Who Owns AMPRIUS TECHNOLOGIES INC (AMPX.WS)? -- Institutional Holders (2026-03-31)
24 institutions reported holding $129.6M of AMPRIUS TECHNOLOGIES INC (AMPX.WS) in SEC 13F filings for 2026-03-31. Largest institutional holders: LMR Partners LLP ($30.8M), IMC-Chicago, LLC ($23.1M), GROUP ONE TRADING LLC ($22.2M), SIMPLEX TRADING, LLC ($13.9M), ARISTEIA CAPITAL, L.L.C. ($8.3M). Source: SEC Form 13F.
| Rank | Institution | Value | Shares | Change |
|---|
| 1 | LMR Partners LLP | $30.8M | 4.5M | Added |
| 2 | IMC-Chicago, LLC | $23.1M | 1.4M | Added |
| 3 | GROUP ONE TRADING LLC | $22.2M | 1.3M | Added |
| 4 | SIMPLEX TRADING, LLC | $13.9M | 826,900 | Added |
| 5 | ARISTEIA CAPITAL, L.L.C. | $8.3M | 1.2M | Added |
| 6 | BOOTHBAY FUND MANAGEMENT, LLC | $7.9M | 470,000 | Hold |
| 7 | Caption Management, LLC | $7.4M | 1.1M | Added |
| 8 | CSS LLC/IL | $5.2M | 754,893 | New |
| 9 | Hudson Bay Capital Management LP | $5.1M | 741,715 | Added |
| 10 | DRW Securities, LLC | $2.3M | 335,173 | New |
| 11 | WOLVERINE ASSET MANAGEMENT LLC | $1.5M | 213,225 | Trimmed |
| 12 | Janney Montgomery Scott LLC | $1.1M | 158,305 | Trimmed |
| 13 | Warberg Asset Management LLC | $434,184 | 63,200 | New |
| 14 | D. E. Shaw & Co., Inc. | $202,665 | 29,500 | Trimmed |
| 15 | Northwest & Ethical Investments L.P. | $17,160 | 26,000 | New |
| 16 | JPMORGAN CHASE & CO | $14,720 | 1,000 | Added |
| 17 | Farther Finance Advisors, LLC | $12 | 2 | Hold |
| 18 | STIFEL FINANCIAL CORP | $0 | 0 | Exited |
| 19 | Cetera Investment Advisers | $0 | 0 | Exited |
| 20 | Fort Baker Capital Management LP | $0 | 0 | Exited |
| 21 | FIRST SABREPOINT CAPITAL MANAGEMENT LP | $0 | 0 | Exited |
| 22 | HIGHBRIDGE CAPITAL MANAGEMENT LLC | $0 | 0 | Exited |
| 23 | TORONTO DOMINION BANK | $0 | 0 | Exited |
| 24 | MILLENNIUM MANAGEMENT LLC | $0 | 0 | Exited |
Source: SEC Form 13F filings · as of 2026-03-31