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RTW Investments’s Dyne Therapeutics DYN Stock Holding History

RTW Investments’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
2025
Q4 		– Sell
-2,890,567
Closed -$36.6M – 97
2025
Q3 		$36.6M Buy
2,890,567
+1,200,000
+71% +$13.7M 0.45% 46
2025
Q2 		$16.1M Hold
1,690,567
– – 0.23% 54
2025
Q1 		$17.7M Sell
1,690,567
-3,528,074
-68% -$50.5M 0.27% 47
2024
Q4 		$123M Sell
5,218,641
-1,600,000
-23% -$47.3M 1.86% 21
2024
Q3 		$245M Buy
6,818,641
+431,503
+7% +$17.2M 3.54% 8
2024
Q2 		$225M Buy
6,387,138
+3,295,551
+107% +$95.8M 3.49% 10
2024
Q1 		$87.8M Buy
+3,091,587
New +$69.9M 1.3% 28

Other funds holding DYN

T. Rowe Price Investment Management
T. Rowe Price Investment Management Baltimore, Maryland $145B AUM 22.78% 1-Year Est. Return
Janus Henderson Group
Janus Henderson Group London, United Kingdom $209B AUM 37.72% 1-Year Est. Return
Vanguard Group
Vanguard Group Malvern, Pennsylvania $6.9T AUM 27.45% 1-Year Est. Return
BlackRock
BlackRock New York $5.72T AUM 30.48% 1-Year Est. Return
AVLSA
Atlas Venture Life Science Advisors Cambridge, Massachusetts $790M AUM 223.66% 1-Year Est. Return
State Street
State Street Boston, Massachusetts $2.9T AUM 29.55% 1-Year Est. Return
Fidelity Investments
Fidelity Investments Boston, Massachusetts $1.9T AUM 41.92% 1-Year Est. Return
FIS
FCPM III Services Naarden, Netherlands $722M AUM 73.61% 1-Year Est. Return
Adage Capital Partners
Adage Capital Partners Boston, Massachusetts $64.8B AUM 42.7% 1-Year Est. Return
OAG
Orbis Allan Gray Hamilton, Bermuda $23.7B AUM 65.43% 1-Year Est. Return

RTW Investments's DYN Position: Q4 2025 in Review

RTW Investments sold out of Dyne Therapeutics (DYN) in Q4 2025, closing a stake of 2,890,567 shares — an estimated $36.6M sold.

RTW Investments first reported a position in DYN in Q1 2024 and held it in 7 quarters. The position peaked at $245M in Q3 2024. 232 funds tracked by Wall St. Rank hold DYN as of Q4 2025.

  • RTW Investments reported no remaining Dyne Therapeutics position as of Q4 2025 after selling out during the quarter.
  • RTW Investments sold 2,890,567 Dyne Therapeutics shares in Q4 2025, an estimated $36.6M.
  • RTW Investments first reported a position in Dyne Therapeutics in Q1 2024 and held it in 7 quarters.
  • RTW Investments's Dyne Therapeutics position peaked at $245M in Q3 2024.
  • 232 funds tracked by Wall St. Rank held Dyne Therapeutics as of Q4 2025.

Based on RTW Investments's 13F filing for Q4 2025, filed 17 Feb 2026.