CATALYST PHARMACEUTICALS INC (CPRX) Stock Institutional Trading Activity


CATALYST PHARMACEUTICALS INC (CPRX) position changes reported by tracked institutional filers across multiple SEC 13F reporting periods. Based on recent SEC 13F filings (Q4 2025), investors with some of the largest reported share count changes include Renaissance Technologies LLC and Fundsmith. Explore insights into buying and selling patterns, position changes, and investment conviction levels to understand institutional trading behavior and market dynamics.

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Portfolio quarterNameTypeQuantityRemainingReported stock balance
Q4 2025Renaissance Technologies LLCSell-894,7532,650,077$61,852,797
Q3 2025FundsmithBuy654,7213,363,807$66,266,998
Q3 2025Renaissance Technologies LLCBuy293,3143,544,830$69,833,151
Q2 2025FundsmithBuy557,8122,709,086$58,787,166
Q2 2025Renaissance Technologies LLCBuy295,2003,251,516$70,557,897
Q1 2025FundsmithBuy2,151,2742,151,274$52,168,395
Q1 2025Renaissance Technologies LLCBuy250,2002,956,316$71,690,663
Q4 2024Renaissance Technologies LLCBuy180,1002,706,116$56,476,641
Q3 2024Renaissance Technologies LLCBuy350,2892,526,016$50,217,198
Q2 2024Renaissance Technologies LLCBuy287,3002,175,727$33,702,011
Q1 2024Renaissance Technologies LLCBuy291,0001,888,427$30,102
Q4 2023Renaissance Technologies LLCBuy308,3271,597,427$26,853
Q3 2023Renaissance Technologies LLCBuy134,2001,289,100$15,070
Q2 2023Renaissance Technologies LLCBuy64,8001,154,900$15,522
Q1 2023Renaissance Technologies LLCSell-141,4121,090,100$18,074
Q4 2022Renaissance Technologies LLCSell-995,0001,231,512$22,906
Q3 2022Renaissance Technologies LLCBuy1,194,9002,226,512$28,566
Q2 2022Renaissance Technologies LLCBuy678,5001,031,612$7,232
Q1 2022Renaissance Technologies LLCSell-69,774353,112$2,927
Q4 2021Renaissance Technologies LLCBuy370,648422,886$2,863
Q3 2021Renaissance Technologies LLCSell-686,98852,238$277
Q1 2020Renaissance Technologies LLCBuy563,526739,226$2,846
Q4 2019Renaissance Technologies LLCBuy22,978175,700$659
Q3 2018Renaissance Technologies LLCSell-1,236,778152,722$577
Q1 2018Renaissance Technologies LLCBuy275,4001,389,500$3,321
Q4 2017Renaissance Technologies LLCBuy532,5001,114,100$4,356
Q3 2017Renaissance Technologies LLCSell-310,200581,600$1,466
Q2 2017Renaissance Technologies LLCBuy509,400891,800$2,461
Q1 2017Renaissance Technologies LLCBuy367,400382,400$746
Q3 2016Renaissance Technologies LLCSell-160,80015,000$16

Frequently asked questions about CPRX activity

  • Which institutional owners are buying CPRX?

    Institutional owners buying CPRX 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 CPRX activity?

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

  • Is institutional interest in CPRX increasing?

    Institutional interest in CPRX 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.