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, Q2 2026
Institutional positions in Boundless Bio, Inc. as of Jun 30, 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
- 40
- +5 vs. Q1 2026
- Shares held
- 15.3M
- +6.82M (+80.3%) vs. Q1 2026
- Total value
- $38.3M
- +$28.9M (+309.8%) vs. Q1 2026
- New holders
- 13
- 10 more added
- Sold out
- 8
- 9 more reduced
1 institution that held it in Q1 2026 haven't filed for Q2 2026 yet. Not filing isn't selling, so they aren't counted as sold out or in the changes above.
Compare with Q1 2026: 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 | $10.8M |
| Q3 2025 | 35 | $11.9M |
| Q2 2025 | 44 | $9.88M |
| Q1 2025 | 54 | $419.0M |
| Q4 2024 | 55 | $37.6M |
| Q3 2024 | 55 | $46.1M |
| Q2 2024 | 47 | $53.5M |
| 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, Q2 2026
Shares, value and share of portfolio for each institution holding Boundless Bio, Inc.; share changes are against Q1 2026.
| Institution | Shares | Value | % of portfolio | Change in shares | Action |
|---|---|---|---|---|---|
| ARCH Venture Management, LLC | 2,694,095 | $6.74M | 0.61% | +2,694,095 | New |
| FMR LLC | 2,581,055 | $6.45M | 0.00% | −114,400−4.2% | Reduced |
| Tang Capital Management LLC | 2,559,875 | $6.40M | 0.29% | +2,559,875 | New |
| ADAR1 Capital Management, LLC | 1,968,216 | $4.92M | 0.23% | +1,968,216 | New |
| Cormorant Asset Management, LP | 1,000,000 | $2.50M | 0.13% | +1,000,000 | New |
| Vanguard Capital Management LLC | 614,923 | $1.54M | 0.00% | +17,731+3.0% | Added |
| Wellington Management Group LLP | 556,233 | $1.39M | 0.00% | 00.0% | Unchanged |
| Millennium Management LLC | 478,639 | $1.20M | 0.00% | +378,764+379.2% | Added |
| Renaissance Technologies LLC | 471,570 | $1.18M | 0.00% | +72,570+18.2% | Added |
| Alyeska Investment Group, L.P. | 300,000 | $750.0K | 0.00% | 00.0% | Unchanged |
| Affinity Asset Advisors, LLC | 250,000 | $625.0K | 0.03% | +250,000 | New |
| RBF Capital, LLC | 200,000 | $500.0K | 0.02% | 00.0% | Unchanged |
| Ensign Peak Advisors, Inc | 159,835 | $399.6K | 0.00% | −27,665−14.8% | Reduced |
| Stonepine Capital Management, LLC | 154,595 | $386.5K | 0.29% | −443,087−74.1% | Reduced |
| Acadian Asset Management LLC | 146,757 | $365.0K | 0.00% | +134,147+1,063.8% | Added |
| Citadel Advisors LLC | 145,049 | $362.6K | 0.00% | −1,197,082−89.2% | Reduced |
| Bridgeway Capital Management, LLC | 128,000 | $320.0K | 0.01% | +77,500+153.5% | Added |
| Geode Capital Management, LLC | 116,736 | $291.8K | 0.00% | −10,840−8.5% | Reduced |
| HRT Financial LP | 116,288 | $290.0K | 0.00% | +116,288 | New |
| BlackRock, Inc. | 88,495 | $221.2K | 0.00% | +17,820+25.2% | Added |
| Prelude Capital Management, LLC | 83,998 | $210.0K | 0.02% | +83,998 | New |
| Rangeley Capital, LLC | 74,000 | $185.0K | 0.17% | +74,000 | New |
| Gsa Capital Partners LLP | 72,353 | $181.0K | 0.01% | −24,471−25.3% | Reduced |
| Vanguard Fiduciary Trust Co | 65,136 | $162.8K | 0.00% | 00.0% | Unchanged |
| Jane Street Group, LLC | 64,323 | $160.8K | 0.00% | +64,323 | New |
| Superstring Capital Management LP | 55,356 | $138.4K | 0.09% | +55,356 | New |
| Northern Trust Corp | 34,824 | $87.1K | 0.00% | +34,824 | New |
| XTX Topco Ltd | 33,361 | $83.4K | 0.00% | −1,310−3.8% | Reduced |
| Qube Research & Technologies Ltd | 20,207 | $50.5K | 0.00% | +2,715+15.5% | Added |
| China Universal Asset Management Co., Ltd. | 16,900 | $42.3K | 0.00% | +16,900 | New |
| State Street Corp | 15,962 | $39.9K | 0.00% | 00.0% | Unchanged |
| Morgan Stanley | 13,000 | $32.5K | 0.00% | 00.0% | Unchanged |
| Caitong International Asset Management Co., Ltd | 10,443 | $26.1K | 0.00% | +10,440+348,000.0% | Added |
| Pure Financial Advisors, Inc. | 10,100 | $25.3K | 0.00% | 00.0% | Unchanged |
| Tower Research Capital LLC (TRC) | 348 | $870 | 0.00% | −2,023−85.3% | Reduced |
| BNP Paribas Arbitrage, SA | 176 | $440 | 0.00% | −2−1.1% | Reduced |
| JPMorgan Chase & Co | 179 | $439 | 0.00% | +10+5.9% | Added |
| UBS Group AG | 2 | $5 | 0.00% | 00.0% | Unchanged |
| SBI Securities Co., Ltd. | 2 | $5 | 0.00% | +1+100.0% | Added |
| Financial Management Professionals, Inc. | 2 | $5 | 0.00% | +2 | New |
| Sectoral Asset Management Inc | 0 | $0 | 0.00% | −678,574−100.0% | Sold out |
| Sio Capital Management, LLC | 0 | $0 | 0.00% | −163,679−100.0% | Sold out |
| Landscape Capital Management, L.L.C. | 0 | $0 | 0.00% | −85,792−100.0% | Sold out |
| Walleye Capital LLC | 0 | $0 | 0.00% | −39,624−100.0% | Sold out |
| Squarepoint Ops LLC | 0 | $0 | 0.00% | −16,374−100.0% | Sold out |
| Citigroup Inc | 0 | $0 | 0.00% | −8,837−100.0% | Sold out |
| Vanguard Global Advisers, LLC | 0 | $0 | 0.00% | −429−100.0% | Sold out |
| Optiver Holding B.V. | 0 | $0 | 0.00% | −168−100.0% | Sold out |
| CWM, LLC | – | – | – | – | Not filed |