Cogent Communications Holdings CCOI Institutional Ownership

Updated Oct 11, 2026

Cogent Communications Holdings, Inc. (NASDAQ:CCOI) appeared in the 13F filings of 224 institutional investors for the quarter ended June 30, 2026.

• These investors owned 92.31% of Cogent Communications Holdings' outstanding stock in Q2 2026.
• Total shares held in CCOI fell 10.29% from Q1 2026; the number of holders fell 22.76% from Q2 2025.
• Looking at the 224 holders of CCOI individually, 120 added to their positions, 71 reduced their stakes and 33 left their positions unchanged.
• The aggregate institutional position in Cogent Communications Holdings was 47.28Mn shares at the end of Q2 2026, down 5.42Mn from the prior quarter and down 20.15K from a year earlier.
• BlackRock, Inc. was the top holder of Cogent Communications Holdings as of June 30, 2026, with 7.38Mn shares, or 14.40% of shares outstanding.
• Holders that added the most shares of Cogent Communications Holdings in Q2 2026 were Park West Asset Management LLC (+1.17Mn shares), Citadel Advisors LLC (+746.26K shares), State Street Corp (+506.1K shares), AQR Capital Management LLC (+405.65K shares) and BlackRock, Inc. (+301.01K shares).
• The biggest cuts to CCOI positions during Q2 2026 came from Turtle Creek Asset Management Inc. (-4.05Mn shares), Morgan Stanley (-1.26Mn shares), Harspring Capital Management, LLC (-487.58K shares), D. E. Shaw & Co., Inc. (-454.12K shares) and FMR LLC (-423.62K shares).
• Cogent Communications Holdings' 10 largest institutional shareholders as of Q2 2026 were BlackRock, Inc. (7.38Mn shares), Turtle Creek Asset Management Inc. (4.2Mn shares), Park West Asset Management LLC (3.11Mn shares), State Street Corp (2.78Mn shares), Vanguard Portfolio Management LLC (2.38Mn shares), EdgePoint Investment Group Inc. (2.28Mn shares), Vanguard Capital Management LLC (2.04Mn shares), Newtyn Management, LLC (1.66Mn shares), Geode Capital Management, LLC (1.25Mn shares) and Citadel Advisors LLC (1.17Mn shares), per Business Quant data.