Feeds › Ownership stakes (13D / 13G)
Ownership stakes (13D / 13G)
Investors who own more than 5% of a company, from activists (13D) to passive holders (13G).
About this data
- What it is
- An investor who owns more than 5% of a public company must say so. Investors who may try to influence the company, such as activists, file the longer Schedule 13D; passive holders file the shorter Schedule 13G.
- Who files it
- The investor, within days of crossing 5%, and again whenever the stake changes materially.
- How current
- We collect new filings throughout the day on SEC business days.
- Worth knowing
- 13G filings are far more common than 13D. A 13D usually means the investor intends to push for changes, so it tends to get more attention.
All of this comes from public filings.
Source and freshness · Information, not investment advice (disclaimer).
Filings per day, last 30 days
13D (activist) 13G (passive)
Latest ownership filings
Showing: ticker DYN
| Filed | ScheduleBoth report a stake of more than 5%. A 13D is filed by investors who may try to influence the company, such as activists; a 13G by passive holders. | Company | Investor | Shares | % of shares | Filing |
|---|---|---|---|---|---|---|
| Aug 13, 2026 | SCHEDULE 13G/A (amended) | DYN Dyne Therapeutics, Inc. | Atlas Venture Associates Opportunity II, LLC | 1.34M | 0.7% | SCHEDULE 13G/A ↗ |
| Aug 13, 2026 | SCHEDULE 13G/A (amended) | DYN Dyne Therapeutics, Inc. | Atlas Venture Associates Opportunity II, L.P. | 1.34M | 0.7% | SCHEDULE 13G/A ↗ |
| Aug 13, 2026 | SCHEDULE 13G/A (amended) | DYN Dyne Therapeutics, Inc. | Atlas Venture Opportunity Fund II, L.P. | 1.34M | 0.7% | SCHEDULE 13G/A ↗ |
| Aug 13, 2026 | SCHEDULE 13G/A (amended) | DYN Dyne Therapeutics, Inc. | Atlas Venture Associates Opportunity I, LLC | 975,931 | 0.5% | SCHEDULE 13G/A ↗ |
| Aug 13, 2026 | SCHEDULE 13G/A (amended) | DYN Dyne Therapeutics, Inc. | Atlas Venture Associates Opportunity I, L.P. | 975,931 | 0.5% | SCHEDULE 13G/A ↗ |
| Aug 13, 2026 | SCHEDULE 13G/A (amended) | DYN Dyne Therapeutics, Inc. | Atlas Venture Opportunity Fund I, L.P. | 975,931 | 0.5% | SCHEDULE 13G/A ↗ |
| Aug 13, 2026 | SCHEDULE 13G/A (amended) | DYN Dyne Therapeutics, Inc. | Atlas Venture Associates XI, LLC | 4.48M | 2.4% | SCHEDULE 13G/A ↗ |
| Aug 13, 2026 | SCHEDULE 13G/A (amended) | DYN Dyne Therapeutics, Inc. | Atlas Venture Associates XI, L.P. | 4.48M | 2.4% | SCHEDULE 13G/A ↗ |
| Aug 13, 2026 | SCHEDULE 13G/A (amended) | DYN Dyne Therapeutics, Inc. | Atlas Venture Fund XI, L.P. | 4.48M | 2.4% | SCHEDULE 13G/A ↗ |
| Aug 13, 2026 | SCHEDULE 13G/A (amended) | DYN Dyne Therapeutics, Inc. | JANUS HENDERSON GROUP Ltd. | 12.00M | 7.3% | SCHEDULE 13G/A ↗ |
