Company · Ownership research

Dyne Therapeutics, Inc. DYN

CIK 0001818794

Form 4 transactions dated Sep 1, 2023 to Sep 23, 2026, as reported to the SEC.

Insider trading Initial holdings Institutional holders

This page lists 30 of 61 rows; the complete set is available through the API.

Insider filings on file run through 2026-09-08.

Insider purchases & sales

Purchased: $32.24M
Sold: $399.36M

Sep 1, 2023 – Sep 8, 2026
Available records · partial months are marked ·

202610 of 30 preview events · 61 available in 2026

Date	Insider	Activity	Trade value (USD)	% of prior holding
2026-09-08	Friedl-Naderer Johanna Chief Commercial Officer	Sale10b5-1 footnote	$3.49K 185 shares sold	0.12% sold Direct holding	▾
2026-09-08	Kerr Douglas Chief Medical Officer	Sale10b5-1 footnote	$24.36K 1,290 shares sold	0.79% sold Direct holding	▾
2026-09-08	Cox John CEO & President · Director	Sale10b5-1 footnote	$106.82K 5,658 shares sold	1.56% sold Direct holding	▾
2026-09-04	Friedl-Naderer Johanna Chief Commercial Officer	Sale10b5-1 footnote	$21.91K 900 shares sold	0.58% sold Direct holding	▾
2026-09-04	Kerr Douglas Chief Medical Officer	Sale10b5-1 footnote	$91.19K 3,745 shares sold	2.23% sold Direct holding	▾
2026-08-14	Rhodes Jason P Director	Sale10b5-1 footnote	$54.01M 2,160,516 shares sold	Unavailable Indirect holding	▾
2026-08-13	Friedl-Naderer Johanna Chief Commercial Officer	Sale10b5-1 footnote	$5.94K 226 shares sold	0.15% sold Direct holding	▾
2026-08-13	Kerr Douglas Chief Medical Officer	Sale10b5-1 footnote	$40.89K 1,556 shares sold	0.92% sold Direct holding	▾
2026-08-13	Lucera Erick Chief Financial Officer	Sale10b5-1 footnote	$47.23K 1,797 shares sold	1.48% sold Direct holding	▾
2026-08-13	Rhodes Jason P Director	Sale10b5-1 footnote	$11.17M 426,412 shares sold	Unavailable Indirect holding	▾

Showing 30 / 61 record groups in 2026. The complete set is available through the API.

Dyne Therapeutics, Inc. · DYN

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The initial HTML of this page carries its exact data as script#research-data (JSON): values, units, scope, preview limits and SEC sources. Read it directly, no script or API key needed; script#research-access says what needs an account. For the year shown, this page lists 30 of 61 purchase / sale groups and 17 of 17 other groups; the totals and the monthly series cover the whole window.

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{"ticker":"DYN","transaction_code":["P","S"],"transaction_form_type":"4","page_size":20}

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Figures are as reported to the SEC and merged with later amendments where Akkru could match them. Preview limits apply to what is listed, not to the totals, which come from the complete reported data. Nothing is zero-filled: a missing quarter or month is shown as missing.

Non-cancelled, non-derivative purchase (P) and sale (S) rows dated inside the public window, as reported. Includes open-market and private transactions. Data after the latest filing is not asserted complete and is not zero-filled. A grouped event shares filing, transaction date, security, code, direction, ownership bucket and source. Derivative groups also match underlying security, exercise price, exercise/expiration dates and footnote references. Reported rows are retained; P/S price lots can be grouped. Post-transaction balances are never summed.