RYTM — RHYTHM PHARMACEUTICALS INC

Ownership history in Caption Management, LLC  ·  20 quarters on record

This page tracks every 13F SEC filing in which Caption Management, LLC reported a position in RHYTHM PHARMACEUTICALS INC (RYTM). Data includes quarterly share count, position size as % of portfolio, estimated market value, and end-of-quarter stock price — sourced directly from SEC EDGAR 13F filings.

Peak position
0.29% (2023 Q4)
Avg. % of fund
0.06%
First filed
2020 Q3
Last filed
2025 Q4
Quarters held
20
Quarter Action Shares Change Chg % % of Fund Mkt Value Price (EOQ)
2025 Q4 REDUCED 4,614 -45,486 -90.8% 0.00% $494K $107.04
2025 Q3 ADDED 50,100 +27,600 +122.7% 0.04% $5.1M $100.99
2025 Q3 ADDED 22,500 +14,960 +198.4% 0.02% $2.3M $100.99
2025 Q2 REDUCED 7,540 -117,460 -94.0% 0.01% $476K $63.19
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% of Fund (quarterly)    RYTM price (monthly, adj. close)

Other funds also holding RYTM

As of 2025 Q4 — sorted by position size

Checkpoint Capital L.P. 33.18% NEA Management Company, LLC 3Y 7Y 15.88% RA CAPITAL MANAGEMENT, L.P. 3Y 7Y 7.31% PERCEPTIVE ADVISORS LLC 3Y 7Y 4.86% Nan Fung Group Holdings Ltd 3Y 4.71% Opaleye Management Inc. 3Y 7Y 4.66% Sio Capital Management, LLC 3Y 7Y 4.47% Rock Springs Capital Management LP 3Y 7Y 3.81% BAKER BROS. ADVISORS LP 3Y 7Y 3.51% Integral Health Asset Management, LLC 3Y 2.52%
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