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 2017Renaissance Technologies LLCBuy5,083253,890$4,015
Q3 2017Renaissance Technologies LLCSell-393248,807$2,749
Q2 2017Renaissance Technologies LLCSell-2,100249,200$2,686
Q1 2017Renaissance Technologies LLCBuy8,000251,300$2,619
Q4 2016Renaissance Technologies LLCBuy37,100243,300$2,574
Q3 2016Renaissance Technologies LLCBuy39,000206,200$2,109
Q2 2016Renaissance Technologies LLCBuy9,000167,200$1,358
Q1 2016Renaissance Technologies LLCBuy8,400158,200$944
Q4 2015Renaissance Technologies LLCBuy2,200149,800$1,040
Q3 2015Renaissance Technologies LLCBuy2,900147,600$807
Q2 2015Renaissance Technologies LLCBuy3,000144,700$1,005
Q1 2015Renaissance Technologies LLCSell-2,900141,700$961
Q4 2014Renaissance Technologies LLCBuy8,900144,600$1,056
Q3 2014Renaissance Technologies LLCSell-300135,700$1,082
Q2 2014Renaissance Technologies LLCBuy8,500136,000$948
Q1 2014Renaissance Technologies LLCBuy16,000127,500$983
Q4 2013Renaissance Technologies LLCBuy20,800111,500$902
Q3 2013Ariel Appreciation FundSell-232,206137,030$969
Q3 2013Renaissance Technologies LLCBuy20,10090,700$641
Q2 2013Ariel Appreciation FundBuy369,236369,236$3,284
Q2 2013Renaissance Technologies LLCBuy70,60070,600$628

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.