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Dyne Therapeutics, Inc.

DYN Mostly scheduled
CIK 0001818794 #1391 in the set updated 17 Sep 2026
Bought (12 mo)
$274.84K
out of their own pocket, the only kind of buying there is
Sold (12 mo)
$168.62M
$168.57M on a plan · $0.00 straight out of an exercise
Sold at will
$48.11K
1 of 122 sales
Net
−$168.34M
+$226.73K against sales at will

By person

12 insiders · 129 transactions
11.2×

John G. Cox holds 11.2 times base salary in stock. $8.11M of shares against $721.00K in salary for 2025.

Salary from the company's own proxy. The shares are what John G. Cox last reported holding, valued at $18.88, the price Common Stock was last bought or sold at on the open market here, on 8 Sep 2026.

Insider
Role
Bought
Sold
Net
Holding
Of company
Worth
Change
Rhodes Jason P
Director
—
$129.10M (79) scheduled
−$129.10M
428,946
0.2297%
$8.10M
−91.4%
Kersten Dirk
Director
—
$38.57M (19) scheduled
−$38.57M
3,586,796
1.92%
$67.72M
−42.1%
Cox John
CEO & President
—
$443.69K (6) scheduled
−$443.69K
429,507
0.2300%
$8.11M
+457.8%
Posner Brian S
Director
$274.84K (7)
—
+$274.84K
24,500
0.0131%
$462.56K
+188.2%
Kerr Douglas
Chief Medical Officer
—
$233.11K (7) scheduled
−$233.11K
162,564
0.0871%
$3.07M
+242.2%
Lucera Erick
Chief Financial Officer
—
$228.68K (4) scheduled
−$228.68K
119,766
0.0641%
$2.26M
—
Friedl-Naderer Johanna
Chief Commercial Officer
—
$43.38K (7) scheduled
−$43.38K
152,897
0.0819%
$2.89M
+161.8%
Beskrovnaya Oxana
Chief Scientific Officer
—
—
—
195,840
0.1049%
$3.70M
+37.2%
HIGH SUSANNA GATTI
Chief Operating Officer
—
—
—
131,636
0.0705%
$2.49M
−6.4%
Scalzo Richard William
SVP, Head of Finance & Admin.
—
—
—
122,330
0.0655%
$2.31M
+22.4%
Lubner David Charles
Director
—
—
—
0
0.0000%
$0.00
−100.0%
Incerti Carlo
Director
—
—
—
0
0.0000%
$0.00
—

