DYN
DYNE THERAPEUTCS (DYN)
NASDAQ
$20.55-$0.32 (-1.54%)
Price as of Jun 23, 2026 2:47 PM EDT
  • $3.5B
    Market Cap
  • 105.41%
    1-Year Change
  • Biotechnology
    Industry

Top Holders

Institutional
Mutual Funds
Holder
Ownership %
Shares Held
Change (Shares, %)
Report Date
T. ROWE PRICE INVESTMENT MANAGEMENT, INC.
18.62%
30.8M
+13.2M (+43.03%)
Mar 31, 2026
JANUS HENDERSON GROUP PLC
8.26%
13.6M
-240,346 (-1.76%)
Mar 31, 2026
BLACKROCK, INC.
7.08%
11.7M
+509,032 (+4.35%)
Mar 31, 2026
VANGUARD GROUP INC
6.78%
11.2M
+1.5M (+12.97%)
Dec 31, 2025
RA CAPITAL MANAGEMENT, L.P.
5.88%
9.7M
0 (0.00%)
Jun 30, 2025
ATLAS VENTURE LIFE SCIENCE ADVISORS, LLC
5.52%
9.1M
0 (0.00%)
Mar 31, 2026
FMR LLC
5.39%
8.9M
+2.3M (+26.26%)
Mar 31, 2026

Current Ownership Distribution

  • Institutions1.7B (83.56%)
  • Mutual Funds309.0M (15.23%)
  • Insiders24.4M (1.20%)
  • Other0 (0.00%)

Insider Transactions

  • 1.20% (24.4M)
    Current InsiderOwnership (%, shares)
  • 2
    Number of InsiderBuying (last 12 months)
  • $1.9M
    Amount of InsiderBuying (last 12 months)
  • 5
    Number of InsiderSelling (last 12 months)
  • $644.4M
    Amount of InsiderSelling (last 12 months)
Insider Name & Title
Type
Date
Transaction Value
Shares
Share Price
Shares After Transactions
Kersten Dirk
Sell
Jun 18, 2026
$941,373.42
46,901
$20.07
4.1M
Kersten Dirk
Sell
Jun 17, 2026
$754,316.07
37,454
$20.14
4.2M
Friedl-Naderer Johanna
Chief Commercial Officer
Sell
Jun 16, 2026
$2,657.85
145
$18.33
154,208
Lucera Erick
Chief Financial Officer
Sell
Apr 01, 2026
$106,751.28
5,727
$18.64
125,373
Posner Brian S
Buy
Mar 30, 2026
$34,160.00
2,000
$17.08
15,500
Posner Brian S
Buy
Mar 11, 2026
$38,700.00
2,000
$19.35
13,500
Kersten Dirk
Sell
Mar 11, 2026
$2.5M
129,672
$19.52
4.6M
Kersten Dirk
Sell
Mar 10, 2026
$172,687.13
9,482
$18.21
5.3M
Kersten Dirk
Sell
Mar 10, 2026
$4.2M
219,758
$19.32
5.1M
Kersten Dirk
Sell
Mar 10, 2026
$5.6M
281,858
$19.80
4.8M
Kersten Dirk
Sell
Mar 09, 2026
$3.1M
177,690
$17.72
5.3M
Posner Brian S
Buy
Mar 06, 2026
$45,180.00
3,000
$15.06
11,500
Cox John
CEO & President
Sell
Mar 05, 2026
$40,706.80
2,732
$14.90
374,145
Friedl-Naderer Johanna
Chief Commercial Officer
Sell
Mar 05, 2026
$2,205.20
148
$14.90
154,581
Kerr Douglas
Chief Medical Officer
Sell
Mar 05, 2026
$13,469.60
904
$14.90
171,606
Friedl-Naderer Johanna
Chief Commercial Officer
Award
Feb 12, 2026
$0.00
90,000
$0.00
90,000
Kerr Douglas
Chief Medical Officer
Award
Feb 12, 2026
$0.00
130,000
$0.00
130,000
Friedl-Naderer Johanna
Chief Commercial Officer
Award
Feb 12, 2026
$0.00
60,000
$0.00
154,729
Kerr Douglas
Chief Medical Officer
Award
Feb 12, 2026
$0.00
85,000
$0.00
172,510
Cox John
CEO & President
Award
Feb 12, 2026
$0.00
285,000
$0.00
285,000
Cox John
CEO & President
Award
Feb 12, 2026
$0.00
180,000
$0.00
376,877
Posner Brian S
Award
Oct 01, 2025
$0.00
70,000
$0.00
70,000
Cox John
CEO & President
Sell
Sep 05, 2025
$35,402.40
2,640
$13.41
199,539
Kerr Douglas
Chief Medical Officer
Sell
Sep 05, 2025
$11,706.93
873
$13.41
88,390
Friedl-Naderer Johanna
Chief Commercial Officer
Sell
Sep 05, 2025
$1,931.04
144
$13.41
94,873
Friedl-Naderer Johanna
Chief Commercial Officer
Sell
Sep 04, 2025
$11,863.38
894
$13.27
95,017
Kerr Douglas
Chief Medical Officer
Sell
Sep 04, 2025
$47,135.04
3,552
$13.27
89,263
Cox John
CEO & President
Award
Jul 16, 2025
$0.00
197,285
$0.00
197,285
Friedl-Naderer Johanna
Chief Commercial Officer
Award
Jul 16, 2025
$0.00
51,255
$0.00
51,255
Kerr Douglas
Chief Medical Officer
Award
Jul 16, 2025
$0.00
65,110
$0.00
65,110