CIK 0001818794 · Large accelerated filer
Dyne Therapeutics, Inc.
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- DYN
- Exchange
- Nasdaq
- Industry
- Pharmaceutical Preparations
- FY end
- Dec 31
- Incorporated
- DE
- Entity type
- operating
- EIN
- 364883909
- Phone
- (781) 786-8230
- Business address
- 1560 TRAPELO ROAD, WALTHAM, MA, 02451
- Open-market buys, last 90 days
- $40,000
- in 1 filing
- Open-market sales, last 90 days
- $247,777
- in 3 filings, $248K under 10b5-1 plans
Net −$207,777. Shares bought or sold at a price by officers, directors and 10% owners (Form 4 codes P and S). Grants, option exercises and tax withholding aren't counted.
Who's trading
90 days
Reading 100 more Form 4s from the SEC; this list fills in as they're read.
| Date | Insider | Transaction | Shares | Price | Value | Owned after |
|---|---|---|---|---|---|---|
| 2026-10-02 | Posner Brian S Director | Purchase | +2,500 | $16.00 | $40K | 27,000 |
| 2026-06-08 | Posner Brian S Director | Purchase | +2,000 | $16.94 | $34K | 24,500 |
| 2026-06-03 | Posner Brian S Director | Purchase | +2,500 | $17.48 | $44K | 22,500 |
| 2026-05-26 | Posner Brian S Director | Purchase | +2,000 | $18.21 | $36K | 20,000 |
| 2026-05-20 | Posner Brian S Director | Purchase | +2,500 | $17.12 | $43K | 18,000 |
| 2026-03-30 | Posner Brian S Director | Purchase | +2,000 | $17.08 | $34K | 15,500 |
| 2026-03-11 | Posner Brian S Director | Purchase | +2,000 | $19.35 | $39K | 13,500 |
| 2026-03-06 | Posner Brian S Director | Purchase | +3,000 | $15.06 | $45K | 11,500 |
| 2025-07-14 | Cox John CEO & President | Purchase | +100,000 | $9.11 | $911K | 242,179 |
| 2024-09-04 | Cox John CEO & President | Purchase | +800 | $32.57 | $26K | 800 |
| 2024-09-04 | Cox John CEO & President | Purchase | +7,200 | $33.09 | $238K | 8,000 |
| 2024-09-04 | Cox John CEO & President | Purchase | +800 | $32.57 | $26K | 800 |
| 2024-09-04 | Cox John CEO & President | Purchase | +7,200 | $33.09 | $238K | 8,000 |
| 2024-09-04 | Cox John CEO & President | Purchase | +800 | $32.57 | $26K | 800 |
| 2024-09-04 | Cox John CEO & President | Purchase | +7,200 | $33.09 | $238K | 8,000 |
| 2024-09-04 | Cox John CEO & President | Purchase | +800 | $32.57 | $26K | 800 |
| 2024-09-04 | Cox John CEO & President | Purchase | +7,200 | $33.09 | $238K | 8,000 |
| 2024-01-09 | Kersten Dirk Director | Purchase | +285,714 | $17.50 | $5.0M | 6,416,793 |
| 2024-01-09 | Kersten Dirk Director | Purchase | +1,428,571 | $17.50 | $25.0M | 1,428,571 |
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