Individual transactions

129
Insider
Date
Role
Action
Shares
Price
Amount
Cox John
8 Sep 2026
CEO & President
Sold on a plan
5,658
$18.88
$106.82K
Kerr Douglas
8 Sep 2026
Chief Medical Officer
Sold on a plan
1,290
$18.88
$24.36K
Friedl-Naderer Johanna
8 Sep 2026
Chief Commercial Officer
Sold on a plan
185
$18.88
$3.49K
Kerr Douglas
4 Sep 2026
Chief Medical Officer
Sold on a plan
3,745
$24.35
$91.19K
Friedl-Naderer Johanna
4 Sep 2026
Chief Commercial Officer
Sold on a plan
900
$24.35
$21.92K
Rhodes Jason P
14 Aug 2026
Director
Sold on a plan indirect
322,465
$25.00
$8.06M
Rhodes Jason P
14 Aug 2026
Director
Sold on a plan indirect
478,377
$25.00
$11.96M
Rhodes Jason P
14 Aug 2026
Director
Sold on a plan indirect
1,359,674
$25.00
$33.99M
Lucera Erick
13 Aug 2026
Chief Financial Officer
Sold on a plan
1,797
$26.28
$47.23K
Cox John
13 Aug 2026
CEO & President
Sold on a plan
4,986
$26.28
$131.03K
Kerr Douglas
13 Aug 2026
Chief Medical Officer
Sold on a plan
1,556
$26.28
$40.89K
Friedl-Naderer Johanna
13 Aug 2026
Chief Commercial Officer
Sold on a plan
226
$26.28
$5.94K
Rhodes Jason P
13 Aug 2026
Director
Sold on a plan indirect
63,643
$26.20
$1.67M
Rhodes Jason P
13 Aug 2026
Director
Sold on a plan indirect
94,415
$26.20
$2.47M
Rhodes Jason P
13 Aug 2026
Director
Sold on a plan indirect
268,354
$26.20
$7.03M
Kersten Dirk
27 Jul 2026
Director
Sold on a plan indirect
5,388
$26.04
$140.32K
Kersten Dirk
27 Jul 2026
Director
Sold on a plan indirect
256,072
$25.50
$6.53M
Rhodes Jason P
7 Jul 2026
Director
Sold on a plan indirect
5,000
$23.61
$118.05K
Rhodes Jason P
7 Jul 2026
Director
Sold on a plan indirect
11,665
$23.62
$275.53K
Rhodes Jason P
7 Jul 2026
Director
Sold on a plan indirect
49,193
$23.17
$1.14M
Rhodes Jason P
7 Jul 2026
Director
Sold on a plan indirect
14,844
$23.62
$350.62K
Rhodes Jason P
7 Jul 2026
Director
Sold on a plan indirect
62,543
$23.17
$1.45M
Rhodes Jason P
7 Jul 2026
Director
Sold on a plan indirect
29,587
$23.62
$698.84K
Rhodes Jason P
7 Jul 2026
Director
Sold on a plan indirect
124,379
$23.17
$2.88M
Rhodes Jason P
6 Jul 2026
Director
Sold on a plan indirect
100,019
$22.79
$2.28M
Rhodes Jason P
6 Jul 2026
Director
Sold on a plan indirect
127,182
$22.79
$2.90M
Rhodes Jason P
6 Jul 2026
Director
Sold on a plan indirect
253,039
$22.79
$5.77M
Rhodes Jason P
29 Jun 2026
Director
Sold on a plan indirect
40,702
$21.14
$860.44K
Rhodes Jason P
29 Jun 2026
Director
Sold on a plan indirect
51,756
$21.14
$1.09M
Rhodes Jason P
29 Jun 2026
Director
Sold on a plan indirect
102,969
$21.14
$2.18M
Rhodes Jason P
26 Jun 2026
Director
Sold on a plan indirect
64,411
$21.28
$1.37M
Rhodes Jason P
26 Jun 2026
Director
Sold on a plan indirect
81,903
$21.28
$1.74M
Rhodes Jason P
26 Jun 2026
Director
Sold on a plan indirect
162,954
$21.28
$3.47M
Rhodes Jason P
25 Jun 2026
Director
Sold on a plan indirect
5,019
$21.10
$105.90K
Rhodes Jason P
25 Jun 2026
Director
Sold on a plan indirect
6,382
$21.10
$134.66K
Rhodes Jason P
25 Jun 2026
Director
Sold on a plan indirect
12,699
$21.10
$267.95K
Lucera Erick
25 Jun 2026
Chief Financial Officer
Sell
2,362
$20.37
$48.11K
Rhodes Jason P
24 Jun 2026
Director
Sold on a plan indirect
19,973
$21.02
$419.83K
Rhodes Jason P
24 Jun 2026
Director
Sold on a plan indirect
25,397
$21.02
$533.84K
Rhodes Jason P
24 Jun 2026
Director
Sold on a plan indirect
50,530
$21.02
$1.06M
Kersten Dirk
23 Jun 2026
Director
Sold on a plan indirect
1,657
$21.47
$35.58K
Kersten Dirk
23 Jun 2026
Director
Sold on a plan indirect
71,629
$21.04
$1.51M
Rhodes Jason P
23 Jun 2026
Director
Sold on a plan indirect
30,774
