COGENT COMMUNICATIONS HOLDIN (CCOI) Institutional Shareholders
COGENT COMMUNICATIONS HOLDIN (CCOI) is currently reported in institutional portfolios tracked by InsiderSet based on the latest available SEC Form 13F filings for the quarter ended June 30, 2026. The institutional investors covered on this page collectively reported approximately $669.46M in CCOI holdings during the latest filing period.
Blackrock, Inc. is currently the largest disclosed institutional shareholder of CCOI tracked by InsiderSet, reporting ownership valued at approximately $102.38M in its June 30, 2026 SEC Form 13F filing. Based on current market prices and the latest disclosed share count, the position is now estimated to be worth approximately $70.00M, representing an estimated loss of -31.63% since the filing period.
The top 10 institutional shareholders tracked on this page collectively account for approximately 59% of the total disclosed CCOI value among the investors covered in this analysis. Major shareholders include Blackrock, Inc., Turtle Creek Asset Management, Park West Asset Management Llc, and several other long-term asset managers with concentrated positions in COGENT COMMUNICATIONS HOLDIN (CCOI).
This page ranks the largest institutional CCOI shareholders using publicly disclosed SEC Form 13F data, including reported values, estimated current holding values, portfolio allocation percentages, ownership concentration metrics, and historical holding changes across major hedge funds and investment firms.
Institutional Holders
225
Total Reported Value
$669.46M
Largest Holder
Blackrock, Inc.
Largest Position
$102.38M
Insider Transactions (90d)
10
Latest Filing Quarter
Q2 2026
New Institutional Positions
60
Funds Exiting Positions
0
| Name | Investor/Manager | Portfolio % | Quantity | Reported Balance | Current Estimated Value | Gain/loss Since Filing | Estimated Portfolio Performance |
|---|---|---|---|---|---|---|---|
| Blackrock, Inc. | 0.00% | 7,376,384 | $102,384,215 | $70,001,884 | -$32,382,331 | -31.63% | |
| Turtle Creek Asset Management | Andrew Brenton | 2.28% | 4,203,527 | $58,344,955 | $39,891,471 | -$18,453,484 | -31.63% |
| Park West Asset Management Llc | 2.95% | 3,106,339 | $43,115,985 | $29,479,157 | -$13,636,828 | -31.63% | |
| State Street Corp | 0.00% | 2,779,367 | $38,577,614 | $26,376,193 | -$12,201,421 | -31.63% | |
| Vanguard Portfolio Management Llc | 0.00% | 2,384,929 | $33,102,815 | $22,632,976 | -$10,469,839 | -31.63% | |
| Edgepoint Investment Group Inc. | 0.24% | 2,283,378 | $31,693,287 | $21,669,257 | -$10,024,030 | -31.63% | |
| Vanguard Capital Management Llc | 0.00% | 2,037,716 | $28,283,498 | $19,337,925 | -$8,945,573 | -31.63% | |
| Newtyn Management, Llc | 2.87% | 1,655,895 | $22,983,823 | $15,714,444 | -$7,269,379 | -31.63% | |
| Geode Capital Management, Llc | 0.00% | 1,245,445 | $17,290,622 | $11,819,273 | -$5,471,349 | -31.64% | |
| Citadel Advisors Llc | 0.01% | 1,172,541 | $16,274,869 | $11,127,414 | -$5,147,455 | -31.63% | |
| Magnolia Group, Llc | 2.86% | 979,686 | $13,598,042 | $9,297,220 | -$4,300,822 | -31.63% | |
| Goldman Sachs Group Inc | 0.00% | 973,138 | $13,507,153 | $9,235,080 | -$4,272,073 | -31.63% | |
| Oakum Bay Capital Llc | 6.98% | 690,374 | $13,006,646 | $6,551,649 | -$6,454,997 | -49.63% | |
| Charles Schwab Investment Management Inc | 0.00% | 805,244 | $11,176,787 | $7,641,766 | -$3,535,021 | -31.63% | |
| Sixth Street Partners Management Company, L.P. | 0.00% | 805,244 | $11,176,787 | $7,641,766 | -$3,535,021 | -31.63% | |
| Gilder Gagnon Howe & Co Llc | 0.11% | 783,783 | $10,878,908 | $7,438,101 | -$3,440,807 | -31.63% | |
| Broad Run Investment Management, Llc | 1.41% | 660,130 | $9,162,604 | $6,264,634 | -$2,897,970 | -31.63% | |
| Morgan Stanley | 0.00% | 627,593 | $8,711,004 | $5,955,858 | -$2,755,146 | -31.63% | |
| Aqr Capital Management Llc | 0.00% | 615,561 | $8,543,988 | $5,841,674 | -$2,702,314 | -31.63% | |
| Harspring Capital Management, Llc | 15.49% | 599,418 | $8,319,922 | $5,688,477 | -$2,631,445 | -31.63% | |
| Northern Trust Corp | 0.00% | 516,683 | $7,171,559 | $4,903,322 | -$2,268,237 | -31.63% | |