| Aug 6, 2026 | SCHEDULE 13G/A (amended) | DYN Dyne Therapeutics, Inc. | Abigail P. Johnson | 11.21M | 6.8% | SCHEDULE 13G/A ↗ |
| Aug 6, 2026 | SCHEDULE 13G/A (amended) | DYN Dyne Therapeutics, Inc. | FMR LLC | 11.21M | 6.8% | SCHEDULE 13G/A ↗ |
| Jul 28, 2026 | SCHEDULE 13G/A (amended) | DYN Dyne Therapeutics, Inc. | BlackRock, Inc. | 11.49M | 7.0% | SCHEDULE 13G/A ↗ |
| May 15, 2026 | SCHEDULE 13G/A (amended) | DYN Dyne Therapeutics, Inc. | T. Rowe Price Investment Management, Inc. | 30.79M | 18.7% | SCHEDULE 13G/A ↗ |
| May 15, 2026 | SCHEDULE 13G/A (amended) | DYN Dyne Therapeutics, Inc. | Janus Henderson Group PLC | 13.65M | 8.3% | SCHEDULE 13G/A ↗ |
| May 6, 2026 | SCHEDULE 13G | DYN Dyne Therapeutics, Inc. | Abigail P. Johnson | 8.91M | 5.4% | SCHEDULE 13G ↗ |
| May 6, 2026 | SCHEDULE 13G | DYN Dyne Therapeutics, Inc. | FMR LLC | 8.91M | 5.4% | SCHEDULE 13G ↗ |
| Mar 26, 2026 | SCHEDULE 13G/A (amended) | DYN Dyne Therapeutics, Inc. | The Vanguard Group | 0 | 0.0% | SCHEDULE 13G/A ↗ |
| Mar 6, 2026 | SCHEDULE 13G/A (amended) | DYN Dyne Therapeutics, Inc. | T. Rowe Price Investment Management, Inc. | 26.58M | 16.2% | SCHEDULE 13G/A ↗ |
| Feb 17, 2026 | SCHEDULE 13G/A (amended) | DYN Dyne Therapeutics, Inc. | Janus Henderson Group PLC | 13.89M | 8.5% | SCHEDULE 13G/A ↗ |
| Jan 8, 2026 | SCHEDULE 13G | DYN Dyne Therapeutics, Inc. | T. Rowe Price Investment Management, Inc. | 17.54M | 10.7% | SCHEDULE 13G ↗ |
| Nov 14, 2025 | SCHEDULE 13G/A (amended) | DYN Dyne Therapeutics, Inc. | Janus Henderson Group PLC | 14.75M | 10.4% | SCHEDULE 13G/A ↗ |
| Nov 14, 2025 | SCHEDULE 13G/A (amended) | DYN Dyne Therapeutics, Inc. | RA Capital Healthcare Fund, L.P. | 0 | 0.0% | SCHEDULE 13G/A ↗ |
| Nov 14, 2025 | SCHEDULE 13G/A (amended) | DYN Dyne Therapeutics, Inc. | Rajeev Shah | 0 | 0.0% | SCHEDULE 13G/A ↗ |
| Nov 14, 2025 | SCHEDULE 13G/A (amended) | DYN Dyne Therapeutics, Inc. | Peter Kolchinsky | 0 | 0.0% | SCHEDULE 13G/A ↗ |
| Nov 14, 2025 | SCHEDULE 13G/A (amended) | DYN Dyne Therapeutics, Inc. | RA Capital Management, L.P. | 0 | 0.0% | SCHEDULE 13G/A ↗ |
| Nov 13, 2025 | SCHEDULE 13G/A (amended) | DYN Dyne Therapeutics, Inc. | Atlas Venture Associates Opportunity II, LLC | 1.96M | 1.4% | SCHEDULE 13G/A ↗ |
| Nov 13, 2025 | SCHEDULE 13G/A (amended) | DYN Dyne Therapeutics, Inc. | Atlas Venture Associates Opportunity II, LP | 1.96M | 1.4% | SCHEDULE 13G/A ↗ |
| Nov 13, 2025 | SCHEDULE 13G/A (amended) | DYN Dyne Therapeutics, Inc. | Atlas Venture Opportunity Fund II, L.P. | 1.96M | 1.4% | SCHEDULE 13G/A ↗ |
| Nov 13, 2025 | SCHEDULE 13G/A (amended) | DYN Dyne Therapeutics, Inc. | Atlas Venture Associates Opportunity I, LLC | 1.46M | 1.0% | SCHEDULE 13G/A ↗ |
| Nov 13, 2025 | SCHEDULE 13G/A (amended) | DYN Dyne Therapeutics, Inc. | Atlas Venture Associates Opportunity I, L.P. | 1.46M | 1.0% | SCHEDULE 13G/A ↗ |
