42 institutions reported holding $9.3M of BOUNDLESS BIO INC (BOLD) in SEC 13F filings for 2026-03-31. Largest institutional holders: FMR LLC ($3.0M), CITADEL ADVISORS LLC ($1.5M), SECTORAL ASSET MANAGEMENT INC ($746,431), Stonepine Capital Management, LLC ($657,450), VANGUARD CAPITAL MANAGEMENT LLC ($656,911). Source: SEC Form 13F.
| Rank | Institution | Value | Shares | Change |
|---|---|---|---|---|
| 1 | FMR LLC | $3.0M | 2.7M | Added |
| 2 | CITADEL ADVISORS LLC | $1.5M | 1.3M | Trimmed |
| 3 | SECTORAL ASSET MANAGEMENT INC | $746,431 | 678,574 | Hold |
| 4 | Stonepine Capital Management, LLC | $657,450 | 597,682 | Trimmed |
| 5 | VANGUARD CAPITAL MANAGEMENT LLC | $656,911 | 597,192 | New |
| 6 | WELLINGTON MANAGEMENT GROUP LLP | $611,856 | 556,233 | Hold |
| 7 | RENAISSANCE TECHNOLOGIES LLC | $438,900 | 399,000 | Added |
| 8 | Alyeska Investment Group, L.P. | $330,000 | 300,000 | Hold |
| 9 | RBF Capital, LLC | $220,000 | 200,000 | Hold |
| 10 | Ensign Peak Advisors, Inc | $206,250 | 187,500 | Hold |
| 11 | Sio Capital Management, LLC | $180,047 | 163,679 | Hold |
| 12 | GEODE CAPITAL MANAGEMENT, LLC | $140,333 | 127,576 | Added |
| 13 | MILLENNIUM MANAGEMENT LLC | $109,862 | 99,875 | Trimmed |
| 14 | GSA CAPITAL PARTNERS LLP | $107,000 | 96,824 | Added |
| 15 | LANDSCAPE CAPITAL MANAGEMENT, L.L.C. | $94,370 | 85,792 | Trimmed |
| 16 | BlackRock, Inc. | $77,743 | 70,675 | Added |
| 17 | VANGUARD FIDUCIARY TRUST CO | $71,650 | 65,136 | New |
| 18 | BRIDGEWAY CAPITAL MANAGEMENT, LLC | $55,550 | 50,500 | Hold |
| 19 | Walleye Capital LLC | $43,586 | 39,624 | Hold |
| 20 | XTX Topco Ltd | $38,138 | 34,671 | Trimmed |
| 21 | Qube Research & Technologies Ltd | $19,241 | 17,492 | Trimmed |
| 22 | Squarepoint Ops LLC | $18,011 | 16,374 | New |
| 23 | STATE STREET CORP | $17,558 | 15,962 | Hold |
| 24 | MORGAN STANLEY | $14,300 | 13,000 | Hold |
| 25 | ACADIAN ASSET MANAGEMENT LLC | $12,000 | 12,610 | Hold |
Source: SEC Form 13F filings · as of 2026-03-31