Trade Summary

5 days ago, Posner Brian S, serving as Dir at Dyne Therapeutics, Inc. (DYN), purchased 2,500 shares at $17.12 per share, for a total transaction value of $42,800.00. Following this transaction, Posner Brian S now holds 18,000 shares of DYN.

This purchase represents a 16.00% increase in Posner Brian S's stake in the company. This is considered a high-conviction trade given the significant change in ownership.

The trade was executed on Wednesday, May 20, 2026 and publicly disclosed via SEC Form 4 filing on Friday, May 22, 2026 at 4:10 PM ET, 2 days after the trade was made.

Dyne Therapeutics, Inc. operates in the HEALTHCARE sector, specifically within the BIOTECHNOLOGY industry. Insider buying activity in this sector can provide valuable signals about industry trends and company-specific developments.