BOUNDLESS BIO INC (BOLD)
Institutional ownership reported to the SEC as of Q2 2026, across 15 quarters.
Institutions report 15,120,280 shares against 22,747,985 outstanding. Shares only - option lines are excluded, which is why this can be compared with the company at all. The count comes from the cover page of the company's own most recent report, so it is dated when that was filed rather than at quarter end.
Options share is the part of reported value carried in derivative lines rather than shares. A high figure means institutions are expressing a view on this security without owning much of it.
Holders
| Filer | Value | Shares | Their book | Held | Change |
|---|---|---|---|---|---|
| ARCH Venture Management, LLC | $6.7M | 2,694,095 | 0.61% | new | NEW |
| FMR LLC | $6.5M | 2,581,055 | 0.00% | 10q | -4.2%-$286.0K |
| TANG CAPITAL MANAGEMENT LLC | $6.4M | 2,559,875 | 0.29% | new | NEW |
| ADAR1 Capital Management, LLC | $4.9M | 1,968,216 | 0.23% | new | NEW |
| Cormorant Asset Management, LP | $2.5M | 1,000,000 | 0.13% | new | NEW |
| VANGUARD CAPITAL MANAGEMENT LLC | $1.5M | 614,923 | 0.00% | 2q | +3.0%+$44.3K |
| WELLINGTON MANAGEMENT GROUP LLP | $1.4M | 556,233 | 0.00% | 10q | HELD |
| MILLENNIUM MANAGEMENT LLC | $1.2M | 478,639 | 0.00% | 5q | +379.2%+$946.9K |
| RENAISSANCE TECHNOLOGIES LLC | $1.2M | 471,570 | 0.00% | 6q | +18.2%+$181.4K |
| Stonepine Capital Management, LLC | $773.0K | 309,190 | 0.20% | 5q | -48.3%-$721.2K |
| Alyeska Investment Group, L.P. | $750.0K | 300,000 | 0.00% | 10q | HELD |
| Affinity Asset Advisors, LLC | $625.0K | 250,000 | 0.03% | new | NEW |
| RBF Capital, LLC | $500.0K | 200,000 | 0.02% | 5q | HELD |
| Ensign Peak Advisors, Inc | $399.6K | 159,835 | 0.00% | 10q | -57.4%-$537.9K |
| CITADEL ADVISORS LLC | $362.6K | 145,049 | 0.00% | 10q | -89.2%-$3.0M |
| BRIDGEWAY CAPITAL MANAGEMENT, LLC | $320.0K | 128,000 | 0.01% | 5q | +153.5%+$193.8K |
| GEODE CAPITAL MANAGEMENT, LLC | $291.8K | 116,736 | 0.00% | 9q | -8.5%-$27.1K |
| BlackRock, Inc. | $221.2K | 88,495 | 0.00% | 8q | +25.2%+$44.6K |
| PRELUDE CAPITAL MANAGEMENT, LLC | $210.0K | 83,998 | 0.02% | new | NEW |
| Rangeley Capital, LLC | $185.0K | 74,000 | 0.17% | new | NEW |
| VANGUARD FIDUCIARY TRUST CO | $162.8K | 65,136 | 0.00% | 2q | HELD |
| JANE STREET GROUP, LLC | $160.8K | 64,323 | 0.00% | new | NEW |
| SUPERSTRING CAPITAL MANAGEMENT LP | $138.4K | 55,356 | 0.09% | new | NEW |
| NORTHERN TRUST CORP | $87.1K | 34,824 | 0.00% | new | NEW |
| XTX Topco Ltd | $83.4K | 33,361 | 0.00% | 6q | -3.8%-$3.3K |
| Qube Research & Technologies Ltd | $50.5K | 20,207 | 0.00% | 5q | +15.5%+$6.8K |
