BOLD · Boundless Bio, Inc.
$2.48
+0.01 (+0.40%)
At close · Jul 29
Market Cap
$55.49M
Shares
22.46M
Institutional ownership from SEC Form 13F filings. Investment managers with more than $100 million in U.S. equities must disclose their positions every quarter, within 45 days of quarter-end, so the holdings shown can lag the market by up to a quarter.
The Jun 30, 2026 filing window is
still open — showing the latest known positions. Funds that have not filed yet
carry their prior-quarter positions; a fund that filed without this stock counts
as sold out.
Holders: 38
Total Value: $9,376,649
Total Shares: 8,502,726
Institutional Ownership Trend
10 quarters
Holder Concentration
Across 36 13F filersTop Holder
31.8%
of institutional value
Top 5
69.7%
of institutional value
Top 10
89.0%
of institutional value
HHI
1,522
Moderately concentrated
| Holder | Value (USD) | % of 13F | Shares | Type | Discretion | Filed | Open | |||
|---|---|---|---|---|---|---|---|---|---|---|
| Mega FMR LLC | $2,965,000 | 31.62% | 2,695,455 | Shares | Defined | 2026-05-15 | ||||
| Mega CITADEL ADVISORS LLC | $1,476,343 | 15.74% | 1,342,131 | Shares | Defined | 2026-05-15 | ||||
| Small SECTORAL ASSET MANAGEMENT INC | $746,431 | 7.96% | 678,574 | Shares | Sole | 2026-05-15 | ||||
| Small Stonepine Capital Management, LLC | $657,450 | 7.01% | 597,682 | Shares | Sole | 2026-05-14 | ||||
| Mega VANGUARD CAPITAL MANAGEMENT LLC | $656,911 | 7.01% | 597,192 | Shares | Defined | 2026-05-15 | ||||
| Mega WELLINGTON MANAGEMENT GROUP LLP | $611,856 | 6.53% | 556,233 | Shares | Defined | 2026-05-15 | ||||
| Large RENAISSANCE TECHNOLOGIES LLC | $438,900 | 4.68% | 399,000 | Shares | Sole | 2026-05-14 | ||||
| Large Alyeska Investment Group, L.P. | $330,000 | 3.52% | 300,000 | Shares | Sole | 2026-05-15 | ||||
| Mid RBF Capital, LLC | $220,000 | 2.35% | 200,000 | Shares | Sole | 2026-05-18 | ||||
| Large Ensign Peak Advisors, Inc | $206,250 | 2.20% | 187,500 | Shares | Sole | 2026-05-13 | ||||
| Small Sio Capital Management, LLC | $180,046 | 1.92% | 163,679 | Shares | Sole | 2026-05-14 | ||||
| Mega GEODE CAPITAL MANAGEMENT, LLC | $140,333 | 1.50% | 127,576 | Shares | Defined | 2026-05-15 | ||||
| Mega MILLENNIUM MANAGEMENT LLC | $109,862 | 1.17% | 99,875 | Shares | Sole | 2026-05-15 | ||||
| Mid GSA CAPITAL PARTNERS LLP | $106,506 | 1.14% | 96,824 | Shares | Sole | 2026-05-08 | ||||
| Mid LANDSCAPE CAPITAL MANAGEMENT, L.L.C. | $94,370 | 1.01% | 85,792 | Shares | Sole | 2026-05-12 | ||||
| Mega BlackRock, Inc. | $77,741 | 0.83% | 70,675 | Shares | Sole | 2026-05-13 | ||||
| Mega VANGUARD FIDUCIARY TRUST CO Bank | $71,649 | 0.76% | 65,136 | Shares | Defined | 2026-05-08 | ||||
| Mid BRIDGEWAY CAPITAL MANAGEMENT, LLC | $55,550 | 0.59% | 50,500 | Shares | Sole | 2026-05-15 | ||||
| Large Walleye Capital LLC | $43,586 | 0.46% | 39,624 | Shares | Sole | 2026-05-13 | ||||
| Mid China Universal Asset Management Co., Ltd. | $42,250 | 0.45% | 16,900 | Shares | Sole | 2026-07-24 | ||||
| Mid XTX Topco Ltd | $38,138 | 0.41% | 34,671 | Shares | Defined | 2026-05-15 | ||||
| Large Qube Research & Technologies Ltd | $19,241 | 0.21% | 17,492 | Shares | Sole | 2026-05-15 | ||||
| Large Squarepoint Ops LLC | $18,011 | 0.19% | 16,374 | Shares | Defined | 2026-05-15 | ||||
| Mega STATE STREET CORP | $17,558 | 0.19% | 15,962 | Shares | Defined | 2026-05-15 | ||||
| Mega MORGAN STANLEY | $14,300 | 0.15% | 13,000 | Shares | Defined | 2026-05-15 | ||||
| Large ACADIAN ASSET MANAGEMENT LLC | $13,871 | 0.15% | 12,610 | Shares | Defined | 2026-05-13 | ||||
| Mid Pure Financial Advisors, LLC | $11,110 | 0.12% | 10,100 | Shares | Sole | 2026-04-10 | ||||
| Mega CITIGROUP INC | $9,720 | 0.10% | 8,837 | Shares | Defined | 2026-05-11 | ||||
| Mid Tower Research Capital LLC (TRC) | $2,608 | 0.03% | 2,371 | Shares | Defined | 2026-05-15 | ||||
| Mega Vanguard Global Advisers, LLC | $471 | 0.01% | 429 | Shares | Defined | 2026-05-08 | ||||
| Mega BNP PARIBAS ARBITRAGE, SA | $195 | 0.00% | 178 | Shares | Defined | 2026-05-12 | ||||
| Mega JPMORGAN CHASE & CO | $185 | 0.00% | 169 | Shares | Defined | 2026-05-13 | ||||
| Mid Optiver Holding B.V. | $184 | 0.00% | 168 | Shares | Defined | 2026-05-15 | ||||
| Large CWM, LLC | $8 | 0.00% | 8 | Shares | Sole | 2026-05-14 | ||||
| Small Financial Management Professionals, Inc. | $5 | 0.00% | 2 | Shares | Sole | 2026-07-09 | ||||
| Mid SBI Securities Co., Ltd. Broker-Dealer | $5 | 0.00% | 2 | Shares | Defined | 2026-07-23 | ||||
| Small Caitong International Asset Management Co., Ltd | $3 | 0.00% | 3 | Shares | Sole | 2026-05-11 | ||||
| Mega UBS Group AG | $2 | 0.00% | 2 | Shares | Defined | 2026-05-05 | ||||
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