BOLD · Company research
Boundless Bio, Inc. Common Stock (BOLD): Ownership & Institutional Holders
Reported institutional positions. Filing dates and sources matter.
RESEARCH CONTEXT
Understand the numbers
Reported institutional positions. Filing dates and sources matter. Use period, currency, units and source fields when interpreting values.
58records availableHealthcare
Ownership & Institutional Holders data
Database-backed records only
| holder name | cik | period end | shares held | market value | ownership percent | shares change | shares change percent | filing date | data source |
|---|---|---|---|---|---|---|---|---|---|
| MERCER GLOBAL ADVISORS INC /ADV | 853758 | Tue Jun 30 2026 00:00:00 GMT+0000 (Coordinated Universal Time) | 50 | 125 | — | — | — | Aug 11, 2026 | SEC_13F_DATASET |
| HRT FINANCIAL LP | 1475597 | Tue Jun 30 2026 00:00:00 GMT+0000 (Coordinated Universal Time) | 116288 | 290 | — | — | — | Aug 14, 2026 | SEC_13F_DATASET |
| BNP PARIBAS FINANCIAL MARKETS | 1166588 | Tue Jun 30 2026 00:00:00 GMT+0000 (Coordinated Universal Time) | 176 | 440 | — | — | — | Aug 13, 2026 | SEC_13F_DATASET |
| XTX Topco Ltd | 1828301 | Tue Jun 30 2026 00:00:00 GMT+0000 (Coordinated Universal Time) | 33361 | 83403 | — | — | — | Aug 14, 2026 | SEC_13F_DATASET |
| CITADEL ADVISORS LLC | 1423053 | Tue Jun 30 2026 00:00:00 GMT+0000 (Coordinated Universal Time) | 145049 | 362623 | — | — | — | Aug 14, 2026 | SEC_13F_DATASET |
| Affinity Asset Advisors, LLC | 1773195 | Tue Jun 30 2026 00:00:00 GMT+0000 (Coordinated Universal Time) | 250000 | 625000 | — | — | — | Aug 13, 2026 | SEC_13F_DATASET |
| MORGAN STANLEY | 895421 | Tue Jun 30 2026 00:00:00 GMT+0000 (Coordinated Universal Time) | 13000 | 32500 | — | — | — | Aug 13, 2026 | SEC_13F_DATASET |
| Tower Research Capital LLC (TRC) | 1533421 | Tue Jun 30 2026 00:00:00 GMT+0000 (Coordinated Universal Time) | 348 | 870 | — | — | — | Aug 11, 2026 | SEC_13F_DATASET |
| Pure Financial Advisors, LLC | 1571556 | Tue Jun 30 2026 00:00:00 GMT+0000 (Coordinated Universal Time) | 10100 | 25250 | — | — | — | Aug 17, 2026 | SEC_13F_DATASET |
| STATE STREET CORP | 93751 | Tue Jun 30 2026 00:00:00 GMT+0000 (Coordinated Universal Time) | 15962 | 39905 | — | — | — | Aug 7, 2026 | SEC_13F_DATASET |
| GSA CAPITAL PARTNERS LLP | 1362033 | Tue Jun 30 2026 00:00:00 GMT+0000 (Coordinated Universal Time) | 72353 | 181 | — | — | — | Aug 6, 2026 | SEC_13F_DATASET |
| Stonepine Capital Management, LLC | 1440771 | Tue Jun 30 2026 00:00:00 GMT+0000 (Coordinated Universal Time) | 154595 | 386488 | — | — | — | Aug 14, 2026 | SEC_13F_DATASET |
| Rangeley Capital, LLC | 1517796 | Tue Jun 30 2026 00:00:00 GMT+0000 (Coordinated Universal Time) | 74000 | 185000 | — | — | — | Aug 14, 2026 | SEC_13F_DATASET |
| RBF Capital, LLC | 1134621 | Tue Jun 30 2026 00:00:00 GMT+0000 (Coordinated Universal Time) | 200000 | 500000 | — | — | — | Aug 14, 2026 | SEC_13F_DATASET |
| TANG CAPITAL MANAGEMENT LLC | 1232621 | Tue Jun 30 2026 00:00:00 GMT+0000 (Coordinated Universal Time) | 2559875 | 6399688 | — | — | — | Aug 14, 2026 | SEC_13F_DATASET |
| VANGUARD CAPITAL MANAGEMENT LLC | 2100119 | Tue Jun 30 2026 00:00:00 GMT+0000 (Coordinated Universal Time) | 614923 | 1537308 | — | — | — | Aug 13, 2026 | SEC_13F_DATASET |
| China Universal Asset Management Co., Ltd. | 1906594 | Tue Jun 30 2026 00:00:00 GMT+0000 (Coordinated Universal Time) | 16900 | 42250 | — | — | — | Jul 24, 2026 | SEC_13F_DATASET |
