COGENT COMMUNICATIONS HOLDIN (CCOI) Stock Institutional Trading Activity


COGENT COMMUNICATIONS HOLDIN (CCOI) 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 Turtle Creek Asset Management, Renaissance Technologies LLC, Eagle Capital Management, and Dodge & Cox Stock 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
Q1 2020Dodge & Cox Stock FundBuy2,9902,990$245
Q4 2019Renaissance Technologies LLCSell-27,3343,588,366$236,150
Q4 2019Turtle Creek Asset ManagementSell-7,5009,700$638
Q3 2019Renaissance Technologies LLCBuy192,0003,615,700$199,225
Q3 2019Turtle Creek Asset ManagementSell-5,70017,200$948
Q2 2019Renaissance Technologies LLCBuy47,3003,423,700$203,231
Q2 2019Turtle Creek Asset ManagementSell-12,40022,900$1,359
Q1 2019Renaissance Technologies LLCSell-37,2003,376,400$183,170
Q1 2019Turtle Creek Asset ManagementSell-3,40035,300$1,915
Q4 2018Renaissance Technologies LLCBuy41,7003,413,600$154,329
Q4 2018Turtle Creek Asset ManagementBuy5,25038,700$1,750
Q3 2018Renaissance Technologies LLCBuy367,9003,371,900$188,152
Q3 2018Turtle Creek Asset ManagementBuy90033,450$1,867
Q2 2018Turtle Creek Asset ManagementSell-7,05032,550$1,738
Q1 2018Renaissance Technologies LLCBuy228,7003,004,000$130,374
Q1 2018Turtle Creek Asset ManagementBuy8,00039,600$1,719
Q4 2017Renaissance Technologies LLCBuy354,8002,775,300$125,721
Q4 2017Turtle Creek Asset ManagementBuy31,60031,600$1,431
Q3 2017Renaissance Technologies LLCBuy361,9002,420,500$118,362
Q2 2017Renaissance Technologies LLCBuy245,1002,058,600$82,550
Q1 2017Renaissance Technologies LLCBuy187,4001,813,500$78,071
Q4 2016Renaissance Technologies LLCBuy147,0001,626,100$67,239
Q3 2016Renaissance Technologies LLCSell-57,2001,479,100$54,446
Q3 2016Eagle Capital ManagementSell-8,30014,800$545
Q2 2016Renaissance Technologies LLCSell-61,6001,536,300$61,544
Q1 2016Renaissance Technologies LLCBuy84,4001,597,900$62,366
Q1 2016Eagle Capital ManagementSell-13,60023,100$902
Q4 2015Renaissance Technologies LLCSell-36,8521,513,500$52,503
Q3 2015Renaissance Technologies LLCBuy204,3521,550,352$42,108
Q3 2015Eagle Capital ManagementBuy36,70036,700$997

Frequently asked questions about CCOI activity

  • Which institutional owners are buying CCOI?

    Institutional owners buying CCOI 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 CCOI activity?

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

  • Is institutional interest in CCOI increasing?

    Institutional interest in CCOI 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.