Boundless Bio, Inc.
BOLD- Exchange
- Nasdaq
- Industry
- Pharmaceutical Preparations
- SEC CIK
- 0001782303
In the last 90 days, Boundless Bio, Inc. insiders filed 5 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, Q1 2026
Institutional positions in Boundless Bio, Inc. as of Mar 31, 2026. 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. Q4 2025
- Shares held
- 8.49M
- +367.6K (+4.5%) vs. Q4 2025
- Total value
- $9.33M
- −$407.7K (−4.2%) vs. Q4 2025
- New holders
- 7
- 6 more added
- Sold out
- 6
- 10 more reduced
1 institution that held it in Q4 2025 haven't filed for Q1 2026 yet. Not filing isn't selling, so they aren't counted as sold out or in the changes above.
Compare with Q4 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, Q1 2026
Shares, value and share of portfolio for each institution holding Boundless Bio, Inc.; share changes are against Q4 2025.
| Institution | Shares | Value | % of portfolio | Change in shares | Action |
|---|---|---|---|---|---|
| SBI Securities Co., Ltd. | 1 | $1 | 0.00% | +1 | New |
| UBS Group AG | 2 | $2 | 0.00% | −21−91.3% | Reduced |
| Caitong International Asset Management Co., Ltd | 3 | $3 | 0.00% | +3 | New |
| CWM, LLC | 8 | $9 | 0.00% | −1−11.1% | Reduced |
| JPMorgan Chase & Co | 169 | $183 | 0.00% | 00.0% | Unchanged |
| Optiver Holding B.V. | 168 | $185 | 0.00% | 00.0% | Unchanged |
| BNP Paribas Arbitrage, SA | 178 | $196 | 0.00% | +2+1.1% | Added |
| Vanguard Global Advisers, LLC | 429 | $472 | 0.00% | +429 | New |
| Tower Research Capital LLC (TRC) | 2,371 | $2.61K | 0.00% | −3,432−59.1% | Reduced |
| Citigroup Inc | 8,837 | $9.72K | 0.00% | −16,236−64.8% | Reduced |
| Pure Financial Advisors, Inc. | 10,100 | $11.1K | 0.00% | +10,100 | New |
| Acadian Asset Management LLC | 12,610 | $12.0K | 0.00% | 00.0% | Unchanged |
| Morgan Stanley | 13,000 | $14.3K | 0.00% | 00.0% | Unchanged |
| State Street Corp | 15,962 | $17.6K | 0.00% | 00.0% | Unchanged |
| Squarepoint Ops LLC | 16,374 | $18.0K | 0.00% | +16,374 | New |
| Qube Research & Technologies Ltd | 17,492 | $19.2K | 0.00% | −1,215−6.5% | Reduced |
| XTX Topco Ltd | 34,671 | $38.1K | 0.00% | −4,906−12.4% | Reduced |
| Walleye Capital LLC | 39,624 | $43.6K | 0.00% | 00.0% | Unchanged |
| Bridgeway Capital Management, LLC | 50,500 | $55.5K | 0.00% | 00.0% | Unchanged |
| Vanguard Fiduciary Trust Co | 65,136 | $71.7K | 0.00% | +65,136 | New |
| BlackRock, Inc. | 70,675 | $77.7K | 0.00% | +3,627+5.4% | Added |
| Landscape Capital Management, L.L.C. | 85,792 | $94.4K | 0.01% | −41,834−32.8% | Reduced |
| Gsa Capital Partners LLP | 96,824 | $107.0K | 0.01% | +34,348+55.0% | Added |
| Millennium Management LLC | 99,875 | $109.9K | 0.00% | −35,535−26.2% | Reduced |
| Geode Capital Management, LLC | 127,576 | $140.3K | 0.00% | +33,478+35.6% | Added |
| Sio Capital Management, LLC | 163,679 | $180.0K | 0.03% | 00.0% | Unchanged |
| Ensign Peak Advisors, Inc | 187,500 | $206.3K | 0.00% | 00.0% | Unchanged |
| RBF Capital, LLC | 200,000 | $220.0K | 0.01% | 00.0% | Unchanged |
| Alyeska Investment Group, L.P. | 300,000 | $330.0K | 0.00% | 00.0% | Unchanged |
| Renaissance Technologies LLC | 399,000 | $438.9K | 0.00% | +57,600+16.9% | Added |
| Wellington Management Group LLP | 556,233 | $611.9K | 0.00% | 00.0% | Unchanged |
| Vanguard Capital Management LLC | 597,192 | $656.9K | 0.00% | +597,192 | New |
| Stonepine Capital Management, LLC | 597,682 | $657.5K | 0.58% | −112,389−15.8% | Reduced |
| Sectoral Asset Management Inc | 678,574 | $746.4K | 0.62% | 00.0% | Unchanged |
| Citadel Advisors LLC | 1,342,131 | $1.48M | 0.00% | −11,773−0.9% | Reduced |
| FMR LLC | 2,695,455 | $2.96M | 0.00% | +11,433+0.4% | Added |
| Northern Trust Corp | 0 | $0 | 0.00% | −189,475−100.0% | Sold out |
| Jane Street Group, LLC | 0 | $0 | 0.00% | −13,323−100.0% | Sold out |
| Abel Hall, LLC | 0 | $0 | 0.00% | −12,865−100.0% | Sold out |
| Nolet Wealth Management, LLC | 0 | $0 | 0.00% | −11,323−100.0% | Sold out |
| Bank of America Corp | 0 | $0 | 0.00% | −7,758−100.0% | Sold out |
| Barclays PLC | 0 | $0 | 0.00% | −2−100.0% | Sold out |
| Vanguard Group Inc | – | – | – | – | Not filed |