Cogent Communications Holdings, Inc. (CCOI) Institutional Ownership

Ownership Summary

Cogent Communications Holdings, Inc. (NASDAQ:CCOI) has 238 institutional investors with active 13F positions as of December 2025.

• Collectively, these holders controlled 100.6% of Cogent Communications Holdings's outstanding shares in December 2025, down from 110.4% in September 2025.
• They increased total shares held in Cogent Communications Holdings by 2.48% from the prior quarter, while the number of investors in CCOI decreased 22.73% year over year.
• Of these 238 holders, 135 added to their stakes in Cogent Communications Holdings, 78 trimmed positions, and 25 made no changes.
• Altogether, these fund groups held 48.12Mn shares in CCOI by December 2025, up by 1.17Mn shares quarter on quarter, and down 1.71Mn shares year over year.
• As of December 31, 2025, the biggest holder of Cogent Communications Holdings is Turtle Creek Asset Management Inc. at 8.25Mn shares, representing 17.26% of shares outstanding.
• The largest buyers of Cogent Communications Holdings for the quarter ending December 2025 were Turtle Creek Asset Management Inc. (4.22Mn), VANGUARD PORTFOLIO MANAGEMENT LLC (2.75Mn), VANGUARD CAPITAL MANAGEMENT LLC (2.12Mn), Morgan Stanley (630.62K), Park West Asset Management LLC (526.1K).
• Top sellers of CCOI stock for the quarter ending December 2025 included Bank Of America Corp /De/ (899.07K), Goldman Sachs Group Inc (516.16K), Royal Bank Of Canada (493.52K), Harspring Capital Management, LLC (315.5K), Man Group plc (235.94K).
• Per Business Quant data, the top 10 holders of Cogent Communications Holdings for the quarter ending December 2025 are Turtle Creek Asset Management Inc. (8.25Mn), BlackRock, Inc. (7.08Mn), VANGUARD PORTFOLIO MANAGEMENT LLC (2.75Mn), EdgePoint Investment Group Inc. (2.28Mn), State Street Corp (2.27Mn), VANGUARD CAPITAL MANAGEMENT LLC (2.12Mn), Park West Asset Management LLC (1.94Mn), Morgan Stanley (1.88Mn), Newtyn Management, LLC (1.6Mn), MAGNOLIA GROUP, LLC (1.29Mn).