DYN US Equity

Dyne Therapeutics, Inc.

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Health Care · Pharmaceutical Preparations · CIK 1818794 · FYE 1231

$25.90

+0.27 (+1.05%)

USD · as of 2026-07-28 · marketstack

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Insider activity· execs, directors & 10%-owners · DYN

Open-market buys · 12mo

7 · $274,840

Open-market sells · 12mo

100 · $79M

Net · 12mo

−$78M · −99%

Only open-market buys / sells (codes P/S) are a conviction signal; grants, option exercises, tax-withholding, and gifts are compensation mechanics, shown but greyed. The trailing 12-month tallies run to today but the store covers filings through 2026-06-30 only (SEC bulk data sets publish quarterly), so recent activity may be absent.

Date	Insider	Role	Transaction	Shares	Price	Value
2026-06-29	Rhodes Jason P	Director	−Sell	51,756	$21.14	$1M
2026-06-29	Rhodes Jason P	Director	−Sell	40,702	$21.14	$860,440
2026-06-29	Rhodes Jason P	Director	−Sell	102,969	$21.14	$2M
2026-06-26	Rhodes Jason P	Director	−Sell	64,411	$21.28	$1M
2026-06-26	Rhodes Jason P	Director	−Sell	81,903	$21.28	$2M
2026-06-26	Rhodes Jason P	Director	−Sell	162,954	$21.28	$3M
2026-06-25	Rhodes Jason P	Director	−Sell	5,019	$21.10	$105,901
2026-06-25	Rhodes Jason P	Director	−Sell	12,699	$21.10	$267,949
2026-06-25	Rhodes Jason P	Director	−Sell	6,382	$21.10	$134,660
2026-06-25	Lucera Erick	Officer	−Sell	2,362	$20.37	$48,114
2026-06-24	Rhodes Jason P	Director	−Sell	50,530	$21.02	$1M
2026-06-24	Rhodes Jason P	Director	−Sell	25,397	$21.02	$533,845
2026-06-24	Rhodes Jason P	Director	−Sell	19,973	$21.02	$419,832
2026-06-23	Kersten Dirk	Director	−Sell	71,629	$21.04	$2M
2026-06-23	Kersten Dirk	Director	−Sell	1,657	$21.47	$35,576
2026-06-23	Rhodes Jason P	Director	−Sell	39,131	$21.13	$826,838
2026-06-23	Rhodes Jason P	Director	−Sell	77,855	$21.13	$2M
2026-06-23	Rhodes Jason P	Director	−Sell	30,774	$21.13	$650,255
2026-06-22	Kersten Dirk	Director	−Sell	190,676	$20.57	$4M
2026-06-18	Kersten Dirk	Director	−Sell	46,901	$20.07	$941,303
2026-06-17	Kersten Dirk	Director	−Sell	37,454	$20.14	$754,324
2026-06-16	Cox John	Director,Officer	−Sell	2,683	$18.33	$49,179
2026-06-16	Friedl-Naderer Johanna	Officer	−Sell	145	$18.33	$2,658
2026-06-16	Kerr Douglas	Officer	−Sell	887	$18.33	$16,259
2026-06-08	Posner Brian S	Director	+Buy	2,000	$16.94	$33,880
2026-06-03	Posner Brian S	Director	+Buy	2,500	$17.48	$43,700
2026-05-26	Posner Brian S	Director	+Buy	2,000	$18.21	$36,420
2026-05-20	Posner Brian S	Director	+Buy	2,500	$17.12	$42,800
2026-05-13	Cox John	Director,Officer	−Sell	3,311	$18.36	$60,790
2026-05-13	Lucera Erick	Officer	−Sell	1,448	$18.36	$26,585
2026-05-13	Kerr Douglas	Officer	−Sell	1,564	$18.36	$28,715
