Posner Brian S Insider Trades & Stock Holdings

Director · Dyne Therapeutics, Inc. · Latest filing Oct 2, 2026

Posner Brian S, Director at Dyne Therapeutics, Inc. has 1 Form 4 trade on file since Oct 2, 2026. Open-market activity: 1 purchase ($40K) and 0 sales ($0), net +$40K. Latest filing: acquired 2.50K shares of $DYN on Oct 2, 2026 at $16.

Trades on file

1

Open-market bought

$40K

Open-market sold

$0

Net open-market

+$40K

Latest filing

Oct 2, 2026

All insider trades by Posner Brian S

Date	Ticker	Type	Shares	Price	Value	Owned after	ΔOwn	1W	1M	6M	Role	Filing	Story
Oct 2, 2026	$DYN	Buy (Open-market buy)	2.50K	$16	$40K			+9.5%			Director		—

"Buy" means shares acquired on the Form 4 (including grants and option exercises); "Sell" means shares disposed. 1W / 1M / 6M = how the stock moved after the trade.

Stocks Posner Brian S traded

• $DYN

Frequently asked questions

Has Posner Brian S been buying or selling stock?

Posner Brian S has 1 open-market purchase and 0 open-market sales on file, net +$40K. Grants, option exercises and tax withholding are listed separately because they are not open-market trades.

What was Posner Brian S's latest insider trade?

acquired 2.50K shares of $DYN on Oct 2, 2026 at $16.

Data comes from public SEC Form 4 and 13F filings and STOCK Act disclosures. Dates are the trade or filing date reported. This page is for research only and is not investment advice.