WALTHAM, MA
DYNE THERAPEUTICS, INC.DYN— Latest position per institution from SEC 13F filings
15
Institutional holders
166.02M
Total shares held
2.80B
Estimated value
8.30M
Avg. position size
T. ROWE PRICE INVESTMENT MANAGEMENT, INC.
CIK 1897612
Shares
30.91M
Value
686.56K
Filed
Jun 30, 2026
JANUS HENDERSON GROUP LTD.
CIK 1274173
Shares
13.65M
Value
247.43M
Filed
Mar 31, 2026
BLACKROCK, INC.
CIK 2012383
Shares
12.40M
Value
275.50M
Filed
Jun 30, 2026
JUPITER TOPCO LLC
CIK 2146052
Shares
12M
Value
266.63M
Filed
Jun 30, 2026
VANGUARD GROUP INC
CIK 102909
Shares
11.22M
Value
219.38M
Filed
Dec 31, 2025
FMR LLC
CIK 315066
Shares
11.21M
Value
248.91M
Filed
Jun 30, 2026
RA CAPITAL MANAGEMENT, L.P.
CIK 1346824
Shares
9.71M
Value
92.48M
Filed
Jun 30, 2025
STATE STREET CORP
CIK 93751
Shares
7.46M
Value
165.65M
Filed
Jun 30, 2026
BLACKROCK FINANCE, INC.
CIK 1364742
Shares
7.39M
Value
260.69M
Filed
Jun 30, 2024
ORBIS ALLAN GRAY LTD
CIK 1663865
Shares
7.01M
Value
155.62M
Filed
Jun 30, 2026
ATLAS VENTURE LIFE SCIENCE ADVISORS, LLC
CIK 1917529
Shares
6.80M
Value
151.03M
Filed
Jun 30, 2026
VANGUARD CAPITAL MANAGEMENT LLC
CIK 2100119
Shares
6.31M
Value
140.17M
Filed
Jun 30, 2026
TCG CROSSOVER MANAGEMENT, LLC
CIK 1839948
Shares
4.62M
Value
102.50M
Filed
Jun 30, 2026
VANGUARD PORTFOLIO MANAGEMENT LLC
CIK 2100121
Shares
4.05M
Value
89.92M
Filed
Jun 30, 2026
PRICE T ROWE ASSOCIATES INC /MD/
CIK 80255
Shares
3.94M
Value
87.44K
Filed
Jun 30, 2026
FCPM III SERVICES B.V.
CIK 2013410
Shares
3.85M
Value
85.47M
Filed
Jun 30, 2026
GEODE CAPITAL MANAGEMENT, LLC
CIK 1214717
Shares
3.74M
Value
83.16M
Filed
Jun 30, 2026
VESTAL POINT CAPITAL, LP
CIK 1974915
Shares
3.38M
Value
74.96M
Filed
Jun 30, 2026
ORBIMED ADVISORS LLC
CIK 1055951
Shares
3.24M
Value
71.86M
Filed
Jun 30, 2026
FRAZIER LIFE SCIENCES MANAGEMENT, L.P.
CIK 1892134
Shares
3.15M
Value
70.03M
Filed
Jun 30, 2026
| # | Institution | CIK | Shares | Est. Value | Period |
|---|---|---|---|---|---|
| 1 | T. ROWE PRICE INVESTMENT MANAGEMENT, INC. | 1897612 | 30.91M | 686.56K | Jun 30, 2026 |
| 2 | JANUS HENDERSON GROUP LTD. | 1274173 | 13.65M | 247.43M | Mar 31, 2026 |
| 3 | BLACKROCK, INC. | 2012383 | 12.40M | 275.50M | Jun 30, 2026 |
| 4 | JUPITER TOPCO LLC | 2146052 | 12M | 266.63M | Jun 30, 2026 |
| 5 | VANGUARD GROUP INC | 102909 | 11.22M | 219.38M | Dec 31, 2025 |
| 6 | FMR LLC | 315066 | 11.21M | 248.91M | Jun 30, 2026 |
| 7 | RA CAPITAL MANAGEMENT, L.P. | 1346824 | 9.71M | 92.48M | Jun 30, 2025 |
| 8 | STATE STREET CORP | 93751 | 7.46M | 165.65M | Jun 30, 2026 |
| 9 | BLACKROCK FINANCE, INC. | 1364742 | 7.39M | 260.69M | Jun 30, 2024 |
| 10 | ORBIS ALLAN GRAY LTD | 1663865 | 7.01M | 155.62M | Jun 30, 2026 |
| 11 | ATLAS VENTURE LIFE SCIENCE ADVISORS, LLC | 1917529 | 6.80M | 151.03M | Jun 30, 2026 |
| 12 | VANGUARD CAPITAL MANAGEMENT LLC | 2100119 | 6.31M | 140.17M | Jun 30, 2026 |
| 13 | TCG CROSSOVER MANAGEMENT, LLC | 1839948 | 4.62M | 102.50M | Jun 30, 2026 |
| 14 | VANGUARD PORTFOLIO MANAGEMENT LLC | 2100121 | 4.05M | 89.92M | Jun 30, 2026 |
| 15 | PRICE T ROWE ASSOCIATES INC /MD/ | 80255 | 3.94M | 87.44K | Jun 30, 2026 |
| 16 | FCPM III SERVICES B.V. | 2013410 | 3.85M | 85.47M | Jun 30, 2026 |
| 17 | GEODE CAPITAL MANAGEMENT, LLC | 1214717 | 3.74M | 83.16M | Jun 30, 2026 |
| 18 | VESTAL POINT CAPITAL, LP | 1974915 | 3.38M | 74.96M | Jun 30, 2026 |
| 19 | ORBIMED ADVISORS LLC | 1055951 | 3.24M | 71.86M | Jun 30, 2026 |
| 20 | FRAZIER LIFE SCIENCES MANAGEMENT, L.P. | 1892134 | 3.15M | 70.03M | Jun 30, 2026 |
Data sourced from SEC Form 13F institutional holdings reports. Positions reflect the most recent filing per institution.