Boundless Bio, Inc.
BOLD- Exchange
- Nasdaq
- Industry
- Pharmaceutical Preparations
- SEC CIK
- 0001782303
In the last 90 days, Boundless Bio, Inc. insiders filed 4 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.
Q2 2026 vs. Q1 2026
How the institutions holding Boundless Bio, Inc. changed between Q1 2026 and Q2 2026.
All holders in Q2 2026All holders in Q1 2026
| Measure | Q1 2026 | Of which not filed for Q2 2026 | Q2 2026 | Change |
|---|---|---|---|---|
| Holders | 36 | 1 | 40 | +5 |
| Shares | 8.49M | 8 | 15.3M | +6.82M (+80.3%) |
| Value | $9.33M | $9 | $38.3M | +$28.9M (+309.8%) |
1 institution that held it in Q1 2026 haven't filed for Q2 2026 yet. Not filing isn't selling, so the changes leave them out.
New holders (13)
Institutions that held Boundless Bio, Inc. at the end of Q2 2026 but not at the end of Q1 2026.
| Institution | Shares | Value | % of portfolio |
|---|---|---|---|
| ARCH Venture Management, LLC | 2,694,095 | $6.74M | 0.61% |
| Tang Capital Management LLC | 2,559,875 | $6.40M | 0.29% |
| ADAR1 Capital Management, LLC | 1,968,216 | $4.92M | 0.23% |
| Cormorant Asset Management, LP | 1,000,000 | $2.50M | 0.13% |
| Affinity Asset Advisors, LLC | 250,000 | $625.0K | 0.03% |
| HRT Financial LP | 116,288 | $290.0K | 0.00% |
| Prelude Capital Management, LLC | 83,998 | $210.0K | 0.02% |
| Rangeley Capital, LLC | 74,000 | $185.0K | 0.18% |
| Jane Street Group, LLC | 64,323 | $160.8K | 0.00% |
| Superstring Capital Management LP | 55,356 | $138.4K | 0.09% |
| Northern Trust Corp | 34,824 | $87.1K | 0.00% |
| China Universal Asset Management Co., Ltd. | 16,900 | $42.3K | 0.00% |
| Financial Management Professionals, Inc. | 2 | $5 | 0.00% |
Sold out (8)
Institutions that held Boundless Bio, Inc. at the end of Q1 2026 and filed for Q2 2026 without it.
| Institution | Shares, Q1 2026 | Value, Q1 2026 |
|---|---|---|
| Sectoral Asset Management Inc | 678,574 | $746.4K |
| Sio Capital Management, LLC | 163,679 | $180.0K |
| Landscape Capital Management, L.L.C. | 85,792 | $94.4K |
| Walleye Capital LLC | 39,624 | $43.6K |
| Squarepoint Ops LLC | 16,374 | $18.0K |
| Citigroup Inc | 8,837 | $9.72K |
| Vanguard Global Advisers, LLC | 429 | $472 |
| Optiver Holding B.V. | 168 | $185 |
Not filed for Q2 2026 yet (1)
Institutions that held Boundless Bio, Inc. at the end of Q1 2026 and haven't filed a 13F for Q2 2026. Not filing isn't selling, so they aren't counted as sold out.
| Institution | Shares, Q1 2026 | Value, Q1 2026 |
|---|---|---|
| CWM, LLC | 8 | $9 |