SL
DYN icon

Siren LLC’s Dyne Therapeutics DYN Stock Holding History

Siren LLC’s Portfolio DYN Stock Details DYN Fund Activity
Bought
Maintained
Sold
Quarter Market Value Status Shares Change in
Stake 		Trade Value Portfolio Weight Portfolio Position
2026
Q2 		$47.3M Sell
2,129,125
-100,000
-4% -$1.86M 0.96% 32
2026
Q1 		$40.4M Sell
2,229,125
-1,273,816
-36% -$22M 1.12% 26
2025
Q4 		$68.5M Sell
3,502,941
-1,226,233
-26% -$23.2M 2.04% 16
2025
Q3 		$59.8M Sell
4,729,174
-107,263
-2% -$1.22M 2.34% 10
2025
Q2 		$46M Buy
4,836,437
+2,118,450
+78% +$23.3M 2.38% 7
2025
Q1 		$28.4M Buy
2,717,987
+1,370,531
+102% +$19.6M 1.6% 19
2024
Q4 		$31.7M Buy
1,347,456
+212,792
+19% +$6.29M 1.4% 22
2024
Q3 		$40.8M Buy
+1,134,664
New +$45.2M 2.04% 17

Other funds holding DYN

T. Rowe Price Investment Management
T. Rowe Price Investment Management Baltimore, Maryland $153B AUM 38.14% 1-Year Est. Return
BlackRock
BlackRock New York $6.73T AUM 46.02% 1-Year Est. Return
JT
Jupiter Topco New York $245B AUM
Fidelity Investments
Fidelity Investments Boston, Massachusetts $2.3T AUM 54.33% 1-Year Est. Return
State Street
State Street Boston, Massachusetts $3.37T AUM 44.26% 1-Year Est. Return
OAG
Orbis Allan Gray Hamilton, Bermuda $29.1B AUM 60.8% 1-Year Est. Return
AVLSA
Atlas Venture Life Science Advisors Cambridge, Massachusetts $881M AUM 160.77% 1-Year Est. Return
Vanguard Capital Management
Vanguard Capital Management Malvern, Pennsylvania $4.68T AUM
TCM
TCG Crossover Management Palo Alto, California $4.16B AUM 983.43% 1-Year Est. Return
Vanguard Portfolio Management
Vanguard Portfolio Management Malvern, Pennsylvania $2.22T AUM

Siren LLC's DYN Position: Q2 2026 in Review

Siren LLC reduced its Dyne Therapeutics (DYN) stake by 4.5% in Q2 2026, selling an estimated $1.86M and leaving 2,129,125 shares worth $47.3M. The position accounts for 0.96% of the portfolio, ranked #32.

Siren LLC first reported a position in DYN in Q3 2024 and has held it in 8 quarters since. The position peaked at $68.5M in Q4 2025. 246 funds tracked by Wall St. Rank hold DYN as of Q2 2026.

  • Siren LLC held 2,129,125 shares of Dyne Therapeutics worth $47.3M as of Q2 2026.
  • Siren LLC sold 100,000 Dyne Therapeutics shares in Q2 2026, an estimated $1.86M.
  • Dyne Therapeutics made up 0.96% of Siren LLC's portfolio in Q2 2026, its #32 holding.
  • Siren LLC first reported a position in Dyne Therapeutics in Q3 2024 and has held it in 8 quarters since.
  • Siren LLC's Dyne Therapeutics position peaked at $68.5M in Q4 2025.
  • 246 funds tracked by Wall St. Rank held Dyne Therapeutics as of Q2 2026.

Based on Siren LLC's 13F filing for Q2 2026, filed 13 Aug 2026.