Insider Profile · SEC Form 4 Activity · Trailing 90 Days
Posner Brian S
Over the trailing 90 days, Posner Brian S (Other at Dyne Therapeutics, Inc.) traded $250K of stock (net buying $64K) across 2 companies, per 8 SEC Form 4 transactions.
- Role
- Other
- Window
- Trailing 90 days · 8 transactions · CIK 1372455
- Net activity
- +$64K ($157K bought · $93K sold)
By Company (Trailing 90 Days)
Transactions (8)
| Date | Symbol | Type | Shares | Value | Description |
|---|---|---|---|---|---|
| 2026-06-08 | DYN | Buy | 2.0K | $34K | Open market or private purchase |
| 2026-06-05 | DYN | Buy | 35.2K | $0 | Grant, award or other acquisition |
| 2026-06-03 | DYN | Buy | 2.5K | $44K | Open market or private purchase |
| 2026-06-03 | ACGL | Sell | 3.0K | $59K | Open market or private sale |
| 2026-05-26 | DYN | Buy | 2.0K | $36K | Open market or private purchase |
| 2026-05-20 | DYN | Buy | 2.5K | $43K | Open market or private purchase |
| 2026-05-11 | ACGL | Sell | 2.0K | $34K | Open market or private sale |
| 2026-05-05 | ACGL | Buy | 2.1K | $0 | Grant, award or other acquisition |
Activity shown covers the trailing 90 days of SEC Form 4 filings. "Buy" and "sell" follow the SEC acquired/disposed codes and include compensation events (grants, option exercises, tax withholding) unless noted. Historical fact, not investment advice.
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