COGENT COMMUNICATIONS HOLDIN (CCOI) Top 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 March 31, 2026. The institutional investors covered on this page collectively reported approximately $967.23M in CCOI holdings during the latest filing period.
Turtle Creek Asset Management is currently the largest disclosed institutional shareholder of CCOI tracked by InsiderSet, reporting ownership valued at approximately $155.48M in its March 31, 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 $120.57M, representing an estimated loss of -22.45% since the filing period.
The top 10 institutional shareholders tracked on this page collectively account for approximately 61% of the total disclosed CCOI value among the investors covered in this analysis. Major shareholders include Turtle Creek Asset Management, Blackrock, Inc., Vanguard Portfolio 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
229
Total Reported Value
$967.23M
Largest Holder
Turtle Creek Asset Management
Largest Position
$155.48M
Insider Transactions (90d)
0
Latest Filing Quarter
Q1 2026
New Institutional Positions
140
Funds Exiting Positions
0
| Name | Investor/Manager | Portfolio % | Quantity | Reported Balance | Current Estimated Value | Gain/loss Since Filing | Estimated Portfolio Performance |
|---|---|---|---|---|---|---|---|
| Turtle Creek Asset Management | Andrew Brenton | 3.96% | 8,252,844 | $155,483,581 | $120,574,051 | -$34,909,530 | -22.45% |
| Blackrock, Inc. | 0.00% | 7,075,372 | $133,300,018 | $103,371,185 | -$29,928,833 | -22.45% | |
| Vanguard Portfolio Management Llc | 0.00% | 2,748,759 | $51,786,620 | $40,159,369 | -$11,627,251 | -22.45% | |
| Edgepoint Investment Group Inc. | 0.34% | 2,283,378 | $43,018,842 | $33,360,153 | -$9,658,689 | -22.45% | |
| State Street Corp | 0.00% | 2,273,265 | $42,828,313 | $33,212,402 | -$9,615,911 | -22.45% | |
| Vanguard Capital Management Llc | 0.00% | 2,120,531 | $39,950,804 | $30,980,958 | -$8,969,846 | -22.45% | |
| Park West Asset Management Llc | 3.22% | 1,935,201 | $36,459,187 | $28,273,287 | -$8,185,900 | -22.45% | |
| Morgan Stanley | 0.00% | 1,883,072 | $35,477,106 | $27,511,682 | -$7,965,424 | -22.45% | |
| Newtyn Management, Llc | 3.22% | 1,600,000 | $30,144,000 | $23,376,000 | -$6,768,000 | -22.45% | |
| Magnolia Group, Llc | 4.52% | 1,290,204 | $24,307,443 | $18,849,880 | -$5,457,563 | -22.45% | |
| Geode Capital Management, Llc | 0.00% | 1,205,635 | $22,718,512 | $17,614,327 | -$5,104,185 | -22.47% | |
| Digitalbridge Group, Inc. | 1.37% | 1,142,952 | $21,533,215 | $16,698,529 | -$4,834,686 | -22.45% | |
| Harspring Capital Management, Llc | 10.77% | 1,087,000 | $20,479,080 | $15,881,070 | -$4,598,010 | -22.45% | |
| Charles Schwab Investment Management Inc | 0.00% | 760,117 | $14,320,604 | $11,105,309 | -$3,215,295 | -22.45% | |
| D. E. Shaw & Co., Inc. | 0.01% | 738,815 | $13,919,274 | $10,794,087 | -$3,125,187 | -22.45% | |
| Goldman Sachs Group Inc | 0.00% | 712,934 | $13,431,671 | $10,415,966 | -$3,015,705 | -22.45% | |
| Oakum Bay Capital Llc | 6.98% | 690,374 | $13,006,646 | $10,086,364 | -$2,920,282 | -22.45% | |
| Broad Run Investment Management, Llc | 2.20% | 663,200 | $12,494,688 | $9,689,352 | -$2,805,336 | -22.45% | |
