21 institutions reported holding $100.5M of AMPRIUS TECHNOLOGIES INC (AMPX.WS) in SEC 13F filings for 2026-06-30. Largest institutional holders: GROUP ONE TRADING LLC ($32.7M), IMC-Chicago, LLC ($29.5M), LMR Partners LLP ($11.1M), SIMPLEX TRADING, LLC ($9.5M), Caption Management, LLC ($8.4M). Source: SEC Form 13F.
| Rank | Institution | Value | Shares | Change |
|---|---|---|---|---|
| 1 | GROUP ONE TRADING LLC | $32.7M | 2.4M | Added |
| 2 | IMC-Chicago, LLC | $29.5M | 2.1M | Added |
| 3 | LMR Partners LLP | $11.1M | 1.9M | Trimmed |
| 4 | SIMPLEX TRADING, LLC | $9.5M | 688,900 | Trimmed |
| 5 | Caption Management, LLC | $8.4M | 1.4M | Added |
| 6 | HRT FINANCIAL LP | $2.2M | 176,183 | New |
| 7 | DRW Securities, LLC | $2.1M | 356,445 | Added |
| 8 | SG Americas Securities, LLC | $2.0M | 600,000 | New |
| 9 | Janney Montgomery Scott LLC | $928,000 | 158,405 | Added |
| 10 | ARISTEIA CAPITAL, L.L.C. | $829,567 | 142,415 | Trimmed |
| 11 | ZAZOVE ASSOCIATES LLC | $594,709 | 102,096 | Trimmed |
| 12 | BOOTHBAY FUND MANAGEMENT, LLC | $554,275 | 39,991 | Trimmed |
| 13 | JPMORGAN CHASE & CO | $13,520 | 1,000 | Hold |
| 14 | UBS Group AG | $4,752 | 811 | New |
| 15 | Farther Finance Advisors, LLC | $12 | 2 | Hold |
| 16 | D. E. Shaw & Co., Inc. | $0 | 0 | Exited |
| 17 | WOLVERINE ASSET MANAGEMENT LLC | $0 | 0 | Exited |
| 18 | Hudson Bay Capital Management LP | $0 | 0 | Exited |
| 19 | Northwest & Ethical Investments L.P. | $0 | 0 | Exited |
| 20 | Warberg Asset Management LLC | $0 | 0 | Exited |
| 21 | CSS LLC/IL | $0 | 0 | Exited |
Source: SEC Form 13F filings · as of 2026-06-30