| ARCH Venture Management, LLC | 1274403 | Tue Jun 30 2026 00:00:00 GMT+0000 (Coordinated Universal Time) | 2694095 | 6735238 | — | — | — | Aug 14, 2026 | SEC_13F_DATASET |
| UBS Group AG | 1610520 | Tue Jun 30 2026 00:00:00 GMT+0000 (Coordinated Universal Time) | 2 | 5 | — | — | — | Aug 13, 2026 | SEC_13F_DATASET |
| BlackRock, Inc. | 2012383 | Tue Jun 30 2026 00:00:00 GMT+0000 (Coordinated Universal Time) | 58851 | 147128 | — | — | — | Aug 7, 2026 | SEC_13F_DATASET |
| GEODE CAPITAL MANAGEMENT, LLC | 1214717 | Tue Jun 30 2026 00:00:00 GMT+0000 (Coordinated Universal Time) | 96053 | 240132 | — | — | — | Aug 12, 2026 | SEC_13F_DATASET |
| Ensign Peak Advisors, Inc | 1454984 | Tue Jun 30 2026 00:00:00 GMT+0000 (Coordinated Universal Time) | 159835 | 399588 | — | — | — | Aug 14, 2026 | SEC_13F_DATASET |
| PRELUDE CAPITAL MANAGEMENT, LLC | 1387508 | Tue Jun 30 2026 00:00:00 GMT+0000 (Coordinated Universal Time) | 83998 | 209995 | — | — | — | Aug 14, 2026 | SEC_13F_DATASET |
| BRIDGEWAY CAPITAL MANAGEMENT, LLC | 1107261 | Tue Jun 30 2026 00:00:00 GMT+0000 (Coordinated Universal Time) | 128000 | 320000 | — | — | — | Aug 14, 2026 | SEC_13F_DATASET |
| FMR LLC | 315066 | Tue Jun 30 2026 00:00:00 GMT+0000 (Coordinated Universal Time) | 1332980 | 3332450 | — | — | — | Aug 13, 2026 | SEC_13F_DATASET |
| Caitong International Asset Management Co., Ltd | 1963355 | Tue Jun 30 2026 00:00:00 GMT+0000 (Coordinated Universal Time) | 10443 | 26108 | — | — | — | Aug 5, 2026 | SEC_13F_DATASET |
| JANE STREET GROUP, LLC | 1595888 | Tue Jun 30 2026 00:00:00 GMT+0000 (Coordinated Universal Time) | 45870 | 114675 | — | — | — | Aug 14, 2026 | SEC_13F_DATASET |
| Qube Research & Technologies Ltd | 1729829 | Tue Jun 30 2026 00:00:00 GMT+0000 (Coordinated Universal Time) | 20207 | 50518 | — | — | — | Aug 14, 2026 | SEC_13F_DATASET |
| WELLINGTON MANAGEMENT GROUP LLP | 902219 | Tue Jun 30 2026 00:00:00 GMT+0000 (Coordinated Universal Time) | 556233 | 1390583 | — | — | — | Aug 14, 2026 | SEC_13F_DATASET |
| SUPERSTRING CAPITAL MANAGEMENT LP | 1931118 | Tue Jun 30 2026 00:00:00 GMT+0000 (Coordinated Universal Time) | 55356 | 138390 | — | — | — | Aug 14, 2026 | SEC_13F_DATASET |
| VANGUARD FIDUCIARY TRUST CO | 933478 | Tue Jun 30 2026 00:00:00 GMT+0000 (Coordinated Universal Time) | 65136 | 162840 | — | — | — | Aug 13, 2026 | SEC_13F_DATASET |
| RENAISSANCE TECHNOLOGIES LLC | 1037389 | Tue Jun 30 2026 00:00:00 GMT+0000 (Coordinated Universal Time) | 471570 | 1178925 | — | — | — | Aug 13, 2026 | SEC_13F_DATASET |
| SBI Securities Co., Ltd. | 1851815 | Tue Jun 30 2026 00:00:00 GMT+0000 (Coordinated Universal Time) | 2 | 5 | — | — | — | Jul 23, 2026 | SEC_13F_DATASET |
| State Street Corporation | 93751 | Tue Jun 30 2026 00:00:00 GMT+0000 (Coordinated Universal Time) | 15962 | 39905000 | — | — | — | Sep 22, 2026 | SEC_13F_HR |
| JPMORGAN CHASE & CO | 19617 | Tue Jun 30 2026 00:00:00 GMT+0000 (Coordinated Universal Time) | 169 | 414 | — | — | — | Aug 12, 2026 | SEC_13F_DATASET |
| Northern Trust Corp | 73124 | Tue Jun 30 2026 00:00:00 GMT+0000 (Coordinated Universal Time) | 34824 | 87060000 | — | — | — | Aug 13, 2026 | SEC_13F_HR |
| Blackrock, Inc. | 2012383 | Tue Jun 30 2026 00:00:00 GMT+0000 (Coordinated Universal Time) | 4089 | 10223000 | — | — | — | Aug 7, 2026 | SEC_13F_HR |
| NORTHERN TRUST CORP | 73124 | Tue Jun 30 2026 00:00:00 GMT+0000 (Coordinated Universal Time) | 34824 | 87060 | — | — | — | Aug 13, 2026 | SEC_13F_DATASET |