2026-05-13	Friedl-Naderer Johanna	Officer	−Sell	228	$18.36	$4,186
2026-05-06	Rhodes Jason P	Director	−Sell	17,244	$18.18	$313,496
2026-05-06	Rhodes Jason P	Director	−Sell	428	$18.18	$7,781
2026-05-06	Rhodes Jason P	Director	−Sell	43,621	$18.18	$793,030
2026-05-06	Rhodes Jason P	Director	−Sell	21,926	$18.18	$398,615
2026-05-05	Rhodes Jason P	Director	−Sell	2,403	$18.03	$43,326
2026-05-05	Rhodes Jason P	Director	−Sell	60	$18.03	$1,082
2026-05-05	Rhodes Jason P	Director	−Sell	6,081	$18.03	$109,640
2026-05-05	Rhodes Jason P	Director	−Sell	3,056	$18.03	$55,100
2026-05-04	Rhodes Jason P	Director	−Sell	6,241	$18.00	$112,338
2026-05-04	Rhodes Jason P	Director	−Sell	3,136	$18.00	$56,448
2026-05-04	Rhodes Jason P	Director	−Sell	2,466	$18.00	$44,388
2026-05-04	Rhodes Jason P	Director	−Sell	61	$18.00	$1,098
2026-04-28	Rhodes Jason P	Director	−Sell	119,115	$18.38	$2M
2026-04-28	Rhodes Jason P	Director	−Sell	59,870	$18.38	$1M
2026-04-28	Rhodes Jason P	Director	−Sell	21	$19.00	$399
2026-04-28	Rhodes Jason P	Director	−Sell	1,170	$18.38	$21,505
2026-04-28	Rhodes Jason P	Director	−Sell	47,082	$18.38	$865,367
2026-04-28	Rhodes Jason P	Director	−Sell	1	$19.00	$19
2026-04-28	Rhodes Jason P	Director	−Sell	52	$19.00	$988
2026-04-28	Rhodes Jason P	Director	−Sell	26	$19.00	$494
2026-04-27	Rhodes Jason P	Director	−Sell	894	$18.15	$16,226
2026-04-27	Rhodes Jason P	Director	−Sell	35,947	$18.15	$652,438
2026-04-27	Rhodes Jason P	Director	−Sell	90,943	$18.15	$2M
2026-04-27	Rhodes Jason P	Director	−Sell	45,709	$18.15	$829,618
2026-04-24	Rhodes Jason P	Director	−Sell	36,345	$18.48	$671,656
2026-04-24	Rhodes Jason P	Director	−Sell	28,583	$18.48	$528,214
2026-04-24	Rhodes Jason P	Director	−Sell	710	$18.48	$13,121
2026-04-24	Rhodes Jason P	Director	−Sell	72,310	$18.48	$1M
2026-04-24	Lubner David Charles	Director	−Gift	53,625	—	—
2026-04-23	Rhodes Jason P	Director	−Sell	19,261	$19.19	$369,619
2026-04-23	Rhodes Jason P	Director	−Sell	38,322	$19.19	$735,399
2026-04-23	Rhodes Jason P	Director	−Sell	377	$19.19	$7,235
2026-04-23	Rhodes Jason P	Director	−Sell	15,148	$19.19	$290,690
2026-04-22	Rhodes Jason P	Director	−Sell	75,866	$19.68	$1M
2026-04-22	Rhodes Jason P	Director	−Sell	150,942	$19.68	$3M
2026-04-22	Rhodes Jason P	Director	−Sell	1,485	$19.68	$29,225
2026-04-22	Rhodes Jason P	Director	−Sell	59,663	$19.68	$1M
2026-04-22	Kersten Dirk	Director	−Sell	2,652	$20.00	$53,040
2026-04-21	Rhodes Jason P	Director	−Sell	605	$20.05	$12,130
2026-04-21	Rhodes Jason P	Director	−Sell	71,499	$19.51	$1M
2026-04-21	Rhodes Jason P	Director	−Sell	142,253	$19.51	$3M
2026-04-21	Rhodes Jason P	Director	−Sell	1,398	$19.51	$27,275
2026-04-21	Rhodes Jason P	Director	−Sell	56,228	$19.51	$1M
