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 B  AB  JB*  OB  OE*  OE
 S  AS  JS*  OS  OS*  3
 JB
 JS
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Detailed Insider History for:
DYNE THERAPEUTICS INC: DYN
Price: 7/17/26 52-Wk
High		 52-Wk
Low		 Mkt Cap (mm) Shrs Out (mm) 3-Mth Ave
Vol (m)		 Ind. Yield Short Int
% Float		 Inst. Owned Insider Owned
$23.74 $25.00 $8.88 $3,925 165 1,833 0.0% 17.9% 115.71% 0.28%
Exch Sector Industry Sub-Industry
NasdaqGS Manufacturing Chemicals And Allied Products Pharmaceutical Preparations
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Insider Statistics
T N H M S
Filer Name
Insider Title
Trans Type
Dollar Value
Shares Traded
Trans Date From
Trans Date To
Trans Price From
Trans Price To
Total Holdings
Delta % Owned
Owned
Other Info
Input Date
1
1y
5
100%
-41%
4
RHODES JASON P
DIR
AS
$17,858,492
777,451
7/6/26
7/7/26
$22.79
$23.61
2,962
-99.6
I
10b
7/8/26 - 5:35:11 pm
2
1y
5
100%
-41%
4
RHODES JASON P
DIR
AS
$10,712,550
504,695
6/26/26
6/29/26
---
$21.14
975,931
-34.1
I
10b
6/30/26 - 7:05:14 pm
3
3m
1
0%
22%
4
LUCERA ERICK
CFO
S
$48,114
2,362
---
6/25/26
---
$20.37
121,563
-1.9
D
R
6/26/26 - 4:15:07 pm
4
1y
5
100%
-41%
4
RHODES JASON P
DIR
AS
$5,646,497
267,760
6/23/26
6/25/26
$21.02
$21.10
1,081,044
-19.9
I
10b
6/26/26 - 8:40:23 am
5
1y
22
100%
-59%
1
KERSTEN DIRK
DIR
AS
$5,464,612
263,962
6/22/26
6/23/26
$20.57
$21.47
3,848,256
-6.4
I
10b
6/24/26 - 4:27:26 pm
6
    
 
GREENE BARRY E
DIR
3
---
---
---
6/22/26
---
---
---
---
---
---
6/23/26 - 4:05:03 pm
7
1y
22
100%
-59%
1
KERSTEN DIRK
DIR
AS
$1,695,690
84,355
6/17/26
6/18/26
---
$20.07
4,112,218
-2.0
I
10b
6/22/26 - 4:15:03 pm
8
1y
2
0%
18%
2
KERR DOUGLAS
O
AS
$16,259
887
---
6/16/26
---
$18.33
169,155
-0.5
D
10b
6/17/26 - 4:08:45 pm
9
1y
2
0%
33%
2
FRIEDL NADERER JOHANNA
O
AS
$2,658
145
---
6/16/26
---
$18.33
154,208
-0.1
D
10b
6/17/26 - 4:07:50 pm
10
1y
2
0%
18%
3
COX JOHN
CEO,PR,DIR
AS
$49,179
2,683
---
6/16/26
---
$18.33
368,151
-0.7
D
10b
6/17/26 - 4:07:11 pm
11
3m
3
67%
4%
6
POSNER BRIAN S
DIR
B
$33,880
2,000
---
6/8/26
---
$16.94
24,500
8.9
D
---
6/9/26 - 5:06:18 pm
12
3m
3
67%
4%
6
POSNER BRIAN S
DIR
B
$43,700
2,500
---
6/3/26
---
$17.48
22,500
12.5
D
---
6/5/26 - 4:10:04 pm
13
3m
3
67%
4%
6
POSNER BRIAN S
DIR
B
$36,420
2,000
---
5/26/26
---
$18.21
20,000
11.1
D
---
5/28/26 - 4:11:20 pm
14
3m
3
67%
4%
6
POSNER BRIAN S
DIR
B
$42,800
2,500
---
5/20/26
---
$17.12
18,000
16.1
D
---
5/22/26 - 4:10:03 pm
15
1y
2
0%
33%
2
FRIEDL NADERER JOHANNA
O
AS
$4,186
228
---
5/13/26
---
$18.36
154,353
-0.1
D
10b
5/14/26 - 4:05:18 pm
16
1y
2
0%
18%
2
KERR DOUGLAS
O
AS
$28,715
1,564
---
5/13/26
---
$18.36
170,042
-0.9
D
10b
5/14/26 - 4:04:28 pm
17
3m
1
0%
22%
4
LUCERA ERICK
CFO
AS
$26,585
1,448
---
5/13/26
---
$18.36
123,925
-1.2
D
10b
5/14/26 - 4:03:26 pm
18
1y
2
0%
18%
3
COX JOHN
CEO,PR,DIR
AS
$60,790
3,311
---
5/13/26
---
$18.36
370,834
-0.9
D
10b
5/14/26 - 4:02:42 pm
19
1y
5
100%
-41%
4
RHODES JASON P
DIR
AS
$1,936,341
106,723
5/4/26
5/6/26
$18.00
$18.18
7,962
-93.1
I
10b
5/6/26 - 5:09:41 pm
20
1y
5
100%
-41%
4
RHODES JASON P
DIR
AS
$4,178,516
227,337
---
4/28/26
$18.38
$19.00
8,511
-96.4
I
10b
4/30/26 - 5:22:11 pm
21
1y
5
100%
-41%
4
RHODES JASON P
DIR
AS
$7,101,120
384,549
4/23/26
4/27/26
---
$18.15
9,682
-97.5
I
10b
4/27/26 - 6:15:33 pm
22
    
