4% | 4,312,373 | $15.8M |
| Aristeia Capital, L.L.C. | — | New | 959,777 | $3.5M |
| Caption Management, LLC | — | New | 682,810 | $2.5M |
| Hudson Bay Capital Management LP | — | New | 563,582 | $2.1M |
| Boothbay Fund Management, LLC | — | New | 194,524 | $2.0M |
| Janney Montgomery Scott LLC | — | New | 279,670 | $1.0M |
| D. E. Shaw & Co. | — | No change | 267,000 | $977K |
| Wolverine Asset Management LLC | — | Reduce -5.0% | 209,101 | $765K |
| Meteora Capital, LLC | — | New | 150,000 | $549K |
| Toronto Dominion Bank | — | Reduce -42.2% | 144,500 | $529K |
| Fort Baker Capital Management LP | — | New | 138,221 | $506K |
| CSS LLC | — | New | 114,343 | $418K |
| Stifel Financial Corp. | — | Reduce -86.3% | 33,000 | $121K |
| Warberg Asset Management LLC | — | New | 29,000 | $106K |
| Clear Street Group Inc. | — | — | 20,000 | $73K |
| Cetera Investment Advisers | — | New | 10,000 | $37K |
| UBS Group AG | — | New | 1,046 | $4K |
| Farther Finance Advisors, LLC | — | No change | 2 | $7 |
"% of holder's portfolio" is AMPX.WS's weight in each manager's 13F, not the share of Amprius Technologies Inc. the manager owns.