COGENT COMMUNICATIONS HOLDINGS, INC. (CCOI) — Institutional Holders, Q2 2026
225 institutional investment managers reported a CCOI position on SEC Form 13F-HR for the quarter ended June 30, 2026, with a combined reported value of $655.5M. Every filer is listed below, ranked by position value, 100 per page; this page shows ranks 1 to 100. Put and call option positions are excluded, and a firm filing several lots or share classes is shown once with its total.
CCOI in Q2 2026: what funds did
Funds that filed a 13F for both Q1 2026 and Q2 2026, by what they did with the common stock. Share counts are adjusted for any split between the two quarters; dollar figures are the change in shares at this quarter’s price.
Biggest buyers
- Park West Asset ManagementAdded · +1,171,138 sh+$16.3M
- CITADEL ADVISORSAdded · +746,261 sh+$10.4M
- STATE STREETAdded · +506,102 sh+$7.0M
- AQR CAPITAL MANAGEMENTAdded · +405,652 sh+$5.6M
- AYAL Capital Advisors LtdNew · +400,000 sh+$5.6M
Biggest sellers
- Turtle Creek Asset ManagementTrimmed · -4,049,317 sh-$56.2M
- MORGAN STANLEYTrimmed · -1,255,479 sh-$17.4M
- DigitalBridge GroupSold out · -1,142,952 sh-$15.9M
- Harspring Capital ManagementTrimmed · -487,582 sh-$6.8M
- D. E. ShawTrimmed · -454,121 sh-$6.3M
CCOI 13F holders ranked 1–100 of 225
| # | Institution | Shares | Value | % of portfolio | QoQShares vs Q1 2026 |
|---|---|---|---|---|---|
| 1 | BlackRock#1 · 7,376,384 sh | 7,376,384 | $102.4M | <0.01% | +4.3% |
| 2 | Turtle Creek Asset Management#2 · 4,203,527 sh | 4,203,527 | $58.3M | 2.28% | -49.1% |
| 3 | Park West Asset Management#3 · 3,106,339 sh | 3,106,339 | $43.1M | 2.94% | +60.5% |
| 4 | STATE STREET#4 · 2,779,367 sh | 2,779,367 | $38.6M | <0.01% | +22.3% |
| 5 | VANGUARD PORTFOLIO MANAGEMENT#5 · 2,384,929 sh | 2,384,929 | $33.1M | <0.01% | -13.2% |
| 6 | EdgePoint Investment Group#6 · 2,283,378 sh | 2,283,378 | $31.7M | 0.24% | 0.0% |
| 7 | VANGUARD CAPITAL MANAGEMENT#7 · 2,037,716 sh | 2,037,716 | $28.3M | <0.01% | -3.9% |
| 8 | Newtyn Management#8 · 1,655,895 sh | 1,655,895 | $23.0M | 2.87% | +3.5% |
| 9 | GEODE CAPITAL MANAGEMENT#9 · 1,245,445 sh | 1,245,445 | $17.3M | <0.01% | +3.3% |
| 10 | CITADEL ADVISORS#10 · 1,172,541 sh | 1,172,541 | $16.3M | <0.01% | +175.1% |
| 11 | MAGNOLIA GROUP#11 · 979,686 sh | 979,686 | $13.6M | 2.86% | -24.1% |
| 12 | GOLDMAN SACHS GROUP#12 · 973,138 sh | 973,138 | $13.5M | <0.01% | +36.5% |
| 13 | CHARLES SCHWAB INVESTMENT MANAGEMENT#13 · 805,244 sh | 805,244 | $11.2M | <0.01% | +5.9% |
| 14 | GILDER GAGNON HOWE#14 · 783,783 sh | 783,783 | $10.9M | 0.11% | +57.0% |
| 15 | Broad Run Investment Management#15 · 660,130 sh | 660,130 | $9.2M | 1.41% | -0.5% |
| 16 | MORGAN STANLEY#16 · 627,593 sh | 627,593 | $8.7M | <0.01% | -66.7% |
| 17 | AQR CAPITAL MANAGEMENT#17 · 615,561 sh | 615,561 | $8.5M | <0.01% | +193.3% |