 
LUBNER DAVID CHARLES
DIR
JS
---
53,625
---
4/24/26
---
---
---
All
D
---
4/28/26 - 4:56:31 pm
23
1y
22
100%
-59%
1
KERSTEN DIRK
DIR
AS
$219,170
10,952
4/21/26
4/22/26
---
$20.00
4,196,573
-0.3
I
10b
4/23/26 - 4:15:03 pm
24
1y
5
100%
-41%
4
RHODES JASON P
DIR
AS
$16,477,388
834,302
4/20/26
4/22/26
$19.51
$19.68
11,663
-98.6
I
10b
4/22/26 - 6:27:22 pm
25
1y
22
100%
-59%
1
KERSTEN DIRK
DIR
AS
$6,815,190
337,248
4/17/26
4/20/26
---
$20.07
4,207,525
-7.4
I
10b
4/21/26 - 4:15:06 pm
26
1y
22
100%
-59%
1
KERSTEN DIRK
DIR
AS
$2,027,158
99,613
4/15/26
4/16/26
---
$20.06
4,544,773
-2.1
I
10b
4/17/26 - 4:05:04 pm
27
3m
1
0%
22%
4
LUCERA ERICK
CFO
AS
$106,751
5,727
---
4/1/26
---
$18.64
125,373
-4.4
D
10b
4/3/26 - 4:10:06 pm
28
3m
3
67%
4%
6
POSNER BRIAN S
DIR
B
$34,160
2,000
---
3/30/26
---
$17.08
15,500
14.8
D
---
4/1/26 - 4:27:51 pm
29
3m
3
67%
4%
6
POSNER BRIAN S
DIR
B
$38,700
2,000
---
3/11/26
---
$19.35
13,500
17.4
D
---
3/13/26 - 4:46:19 pm
30
1y
22
100%
-59%
1
KERSTEN DIRK
DIR
AS
$2,530,562
129,672
---
3/11/26
---
$19.52
4,644,386
-2.7
I
10b
3/13/26 - 4:35:44 pm
31
1y
22
100%
-59%
1
KERSTEN DIRK
DIR
AS
$13,149,314
688,788
3/9/26
3/10/26
$17.72
$19.80
4,774,058
-12.6
I
10b
3/11/26 - 5:27:17 pm
32
3m
3
67%
4%
6
POSNER BRIAN S
DIR
B
$45,180
3,000
---
3/6/26
---
$15.06
11,500
35.3
D
---
3/10/26 - 5:33:53 pm
33
1y
2
0%
33%
2
FRIEDL NADERER JOHANNA
O
AS
$2,205
148
---
3/5/26
---
$14.90
154,581
-0.1
D
10b
3/6/26 - 4:10:20 pm
34
1y
2
0%
18%
2
KERR DOUGLAS
O
AS
$13,470
904
---
3/5/26
---
$14.90
171,606
-0.5
D
10b
3/6/26 - 4:09:00 pm
35
1y
2
0%
18%
3
COX JOHN
CEO,PR,DIR
AS
$40,707
2,732
---
3/5/26
---
$14.90
374,145
-0.7
D
10b
3/6/26 - 4:08:22 pm
36
    
