Dyne Therapeutics, Inc.

Net sales of $65.1M over the last 3 months

1 seller account for the net balance. There is no cluster of three distinct buyers within 30 days. We found no CEO/CFO purchases over 12 months.

How to read this signal

Only open-market P purchases and S sales count toward the signal. Vesting, options, taxes and gifts remain in the source data but do not trigger alerts. Rule 10b5-1 trades are shown as informational.

JSON example

3-month balance

−$65,144,894

1 buyers · 1 sellers

12-month purchases

$314,840

1 distinct insiders

12-month sales

$167,668,261

2 distinct insiders

Highlighted alerts

93 Rule 10b5-1 trades treated as informational

Buying cluster · 30 days

Fewer than three distinct buyers

CEO/CFO purchases · 12 months

No executive purchases found

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Form 4 raw → Raspberry

The value is in what we do not call a signal.

The SEC XML stores every transaction. Raspberry keeps that evidence, reads the footnotes and separates voluntary open-market activity from vesting, option exercises, gifts, tax withholding, stock purchase and dividend reinvestment plans and pre-programmed 10b5-1 trades.

100

Raw transactions

Everything returned by the filing

100

Voluntary view

P/S trades after deterministic checks

Administrative noise

Stored, never alerted

10b5-1

Shown as informational

SEC ownership XML facts

Code: S
Shares: 185
Price: $18.88
Footnotes: 5

Represents shares automatically sold by the Reporting Person to satisfy tax withholding obligations in connection with the vesting of restricted stock units granted to the Reporting Person on September 3, 2024. The automatic sale of the Reporting Person's shares is provided for in a restricted stock unit agreement constituting a "binding contract" consistent with the affirmative defense to liability under Rule 10b5-1 and the sale does not represent a discretionary trade by the Reporting Person. The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices within the range of $24.29 to $24.50, inclusive. The Reporting Person undertakes to provide to the Issuer, any security holder of the Issuer or the staff of the Securities and Exchange Commission, upon request, full information regarding the number of shares sold at each separate price within the range set forth in this footnote of this Form 4. Represents shares automatically sold by the Reporting Person to satisfy tax withholding obligations in connection with the vesting of restricted stock units granted to the Reporting Person on December 4, 2024. The automatic sale of the Reporting Person's shares is provided for in a restricted stock unit agreement constituting a "binding contract" consistent with the affirmative defense to liability under Rule 10b5-1 and the sale does not represent a discretionary trade by the Reporting Person. The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices within the range of $18.77 to $18.92, inclusive. The Reporting Person undertakes to provide to the Issuer, any security holder of the Issuer or the staff of the Securities and Exchange Commission, upon request, full information regarding the number of shares sold at each separate price within the range set forth in this footnote of this Form 4. Includes 102,966 unvested RSUs.

Raspberry interpretation

Informational — no alert

Reason: tax_withholding. The filing footnotes identify tax withholding. The trade is reported under a Rule 10b5-1 plan.

Verify in SEC EDGAR

Recent transactions

Voluntary purchases and sales; administrative noise stays hidden.