$21.13
$650.25K
Rhodes Jason P
23 Jun 2026
Director
Sold on a plan indirect
39,131
$21.13
$826.84K
Rhodes Jason P
23 Jun 2026
Director
Sold on a plan indirect
77,855
$21.13
$1.65M
Kersten Dirk
22 Jun 2026
Director
Sold on a plan indirect
190,676
$20.57
$3.92M
Kersten Dirk
18 Jun 2026
Director
Sold on a plan indirect
46,901
$20.07
$941.37K
Kersten Dirk
17 Jun 2026
Director
Sold on a plan indirect
37,454
$20.14
$754.32K
Cox John
16 Jun 2026
CEO & President
Sold on a plan
2,683
$18.33
$49.18K
Friedl-Naderer Johanna
16 Jun 2026
Chief Commercial Officer
Sold on a plan
145
$18.33
$2.66K
Kerr Douglas
16 Jun 2026
Chief Medical Officer
Sold on a plan
887
$18.33
$16.26K
Posner Brian S
8 Jun 2026
Director
Buy
2,000
$16.94
$33.88K
Posner Brian S
3 Jun 2026
Director
Buy
2,500
$17.48
$43.70K
Posner Brian S
26 May 2026
Director
Buy
2,000
$18.21
$36.42K
Posner Brian S
20 May 2026
Director
Buy
2,500
$17.12
$42.80K
Cox John
13 May 2026
CEO & President
Sold on a plan
3,311
$18.36
$60.79K
Lucera Erick
13 May 2026
Chief Financial Officer
Sold on a plan
1,448
$18.36
$26.59K
Kerr Douglas
13 May 2026
Chief Medical Officer
Sold on a plan
1,564
$18.36
$28.72K
Friedl-Naderer Johanna
13 May 2026
Chief Commercial Officer
Sold on a plan
228
$18.36
$4.19K
Rhodes Jason P
6 May 2026
Director
Sold on a plan indirect
17,244
$18.18
$313.50K
Rhodes Jason P
6 May 2026
Director
Sold on a plan indirect
428
$18.18
$7.78K
Rhodes Jason P
6 May 2026
Director
Sold on a plan indirect
43,621
$18.18
$793.03K
Rhodes Jason P
6 May 2026
Director
Sold on a plan indirect
21,926
$18.18
$398.61K
Rhodes Jason P
5 May 2026
Director
Sold on a plan indirect
2,403
$18.03
$43.33K
Rhodes Jason P
5 May 2026
Director
Sold on a plan indirect
60
$18.03
$1.08K
Rhodes Jason P
5 May 2026
Director
Sold on a plan indirect
6,081
$18.03
$109.64K
Rhodes Jason P
5 May 2026
Director
Sold on a plan indirect
3,056
$18.03
$55.10K
Rhodes Jason P
4 May 2026
Director
Sold on a plan indirect
2,466
$18.00
$44.39K
Rhodes Jason P
4 May 2026
Director
Sold on a plan indirect
61
$18.00
$1.10K
Rhodes Jason P
4 May 2026
Director
Sold on a plan indirect
6,241
$18.00
$112.34K
Rhodes Jason P
4 May 2026
Director
Sold on a plan indirect
3,136
$18.00
$56.45K
Rhodes Jason P
28 Apr 2026
Director
Sold on a plan indirect
21
$19.00
$399.00
Rhodes Jason P
28 Apr 2026
Director
Sold on a plan indirect
1
$19.00
$19.00
Rhodes Jason P
28 Apr 2026
Director
Sold on a plan indirect
52
$19.00
$988.00
Rhodes Jason P
28 Apr 2026
Director
Sold on a plan indirect
26
$19.00
$494.00
Rhodes Jason P
28 Apr 2026
Director
Sold on a plan indirect
47,082
$18.38
$865.37K
Rhodes Jason P
28 Apr 2026
Director
Sold on a plan indirect
1,170
$18.38
$21.50K
Rhodes Jason P
28 Apr 2026
Director
Sold on a plan indirect
119,115
$18.38
$2.19M
Rhodes Jason P
28 Apr 2026
Director
Sold on a plan indirect
59,870
$18.38
$1.10M
Rhodes Jason P
27 Apr 2026
Director
Sold on a plan indirect
35,947
$18.15
$652.44K
Rhodes Jason P
27 Apr 2026
Director
Sold on a plan indirect
894
$18.15
$16.23K
Rhodes Jason P
27 Apr 2026
Director
Sold on a plan indirect
90,943
$18.15
$1.65M
Rhodes Jason P
27 Apr 2026
Director
Sold on a plan indirect
45,709
$18.15
$829.62K
Rhodes Jason P
24 Apr 2026
Director
Sold on a plan indirect
28,583
$18.48
$528.21K
Rhodes Jason P
24 Apr 2026
Director
Sold on a plan indirect
710
$18.48
$13.12K
Rhodes Jason P
24 Apr 2026
Director
Sold on a plan indirect
72,310
$18.48
$1.34M
Rhodes Jason P
24 Apr 2026
Director
Sold on a plan indirect
36,345
$18.48
$671.66K
Rhodes Jason P
23 Apr 2026
Director
Sold on a plan indirect
15,148
$19.19
$290.69K
