Boundless Bio, Inc. Common Stock (BOLD)
Who owns Boundless Bio, Inc. Common Stock (BOLD)? This page shows the largest institutions and funds, the ownership structure and the latest insider transactions. 73.1% of the shares are freely tradable; institutional investors hold 49.7%.
Ownership Structure
Largest Shareholders
Institutions
| Name | Stake (%) | Shares | Change (%) | Date |
|---|---|---|---|---|
| FMR Inc | 12.00 | 2,695,455 | +0.4 | 03/31/2026 |
| Citadel Advisors Llc | 5.97 | 1,342,131 | -0.9 | 03/31/2026 |
| Sectoral Asset Management Inc | 3.02 | 678,574 | +0.0 | 03/31/2026 |
| Vanguard Group Inc | 2.95 | 662,757 | +16.3 | 12/31/2025 |
| Stonepine Capital Management Llc | 2.66 | 597,682 | -15.8 | 03/31/2026 |
| Vanguard Capital Management, LLC | 2.66 | 597,192 | +0.0 | 03/31/2026 |
| Wellington Management Company LLP | 2.48 | 556,233 | +0.0 | 03/31/2026 |
Funds
| Name | Stake (%) | Shares | Change (%) | Date |
|---|---|---|---|---|
| Fidelity Growth Compy Commingled Pl S | 5.53 | 1,242,342 | +0.1 | 04/30/2026 |
| Fidelity Growth Company Fund | 4.01 | 900,270 | +0.0 | 04/30/2026 |
| Vanguard Total Stock Mkt Idx Inv | 1.98 | 445,181 | +0.0 | 04/30/2026 |
Largest reported positions according to regulatory filings; stake as a percentage of shares outstanding, change versus the previous filing. Source: fundamentals data.
Insider Transactions
| Date | Person | Role | Type | Shares | Price | Value |
|---|---|---|---|---|---|---|
| 21. Jul 2026 | Tang Kevin | 10% Owner | Buy | 2,975 | 2.44 | 7,259 |
| 20. Jul 2026 | Tang Kevin | 10% Owner | Buy | 1,623 | 2.44 | 3,960 |
| 17. Jul 2026 | Tang Kevin | 10% Owner | Buy | 265 | 2.44 | 647 |
| 16. Jul 2026 | Tang Kevin | 10% Owner | Buy | 18,491 | 2.44 | 45,118 |
| 15. Jul 2026 | Tang Kevin | 10% Owner | Buy | 1,600 | 2.44 | 3,904 |
| 14. Jul 2026 | Tang Kevin | 10% Owner | Buy | 43,878 | 2.43 | 106,624 |
| 13. Jul 2026 | Tang Kevin | 10% Owner | Buy | 48,211 | 2.42 | 116,671 |
| 10. Jul 2026 | Tang Kevin | 10% Owner | Buy | 43,367 | 2.43 | 105,382 |
| 9. Jul 2026 | Tang Kevin | 10% Owner | Buy | 7 | 2.48 | 17 |
| 8. Jul 2026 | Tang Kevin | 10% Owner | Buy | 14,338 | 2.46 | 35,271 |
| 7. Jul 2026 | Tang Kevin | 10% Owner | Buy | 15,810 | 2.48 | 39,209 |
| 6. Jul 2026 | Tang Kevin | 10% Owner | Buy | 27,062 | 2.49 | 67,384 |
Reportable transactions by officers and major shareholders from SEC Form 4 filings. "Other" includes things like stock grants and option exercises without a buy/sell character.
View all insider transactions →Data as of: July 31, 2026 · Source: fundamental data & SEC filings (annual and quarterly reports, 10-K/10-Q)
Note: pure fact-based analysis, not investment advice and not a solicitation to buy or sell. All figures without guarantee.