2026-04-21	Rhodes Jason P	Director	−Sell	769	$20.05	$15,418
2026-04-21	Rhodes Jason P	Director	−Sell	1,530	$20.05	$30,677
2026-04-21	Rhodes Jason P	Director	−Sell	15	$20.05	$301
2026-04-21	Kersten Dirk	Director	−Sell	8,300	$20.01	$166,083
2026-04-20	Kersten Dirk	Director	−Sell	125,274	$20.07	$3M
2026-04-20	Rhodes Jason P	Director	−Sell	71,676	$20.06	$1M
2026-04-20	Rhodes Jason P	Director	−Sell	142,604	$20.06	$3M
2026-04-20	Rhodes Jason P	Director	−Sell	1,401	$20.06	$28,104
2026-04-20	Rhodes Jason P	Director	−Sell	56,368	$20.06	$1M
2026-04-17	Kersten Dirk	Director	−Sell	211,974	$20.29	$4M
2026-04-16	Kersten Dirk	Director	−Sell	11,116	$21.10	$234,548
2026-04-16	Kersten Dirk	Director	−Sell	6,657	$20.06	$133,539
2026-04-15	Kersten Dirk	Director	−Sell	81,840	$20.27	$2M
2026-04-01	Lucera Erick	Officer	−Sell	5,727	$18.64	$106,751
2026-03-30	Posner Brian S	Director	+Buy	2,000	$17.08	$34,160
2026-03-11	Kersten Dirk	Director	−Sell	129,672	$19.52	$3M
2026-03-11	Posner Brian S	Director	+Buy	2,000	$19.35	$38,700
2026-03-10	Kersten Dirk	Director	−Sell	219,758	$19.33	$4M
2026-03-10	Kersten Dirk	Director	−Sell	9,482	$18.21	$172,667
2026-03-10	Kersten Dirk	Director	−Sell	281,858	$19.80	$6M
2026-03-09	Kersten Dirk	Director	−Sell	177,690	$17.72	$3M
2026-03-06	Posner Brian S	Director	+Buy	3,000	$15.06	$45,180
2026-03-05	Cox John	Director,Officer	−Sell	2,732	$14.90	$40,707
2026-03-05	Kerr Douglas	Officer	−Sell	904	$14.90	$13,470
2026-03-05	Friedl-Naderer Johanna	Officer	−Sell	148	$14.90	$2,205
2026-02-12	Lucera Erick	Officer	+Grant	65,000	—	—
2026-02-12	Friedl-Naderer Johanna	Officer	+Grant	60,000	—	—
2026-02-12	Kerr Douglas	Officer	+Grant	85,000	—	—
2026-02-12	Cox John	Director,Officer	+Grant	180,000	—	—
2025-12-05	Friedl-Naderer Johanna	Officer	−Sell	144	$20.72	$2,984
2025-12-05	Kerr Douglas	Officer	−Sell	880	$20.72	$18,234
2025-12-05	Cox John	Director,Officer	−Sell	2,662	$20.72	$55,157
2025-09-05	Kerr Douglas	Officer	−Sell	873	$13.41	$11,707
2025-09-05	Friedl-Naderer Johanna	Officer	−Sell	144	$13.41	$1,931
2025-09-05	Cox John	Director,Officer	−Sell	2,640	$13.41	$35,402
2025-09-04	Kerr Douglas	Officer	−Sell	3,552	$13.27	$47,135
2025-09-04	Friedl-Naderer Johanna	Officer	−Sell	894	$13.27	$11,863
2025-07-15	Cox John	Director,Officer	−Gift	10,000	—	—
2025-07-15	Cox John	Director,Officer	−Gift	10,000	—	—
2025-07-15	Cox John	Director,Officer	−Gift	10,000	—	—
2025-07-15	Cox John	Director,Officer	−Gift	10,000	—	—
2025-07-14	Cox John	Director,Officer	+Buy	100,000	$9.11	$911,000
2025-06-05	Friedl-Naderer Johanna	Officer	−Sell	146	$13.35	$1,949
2025-06-05	Kerr Douglas	Officer	−Sell	1,342	$13.35	$17,916
2025-06-05	Cox John	Director,Officer	−Sell	4,060	$13.35	$54,201

