(CTMX) Stock Institutional Trading Activity


(CTMX) position changes reported by tracked institutional filers across multiple SEC 13F reporting periods. Based on recent SEC 13F filings (Q3 2025), investors with some of the largest reported share count changes include Renaissance Technologies LLC. 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
Q3 2025Renaissance Technologies LLCBuy683,0602,545,260$8,119,379
Q2 2025Renaissance Technologies LLCBuy706,2001,862,200$4,227,194
Q1 2025Renaissance Technologies LLCSell-190,8001,156,000$734,985
Q4 2024Renaissance Technologies LLCBuy331,8001,346,800$1,387,204
Q3 2024Renaissance Technologies LLCSell-168,0221,015,000$1,197,700
Q2 2024Renaissance Technologies LLCSell-49,7781,183,022$1,443,287
Q1 2024Renaissance Technologies LLCSell-92,9001,232,800$2,688
Q4 2023Renaissance Technologies LLCBuy395,6001,325,700$2,055
Q3 2023Renaissance Technologies LLCSell-192,300930,100$1,200
Q2 2023Renaissance Technologies LLCBuy272,1001,122,400$1,931
Q1 2023Renaissance Technologies LLCSell-490,474850,300$1,284
Q4 2022Renaissance Technologies LLCSell-464,8261,340,774$2,145
Q3 2022Renaissance Technologies LLCBuy351,3391,805,600$2,618
Q2 2022Renaissance Technologies LLCBuy558,3611,454,261$2,661
Q1 2022Renaissance Technologies LLCBuy390,400895,900$2,392
Q4 2021Renaissance Technologies LLCSell-389,100505,500$2,189
Q3 2021Renaissance Technologies LLCSell-131,600894,600$4,554
Q2 2021Renaissance Technologies LLCSell-426,3681,026,200$6,496
Q1 2021Renaissance Technologies LLCSell-611,9321,452,568$11,228
Q4 2020Renaissance Technologies LLCSell-240,1002,064,500$13,522
Q3 2020Renaissance Technologies LLCSell-46,0712,304,600$15,326
Q2 2020Renaissance Technologies LLCBuy142,6712,350,671$19,581
Q1 2020Renaissance Technologies LLCBuy144,7292,208,000$16,935
Q4 2019Renaissance Technologies LLCBuy530,9712,063,271$17,146
Q3 2019Renaissance Technologies LLCBuy125,3001,532,300$11,308
Q2 2019Renaissance Technologies LLCBuy116,4001,407,000$15,787
Q1 2019Renaissance Technologies LLCSell-27,2001,290,600$13,874
Q4 2018Renaissance Technologies LLCSell-202,7001,317,800$19,899
Q3 2018Renaissance Technologies LLCBuy559,3001,520,500$28,129
Q1 2018Renaissance Technologies LLCBuy246,100961,200$27,346

Frequently asked questions about CTMX activity

  • Which institutional owners are buying CTMX?

    Institutional owners buying CTMX 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 CTMX activity?

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

  • Is institutional interest in CTMX increasing?

    Institutional interest in CTMX 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.