| Financial Management Professionals, Inc. | 1568132 | Tue Jun 30 2026 00:00:00 GMT+0000 (Coordinated Universal Time) | 2 | 5 | — | — | — | Jul 9, 2026 | SEC_13F_DATASET |
| ACADIAN ASSET MANAGEMENT LLC | 916542 | Tue Jun 30 2026 00:00:00 GMT+0000 (Coordinated Universal Time) | 146757 | 365 | — | — | — | Aug 13, 2026 | SEC_13F_DATASET |
| ADAR1 Capital Management, LLC | 1940272 | Tue Jun 30 2026 00:00:00 GMT+0000 (Coordinated Universal Time) | 1968216 | 4920540 | — | — | — | Aug 14, 2026 | SEC_13F_DATASET |
| Alyeska Investment Group, L.P. | 1453072 | Tue Jun 30 2026 00:00:00 GMT+0000 (Coordinated Universal Time) | 300000 | 750000 | — | — | — | Aug 14, 2026 | SEC_13F_DATASET |
| MILLENNIUM MANAGEMENT LLC | 1273087 | Tue Jun 30 2026 00:00:00 GMT+0000 (Coordinated Universal Time) | 478639 | 1196598 | — | — | — | Aug 14, 2026 | SEC_13F_DATASET |
| Cormorant Asset Management, LP | 1583977 | Tue Jun 30 2026 00:00:00 GMT+0000 (Coordinated Universal Time) | 1000000 | 2500000 | — | — | — | Aug 14, 2026 | SEC_13F_DATASET |
| Optiver Holding B.V. | 1859606 | Tue Mar 31 2026 00:00:00 GMT+0000 (Coordinated Universal Time) | 168 | 185 | — | — | — | Jun 2, 2026 | SEC_13F_DATASET |
| Ensign Peak Advisors, Inc | 1454984 | Tue Mar 31 2026 00:00:00 GMT+0000 (Coordinated Universal Time) | 187500 | 206250 | — | — | — | Aug 18, 2026 | SEC_13F_DATASET |
| State Street Corporation | 93751 | Tue Mar 31 2026 00:00:00 GMT+0000 (Coordinated Universal Time) | 15962 | 17558000 | — | — | — | May 15, 2026 | SEC_13F_HR |
| Blackrock, Inc. | 2012383 | Tue Mar 31 2026 00:00:00 GMT+0000 (Coordinated Universal Time) | 2961 | 3257000 | — | — | — | May 13, 2026 | SEC_13F_HR |
| Citigroup Inc. | 831001 | Tue Mar 31 2026 00:00:00 GMT+0000 (Coordinated Universal Time) | 8837 | 9721000 | — | — | — | May 11, 2026 | SEC_13F_HR |
| Ensign Peak Advisors, Inc | 1454984 | Wed Dec 31 2025 00:00:00 GMT+0000 (Coordinated Universal Time) | 187500 | 225000 | — | — | — | Aug 18, 2026 | SEC_13F_DATASET |
| Northern Trust Corp | 73124 | Wed Dec 31 2025 00:00:00 GMT+0000 (Coordinated Universal Time) | 189475 | 227370000 | — | — | — | Feb 17, 2026 | SEC_13F_HR |
| State Street Corporation | 93751 | Wed Dec 31 2025 00:00:00 GMT+0000 (Coordinated Universal Time) | 15962 | 19154000 | — | — | — | Feb 13, 2026 | SEC_13F_HR |
| Citigroup Inc. | 831001 | Wed Dec 31 2025 00:00:00 GMT+0000 (Coordinated Universal Time) | 25073 | 30088000 | — | — | — | Feb 13, 2026 | SEC_13F_HR |
| Blackrock, Inc. | 2012383 | Wed Dec 31 2025 00:00:00 GMT+0000 (Coordinated Universal Time) | 2961 | 3553000 | — | — | — | Feb 12, 2026 | SEC_13F_HR |
| Ensign Peak Advisors, Inc | 1454984 | Tue Sep 30 2025 00:00:00 GMT+0000 (Coordinated Universal Time) | 187500 | 230625 | — | — | — | Aug 18, 2026 | SEC_13F_DATASET |
| Goldman Sachs Group Inc. | 886982 | Tue Sep 30 2025 00:00:00 GMT+0000 (Coordinated Universal Time) | 14299 | 17588000 | — | — | — | Nov 14, 2025 | SEC_13F_HR |
| State Street Corporation | 93751 | Tue Sep 30 2025 00:00:00 GMT+0000 (Coordinated Universal Time) | 15962 | 19633000 | — | — | — | Nov 14, 2025 | SEC_13F_HR |
| Blackrock, Inc. | 2012383 | Tue Sep 30 2025 00:00:00 GMT+0000 (Coordinated Universal Time) | 2961 | 3642000 | — | — | — | Nov 12, 2025 | SEC_13F_HR |
Informational research only, not financial advice. Forecasts are uncertain and can be wrong.