Source: the SEC bulk insider (Form 3/4/5) data sets — non-derivative transactions in the issuer's common stock, most recent first, covering filings through 2026-06-30. Insiders file within 2 business days of a transaction, but the bulk sets publish quarterly, so this store lags live filings; option/derivative lines are excluded. Codes: P buy · S sell · A grant · M/X/C exercise · F tax · G gift.

Model-derived estimate for research. See the Disclaimer.

Insider activity· execs, directors & 10%-owners · DYN

Open-market buys · 12mo

7 · $274,840

Open-market sells · 12mo

100 · $79M

Net · 12mo

−$78M · −99%

Date	Insider	Role	Transaction	Shares	Price	Value
2026-06-29	Rhodes Jason P	Director	−Sell	51,756	$21.14	$1M
2026-06-29	Rhodes Jason P	Director	−Sell	40,702	$21.14	$860,440
2026-06-29	Rhodes Jason P	Director	−Sell	102,969	$21.14	$2M
2026-06-26	Rhodes Jason P	Director	−Sell	64,411	$21.28	$1M
2026-06-26	Rhodes Jason P	Director	−Sell	81,903	$21.28	$2M
2026-06-26	Rhodes Jason P	Director	−Sell	162,954	$21.28	$3M
2026-06-25	Rhodes Jason P	Director	−Sell	5,019	$21.10	$105,901
2026-06-25	Rhodes Jason P	Director	−Sell	12,699	$21.10	$267,949
2026-06-25	Rhodes Jason P	Director	−Sell	6,382	$21.10	$134,660
2026-06-25	Lucera Erick	Officer	−Sell	2,362	$20.37	$48,114
2026-06-24	Rhodes Jason P	Director	−Sell	50,530	$21.02	$1M
2026-06-24	Rhodes Jason P	Director	−Sell	25,397	$21.02	$533,845
2026-06-24	Rhodes Jason P	Director	−Sell	19,973	$21.02	$419,832
2026-06-23	Kersten Dirk	Director	−Sell	71,629	$21.04	$2M
2026-06-23	Kersten Dirk	Director	−Sell	1,657	$21.47	$35,576
2026-06-23	Rhodes Jason P	Director	−Sell	39,131	$21.13	$826,838
2026-06-23	Rhodes Jason P	Director	−Sell	77,855	$21.13	$2M
2026-06-23	Rhodes Jason P	Director	−Sell	30,774	$21.13	$650,255
2026-06-22	Kersten Dirk	Director	−Sell	190,676	$20.57	$4M
2026-06-18	Kersten Dirk	Director	−Sell	46,901	$20.07	$941,303
2026-06-17	Kersten Dirk	Director	−Sell	37,454	$20.14	$754,324
2026-06-16	Cox John	Director,Officer	−Sell	2,683	$18.33	$49,179
2026-06-16	Friedl-Naderer Johanna	Officer	−Sell	145	$18.33	$2,658
2026-06-16	Kerr Douglas	Officer	−Sell	887	$18.33	$16,259
2026-06-08	Posner Brian S	Director	+Buy	2,000	$16.94	$33,880
2026-06-03	Posner Brian S	Director	+Buy	2,500	$17.48	$43,700
2026-05-26	Posner Brian S	Director	+Buy	2,000	$18.21	$36,420
2026-05-20	Posner Brian S	Director	+Buy	2,500	$17.12	$42,800
2026-05-13	Cox John	Director,Officer	−Sell	3,311	$18.36	$60,790
2026-05-13	Lucera Erick	Officer	−Sell	1,448	$18.36	$26,585
2026-05-13	Kerr Douglas	Officer	−Sell	1,564	$18.36	$28,715
2026-05-13	Friedl-Naderer Johanna	Officer	−Sell	228	$18.36	$4,186
2026-05-06	Rhodes Jason P	Director	−Sell	17,244	$18.18	$313,496
