Boundless Bio, Inc.
BOLD- Exchange
- Nasdaq
- Industry
- Pharmaceutical Preparations
- SEC CIK
- 0001782303
In the last 90 days, Boundless Bio, Inc. insiders filed 6 open-market purchases and 2 sales; 40 institutions reported holding it in 13F filings for Q2 2026, worth $38.3M in total; no superinvestor holds it.
13F holders, Q4 2025
Institutional positions in Boundless Bio, Inc. as of Dec 31, 2025. Investment managers with $100 million or more in US stocks report their long positions on Form 13F within 45 days after each quarter ends. How 13F works
- Institutional holders
- 36
- +1 vs. Q3 2025
- Shares held
- 8.78M
- −840.4K (−8.7%) vs. Q3 2025
- Total value
- $10.5M
- −$1.30M (−11.0%) vs. Q3 2025
- New holders
- 6
- 10 more added
- Sold out
- 5
- 9 more reduced
Compare with Q3 2025: new holders, sold out and not filed yet
Holders and value by quarter
Institutions reporting BOLD on Form 13F each quarter since Q1 2021, and the total value they reported. Values are as of each quarter end, so they also move with the share price.
| Quarter | Holders | Value |
|---|---|---|
| Q2 2026 | 40 | $38.3M |
| Q1 2026 | 36 | $9.33M |
| Q4 2025 | 36 | $10.5M |
| Q3 2025 | 35 | $11.8M |
| Q2 2025 | 44 | $9.88M |
| Q1 2025 | 54 | $19.6M |
| Q4 2024 | 55 | $37.6M |
| Q3 2024 | 55 | $46.1M |
| Q2 2024 | 47 | $53.4M |
| Q1 2024 | 43 | $208.8M |
| Q4 2023 | 0 | $0 |
| Q3 2023 | 0 | $0 |
| Q2 2023 | 0 | $0 |
| Q1 2023 | 0 | $0 |
| Q4 2022 | 0 | $0 |
| Q3 2022 | 0 | $0 |
| Q2 2022 | 0 | $0 |
| Q1 2022 | 0 | $0 |
| Q4 2021 | 0 | $0 |
| Q3 2021 | 0 | $0 |
| Q2 2021 | 0 | $0 |
| Q1 2021 | 0 | $0 |
Institutions, Q4 2025
Shares, value and share of portfolio for each institution holding Boundless Bio, Inc.; share changes are against Q3 2025.
| Institution | Shares | Value | % of portfolio | Change in shares | Action |
|---|---|---|---|---|---|
| FMR LLC | 2,684,022 | $3.22M | 0.00% | −414,049−13.4% | Reduced |
| Citadel Advisors LLC | 1,353,904 | $1.62M | 0.00% | +477,492+54.5% | Added |
| Stonepine Capital Management, LLC | 710,071 | $852.1K | 0.67% | +296,618+71.7% | Added |
| Sectoral Asset Management Inc | 678,574 | $814.3K | 0.65% | 00.0% | Unchanged |
| Vanguard Group Inc | 662,757 | $795.3K | 0.00% | +93,100+16.3% | Added |
| Wellington Management Group LLP | 556,233 | $667.5K | 0.00% | 00.0% | Unchanged |
| Renaissance Technologies LLC | 341,400 | $409.7K | 0.00% | +117,838+52.7% | Added |
| Alyeska Investment Group, L.P. | 300,000 | $360.0K | 0.00% | 00.0% | Unchanged |
| RBF Capital, LLC | 200,000 | $240.0K | 0.01% | 00.0% | Unchanged |
| Northern Trust Corp | 189,475 | $227.4K | 0.00% | −1,326−0.7% | Reduced |
| Ensign Peak Advisors, Inc | 187,500 | $225.0K | 0.00% | 00.0% | Unchanged |
| Sio Capital Management, LLC | 163,679 | $196.4K | 0.03% | 00.0% | Unchanged |
| Millennium Management LLC | 135,410 | $162.5K | 0.00% | −28,681−17.5% | Reduced |
| Landscape Capital Management, L.L.C. | 127,626 | $153.2K | 0.01% | +127,626 | New |
| Geode Capital Management, LLC | 94,098 | $112.9K | 0.00% | −8,170−8.0% | Reduced |
| BlackRock, Inc. | 67,048 | $80.5K | 0.00% | +1,674+2.6% | Added |
| Gsa Capital Partners LLP | 62,476 | $75.0K | 0.01% | +62,476 | New |
| Bridgeway Capital Management, LLC | 50,500 | $60.6K | 0.00% | 00.0% | Unchanged |
| Walleye Capital LLC | 39,624 | $47.5K | 0.00% | 00.0% | Unchanged |
| XTX Topco Ltd | 39,577 | $47.5K | 0.00% | +10,496+36.1% | Added |
| Citigroup Inc | 25,073 | $30.1K | 0.00% | +25,073 | New |
| Qube Research & Technologies Ltd | 18,707 | $22.4K | 0.00% | +660+3.7% | Added |
| State Street Corp | 15,962 | $19.2K | 0.00% | 00.0% | Unchanged |
| Jane Street Group, LLC | 13,323 | $16.0K | 0.00% | +13,323 | New |
| Morgan Stanley | 13,000 | $15.6K | 0.00% | −2,501−16.1% | Reduced |
| Abel Hall, LLC | 12,865 | $15.4K | 0.00% | −60−0.5% | Reduced |
| Acadian Asset Management LLC | 12,610 | $14.0K | 0.00% | −1,143−8.3% | Reduced |
| Nolet Wealth Management, LLC | 11,323 | $13.6K | 0.01% | +11,323 | New |
| Bank of America Corp | 7,758 | $9.31K | 0.00% | +19+0.2% | Added |
| Tower Research Capital LLC (TRC) | 5,803 | $6.96K | 0.00% | +3,210+123.8% | Added |
| BNP Paribas Arbitrage, SA | 176 | $211 | 0.00% | −173−49.6% | Reduced |
| JPMorgan Chase & Co | 169 | $203 | 0.00% | +169 | New |
| Optiver Holding B.V. | 168 | $202 | 0.00% | 00.0% | Unchanged |
| UBS Group AG | 23 | $27 | 0.00% | +22+2,200.0% | Added |
| Barclays PLC | 2 | $2 | 0.00% | 00.0% | Unchanged |
| CWM, LLC | 9 | $0 | 0.00% | −6−40.0% | Reduced |
| Nextech Invest, Ltd. | 0 | $0 | 0.00% | −1,228,069−100.0% | Sold out |
| Redmile Group, LLC | 0 | $0 | 0.00% | −245,458−100.0% | Sold out |
| Almitas Capital LLC | 0 | $0 | 0.00% | −86,808−100.0% | Sold out |
| Squarepoint Ops LLC | 0 | $0 | 0.00% | −50,771−100.0% | Sold out |
| Goldman Sachs Group Inc | 0 | $0 | 0.00% | −14,299−100.0% | Sold out |