Boundless Bio, Inc. (BOLD) ownership: Top institutional holder: BlackRock Fund Advisors ($8.74M). Insider activity: Net Buyer (14 buys, 6 sells). SEC EDGAR first-party data.
| Holder | Shares | Market Value | Reported |
|---|---|---|---|
| BlackRock Fund Advisors | 478418.00 | $8.74M | 2016-12-31 |
| FMR LLC | 2695455.00 | $2.96M | 2026-03-31 |
| CITADEL ADVISORS LLC | 1342131.00 | $1.48M | 2026-03-31 |
| VANGUARD GROUP INC | 662757.00 | $795308.00 | 2025-12-31 |
| SECTORAL ASSET MANAGEMENT INC | 678574.00 | $746431.00 | 2026-03-31 |
| Stonepine Capital Management, LLC | 597682.00 | $657450.00 | 2026-03-31 |
| VANGUARD CAPITAL MANAGEMENT LLC | 597192.00 | $656911.00 | 2026-03-31 |
| WELLINGTON MANAGEMENT GROUP LLP | 556233.00 | $611856.00 | 2026-03-31 |
| Insider | Transaction | Value | Date |
|---|---|---|---|
| Buy | null | 2026-07-17 | |
| Buy | null | 2026-07-17 | |
| Buy | null | 2026-07-17 | |
| Buy | null | 2026-07-14 | |
| Buy | null | 2026-07-14 | |
| Buy | null | 2026-07-14 | |
| Buy | null | 2026-07-09 | |
| Buy | null | 2026-07-09 |
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Institutional data from SEC Form 13F. Insider data from SEC Form 4. Congressional data from STOCK Act disclosures. Not personalized investment advice.