BOUNDLESS BIO INC (BOLD) Institutional Ownership Changes & 13F Activity
BOUNDLESS BIO INC (BOLD). Institutional ownership data tracks hedge funds, asset managers, and other institutional investors based on recent SEC Form 13F filings (Q2 2026). This page analyzes institutional buying and selling activity, new holdings, and sold-out positions in the latest reporting period. Notable filers include Arch Venture Management, Llc, Tang Capital Management Llc, Adar1 Capital Management, Llc, Citadel Advisors Llc, and Cormorant Asset Management, Lp.
| Institution | Type | Change in shares | Change Position % | Shares | Reported stock balance | Portfolio quarter | Filing date |
|---|---|---|---|---|---|---|---|
| Arch Venture Management, Llc | Buy | +2,694,095 | — | 2,694,095 | $6.74M | Q2 2026 | Aug 14, 2026 |
| Tang Capital Management Llc | Buy | +2,559,875 | — | 2,559,875 | $6.40M | Q2 2026 | Aug 14, 2026 |
| Adar1 Capital Management, Llc | Buy | +1,968,216 | — | 1,968,216 | $4.92M | Q2 2026 | Aug 14, 2026 |
| Citadel Advisors Llc | Sell | -1,197,082 | -89.2% | 145,049 | $362.62K | Q2 2026 | Aug 14, 2026 |
| Cormorant Asset Management, Lp | Buy | +1,000,000 | — | 1,000,000 | $2.50M | Q2 2026 | Aug 14, 2026 |
| Stonepine Capital Management, Llc | Sell | -443,087 | -74.1% | 154,595 | $386.49K | Q2 2026 | Aug 14, 2026 |
| Millennium Management Llc | Buy | +378,764 | +379.2% | 478,639 | $1.20M | Q2 2026 | Aug 14, 2026 |
| Hrt Financial Lp | Buy | +116,288 | — | 116,288 | $290.00K | Q2 2026 | Aug 14, 2026 |
| Prelude Capital Management, Llc | Buy | +83,998 | — | 83,998 | $210.00K | Q2 2026 | Aug 14, 2026 |
| Bridgeway Capital Management, Llc | Buy | +77,500 | +153.5% | 128,000 | $320.00K | Q2 2026 | Aug 14, 2026 |
| Rangeley Capital, Llc | Buy | +74,000 | — | 74,000 | $185.00K | Q2 2026 | Aug 14, 2026 |
| Jane Street Group, Llc | Buy | +64,323 | — | 64,323 | $160.81K | Q2 2026 | Aug 14, 2026 |
| Superstring Capital Management Lp | Buy | +55,356 | — | 55,356 | $138.39K | Q2 2026 | Aug 14, 2026 |
| Ensign Peak Advisors, Inc | Sell | -27,665 | -14.8% | 159,835 | $399.59K | Q2 2026 | Aug 14, 2026 |
| Qube Research & Technologies Ltd | Buy | +2,715 | +15.5% | 20,207 | $50.52K | Q2 2026 | Aug 14, 2026 |
| Xtx Topco Ltd | Sell | -1,310 | -3.8% | 33,361 | $83.40K | Q2 2026 | Aug 14, 2026 |
| Affinity Asset Advisors, Llc | Buy | +250,000 | — | 250,000 | $625.00K | Q2 2026 | Aug 13, 2026 |
| Acadian Asset Management Llc | Buy | +134,147 | +1063.8% | 146,757 | $365.00K | Q2 2026 | Aug 13, 2026 |
| Fmr Llc | Sell | -114,400 | -4.2% | 2,581,055 | $6.45M | Q2 2026 | Aug 13, 2026 |
| Renaissance Technologies LLC | Buy | +72,570 | +18.2% | 471,570 | $1.18M | Q2 2026 | Aug 13, 2026 |
| Northern Trust Corp | Buy | +34,824 | — | 34,824 | $87.06K | Q2 2026 | Aug 13, 2026 |
| Vanguard Capital Management Llc | Buy | +17,731 | +3.0% | 614,923 | $1.54M | Q2 2026 | Aug 13, 2026 |
| Bnp Paribas Financial Markets | Sell | -2 | -1.1% | 176 | $440.00 | Q2 2026 | Aug 13, 2026 |
| Geode Capital Management, Llc | Sell | -10,840 | -8.5% | 116,736 | $291.84K | Q2 2026 | Aug 12, 2026 |
| Jpmorgan Chase & Co | Buy | +179 | — | 179 | $439.00 | Q2 2026 | Aug 12, 2026 |
| Tower Research Capital Llc (Trc) | Sell | -2,023 | -85.3% | 348 | $870.00 | Q2 2026 | Aug 11, 2026 |
| Mercer Global Advisors Inc | Buy | +50 | — | 50 | $125.00 | Q2 2026 | Aug 11, 2026 |
| Blackrock, Inc. | Buy | +17,820 | +25.2% | 88,495 | $221.24K | Q2 2026 | Aug 07, 2026 |
| Gsa Capital Partners Llp | Sell | -24,471 | -25.3% | 72,353 | $181.00K | Q2 2026 | Aug 06, 2026 |
| Caitong International Asset Management Co., Ltd | Buy | +10,440 | +348000.0% | 10,443 | $26.11K | Q2 2026 | Aug 05, 2026 |
Frequently asked questions about BOLD activity
Which institutional owners are buying BOLD?
Institutional owners buying BOLD include investors who have either initiated new positions or increased their existing holdings based on recent SEC 13F filings. The activity table above highlights which funds added shares in the latest reporting periods and how their positions changed over time.
What does "buy" mean in BOLD activity?
"Buy" means an investor increased their reported position in BOLD compared to the prior reporting period. This reflects growing exposure to BOUNDLESS BIO INC (BOLD) rather than necessarily a brand-new position (though new positions also appear as buys when prior quantity was zero).
Is institutional interest in BOLD increasing?
Institutional interest in BOLD can be assessed by comparing the number of tracked funds adding or increasing positions versus those trimming or exiting across the periods shown. A higher number of additions typically signals increasing participation among large filers, but it should be read alongside position sizes and the full table.
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