2026-05-06	Rhodes Jason P	Director	−Sell	428	$18.18	$7,781
2026-05-06	Rhodes Jason P	Director	−Sell	43,621	$18.18	$793,030
2026-05-06	Rhodes Jason P	Director	−Sell	21,926	$18.18	$398,615
2026-05-05	Rhodes Jason P	Director	−Sell	2,403	$18.03	$43,326
2026-05-05	Rhodes Jason P	Director	−Sell	60	$18.03	$1,082
2026-05-05	Rhodes Jason P	Director	−Sell	6,081	$18.03	$109,640
2026-05-05	Rhodes Jason P	Director	−Sell	3,056	$18.03	$55,100
2026-05-04	Rhodes Jason P	Director	−Sell	6,241	$18.00	$112,338
2026-05-04	Rhodes Jason P	Director	−Sell	3,136	$18.00	$56,448
2026-05-04	Rhodes Jason P	Director	−Sell	2,466	$18.00	$44,388
2026-05-04	Rhodes Jason P	Director	−Sell	61	$18.00	$1,098
2026-04-28	Rhodes Jason P	Director	−Sell	119,115	$18.38	$2M
2026-04-28	Rhodes Jason P	Director	−Sell	59,870	$18.38	$1M
2026-04-28	Rhodes Jason P	Director	−Sell	21	$19.00	$399
2026-04-28	Rhodes Jason P	Director	−Sell	1,170	$18.38	$21,505
2026-04-28	Rhodes Jason P	Director	−Sell	47,082	$18.38	$865,367
2026-04-28	Rhodes Jason P	Director	−Sell	1	$19.00	$19
2026-04-28	Rhodes Jason P	Director	−Sell	52	$19.00	$988
2026-04-28	Rhodes Jason P	Director	−Sell	26	$19.00	$494
2026-04-27	Rhodes Jason P	Director	−Sell	894	$18.15	$16,226
2026-04-27	Rhodes Jason P	Director	−Sell	35,947	$18.15	$652,438
2026-04-27	Rhodes Jason P	Director	−Sell	90,943	$18.15	$2M
2026-04-27	Rhodes Jason P	Director	−Sell	45,709	$18.15	$829,618
2026-04-24	Rhodes Jason P	Director	−Sell	36,345	$18.48	$671,656
2026-04-24	Rhodes Jason P	Director	−Sell	28,583	$18.48	$528,214
2026-04-24	Rhodes Jason P	Director	−Sell	710	$18.48	$13,121
2026-04-24	Rhodes Jason P	Director	−Sell	72,310	$18.48	$1M
2026-04-24	Lubner David Charles	Director	−Gift	53,625	—	—
2026-04-23	Rhodes Jason P	Director	−Sell	19,261	$19.19	$369,619
2026-04-23	Rhodes Jason P	Director	−Sell	38,322	$19.19	$735,399
2026-04-23	Rhodes Jason P	Director	−Sell	377	$19.19	$7,235
2026-04-23	Rhodes Jason P	Director	−Sell	15,148	$19.19	$290,690
2026-04-22	Rhodes Jason P	Director	−Sell	75,866	$19.68	$1M
2026-04-22	Rhodes Jason P	Director	−Sell	150,942	$19.68	$3M
2026-04-22	Rhodes Jason P	Director	−Sell	1,485	$19.68	$29,225
2026-04-22	Rhodes Jason P	Director	−Sell	59,663	$19.68	$1M
2026-04-22	Kersten Dirk	Director	−Sell	2,652	$20.00	$53,040
2026-04-21	Rhodes Jason P	Director	−Sell	605	$20.05	$12,130
2026-04-21	Rhodes Jason P	Director	−Sell	71,499	$19.51	$1M
2026-04-21	Rhodes Jason P	Director	−Sell	142,253	$19.51	$3M
2026-04-21	Rhodes Jason P	Director	−Sell	1,398	$19.51	$27,275
2026-04-21	Rhodes Jason P	Director	−Sell	56,228	$19.51	$1M
2026-04-21	Rhodes Jason P	Director	−Sell	769	$20.05	$15,418
2026-04-21	Rhodes Jason P	Director	−Sell	1,530	$20.05	$30,677
2026-04-21	Rhodes Jason P	Director	−Sell	15	$20.05	$301