Rhodes Jason P
23 Apr 2026
Director
Sold on a plan indirect
377
$19.19
$7.23K
Rhodes Jason P
23 Apr 2026
Director
Sold on a plan indirect
38,322
$19.19
$735.40K
Rhodes Jason P
23 Apr 2026
Director
Sold on a plan indirect
19,261
$19.19
$369.62K
Rhodes Jason P
22 Apr 2026
Director
Sold on a plan indirect
59,663
$19.68
$1.17M
Rhodes Jason P
22 Apr 2026
Director
Sold on a plan indirect
1,485
$19.68
$29.22K
Rhodes Jason P
22 Apr 2026
Director
Sold on a plan indirect
150,942
$19.68
$2.97M
Rhodes Jason P
22 Apr 2026
Director
Sold on a plan indirect
75,866
$19.68
$1.49M
Kersten Dirk
22 Apr 2026
Director
Sold on a plan indirect
2,652
$20.00
$53.05K
Rhodes Jason P
21 Apr 2026
Director
Sold on a plan indirect
605
$20.05
$12.13K
Rhodes Jason P
21 Apr 2026
Director
Sold on a plan indirect
15
$20.05
$300.75
Rhodes Jason P
21 Apr 2026
Director
Sold on a plan indirect
1,530
$20.05
$30.68K
Rhodes Jason P
21 Apr 2026
Director
Sold on a plan indirect
769
$20.05
$15.42K
Rhodes Jason P
21 Apr 2026
Director
Sold on a plan indirect
56,228
$19.51
$1.10M
Rhodes Jason P
21 Apr 2026
Director
Sold on a plan indirect
1,398
$19.51
$27.27K
Rhodes Jason P
21 Apr 2026
Director
Sold on a plan indirect
142,253
$19.51
$2.78M
Rhodes Jason P
21 Apr 2026
Director
Sold on a plan indirect
71,499
$19.51
$1.39M
Kersten Dirk
21 Apr 2026
Director
Sold on a plan indirect
8,300
$20.01
$166.12K
Kersten Dirk
20 Apr 2026
Director
Sold on a plan indirect
125,274
$20.07
$2.51M
Rhodes Jason P
20 Apr 2026
Director
Sold on a plan indirect
56,368
$20.06
$1.13M
Rhodes Jason P
20 Apr 2026
Director
Sold on a plan indirect
1,401
$20.06
$28.10K
Rhodes Jason P
20 Apr 2026
Director
Sold on a plan indirect
142,604
$20.06
$2.86M
Rhodes Jason P
20 Apr 2026
Director
Sold on a plan indirect
71,676
$20.06
$1.44M
Kersten Dirk
17 Apr 2026
Director
Sold on a plan indirect
211,974
$20.29
$4.30M
Kersten Dirk
16 Apr 2026
Director
Sold on a plan indirect
6,657
$20.06
$133.52K
Kersten Dirk
16 Apr 2026
Director
Sold on a plan indirect
11,116
$21.10
$234.59K
Kersten Dirk
15 Apr 2026
Director
Sold on a plan indirect
81,840
$20.27
$1.66M
Lucera Erick
1 Apr 2026
Chief Financial Officer
Sold on a plan
5,727
$18.64
$106.75K
Posner Brian S
30 Mar 2026
Director
Buy
2,000
$17.08
$34.16K
Kersten Dirk
11 Mar 2026
Director
Sold on a plan indirect
129,672
$19.52
$2.53M
Posner Brian S
11 Mar 2026
Director
Buy
2,000
$19.35
$38.70K
Kersten Dirk
10 Mar 2026
Director
Sold on a plan indirect
281,858
$19.80
$5.58M
Kersten Dirk
10 Mar 2026
Director
Sold on a plan indirect
219,758
$19.33
$4.25M
Kersten Dirk
10 Mar 2026
Director
Sold on a plan indirect
9,482
$18.21
$172.69K
Kersten Dirk
9 Mar 2026
Director
Sold on a plan indirect
177,690
$17.72
$3.15M
Posner Brian S
6 Mar 2026
Director
Buy
3,000
$15.06
$45.18K
Cox John
5 Mar 2026
CEO & President
Sold on a plan
2,732
$14.90
$40.71K
Kerr Douglas
5 Mar 2026
Chief Medical Officer
Sold on a plan
904
$14.90
$13.47K
Friedl-Naderer Johanna
5 Mar 2026
Chief Commercial Officer
Sold on a plan
148
$14.90
$2.21K
Friedl-Naderer Johanna
5 Dec 2025
Chief Commercial Officer
Sold on a plan
144
$20.72
$2.98K
Kerr Douglas
5 Dec 2025
Chief Medical Officer
Sold on a plan
880
$20.72
$18.23K
Cox John
5 Dec 2025
CEO & President
Sold on a plan
2,662
$20.72
$55.16K

What was left out

Form 4 filings counted 59
Amendments (4/A) skipped 0
Filings about a different issuer 0
Unreadable filings 0
Joint filings 0
Sales on a Rule 10b5-1 plan 121
Sales straight out of an exercise 0
Sales at will 1
Transactions with no price 0
Shares from compensation/vesting 443,625
History held since 18 Sep 2020