| China Universal Asset Management Co., Ltd. | $42.2K | 16,900 | 0.00% | new | NEW |
| STATE STREET CORP | $39.9K | 15,962 | 0.00% | 9q | HELD |
| MORGAN STANLEY | $32.5K | 13,000 | 0.00% | 9q | HELD |
| Caitong International Asset Management Co., Ltd | $26.1K | 10,443 | 0.00% | 2q | +348000.0%+$26.1K |
| Pure Financial Advisors, LLC | $25.2K | 10,100 | 0.00% | 2q | HELD |
| Tower Research Capital LLC (TRC) | $870 | 348 | 0.00% | 9q | -85.3%-$5.1K |
| BNP PARIBAS FINANCIAL MARKETS | $440 | 176 | 0.00% | 9q | -1.1% |
| JPMORGAN CHASE & CO | $439 | 179 | 0.00% | 3q | +5.9% |
| ACADIAN ASSET MANAGEMENT LLC | $365 | 146,757 | 0.00% | 7q | +1063.8% |
| HRT FINANCIAL LP | $290 | 116,288 | 0.00% | new | NEW |
| GSA CAPITAL PARTNERS LLP | $181 | 72,353 | 0.01% | 3q | -25.3% |
| MERCER GLOBAL ADVISORS INC /ADV | $125 | 50 | 0.00% | new | NEW |
| Financial Management Professionals, Inc. | $5 | 2 | 0.00% | new | NEW |
| UBS Group AG | $5 | 2 | 0.00% | 9q | HELD |
| SBI Securities Co., Ltd. | $5 | 2 | 0.00% | 2q | +100.0% |
Five percent filings
Anyone crossing 5% of a company must say so within days - far sooner than the next quarterly holdings report. A 13D declares an intent to influence the company; a 13G is the passive version. See all activist filings →
| Filed | Form | Filer | % of class |
|---|---|---|---|
| 2026-08-14 | 13G/A | Citadel Securities Group LPwith 6 co-filers | 0.6% |
| 2026-08-14 | 13G | ADAR1 Capital Management, LLCwith 1 co-filers | 8.8% |
Quarter by quarter
Coverage begins with the quarter ending 2018-12-31. Earlier filings exist only as occasional late amendments, too sparse to describe a market, so they are not shown.
| Quarter | Holders | Value | Shares | New | Added | Trimmed | Options |
|---|---|---|---|---|---|---|---|
| Q2 2026 | 38 | $37.8M | 15,120,280 | 13 | 9 | 8 | 0.0% |
| Q1 2026 | 34 | $9.4M | 8,563,889 | 5 | 4 | 10 | 0.0% |
| Q4 2025 | 33 | $10.9M | 9,093,350 | 4 | 10 | 6 | 0.0% |
| Q3 2025 | 33 | $12.2M | 9,881,880 | 1 | 8 | 13 | 0.0% |
| Q2 2025 | 40 | $9.8M | 9,745,401 | 10 | 5 | 17 | 0.0% |
| Q1 2025 | 50 | $19.6M | 12,989,981 | 7 | 11 | 15 | 0.0% |
| Q4 2024 | 51 | $37.5M | 12,929,390 | 6 | 27 | 3 | 0.0% |
| Q3 2024 | 52 | $46.0M | 13,267,968 | 11 | 11 | 13 | 0.0% |
| Q2 2024 | 45 | $52.6M | 13,629,114 | 19 | 11 | 8 | 0.0% |
| Q1 2024 | 39 | $206.9M | 14,446,983 | 38 | 0 | 0 | 0.0% |
| Q4 2019 | 190 | $2.7B | 43,657,623 | 81 | 45 | 41 | 3.5% |
| Q3 2019 | 148 | $1.3B | 44,788,009 | 19 | 62 | 34 | 0.3% |
| Q2 2019 | 147 | $1.7B | 45,148,931 | 30 | 63 | 34 | 1.1% |
| Q1 2019 | 141 | $1.7B | 43,946,721 | 27 | 48 | 40 | 0.3% |
| Q4 2018 | 126 | $929.1M | 43,508,290 | 2 | 7 | 0 | 0.2% |