SEC 13F Intelligence

Rock Springs Capital Management LP / DYN

Rock Springs Capital Management LP’s Dyne Therapeutics Inc Position

Does Rock Springs Capital Management LP own Dyne Therapeutics Inc (DYN)? Yes — 972.2K shares worth $18M (+1.04% of its 13F portfolio) as of Q1 2026, up from 913.0K shares the prior filed quarter.

Position Value
$18M
Q1 2026
Shares
972.2K
% of Portfolio
+1.04%
Quarters Held
9
currently held

Position History DYN

Reported value by quarter
Q1 ’24: $13MQ1 ’24Q2 ’24: $16MQ3 ’24: $17MQ3 ’24Q4 ’24: $11MQ1 ’25: $5MQ1 ’25Q2 ’25: $6MQ3 ’25: $10MQ3 ’25Q4 ’25: $18MQ1 ’26: $18MQ1 ’26filingsflow.com
QuarterSharesValue% of Portfolio
Q1 2026972.2K$18M+1.04%
Q4 2025913.0K$18M+0.92%
Q3 2025824.1K$10M+0.61%
Q2 2025581.0K$6M+0.34%
Q1 2025524.5K$5M+0.31%
Q4 2024474.5K$11M+0.43%
Q3 2024461.0K$17M+0.54%
Q2 2024461.0K$16M+0.49%
Q1 2024451.8K$13M+0.33%

Common-stock position only; options are excluded. Quarters where the fund filed no 13F or reported no position are absent. See Rock Springs Capital Management LP’s full portfolio or all institutional holders of DYN.