SEI INVESTMENTS COMPANY (SEIC) Stock Institutional Trading Activity


SEI INVESTMENTS COMPANY (SEIC) 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, Cullen Value Fund, Sequoia Financial Advisors, Kahn Brothers Group, and Torray 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
Q2 2021Renaissance Technologies LLCSell-148,70047,026$2,914
Q1 2021Torray FundBuy30,651224,440$13,675
Q1 2021Renaissance Technologies LLCBuy50,400195,726$11,926
Q4 2020Torray FundBuy69193,789$11,137
Q4 2020Renaissance Technologies LLCSell-177,600145,326$8,352
Q3 2020Torray FundBuy193,720193,720$9,825
Q3 2020Renaissance Technologies LLCBuy28,000322,926$16,379
Q2 2020Parnassus Endeavor FundSell-463,351461,351$25,365
Q2 2020Renaissance Technologies LLCSell-601,500294,926$16,215
Q1 2020Ariel Appreciation FundBuy67,37867,378$3,122
Q1 2020Parnassus Endeavor FundSell-611,994924,702$42,851
Q1 2020Renaissance Technologies LLCBuy41,026896,426$41,540
Q4 2019Parnassus Endeavor FundBuy162,2891,536,696$100,623
Q4 2019Renaissance Technologies LLCSell-124,026855,400$56,012
Q3 2019Parnassus Endeavor FundSell-155,0131,374,407$81,440
Q3 2019Renaissance Technologies LLCSell-140,800979,426$58,036
Q2 2019Parnassus Endeavor FundSell-61,0541,529,420$85,800
Q2 2019Renaissance Technologies LLCBuy149,9001,120,226$62,845
Q1 2019Parnassus Endeavor FundBuy322,2541,590,474$83,102
Q1 2019Renaissance Technologies LLCBuy376,317970,326$50,700
Q4 2018Parnassus Endeavor FundBuy170,6751,268,220$58,592
Q4 2018Renaissance Technologies LLCBuy385,083594,009$27,443
Q3 2018Renaissance Technologies LLCBuy179,300208,926$12,765
Q1 2018Renaissance Technologies LLCSell-43,67429,626$2,219
Q4 2017Parnassus Endeavor FundSell-54,6081,097,545$78,870
Q4 2017Renaissance Technologies LLCSell-19,72673,300$5,267
Q3 2017Mairs & Power Growth FundBuy3,3003,300$201
Q3 2017Renaissance Technologies LLCBuy16,40093,026$5,680
Q2 2017Parnassus Endeavor FundSell-147,8471,152,153$61,963
Q2 2017Renaissance Technologies LLCBuy17,20076,626$4,121

Frequently asked questions about SEIC activity

  • Which institutional owners are buying SEIC?

    Institutional owners buying SEIC 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 SEIC activity?

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

  • Is institutional interest in SEIC increasing?

    Institutional interest in SEIC 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.