CSP INC (CSPI) Stock Institutional Trading Activity


CSP INC (CSPI) 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 Ariel Appreciation Fund. 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-20,400286,126$3,576,575
Q3 2025Renaissance Technologies LLCBuy3,000306,526$3,540,375
Q2 2025Renaissance Technologies LLCSell-700303,526$3,927,626
Q1 2025Renaissance Technologies LLCSell-35,121304,226$4,666,827
Q4 2024Renaissance Technologies LLCSell-54,579339,347$5,453,306
Q3 2024Renaissance Technologies LLCSell-48,300393,926$5,117,099
Q2 2024Renaissance Technologies LLCBuy15,800442,226$6,589,167
Q1 2024Renaissance Technologies LLCBuy264,063426,426$7,872
Q4 2023Renaissance Technologies LLCSell-7,700162,363$3,164
Q3 2023Renaissance Technologies LLCBuy8,800170,063$2,976
Q2 2023Renaissance Technologies LLCSell-1,700161,263$1,921
Q1 2023Renaissance Technologies LLCBuy3,900162,963$2,215
Q4 2022Renaissance Technologies LLCSell-11,114159,063$1,500
Q3 2022Renaissance Technologies LLCSell-16,911170,177$1,224
Q2 2022Renaissance Technologies LLCSell-300187,088$1,703
Q1 2022Renaissance Technologies LLCSell-19,200187,388$1,477
Q4 2021Renaissance Technologies LLCSell-6,555206,588$1,816
Q3 2021Renaissance Technologies LLCSell-11,145213,143$1,903
Q2 2021Renaissance Technologies LLCSell-11,766224,288$2,368
Q1 2021Renaissance Technologies LLCBuy7,200236,054$2,054
Q4 2020Renaissance Technologies LLCBuy6,300228,854$1,769
Q3 2020Renaissance Technologies LLCSell-9,048222,554$1,921
Q2 2020Renaissance Technologies LLCSell-12,815231,602$1,915
Q1 2020Renaissance Technologies LLCSell-6,833244,417$1,708
Q4 2019Renaissance Technologies LLCSell-3,500251,250$3,279
Q2 2019Renaissance Technologies LLCSell-3,000254,750$3,885
Q1 2019Renaissance Technologies LLCSell-1,695257,750$2,874
Q4 2018Renaissance Technologies LLCSell-5,955259,445$2,545
Q3 2018Renaissance Technologies LLCSell-3,600265,400$3,482
Q1 2018Renaissance Technologies LLCBuy15,110269,000$2,892

Frequently asked questions about CSPI activity

  • Which institutional owners are buying CSPI?

    Institutional owners buying CSPI 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 CSPI activity?

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

  • Is institutional interest in CSPI increasing?

    Institutional interest in CSPI 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.