Dyne Therapeutics
DYN · NASDAQ
$16.27+$1.04 (+6.83%)TodayMarket closed ·
Prev close $15.23
Who owns DYN
Largest institutional holders, from their latest 13F filings
The 10 largest institutions hold 54.0% of DYN’s shares.
- T. Rowe Price Investment Management, Inc.16.6%
- Janus Henderson Investors6.4%
- Fidelity Management & Research Company LLC6.0%
- BlackRock Institutional Trust Company, N.A.5.7%
- Next 6 largest institutions19.4%
- All other shareholders46.0%
| Holder | Shares | % of shares |
|---|---|---|
| T. Rowe Price Investment Management, Inc. | 30.91M | 16.55% |
| Janus Henderson Investors | 12.00M | 6.42% |
| Fidelity Management & Research Company LLC | 11.21M | 6.00% |
| BlackRock Institutional Trust Company, N.A. | 10.58M | 5.66% |
| State Street Investment Management (US) | 7.46M | 3.99% |
| Orbis Investment Management Ltd. | 7.01M | 3.75% |
| Atlas Venture | 6.80M | 3.64% |
| Vanguard Capital Management, LLC | 6.31M | 3.38% |
| TCG Crossover Management, LLC | 4.62M | 2.47% |
| Vanguard Portfolio Management, LLC | 4.05M | 2.17% |
Largest mutual fund holders
| Holder | Shares | % of shares |
|---|---|---|
| T. Rowe Price Small Cap Stock Fund | 7.00M | 3.75% |
| Vanguard Total Stock Market Index Fund | 5.26M | 2.82% |
| T. Rowe Price Small Cap Value Fund | 4.60M | 2.46% |
| State Street SPDR S&P Biotech ETF | 4.37M | 2.34% |
| iShares Russell 2000 ETF | 3.90M | 2.09% |
Insider trades
Form 4 filings by officers, directors and large holders
Over the last 6 months, insiders bought $196.80K (5 trades) and sold $127.67M (93 trades) of DYN on the open market.
| Insider | Type | Shares | Value |
|---|---|---|---|
| Posner Brian S | Buy | 2.50K | $40.00K |
| Friedl-Naderer Johanna | Sale | 185 | $3.49K |
| Kerr Douglas | Sale | 1.29K | $24.36K |
| Cox John | Sale | 5.66K | $106.82K |
| Friedl-Naderer Johanna | Sale | 900 | $21.92K |
| Kerr Douglas | Sale | 3.75K | $91.19K |
| Rhodes Jason P | Sale | 322.46K | $8.06M |
| Rhodes Jason P | Sale | 478.38K | $11.96M |
| Rhodes Jason P | Sale | 1.36M | $33.99M |
| Friedl-Naderer Johanna | Sale | 226 | $5.94K |
Short interest
Settled Sep 30, 2026
- Shares short
- 25.98M
- Days to cover
- 9.01
- % of shares outstanding
- 13.91%
- Average daily volume
- 2.88M
- Change since last report
- +11.1%
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