| Nov 13, 2025 | SCHEDULE 13G/A (amended) | DYN Dyne Therapeutics, Inc. | Atlas Venture Opportunity Fund I, L.P. | 1.46M | 1.0% | SCHEDULE 13G/A ↗ |
| Nov 13, 2025 | SCHEDULE 13G/A (amended) | DYN Dyne Therapeutics, Inc. | Atlas Venture Associates XI, LLC | 5.71M | 4.0% | SCHEDULE 13G/A ↗ |
| Nov 13, 2025 | SCHEDULE 13G/A (amended) | DYN Dyne Therapeutics, Inc. | Atlas Venture Associates XI, L.P. | 5.71M | 4.0% | SCHEDULE 13G/A ↗ |
| Nov 13, 2025 | SCHEDULE 13G/A (amended) | DYN Dyne Therapeutics, Inc. | Atlas Venture Fund XI, L.P. | 5.70M | 4.0% | SCHEDULE 13G/A ↗ |
| Aug 7, 2025 | SCHEDULE 13G/A (amended) | DYN Dyne Therapeutics, Inc. | Janus Henderson Group PLC | 14.39M | 10.1% | SCHEDULE 13G/A ↗ |
| May 15, 2025 | SCHEDULE 13G/A (amended) | DYN Dyne Therapeutics, Inc. | RA Capital Healthcare Fund, L.P. | 9.71M | 8.5% | SCHEDULE 13G/A ↗ |
| May 15, 2025 | SCHEDULE 13G/A (amended) | DYN Dyne Therapeutics, Inc. | Rajeev Shah | 9.71M | 8.5% | SCHEDULE 13G/A ↗ |
| May 15, 2025 | SCHEDULE 13G/A (amended) | DYN Dyne Therapeutics, Inc. | Peter Kolchinsky | 9.71M | 8.5% | SCHEDULE 13G/A ↗ |
| May 15, 2025 | SCHEDULE 13G/A (amended) | DYN Dyne Therapeutics, Inc. | RA Capital Management, L.P. | 9.71M | 8.5% | SCHEDULE 13G/A ↗ |
| May 15, 2025 | SCHEDULE 13G/A (amended) | DYN Dyne Therapeutics, Inc. | Forbion Growth II Management B.V. | 1.43M | 1.3% | SCHEDULE 13G/A ↗ |
| May 15, 2025 | SCHEDULE 13G/A (amended) | DYN Dyne Therapeutics, Inc. | Forbion Growth Opportunities Fund II Cooperatief U.A. | 1.43M | 1.3% | SCHEDULE 13G/A ↗ |
| May 15, 2025 | SCHEDULE 13G/A (amended) | DYN Dyne Therapeutics, Inc. | Forbion IV Management B.V. | 4.04M | 3.6% | SCHEDULE 13G/A ↗ |
| May 15, 2025 | SCHEDULE 13G/A (amended) | DYN Dyne Therapeutics, Inc. | Forbion Capital Fund IV Cooperatief U.A. | 4.04M | 3.6% | SCHEDULE 13G/A ↗ |
| May 15, 2025 | SCHEDULE 13G/A (amended) | DYN Dyne Therapeutics, Inc. | ForDyne B.V. | 5.40M | 4.8% | SCHEDULE 13G/A ↗ |
| May 15, 2025 | SCHEDULE 13G/A (amended) | DYN Dyne Therapeutics, Inc. | Roderick Wong, M.D. | 1.69M | 1.5% | SCHEDULE 13G/A ↗ |
| May 15, 2025 | SCHEDULE 13G/A (amended) | DYN Dyne Therapeutics, Inc. | RTW Investments, LP | 1.69M | 1.5% | SCHEDULE 13G/A ↗ |
| May 15, 2025 | SCHEDULE 13G/A (amended) | DYN Dyne Therapeutics, Inc. | Steven A. Cohen | 1.67M | 1.5% | SCHEDULE 13G/A ↗ |
| May 15, 2025 | SCHEDULE 13G/A (amended) | DYN Dyne Therapeutics, Inc. | Point72 Capital Advisors, Inc. | 1.67M | 1.5% | SCHEDULE 13G/A ↗ |
| May 15, 2025 | SCHEDULE 13G/A (amended) | DYN Dyne Therapeutics, Inc. | Point72 Asset Management, L.P. | 1.67M | 1.5% | SCHEDULE 13G/A ↗ |
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