(CIO) Stock Institutional Trading Activity


(CIO) 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 and Third Avenue Management. 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 2018Renaissance Technologies LLCSell-236,8431,720,496$17,635
Q3 2018Renaissance Technologies LLCBuy745,7391,957,339$24,702
Q1 2018Renaissance Technologies LLCSell-159,9491,211,600$14,006
Q4 2017Renaissance Technologies LLCBuy548,7491,371,549$17,844
Q3 2017Renaissance Technologies LLCBuy165,600822,800$11,330
Q2 2017Renaissance Technologies LLCBuy45,300657,200$8,346
Q1 2017Renaissance Technologies LLCBuy109,501611,900$7,435
Q4 2016Renaissance Technologies LLCSell-72,921502,399$6,617
Q3 2016Renaissance Technologies LLCBuy223,120575,320$7,324
Q2 2016Renaissance Technologies LLCBuy235,788352,200$4,572
Q1 2016Renaissance Technologies LLCBuy36,212116,412$1,327
Q4 2015Renaissance Technologies LLCBuy8,35180,200$977
Q3 2015Renaissance Technologies LLCBuy39,04971,849$816
Q2 2015Renaissance Technologies LLCBuy16,00032,800$407
Q1 2015Renaissance Technologies LLCBuy16,80016,800$214

Frequently asked questions about CIO activity

  • Which institutional owners are buying CIO?

    Institutional owners buying CIO 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 CIO activity?

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

  • Is institutional interest in CIO increasing?

    Institutional interest in CIO 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.