Dyne Therapeutics, Inc. (DYN) ownership: Top institutional holder: T. Rowe Price Investment Management, Inc. ($558.15M). Insider activity: Net Seller (4 buys, 16 sells). SEC EDGAR first-party data.
| Holder | Shares | Market Value | Reported |
|---|---|---|---|
| T. Rowe Price Investment Management, Inc. | 30785801.00 | $558.15M | 2026-03-31 |
| JANUS HENDERSON GROUP PLC | 13647376.00 | $247.43M | 2026-03-31 |
| VANGUARD GROUP INC | 11215565.00 | $219.38M | 2025-12-31 |
| BlackRock, Inc. | 11699870.00 | $212.12M | 2026-03-31 |
| Atlas Venture Life Science Advisors, LLC | 9130465.00 | $165.54M | 2026-03-31 |
| FMR LLC | 8908980.00 | $161.52M | 2026-03-31 |
| Orbis Allan Gray Ltd | 6762231.00 | $122.60M | 2026-03-31 |
| STATE STREET CORP | 6653746.00 | $120.63M | 2026-03-31 |
| Insider | Transaction | Value | Date |
|---|---|---|---|
| Sell | null | 2026-06-16 | |
| Sell | null | 2026-06-16 | |
| Sell | null | 2026-06-16 | |
| Sell | null | 2026-06-05 | |
| Sell | null | 2026-06-05 | |
| Sell | null | 2026-06-05 | |
| Sell | null | 2026-06-05 | |
| Sell | null | 2026-06-05 |
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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.