RHYTHM PHARMACEUTICALS INC (RYTM) Institutional Ownership Changes & 13F Activity

RHYTHM PHARMACEUTICALS INC (RYTM) institutional ownership data tracks hedge funds, asset managers, and other institutional investors based on recent SEC 13F filings (Q1 2026). This page analyzes institutional buying and selling activity, new holdings, and sold-out positions among tracked filers. Notable filers include Renaissance Technologies LLC.

Portfolio quarterNameTypeQuantityRemainingReported stock balance
Q1 2026Renaissance Technologies LLCSell-83,182258,011$22,439,217
Q4 2025Renaissance Technologies LLCSell-205,400341,193$36,521,299
Q3 2025Renaissance Technologies LLCBuy231,700546,593$55,200,427
Q2 2025Renaissance Technologies LLCBuy300,781314,893$19,898,089
Q1 2025Renaissance Technologies LLCSell-8,98814,112$747,513
Q1 2022Renaissance Technologies LLCSell-29,10023,100$266
Q2 2021Renaissance Technologies LLCBuy3,20052,200$1,022
Q1 2021Renaissance Technologies LLCBuy39,00049,000$1,042
Q4 2020Renaissance Technologies LLCSell-187,00010,000$297
Q3 2020Renaissance Technologies LLCSell-38,900197,000$4,269
Q2 2020Renaissance Technologies LLCBuy141,200235,900$5,261
Q1 2020Renaissance Technologies LLCBuy49,05394,700$1,441
Q4 2019Renaissance Technologies LLCBuy34,94745,647$1,048
Q3 2019Renaissance Technologies LLCBuy10,70010,700$231

Frequently asked questions about RYTM activity

  • Which institutional owners are buying RYTM?

    Institutional owners buying RYTM include investors who have either initiated new positions or increased their existing holdings based on recent SEC 13F filings. The activity table above highlights which funds added shares in the latest reporting periods and how their positions changed over time.

  • What does "buy" mean in RYTM activity?

    "Buy" means an investor increased their reported position in RYTM compared to the prior reporting period. This reflects growing exposure to RHYTHM PHARMACEUTICALS INC (RYTM) rather than necessarily a brand-new position (though new positions also appear as buys when prior quantity was zero).

  • Is institutional interest in RYTM increasing?

    Institutional interest in RYTM can be assessed by comparing the number of tracked funds adding or increasing positions versus those trimming or exiting across the periods shown. A higher number of additions typically signals increasing participation among large filers, but it should be read alongside position sizes and the full table.

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