100 transactions

Posner Brian S

Director

Oct 02, 2026

PurchaseAlert

Shares: 2,500
Price: $16.00
Value: $40,000

Date	Insider	Transaction	Shares	Price	Value	Reading
Oct 02, 2026	Posner Brian S Director	Purchase	2,500	$16.00	$40,000	Alert
Aug 14, 2026	Rhodes Jason P Director	Sale	322,465	$25.00	$8,061,625	10b5-1
Aug 14, 2026	Rhodes Jason P Director	Sale	478,377	$25.00	$11,959,425	10b5-1
Aug 14, 2026	Rhodes Jason P Director	Sale	1,359,674	$25.00	$33,991,850	10b5-1
Aug 13, 2026	Rhodes Jason P Director	Sale	63,643	$26.20	$1,667,447	10b5-1
Aug 13, 2026	Rhodes Jason P Director	Sale	94,415	$26.20	$2,473,673	10b5-1
Aug 13, 2026	Rhodes Jason P Director	Sale	268,354	$26.20	$7,030,875	10b5-1
Jul 27, 2026	Kersten Dirk Director	Sale	5,388	$26.04	$140,319	10b5-1
Jul 27, 2026	Kersten Dirk Director	Sale	256,072	$25.50	$6,530,451	10b5-1
Jul 07, 2026	Rhodes Jason P Director	Sale	5,000	$23.61	$118,050	10b5-1
Jul 07, 2026	Rhodes Jason P Director	Sale	11,665	$23.62	$275,527	10b5-1
Jul 07, 2026	Rhodes Jason P Director	Sale	49,193	$23.17	$1,139,802	10b5-1
Jul 07, 2026	Rhodes Jason P Director	Sale	14,844	$23.62	$350,615	10b5-1
Jul 07, 2026	Rhodes Jason P Director	Sale	62,543	$23.17	$1,449,121	10b5-1
Jul 07, 2026	Rhodes Jason P Director	Sale	29,587	$23.62	$698,845	10b5-1
Jul 07, 2026	Rhodes Jason P Director	Sale	124,379	$23.17	$2,881,861	10b5-1
Jul 06, 2026	Rhodes Jason P Director	Sale	100,019	$22.79	$2,279,433	10b5-1
Jul 06, 2026	Rhodes Jason P Director	Sale	127,182	$22.79	$2,898,478	10b5-1
Jul 06, 2026	Rhodes Jason P Director	Sale	253,039	$22.79	$5,766,759	10b5-1
Jun 29, 2026	Rhodes Jason P Director	Sale	40,702	$21.14	$860,440	10b5-1
Jun 29, 2026	Rhodes Jason P Director	Sale	51,756	$21.14	$1,094,122	10b5-1
Jun 29, 2026	Rhodes Jason P Director	Sale	102,969	$21.14	$2,176,765	10b5-1
Jun 26, 2026	Rhodes Jason P Director	Sale	64,411	$21.28	$1,370,666	10b5-1
Jun 26, 2026	Rhodes Jason P Director	Sale	81,903	$21.28	$1,742,896	10b5-1
Jun 26, 2026	Rhodes Jason P Director	Sale	162,954	$21.28	$3,467,661	10b5-1
Jun 25, 2026	Rhodes Jason P Director	Sale	5,019	$21.10	$105,901	10b5-1
Jun 25, 2026	Rhodes Jason P Director	Sale	6,382	$21.10	$134,660	10b5-1
Jun 25, 2026	Rhodes Jason P Director	Sale	12,699	$21.10	$267,949	10b5-1
Jun 24, 2026	Rhodes Jason P Director	Sale	19,973	$21.02	$419,832	10b5-1
Jun 24, 2026	Rhodes Jason P Director	Sale	25,397	$21.02	$533,845	10b5-1
Jun 24, 2026	Rhodes Jason P Director	Sale	50,530	$21.02	$1,062,141	10b5-1
Jun 23, 2026	Rhodes Jason P Director	Sale	30,774	$21.13	$650,255	10b5-1
Jun 23, 2026	Rhodes Jason P Director	Sale	39,131	$21.13	$826,838	10b5-1
Jun 23, 2026	Rhodes Jason P Director	Sale	77,855	$21.13	$1,645,076	10b5-1
Jun 23, 2026	Kersten Dirk Director	Sale	1,657	$21.47	$35,583	10b5-1
Jun 23, 2026	Kersten Dirk Director	Sale	71,629	$21.04	$1,506,766	10b5-1
Jun 22, 2026	Kersten Dirk Director	Sale	190,676	$20.57	$3,922,263	10b5-1
Jun 18, 2026	Kersten Dirk Director	Sale	46,901	$20.07	$941,373	10b5-1
Jun 17, 2026	Kersten Dirk Director	Sale	37,454	$20.14	$754,316	10b5-1
Jun 08, 2026	Posner Brian S Director	Purchase	2,000	$16.94	$33,880	Alert
Jun 03, 2026	Posner Brian S Director	Purchase	2,500	$17.48	$43,700	Alert
May 26, 2026	Posner Brian S Director	Purchase	2,000	$18.21	$36,420	Alert
May 20, 2026	Posner Brian S Director	Purchase	2,500	$17.12	$42,800	Alert
May 06, 2026	Rhodes Jason P Director	Sale	43,621	$18.18	$793,030	10b5-1
May 06, 2026	Rhodes Jason P Director	Sale	21,926	$18.18	$398,615	10b5-1
May 06, 2026	Rhodes Jason P Director	Sale	17,244	$18.18	$313,496	10b5-1
May 06, 2026	Rhodes Jason P Director	Sale	428	$18.18	$7,781	10b5-1
May 05, 2026	Rhodes Jason P Director	Sale	2,403	$18.03	$43,326	10b5-1
