CALIX INC (CALX) Stock Institutional Trading Activity


CALIX INC (CALX) 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. 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 LLCBuy202,800463,618$24,539,301
Q3 2025Renaissance Technologies LLCBuy23,200260,818$16,006,401
Q2 2025Renaissance Technologies LLCBuy132,300237,618$12,638,901
Q1 2025Renaissance Technologies LLCSell-55,101105,318$3,732,470
Q4 2024Renaissance Technologies LLCSell-43,499160,419$5,593,811
Q3 2024Renaissance Technologies LLCBuy125,400203,918$7,909,979
Q2 2024Renaissance Technologies LLCBuy46,30078,518$2,781,893
Q1 2024Renaissance Technologies LLCBuy7,51832,218$1,068
Q4 2023Renaissance Technologies LLCSell-127,05324,700$1,079
Q3 2023Renaissance Technologies LLCSell-473,000151,753$6,956
Q2 2023Renaissance Technologies LLCSell-225,900624,753$31,181
Q1 2023Renaissance Technologies LLCBuy175,218850,653$45,586
Q4 2022Renaissance Technologies LLCSell-122,265675,435$46,220
Q3 2022Renaissance Technologies LLCSell-346,123797,700$48,771
Q2 2022Renaissance Technologies LLCSell-303,8951,143,823$39,050
Q1 2022Renaissance Technologies LLCBuy22,3911,447,718$62,122
Q4 2021Renaissance Technologies LLCSell-303,2911,425,327$113,983
Q3 2021Renaissance Technologies LLCSell-339,8001,728,618$85,446
Q2 2021Renaissance Technologies LLCSell-332,8002,068,418$98,250
Q1 2021Renaissance Technologies LLCSell-568,3002,401,218$83,226
Q4 2020Renaissance Technologies LLCBuy262,3182,969,518$88,373
Q3 2020Renaissance Technologies LLCSell-147,9002,707,200$48,134
Q2 2020Renaissance Technologies LLCSell-149,1182,855,100$42,541
Q1 2020Renaissance Technologies LLCBuy289,7003,004,218$21,270
Q4 2019Renaissance Technologies LLCSell-84,4002,714,518$21,716
Q3 2019Renaissance Technologies LLCSell-221,8002,798,918$17,885
Q2 2019Renaissance Technologies LLCBuy37,9003,020,718$19,816
Q1 2019Renaissance Technologies LLCBuy76,9002,982,818$22,968
Q4 2018Renaissance Technologies LLCBuy195,0182,905,918$28,333
Q3 2018Renaissance Technologies LLCSell-14,8002,710,900$21,958

Frequently asked questions about CALX activity

  • Which institutional owners are buying CALX?

    Institutional owners buying CALX 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 CALX activity?

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

  • Is institutional interest in CALX increasing?

    Institutional interest in CALX 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.