DYN John Cox sold Dyne Therapeutics, Inc. shares — SEC Form 4SELLDyne Therapeutics, Inc.

John Cox, CEO & President at Dyne Therapeutics, Inc. (DYN), sold 4,060 shares at $13.35 ($54K) on 2025-06-05, disclosed to the SEC on 2025-06-06.

SEC EDGAR Filing

0000950170-25-083071

View on SEC EDGAR

Trade context

Scheduled sale ($54k) by CEO & President under a pre-arranged 10b5-1 plan. Pre-set trade — not a discretionary signal on the stock.

Modest52/100

Nothing distinguishes this filing.

Opportunistic Sell

Trade Context

•Decreased holdings by 3%
•2nd largest sale, out of 9
•Stock down -53% in previous 6 months
•Part of a 10b5-1 trading plan
•Mid-Cap ($2B-$10B market cap)

Filing Info

Filed2025-06-06

Traded2025-06-05

Accession0000950170-25-083071

SourceSEC EDGAR (Historical)

Insider

NameJohn Cox

TitleCEO & President

PIT GradeInsiderC

Score—

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Ticker	Type	Filed	Value	7d Stock	Filing
DYN	SELL	2026-09-08	$107K	—	Filing →
DYN	SELL	2026-08-17	$131K	—

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DYN John Cox sold Dyne Therapeutics, Inc. shares — SEC Form 4SELLDyne Therapeutics, Inc.

Trade Context

Filing Info

Insider

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Trade Details

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