| Fmr Llc | 0.00% | 588,788 | $11,092,775 | $8,602,193 | -$2,490,582 | -22.45% | |
| Blackbarn Capital Partners Lp | 2.83% | 500,000 | $9,420,000 | $7,305,000 | -$2,115,000 | -22.45% | |
| Gilder Gagnon Howe & Co Llc | 0.11% | 499,290 | $9,406,624 | $7,294,627 | -$2,111,997 | -22.45% | |
| Northern Trust Corp | 0.00% | 497,195 | $9,367,154 | $7,264,019 | -$2,103,135 | -22.45% | |
| Centerbook Partners Lp | 0.50% | 494,283 | $9,312,292 | $7,221,475 | -$2,090,817 | -22.45% | |
| 683 Capital Management, Llc | 0.79% | 450,300 | $8,483,652 | $6,578,883 | -$1,904,769 | -22.45% | |
| Citadel Advisors Llc | 0.01% | 426,280 | $8,031,115 | $6,227,951 | -$1,803,164 | -22.45% | |
| Ubs Group Ag | 0.00% | 425,968 | $8,025,237 | $6,223,392 | -$1,801,845 | -22.45% | |
| Frontier Capital Management Co Llc | 0.08% | 399,208 | $7,521,081 | $5,832,429 | -$1,688,652 | -22.45% | |
| Boothbay Fund Management, Llc | 0.16% | 378,929 | $7,139,022 | $5,536,153 | -$1,602,869 | -22.45% | |
| Palliser Capital (Uk) Ltd | 4.89% | 334,444 | $6,300,925 | $4,886,227 | -$1,414,698 | -22.45% | |
| Vanguard Fiduciary Trust Co | 0.00% | 334,428 | $6,300,624 | $4,885,993 | -$1,414,631 | -22.45% | |
| Granahan Investment Management, Llc | 0.29% | 317,447 | $5,980,701 | $4,637,901 | -$1,342,800 | -22.45% | |
| Bank Of America Corp | 0.00% | 302,393 | $5,697,084 | $4,417,962 | -$1,279,122 | -22.45% | |
| Pdt Partners, Llc | 0.32% | 283,629 | $5,343,570 | $4,143,820 | -$1,199,750 | -22.45% | |
| Jane Street Group, Llc | 0.01% | 277,486 | $5,227,836 | $4,054,070 | -$1,173,766 | -22.45% | |
| Fourworld Capital Management Llc | 2.72% | 265,500 | $5,002,020 | $3,878,955 | -$1,123,065 | -22.45% | |
| Bank Of New York Mellon Corp | 0.00% | 264,569 | $4,984,483 | $3,865,353 | -$1,119,130 | -22.45% | |
| Herald Investment Management Ltd | 0.64% | 242,600 | $4,570,584 | $3,544,386 | -$1,026,198 | -22.45% | |
| Invesco Ltd. | 0.00% | 242,426 | $4,567,305 | $3,541,844 | -$1,025,461 | -22.45% | |
| Walleye Capital Llc | 0.03% | 239,557 | $4,513,254 | $3,499,928 | -$1,013,326 | -22.45% | |
| Principal Financial Group Inc | 0.00% | 232,206 | $4,374,761 | $3,392,530 | -$982,231 | -22.45% | |
| Millennium Management Llc | 0.00% | 228,396 | $4,302,981 | $3,336,866 | -$966,115 | -22.45% | |
| Aqr Capital Management Llc | 0.00% | 209,909 | $3,954,688 | $3,066,770 | -$887,918 | -22.45% | |
| Public Sector Pension Investment Board | 0.01% | 169,759 | $3,198,260 | $2,480,179 | -$718,081 | -22.45% | |
| Nuveen, Llc | 0.00% | 168,500 | $3,174,540 | $2,461,785 | -$712,755 | -22.45% | |
| Blair William & Co/Il | 0.01% | 166,521 | $3,137,250 | $2,432,872 | -$704,378 | -22.45% | |
| Advisors Asset Management, Inc. | 0.05% | 149,698 | $2,820,310 | $2,187,088 | -$633,222 | -22.45% | |
| Tudor Investment Corp Et Al | 0.01% | 139,692 | $2,631,797 | $2,040,900 | -$590,897 | -22.45% | |
| Rhumbline Advisers | 0.00% | 137,920 | $2,598,393 | $2,015,011 | -$583,382 | -22.45% | |
| Ubs Am, A Distinct Business Unit Of Ubs Asset Management Americas Llc | 0.00% | 136,701 | $2,575,448 | $1,997,202 | -$578,246 | -22.45% | |
| Bluefin Capital Management, Llc | 2.42% | 132,304 | $2,492,607 | $1,932,961 | -$559,646 | -22.45% |
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.