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 | $10.5M |
| 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, 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 |
|---|---|---|---|---|---|
| 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 |
| JPMorgan Chase & Co | 179 | $439 | 0.00% | +10+5.9% | Added |
| BNP Paribas Arbitrage, SA | 176 | $440 | 0.00% | −2−1.1% | Reduced |
| Tower Research Capital LLC (TRC) | 348 | $870 | 0.00% | −2,023−85.3% | Reduced |
| Pure Financial Advisors, Inc. | 10,100 | $25.3K | 0.00% | 00.0% | Unchanged |
| Caitong International Asset Management Co., Ltd | 10,443 | $26.1K | 0.00% | +10,440+348,000.0% | Added |
| Morgan Stanley | 13,000 | $32.5K | 0.00% | 00.0% | Unchanged |
| State Street Corp | 15,962 | $39.9K | 0.00% | 00.0% | Unchanged |
| China Universal Asset Management Co., Ltd. | 16,900 | $42.3K | 0.00% | +16,900 | New |
| Qube Research & Technologies Ltd | 20,207 | $50.5K | 0.00% | +2,715+15.5% | Added |
| XTX Topco Ltd | 33,361 | $83.4K | 0.00% | −1,310−3.8% | Reduced |
| Northern Trust Corp | 34,824 | $87.1K | 0.00% | +34,824 | New |
| Superstring Capital Management LP | 55,356 | $138.4K | 0.09% | +55,356 | New |
| Jane Street Group, LLC | 64,323 | $160.8K | 0.00% | +64,323 | New |
| Vanguard Fiduciary Trust Co | 65,136 | $162.8K | 0.00% | 00.0% | Unchanged |
| Gsa Capital Partners LLP | 72,353 | $181.0K | 0.01% | −24,471−25.3% | Reduced |
| Rangeley Capital, LLC | 74,000 | $185.0K | 0.18% | +74,000 | New |
| Prelude Capital Management, LLC | 83,998 | $210.0K | 0.02% | +83,998 | New |
| BlackRock, Inc. | 88,495 | $221.2K | 0.00% | +17,820+25.2% | Added |
| HRT Financial LP | 116,288 | $290.0K | 0.00% | +116,288 | New |
| Geode Capital Management, LLC | 116,736 | $291.8K | 0.00% | −10,840−8.5% | Reduced |
| Bridgeway Capital Management, LLC | 128,000 | $320.0K | 0.01% | +77,500+153.5% | Added |
| Citadel Advisors LLC | 145,049 | $362.6K | 0.00% | −1,197,082−89.2% | Reduced |
| Acadian Asset Management LLC | 146,757 | $365.0K | 0.00% | +134,147+1,063.8% | Added |
| Stonepine Capital Management, LLC | 154,595 | $386.5K | 0.29% | −443,087−74.1% | Reduced |
| Ensign Peak Advisors, Inc | 159,835 | $399.6K | 0.00% | −27,665−14.8% | Reduced |
| RBF Capital, LLC | 200,000 | $500.0K | 0.02% | 00.0% | Unchanged |
| Affinity Asset Advisors, LLC | 250,000 | $625.0K | 0.03% | +250,000 | New |
| Alyeska Investment Group, L.P. | 300,000 | $750.0K | 0.00% | 00.0% | Unchanged |
| Renaissance Technologies LLC | 471,570 | $1.18M | 0.00% | +72,570+18.2% | Added |
| Millennium Management LLC | 478,639 | $1.20M | 0.00% | +378,764+379.2% | Added |
| Wellington Management Group LLP | 556,233 | $1.39M | 0.00% | 00.0% | Unchanged |
| Vanguard Capital Management LLC | 614,923 | $1.54M | 0.00% | +17,731+3.0% | Added |
| Cormorant Asset Management, LP | 1,000,000 | $2.50M | 0.13% | +1,000,000 | New |
| ADAR1 Capital Management, LLC | 1,968,216 | $4.92M | 0.23% | +1,968,216 | New |
| Tang Capital Management LLC | 2,559,875 | $6.40M | 0.29% | +2,559,875 | New |
| FMR LLC | 2,581,055 | $6.45M | 0.00% | −114,400−4.2% | Reduced |
| ARCH Venture Management, LLC | 2,694,095 | $6.74M | 0.61% | +2,694,095 | 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 |