 
COX JOHN
CEO,PR,DIR
JB
---
180,000
---
2/12/26
---
---
376,877
91.4
D
R
2/17/26 - 5:11:53 pm
37
    
 
KERR DOUGLAS
O
JB
---
85,000
---
2/12/26
---
---
172,510
97.1
D
R
2/17/26 - 5:10:59 pm
38
    
 
FRIEDL NADERER JOHANNA
O
JB
---
60,000
---
2/12/26
---
---
154,729
63.3
D
R
2/17/26 - 5:09:42 pm
39
    
 
LUCERA ERICK
CFO
JB
---
65,000
---
2/12/26
---
---
131,100
98.3
D
R
2/17/26 - 5:08:46 pm
40
    
 
KARNANI VIKRAM
DIR
3
---
---
---
12/22/25
---
---
---
---
---
---
12/23/25 - 4:05:04 pm
41
1y
2
0%
18%
3
COX JOHN
CEO,PR,DIR
AS
$55,157
2,662
---
12/5/25
---
$20.72
196,877
-1.3
D
10b
12/5/25 - 4:11:49 pm
42
1y
2
0%
18%
2
KERR DOUGLAS
O
AS
$18,234
880
---
12/5/25
---
$20.72
87,510
-1.0
D
10b
12/5/25 - 4:09:18 pm
43
1y
2
0%
33%
2
FRIEDL NADERER JOHANNA
O
AS
$2,984
144
---
12/5/25
---
$20.72
94,729
-0.2
D
10b
12/5/25 - 4:08:40 pm
44
    
 
POSNER BRIAN S
DIR
3
---
---
---
10/1/25
---
---
8,500
---
D
---
10/2/25 - 4:13:03 pm
45
1y
2
0%
18%
3
COX JOHN
CEO,PR,DIR
AS
$35,402
2,640
---
9/5/25
---
$13.41
199,539
-1.3
D
10b
9/9/25 - 4:31:26 pm
46
1y
2
0%
33%
2
FRIEDL NADERER JOHANNA
O
AS
$13,794
1,038
9/4/25
9/5/25
$13.27
$13.41
94,873
-1.1
D
10b
9/8/25 - 4:06:22 pm
47
1y
2
0%
18%
2
KERR DOUGLAS
O
AS
$58,842
4,425
9/4/25
9/5/25
$13.27
$13.41
88,390
-4.8
D
10b
9/8/25 - 4:03:26 pm
48
    
 
COX JOHN
CEO,PR,DIR
JS
---
40,000
---
7/15/25
---
---
202,179
-16.5
D
R
7/15/25 - 5:11:40 pm
49
1y
2
50%
64%
3
COX JOHN
CEO,PR,DIR
B
$911,000
100,000
---
7/14/25
---
$9.11
242,179
70.3
D
R
7/15/25 - 5:11:40 pm
50
1y
2
0%
18%
3
COX JOHN
CEO,PR,DIR
AS
$54,201
4,060
---
6/5/25
---
$13.35
142,179
-2.8
D
10b
6/6/25 - 4:07:07 pm
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