Boundless BioBOLD
13F holders, Q3 2025 (September 30)At the end of Q3 2025, 35 institutions reported holding Boundless Bio Inc. (BOLD) in their 13F filings, down 9 from Q2 2025. 1 opened new positions and 10 sold out. The largest holders were FMR LLC ($3.8M), Nextech Invest Ltd. ($1.5M) and Citadel Advisors ($1.1M). 3 famous investors held it, including Ken Griffin (0.0% of Citadel Advisors's portfolio), Jim Simons / Peter Brown (0.0% of Renaissance Technologies's portfolio) and Israel Englander (0.0% of Millennium Management's portfolio).
- Company
- Boundless Bio Inc.
- CUSIP
- 10170A100
- Latest filing quarter
- Q2 2026
History
Number of 13F holders
Total Exit/New Position Q2 2025 → Q3 2025
| Institutions | Total Value | |
|---|---|---|
| New Positions | 1 | $207 |
| Exits | 10 | $123K |
All 13F filers, Q2 2025 → Q3 2025: 620,727 shares bought and 786,709 shares sold, net −165,982 shares. Counts holders who added, trimmed, opened or closed a position; split-adjusted.
Ownership 35 holders
| FMR LLC | 0.00% | Reduce -0.9% | 3,098,071 | $3.8M |
| Nextech Invest Ltd. | 0.23% | No change | 1,228,069 | $1.5M |
| Citadel Advisors | 0.00% | Add +5.5% | 876,412 | $1.1M |
| Sectoral Asset Management Inc. | 0.52% | No change | 678,574 | $835K |
| Vanguard Group Inc. | 0.00% | Add +18.4% | 569,657 | $701K |
| Wellington Management Group LLP | 0.00% | No change | 556,233 | $684K |
| Stonepine Capital Management, LLC | 0.41% | Add +289.4% | 413,453 | $509K |
| Alyeska Investment Group, L.P. | 0.00% | No change | 300,000 | $369K |
| Redmile Group, LLC | 0.03% | Reduce -58.3% | 245,458 | $302K |
| Renaissance Technologies | 0.00% | Add +84.8% | 223,562 | $275K |
| RBF Capital, LLC | 0.01% | No change | 200,000 | $246K |
| Northern Trust Corp. | 0.00% | Reduce -8.1% | 190,801 | $235K |
| Ensign Peak Advisors, Inc | 0.00% | No change | 187,500 | $231K |
| Millennium Management | 0.00% | Reduce -23.2% | 164,091 | $202K |
| Sio Capital Management, LLC | 0.05% | No change | 163,679 | $201K |
| Geode Capital Management, LLC | 0.00% | Add +73.6% | 102,268 | $126K |
| Almitas Capital LLC | 0.02% | Reduce -63.1% | 86,808 | $107K |
| BlackRock, Inc. | 0.00% | Add +1.7% | 65,374 | $80K |
| Squarepoint Ops LLC | 0.00% | Add +175.9% | 50,771 | $62K |
| Bridgeway Capital Management, LLC | 0.00% | No change | 50,500 | $62K |
| Walleye Capital LLC | 0.00% | No change | 39,624 | $49K |
| XTX Topco Ltd | 0.00% | Reduce -27.4% | 29,081 | $36K |
| Qube Research & Technologies Ltd | 0.00% | Reduce -16.2% | 18,047 | $22K |
| State Street Corp. | 0.00% | No change | 15,962 | $20K |
| Morgan Stanley | 0.00% | Reduce -7.4% | 15,501 | $19K |
| Goldman Sachs Group Inc. | 0.00% | Reduce -79.7% | 14,299 | $18K |
| Acadian Asset Management LLC | 0.00% | No change | 13,753 | $16K |
| Abel Hall, LLC | 0.01% | Reduce -10.2% | 12,925 | $16K |
| Bank of America Corp. | 0.00% | Reduce -0.5% | 7,739 | $10K |
| Tower Research Capital LLC (TRC) | 0.00% | Reduce -57.3% | 2,593 | $3K |
| BNP Paribas Financial Markets | 0.00% | Reduce -82.3% | 349 | $429 |
| Optiver Holding B.V. | 0.00% | New | 168 | $207 |
| Barclays PLC | 0.00% | No change | 2 | $2 |
| UBS Group AG | 0.00% | Reduce -92.3% | 1 | $1 |
| Cwm, LLC | 0.00% | Reduce -97.3% | 15 | $0 |
"% of holder's portfolio" is BOLD's weight in each manager's 13F, not the share of Boundless Bio Inc. the manager owns.