| 18 | Harspring Capital Management#18 · 599,418 sh | 599,418 | $8.3M | 15.49% | -44.9% |
| 19 | HRT FINANCIAL#19 · 557,674 sh | 557,674 | $7.7M | 0.02% | +9.5% |
| 20 | NORTHERN#20 · 516,683 sh | 516,683 | $7.2M | <0.01% | +3.9% |
| 21 | UBS Group AG#21 · 512,618 sh | 512,618 | $7.1M | <0.01% | +20.3% |
| 22 | CenterBook Partners#22 · 503,457 sh | 503,457 | $7.0M | 0.34% | +1.9% |
| 23 | AYAL Capital Advisors Ltd#23 · 400,000 sh | 400,000 | $5.6M | 1.50% | New |
| 24 | FRONTIER CAPITAL MANAGEMENT#24 · 382,608 sh | 382,608 | $5.3M | 0.05% | -4.2% |
| 25 | VANGUARD FIDUCIARY#25 · 344,108 sh | 344,108 | $4.8M | <0.01% | +2.9% |
| 26 | BNP PARIBAS FINANCIAL MARKETS#26 · 328,127 sh | 328,127 | $4.6M | <0.01% | +321.7% |
| 27 | Granahan Investment Management#27 · 302,653 sh | 302,653 | $4.2M | 0.15% | -4.7% |
| 28 | PDT Partners#28 · 296,439 sh | 296,439 | $4.1M | 0.22% | +4.5% |
| 29 | D. E. Shaw#29 · 284,694 sh | 284,694 | $4.0M | <0.01% | -61.5% |
| 30 | SUSQUEHANNA INTERNATIONAL GROUP, LLP#30 · 280,790 sh | 280,790 | $3.9M | <0.01% | +115.8% |
| 31 | Invesco Ltd.#31 · 268,923 sh | 268,923 | $3.7M | <0.01% | +10.9% |
| 32 | FourWorld Capital Management#32 · 265,500 sh | 265,500 | $3.7M | 3.35% | 0.0% |
| 33 | Bank of New York Mellon#33 · 265,490 sh | 265,490 | $3.7M | <0.01% | +0.3% |
| 34 | JPMORGAN CHASE#34 · 267,486 sh | 267,486 | $3.5M | <0.01% | -45.7% |
| 35 | BANK OF AMERICA#35 · 254,861 sh | 254,861 | $3.5M | <0.01% | -15.7% |
| 36 | Jump Financial#36 · 251,745 sh | 251,745 | $3.5M | 0.03% | New |
| 37 | BlackBarn Capital Partners#37 · 250,000 sh | 250,000 | $3.5M | 0.29% | -50.0% |
| 38 | Herald Investment Management Ltd#38 · 242,600 sh | 242,600 | $3.4M | — | 0.0% |
| 39 | MYDA Advisors#39 · 240,000 sh | 240,000 | $3.3M | 0.50% | New |
| 40 | Palliser Capital (UK) Ltd#40 · 236,393 sh | 236,393 | $3.3M | 1.76% | -29.3% |
| 41 | PRINCIPAL FINANCIAL GROUP#41 · 233,633 sh | 233,633 | $3.2M | <0.01% | +0.6% |
| 42 | Squarepoint Ops#42 · 226,035 sh | 226,035 | $3.1M | <0.01% | +341.1% |
| 43 | XTX Topco Ltd#43 · 220,290 sh | 220,290 | $3.1M | 0.04% | +651.2% |
| 44 | Nuveen#44 · 169,874 sh | 169,874 | $2.4M | <0.01% | +0.8% |
| 45 | FMR#45 · 165,173 sh | 165,173 | $2.3M | <0.01% | -71.9% |
| 46 | PUBLIC SECTOR PENSION INVESTMENT BOARD#46 · 164,109 sh | 164,109 | $2.3M | <0.01% | -3.3% |
| 47 | Global Endowment Management#47 · 158,582 sh | 158,582 | $2.2M | 0.22% | +759.9% |
| 48 | Y-Intercept (Hong Kong) Ltd#48 · 154,019 sh | 154,019 | $2.1M | — | New |
| 49 | CAXTON ASSOCIATES LLP#49 · 145,106 sh | 145,106 | $2.0M | 0.04% | +174.4% |
| 50 | UBS AM, a distinct business unit of UBS ASSET MANAGEMENT AME#50 · 143,160 sh | 143,160 | $2.0M | <0.01% | +4.7% |
| 51 | TUDOR INVESTMENT ET AL#51 · 139,269 sh | 139,269 | $1.9M | <0.01% | -0.3% |
| 52 | BLAIR WILLIAM#52 · 134,381 sh | 134,381 | $1.9M | <0.01% | -19.3% |
| 53 | ALGERT GLOBAL#53 · 132,470 sh | 132,470 | $1.8M | 0.02% | New |