| Ubs Group Ag | 0.00% | 512,618 | $7,115,138 | $4,864,745 | -$2,250,393 | -31.63% | |
| Centerbook Partners Lp | 0.34% | 503,457 | $6,987,983 | $4,777,807 | -$2,210,176 | -31.63% | |
| Ayal Capital Advisors Ltd | 2.84% | 400,000 | $5,552,000 | $3,796,000 | -$1,756,000 | -31.63% | |
| Frontier Capital Management Co Llc | 0.05% | 382,608 | $5,310,595 | $3,630,950 | -$1,679,645 | -31.63% | |
| Vanguard Fiduciary Trust Co | 0.00% | 344,108 | $4,776,219 | $3,265,585 | -$1,510,634 | -31.63% | |
| Bnp Paribas Financial Markets | 0.00% | 328,127 | $4,554,403 | $3,113,925 | -$1,440,478 | -31.63% | |
| Granahan Investment Management, Llc | 0.15% | 302,653 | $4,200,824 | $2,872,177 | -$1,328,647 | -31.63% | |
| Pdt Partners, Llc | 0.22% | 296,439 | $4,114,573 | $2,813,206 | -$1,301,367 | -31.63% | |
| D. E. Shaw & Co., Inc. | 0.00% | 284,694 | $3,951,553 | $2,701,746 | -$1,249,807 | -31.63% | |
| Susquehanna International Group, Llp | 0.00% | 280,790 | $3,897,365 | $2,664,697 | -$1,232,668 | -31.63% | |
| Invesco Ltd. | 0.00% | 268,923 | $3,732,651 | $2,552,079 | -$1,180,572 | -31.63% | |
| Fourworld Capital Management Llc | 4.26% | 265,500 | $3,685,140 | $2,519,595 | -$1,165,545 | -31.63% | |
| Bank Of New York Mellon Corp | 0.00% | 265,490 | $3,685,000 | $2,519,500 | -$1,165,500 | -31.63% | |
| Jpmorgan Chase & Co | 0.00% | 267,486 | $3,545,199 | $2,538,442 | -$1,006,757 | -28.40% | |
| Bank Of America Corp | 0.00% | 254,861 | $3,537,471 | $2,418,631 | -$1,118,840 | -31.63% | |
| Jump Financial, Llc | 0.03% | 251,745 | $3,494,220 | $2,389,060 | -$1,105,160 | -31.63% | |
| Blackbarn Capital Partners Lp | 0.86% | 250,000 | $3,470,000 | $2,372,500 | -$1,097,500 | -31.63% | |
| Herald Investment Management Ltd | 0.46% | 242,600 | $3,364,862 | $2,302,274 | -$1,062,588 | -31.58% | |
| Myda Advisors Llc | 0.81% | 240,000 | $3,331,200 | $2,277,600 | -$1,053,600 | -31.63% | |
| Palliser Capital (Uk) Ltd | 1.76% | 236,393 | $3,281,135 | $2,243,370 | -$1,037,765 | -31.63% | |
| Principal Financial Group Inc | 0.00% | 233,633 | $3,242,825 | $2,217,177 | -$1,025,648 | -31.63% | |
| Squarepoint Ops Llc | 0.01% | 226,035 | $3,137,366 | $2,145,072 | -$992,294 | -31.63% | |
| Xtx Topco Ltd | 0.04% | 220,290 | $3,057,625 | $2,090,552 | -$967,073 | -31.63% | |
| Ubs Am, A Distinct Business Unit Of Ubs Asset Management Americas Llc | 0.00% | 136,701 | $2,575,448 | $1,297,292 | -$1,278,156 | -49.63% | |
| Nuveen, Llc | 0.00% | 169,874 | $2,357,852 | $1,612,104 | -$745,748 | -31.63% | |
| Fmr Llc | 0.00% | 165,173 | $2,292,597 | $1,567,492 | -$725,105 | -31.63% | |
| Public Sector Pension Investment Board | 0.01% | 164,109 | $2,277,833 | $1,557,394 | -$720,439 | -31.63% | |
| Global Endowment Management, Lp | 0.22% | 158,582 | $2,201,000 | $1,504,943 | -$696,057 | -31.62% | |
| Y-Intercept (Hong Kong) Ltd | 0.04% | 154,019 | $2,137,784 | $1,461,640 | -$676,144 | -31.63% |
Frequently asked questions about CCOI
Who owns the most CCOI stock?
The largest holders of CCOI are typically major institutional investors such as asset managers and hedge funds reporting on Form 13F. The table above ranks tracked superinvestors by reported position size using the latest available filings for COGENT COMMUNICATIONS HOLDIN (CCOI).
Is CCOI widely held by superinvestors?
Many widely followed stocks like CCOI appear across numerous superinvestor portfolios because of liquidity, index inclusion, and fundamentals. The holder count and table above show how broadly CCOI is represented among the institutional managers we track.
What do “Current Estimated Value”, “Gain/loss Since Filing”, and “Estimated Portfolio Performance” mean?
Current Estimated Value is reported share quantity from the latest 13F times our most recent split-adjusted U.S. session close. Gain/loss Since Filing is that estimate minus the reported 13F dollar value; Estimated Portfolio Performance is that difference as a percent of the reported value. Green means the estimate is above the filing value; red means below (not purchase cost). If many filers share the same implied filing price per share, the performance % may match across rows. These are not official fund marks or live quotes.