Dyne Therapeutics (DYN) insider buying

Healthcare · Biotechnology · Market cap $2.6B

3 open-market purchases of DYN by Dyne Therapeutics's executives and directors since July 2025, worth $996,180 in total, from SEC Form 4 filings.

The most recent: Brian S Posner, Director bought $40,000 on October 2, 2026.

The biggest buyer over the period is John Cox: 1 purchase, $911,000.

By year

YearPurchasesValue
20262$85,180
20251$911,000

Biggest buyers

InsiderBuysValue
John Cox
1$911,000
Brian S Posner
Director		2$85,180

Every purchase

Newest first. From SEC Form 4 filings. Insider buying across the market.

DateInsiderSharesPriceValueFiling
Oct 2, 2026 Brian S Posner
Director		 2,500$16.00$40,000 Form 4
Mar 6, 2026 Brian S Posner
 3,000$15.06$45,180 Form 4
Jul 14, 2025 John Cox
 100,000$9.11$911,000 Form 4
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Questions

Are Dyne Therapeutics insiders buying the stock?

3 open-market purchases of DYN by Dyne Therapeutics's executives and directors since July 2025, worth $996,180 in total, from SEC Form 4 filings. The most recent: Brian S Posner, Director bought $40,000 on October 2, 2026.

What counts as insider buying here?

Open-market purchases (Form 4 code P) by officers and directors. Option exercises, grants and purchases by 10% owners are left out.

From Dyne Therapeutics's annual reports filed with the SEC (XBRL data), standardised by Investingly. Information only, not investment advice.