| 54 | LPL Financial#54 · 122,316 sh | 122,316 | $1.7M | <0.01% | +35.0% |
| 55 | MILLENNIUM MANAGEMENT#55 · 119,138 sh | 119,138 | $1.7M | <0.01% | -47.8% |
| 56 | RHUMBLINE ADVISERS#56 · 118,915 sh | 118,915 | $1.7M | <0.01% | -13.8% |
| 57 | BOOTHBAY FUND MANAGEMENT#57 · 118,403 sh | 118,403 | $1.6M | 0.02% | -68.8% |
| 58 | Advisors Asset Management#58 · 114,375 sh | 114,375 | $1.6M | 0.02% | -23.6% |
| 59 | Legal & General Group Plc#59 · 102,920 sh | 102,920 | $1.4M | <0.01% | -3.5% |
| 60 | Skylands Capital#60 · 98,425 sh | 98,425 | $1.4M | — | +43.4% |
| 61 | Swiss National Bank#61 · 98,000 sh | 98,000 | $1.4M | <0.01% | +1.0% |
| 62 | WINTON GROUP Ltd#62 · 89,009 sh | 89,009 | $1.2M | 0.04% | +27.0% |
| 63 | Schonfeld Strategic Advisors#63 · 86,639 sh | 86,639 | $1.2M | <0.01% | New |
| 64 | AMERIPRISE FINANCIAL#64 · 77,824 sh | 77,824 | $1.1M | <0.01% | -3.6% |
| 65 | STATE OF WISCONSIN INVESTMENT BOARD#65 · 75,678 sh | 75,678 | $1.1M | <0.01% | +1.6% |
| 66 | PRICE T ROWE ASSOCIATES#66 · 73,289 sh | 73,289 | $1.0M | <0.01% | +18.6% |
| 67 | WELLS FARGO & COMPANY#67 · 69,899 sh | 69,899 | $970.2K | <0.01% | -29.2% |
| 68 | JANE STREET GROUP#68 · 69,619 sh | 69,619 | $966.3K | <0.01% | -74.9% |
| 69 | NEW YORK STATE TEACHERS RETIREMENT SYSTEM#69 · 68,710 sh | 68,710 | $954.0K | — | -0.8% |
| 70 | ALLIANCEBERNSTEIN L.P.#70 · 50,321 sh | 50,321 | $948.0K | <0.01% | 0.0% |
| 71 | BROWN ADVISORY#71 · 57,476 sh | 57,476 | $797.8K | <0.01% | +1.9% |
| 72 | DEUTSCHE BANK AG\#72 · 56,728 sh | 56,728 | $787.4K | <0.01% | +14.8% |
| 73 | ACADIAN ASSET MANAGEMENT#73 · 56,536 sh | 56,536 | $781.0K | <0.01% | New |
| 74 | CITIGROUP#74 · 53,544 sh | 53,544 | $743.2K | <0.01% | +26.9% |
| 75 | IMC-Chicago#75 · 50,535 sh | 50,535 | $701.4K | <0.01% | +9.5% |
| 76 | PRUDENTIAL FINANCIAL#76 · 50,175 sh | 50,175 | $696.4K | <0.01% | +1.3% |
| 77 | RENAISSANCE TECHNOLOGIES#77 · 49,231 sh | 49,231 | $683.3K | <0.01% | -26.7% |
| 78 | VICTORY CAPITAL MANAGEMENT#78 · 46,394 sh | 46,394 | $643.9K | <0.01% | +137.7% |
| 79 | Quantinno Capital Management#79 · 45,220 sh | 45,220 | $627.7K | <0.01% | -58.5% |
| 80 | Engineers Gate Manager#80 · 41,960 sh | 41,960 | $582.4K | <0.01% | +43.2% |
| 81 | OPPENHEIMER#81 · 41,501 sh | 41,501 | $576.0K | — | +55.7% |
| 82 | GREAT WEST LIFE ASSURANCE#82 · 39,225 sh | 39,225 | $544.0K | <0.01% | 0.0% |
| 83 | New Age Alpha Advisors#83 · 37,712 sh | 37,712 | $523.4K | 0.02% | New |
| 84 | Numerai GP#84 · 36,370 sh | 36,370 | $504.8K | 0.04% | New |
| 85 | ExodusPoint Capital Management#85 · 34,982 sh | 34,982 | $485.6K | <0.01% | -34.7% |
| 86 | Salvus Wealth Management#86 · 34,826 sh | 34,826 | $483.4K | — | -8.2% |
| 87 | OCCUDO QUANTITATIVE STRATEGIES#87 · 33,639 sh | 33,639 | $466.9K | 0.02% | New |
| 88 | PNC FINANCIAL SERVICES GROUP#88 · 32,422 sh | 32,422 | $450.0K | <0.01% | +0.4% |
