Companies / Dyne Therapeutics, Inc.
Dyne Therapeutics, Inc.
Nasdaq: DYNCIK 1818794WALTHAM, MA
Insider flow · last 90 daysNet buys $156.8K
Financials
Ownership
186.7M shares outstanding · as of Jul 24, 2026
Ownership
| Insiders | 2.95% | 5,500,318 |
| 10%+ / strategic | 14.23% | 26,578,437 |
| Institutions | 85.89% | 160,392,383 |
| Public float | 0.00% | 0 |
Reported holdings exceed shares outstanding — public float shown as 0; some positions may overlap or lag.
% of common shares outstanding (exact, from the latest cover-page filing). Institutions are quarterly 13F snapshots; insiders reflect current officers & directors.
Insiders 8
View all →| Insider | % of shares | Shares |
|---|---|---|
Kersten DirkDirector | 2.49% | 4,644,386 |
Cox JohnCEOCEO & President · Director | 0.20% | 374,145 |
Kerr DouglasChief Medical Officer | 0.09% | 171,606 |
Friedl-Naderer JohannaChief Commercial Officer | 0.08% | 154,581 |
Lucera ErickChief Financial Officer | 0.07% | 131,100 |
Posner Brian SDirector | 0.01% | 24,500 |
Greene Barry EDirector | — | — |
Hurwitz EdwardDirector | — | — |
Institutional holders 241
View all →| Holder | Value | % of shares |
|---|---|---|
| $275.50M | 6.64% | |
| $247.43M | 7.31% | |
| $219.38M | 6.01% | |
| $178.59M | 4.89% | |
| $165.65M | 3.99% | |
| $128.51M | 3.52% | |
| $106.85M | 2.93% | |
| $93.93M | 2.57% | |
| $90.27M | 2.47% | |
| $84.65M | 2.50% |
Activity
Jun 30, 2026View all →
InsidersInstitutions
Who's accumulating and trimming this stock (13F).| Date | Actor | Action | Security | Value | Shares Δ | Position after | Impact |
|---|---|---|---|---|---|---|---|
| Q1 2026 as of | Adage Capital Partners Gp, L.L.C. 13F manager | Trim | Common stock | $-75.64M | -4.2M -80.67% | 1,000,000 0.54% of shares | high |
| Q2 2026 as of | BlackRock, Inc. 13F manager | Add | Common stock | $26.95M | +1.2M +10.84% | 12,404,330 6.64% of shares | medium |
| Q1 2026 as of | Perceptive Advisors LLC 13F manager | Add | Common stock | $21.57M | +1.2M +34.20% | 4,668,839 2.50% of shares | medium |
| Q2 2026 as of | Fiera Capital Corp 13F manager | New | Common stock | $17.55M | +790K | 789,989 0.42% of shares | medium |
| Q2 2026 as of | State Street Corporation 13F manager | Add | Common stock | $17.00M | +766K +11.44% | 7,458,263 3.99% of shares | medium |
| Q1 2026 as of | Millennium Management LLC 13F manager | Trim | Common stock | $-13.52M | -746K -82.47% | 158,548 0.08% of shares | medium |
| Q1 2026 as of | Orbimed Advisors LLC 13F manager | Add | Common stock | $12.98M | +716K +32.50% | 2,917,884 1.56% of shares | medium |
| Q1 2026 as of | Marshall Wace, LLP 13F manager | Trim | Common stock | $-10.77M | -594K -87.72% | 83,147 0.04% of shares | medium |
5%+ ownership events
Schedule 13D / 13G
| Filer | Stance | % of class |
|---|---|---|
| Vanguard Group Inc | Passive13G/A | — |
| Janus Henderson Group PLC | Passive13G/A | — |
| T. Rowe Price Investment Management, Inc. | Passive13G/A | — |
| T. Rowe Price Investment Management, Inc. | Passive13G | — |
| Janus Henderson Group PLC | Passive13G/A | — |
Securities
via CUSIP / OpenFIGI
| Symbol | Type | CUSIP |
|---|---|---|
| DYN | — | 26818M108 |