May 05, 2026	Rhodes Jason P Director	Sale	60	$18.03	$1,082	10b5-1
May 05, 2026	Rhodes Jason P Director	Sale	6,081	$18.03	$109,640	10b5-1
May 05, 2026	Rhodes Jason P Director	Sale	3,056	$18.03	$55,100	10b5-1
May 04, 2026	Rhodes Jason P Director	Sale	2,466	$18.00	$44,388	10b5-1
May 04, 2026	Rhodes Jason P Director	Sale	61	$18.00	$1,098	10b5-1
May 04, 2026	Rhodes Jason P Director	Sale	6,241	$18.00	$112,338	10b5-1
May 04, 2026	Rhodes Jason P Director	Sale	3,136	$18.00	$56,448	10b5-1
Apr 28, 2026	Rhodes Jason P Director	Sale	21	$19.00	$399.00	10b5-1
Apr 28, 2026	Rhodes Jason P Director	Sale	1	$19.00	$19.00	10b5-1
Apr 28, 2026	Rhodes Jason P Director	Sale	52	$19.00	$988.00	10b5-1
Apr 28, 2026	Rhodes Jason P Director	Sale	26	$19.00	$494.00	10b5-1
Apr 28, 2026	Rhodes Jason P Director	Sale	47,082	$18.38	$865,367	10b5-1
Apr 28, 2026	Rhodes Jason P Director	Sale	1,170	$18.38	$21,505	10b5-1
Apr 28, 2026	Rhodes Jason P Director	Sale	119,115	$18.38	$2,189,334	10b5-1
Apr 28, 2026	Rhodes Jason P Director	Sale	59,870	$18.38	$1,100,411	10b5-1
Apr 27, 2026	Rhodes Jason P Director	Sale	90,943	$18.15	$1,650,615	10b5-1
Apr 27, 2026	Rhodes Jason P Director	Sale	45,709	$18.15	$829,618	10b5-1
Apr 27, 2026	Rhodes Jason P Director	Sale	35,947	$18.15	$652,438	10b5-1
Apr 27, 2026	Rhodes Jason P Director	Sale	894	$18.15	$16,226	10b5-1
Apr 24, 2026	Rhodes Jason P Director	Sale	28,583	$18.48	$528,214	10b5-1
Apr 24, 2026	Rhodes Jason P Director	Sale	710	$18.48	$13,121	10b5-1
Apr 24, 2026	Rhodes Jason P Director	Sale	72,310	$18.48	$1,336,289	10b5-1
Apr 24, 2026	Rhodes Jason P Director	Sale	36,345	$18.48	$671,656	10b5-1
Apr 23, 2026	Rhodes Jason P Director	Sale	15,148	$19.19	$290,690	10b5-1
Apr 23, 2026	Rhodes Jason P Director	Sale	377	$19.19	$7,235	10b5-1
Apr 23, 2026	Rhodes Jason P Director	Sale	38,322	$19.19	$735,399	10b5-1
Apr 23, 2026	Rhodes Jason P Director	Sale	19,261	$19.19	$369,619	10b5-1
Apr 22, 2026	Rhodes Jason P Director	Sale	59,663	$19.68	$1,174,168	10b5-1
Apr 22, 2026	Rhodes Jason P Director	Sale	1,485	$19.68	$29,225	10b5-1
Apr 22, 2026	Rhodes Jason P Director	Sale	150,942	$19.68	$2,970,539	10b5-1
Apr 22, 2026	Rhodes Jason P Director	Sale	75,866	$19.68	$1,493,043	10b5-1
Apr 22, 2026	Kersten Dirk Director	Sale	2,652	$20.00	$53,049	10b5-1
Apr 21, 2026	Rhodes Jason P Director	Sale	1,530	$20.05	$30,677	10b5-1
Apr 21, 2026	Rhodes Jason P Director	Sale	769	$20.05	$15,418	10b5-1
Apr 21, 2026	Rhodes Jason P Director	Sale	56,228	$19.51	$1,097,008	10b5-1
Apr 21, 2026	Rhodes Jason P Director	Sale	1,398	$19.51	$27,275	10b5-1
Apr 21, 2026	Rhodes Jason P Director	Sale	142,253	$19.51	$2,775,356	10b5-1
Apr 21, 2026	Rhodes Jason P Director	Sale	71,499	$19.51	$1,394,945	10b5-1
Apr 21, 2026	Rhodes Jason P Director	Sale	605	$20.05	$12,130	10b5-1
Apr 21, 2026	Rhodes Jason P Director	Sale	15	$20.05	$300.75	10b5-1
Apr 21, 2026	Kersten Dirk Director	Sale	8,300	$20.01	$166,120	10b5-1
Apr 20, 2026	Rhodes Jason P Director	Sale	56,368	$20.06	$1,130,742	10b5-1
Apr 20, 2026	Rhodes Jason P Director	Sale	1,401	$20.06	$28,104	10b5-1
Apr 20, 2026	Rhodes Jason P Director	Sale	142,604	$20.06	$2,860,636	10b5-1
Apr 20, 2026	Rhodes Jason P Director	Sale	71,676	$20.06	$1,437,821	10b5-1
Apr 20, 2026	Kersten Dirk Director	Sale	125,274	$20.07	$2,513,898	10b5-1
Apr 17, 2026	Kersten Dirk Director	Sale	211,974	$20.29	$4,301,292	10b5-1
Apr 16, 2026	Kersten Dirk Director	Sale	6,657	$20.06	$133,523	10b5-1
Apr 16, 2026	Kersten Dirk Director	Sale	11,116	$21.10	$234,591	10b5-1
Apr 15, 2026	Kersten Dirk Director	Sale	81,840	$20.27	$1,659,044	10b5-1
Mar 30, 2026	Posner Brian S Director	Purchase	2,000	$17.08	$34,160	Alert
Mar 11, 2026	Posner Brian S Director	Purchase	2,000	$19.35	$38,700	Alert