Insiders who reported open-market trades in the last 12 months at the companies Brian S. Posner files at. Multiple unrelated insiders buying the same stock within a short window, cluster buying, has historically been one of the strongest Form 4 signals.
Jason P. Rhodes - $124.92M in DYN purchases and sales in the last 12 months
Dirk Kersten - $38.57M in DYN purchases and sales in the last 12 months
John Cox - $444K in DYN purchases and sales in the last 12 months
Douglas Kerr - $233K in DYN purchases and sales in the last 12 months
Erick Lucera - $229K in DYN purchases and sales in the last 12 months
Brian S. Posner is a corporate insider, tracked as Director of Dyne Therapeutics, Inc. (DYN). InsiderAlpha holds 14 primary Form 4 filings for them, the earliest from 2025, updated as new SEC EDGAR filings are processed.
How many SEC Form 4 filings has Brian S. Posner submitted recently?
1 primary Form 4 filing in the last 90 days, covering 1 company.
Has Brian S. Posner been buying or selling stock?
Recorded transactions: 9 open-market purchases ($332K) and 3 open-market sales ($145K) across all tracked filings.
Brian S. Posner is Director of Dyne Therapeutics, Inc. (DYN). 14 SEC Form 4 filings on record going back to 2025, most recently on 6 October 2026. Most recent open-market trade: bought $40K of DYN on 6 October 2026. Lifetime open-market purchases: $332K. Lifetime open-market sales: $145K.
Recent transactions
13
The latest 13 SEC Form 4 transactions reported by Brian S. Posner.
InsiderAlpha's records for Brian S. Posner go back to 2025: 14 primary Form 4 filings, an average of 7.0 per year. The typical open-market purchase is $37K (9 buys totaling $332K). The largest single buy on record is $45K of DYN in 2026. Sales side: 3 recorded sales totaling $145K, so the filing history runs buy-heavy by dollar value. No recorded transaction carries a Rule 10b5-1 plan flag. An absent flag does not establish whether a transaction was pre-arranged or discretionary.