2026-04-21	Kersten Dirk	Director	−Sell	8,300	$20.01	$166,083
2026-04-20	Kersten Dirk	Director	−Sell	125,274	$20.07	$3M
2026-04-20	Rhodes Jason P	Director	−Sell	71,676	$20.06	$1M
2026-04-20	Rhodes Jason P	Director	−Sell	142,604	$20.06	$3M
2026-04-20	Rhodes Jason P	Director	−Sell	1,401	$20.06	$28,104
2026-04-20	Rhodes Jason P	Director	−Sell	56,368	$20.06	$1M
2026-04-17	Kersten Dirk	Director	−Sell	211,974	$20.29	$4M
2026-04-16	Kersten Dirk	Director	−Sell	11,116	$21.10	$234,548
2026-04-16	Kersten Dirk	Director	−Sell	6,657	$20.06	$133,539
2026-04-15	Kersten Dirk	Director	−Sell	81,840	$20.27	$2M
2026-04-01	Lucera Erick	Officer	−Sell	5,727	$18.64	$106,751
2026-03-30	Posner Brian S	Director	+Buy	2,000	$17.08	$34,160
2026-03-11	Kersten Dirk	Director	−Sell	129,672	$19.52	$3M
2026-03-11	Posner Brian S	Director	+Buy	2,000	$19.35	$38,700
2026-03-10	Kersten Dirk	Director	−Sell	219,758	$19.33	$4M
2026-03-10	Kersten Dirk	Director	−Sell	9,482	$18.21	$172,667
2026-03-10	Kersten Dirk	Director	−Sell	281,858	$19.80	$6M
2026-03-09	Kersten Dirk	Director	−Sell	177,690	$17.72	$3M
2026-03-06	Posner Brian S	Director	+Buy	3,000	$15.06	$45,180
2026-03-05	Cox John	Director,Officer	−Sell	2,732	$14.90	$40,707
2026-03-05	Kerr Douglas	Officer	−Sell	904	$14.90	$13,470
2026-03-05	Friedl-Naderer Johanna	Officer	−Sell	148	$14.90	$2,205
2026-02-12	Lucera Erick	Officer	+Grant	65,000	—	—
2026-02-12	Friedl-Naderer Johanna	Officer	+Grant	60,000	—	—
2026-02-12	Kerr Douglas	Officer	+Grant	85,000	—	—
2026-02-12	Cox John	Director,Officer	+Grant	180,000	—	—
2025-12-05	Friedl-Naderer Johanna	Officer	−Sell	144	$20.72	$2,984
2025-12-05	Kerr Douglas	Officer	−Sell	880	$20.72	$18,234
2025-12-05	Cox John	Director,Officer	−Sell	2,662	$20.72	$55,157
2025-09-05	Kerr Douglas	Officer	−Sell	873	$13.41	$11,707
2025-09-05	Friedl-Naderer Johanna	Officer	−Sell	144	$13.41	$1,931
2025-09-05	Cox John	Director,Officer	−Sell	2,640	$13.41	$35,402
2025-09-04	Kerr Douglas	Officer	−Sell	3,552	$13.27	$47,135
2025-09-04	Friedl-Naderer Johanna	Officer	−Sell	894	$13.27	$11,863
2025-07-15	Cox John	Director,Officer	−Gift	10,000	—	—
2025-07-15	Cox John	Director,Officer	−Gift	10,000	—	—
2025-07-15	Cox John	Director,Officer	−Gift	10,000	—	—
2025-07-15	Cox John	Director,Officer	−Gift	10,000	—	—
2025-07-14	Cox John	Director,Officer	+Buy	100,000	$9.11	$911,000
2025-06-05	Friedl-Naderer Johanna	Officer	−Sell	146	$13.35	$1,949
2025-06-05	Kerr Douglas	Officer	−Sell	1,342	$13.35	$17,916
2025-06-05	Cox John	Director,Officer	−Sell	4,060	$13.35	$54,201

Model-derived estimate for research. See the Disclaimer.

DYN US Equity☆

Insider activity· execs, directors & 10%-owners · DYN

Insider activity· execs, directors & 10%-owners · DYN

DYN US Equity