| 89 | GROUP ONE TRADING, L.P.#89 · 31,841 sh | 31,841 | $442.0K | <0.01% | New |
| 90 | THRIVENT FINANCIAL FOR LUTHERANS#90 · 31,369 sh | 31,369 | $435.0K | <0.01% | -1.0% |
| 91 | VANGUARD ASSET MANAGEMENT, Ltd#91 · 30,615 sh | 30,615 | $424.9K | <0.01% | 0.0% |
| 92 | Creative Planning#92 · 29,616 sh | 29,616 | $411.1K | <0.01% | +27.1% |
| 93 | Zurcher Kantonalbank (Zurich Cantonalbank)#93 · 28,773 sh | 28,773 | $399.4K | <0.01% | +21.6% |
| 94 | MetLife Investment Management#94 · 28,551 sh | 28,551 | $396.3K | <0.01% | +4.3% |
| 95 | BARCLAYS PLC#95 · 28,294 sh | 28,294 | $392.7K | <0.01% | +26.3% |
| 96 | LAZARD ASSET MANAGEMENT#96 · 26,582 sh | 26,582 | $369.0K | <0.01% | New |
| 97 | PRAIRIEVIEW WEALTH PARTNERS#97 · 25,742 sh | 25,742 | $357.3K | 0.27% | -13.4% |
| 98 | SHRIER WEALTH MANAGEMENT#98 · 23,453 sh | 23,453 | $325.5K | — | +33.1% |
| 99 | Texas Yale Capital#99 · 23,000 sh | 23,000 | $319.2K | <0.01% | 0.0% |
| 100 | MIRAE ASSET GLOBAL ETFS Ltd.#100 · 22,712 sh | 22,712 | $315.2K | <0.01% | -0.7% |
Funds that sold out of CCOI in Q2 2026 (47)
Held CCOI at the end of Q1 2026 and filed a Q2 2026 13F without it. Not in the list above, because they no longer hold it. Largest prior position first.
| Institution | Shares sold | Value in Q1 2026 |
|---|---|---|
| DigitalBridge Group1,142,952 sh | 1,142,952 | $21.5M |
| 683 Capital Management450,300 sh | 450,300 | $8.5M |
| BLUEFIN CAPITAL MANAGEMENT132,304 sh | 132,304 | $2.5M |
| Man Group plc90,227 sh | 90,227 | $1.7M |
| ARISTEIA CAPITAL, L.L.C.58,993 sh | 58,993 | $1.1M |
| Caption Management55,000 sh | 55,000 | $1.0M |
| Corient Private Wealth47,645 sh | 47,645 | $897.6K |
| Navis Wealth Advisors39,500 sh | 39,500 | $744.2K |
| ALTFEST L J30,291 sh | 30,291 | $570.7K |
| REAVES W H28,098 sh | 28,098 | $529.4K |
| GSA CAPITAL PARTNERS LLP22,317 sh | 22,317 | $420.0K |
| Point72 Asset Management, L.P.20,000 sh | 20,000 | $376.8K |
| Bridgefront Capital19,743 sh | 19,743 | $372.0K |
| Counterpoint Mutual Funds18,123 sh | 18,123 | $341.4K |
| Weiss Asset Management16,920 sh | 16,920 | $318.8K |
| Virtu Financial16,657 sh | 16,657 | $314.0K |
| INCEPTIONR15,123 sh | 15,123 | $284.9K |
| NATIXIS ADVISORS14,900 sh | 14,900 | $281.0K |
| Handelsbanken Fonder AB14,030 sh | 14,030 | $264.0K |
| Magnetar Financial13,846 sh | 13,846 | $260.9K |
| TWO SIGMA SECURITIES12,983 sh | 12,983 | $244.6K |
| FORA Capital10,044 sh | 10,044 | $189.4K |
| Walleye Trading7,137 sh | 7,137 | $134.5K |
| RESOURCES MANAGEMENT /CT5,869 sh | 5,869 | $111.0K |
| MACQUARIE GROUP LTD5,223 sh | 5,223 | $98.4K |
| QUADRANT CAPITAL GROUP20 sh | 20 | $49.2K |
| NOMURA ASSET MANAGEMENT LTD2,000 sh | 2,000 | $37.7K |
| VAN ECK ASSOCIATES903 sh | 903 | $16.0K |
| MAI Capital Management352 sh | 352 | $6.6K |
| BankPlus Department237 sh | 237 | $4.5K |
| Owl Creek Wealth Partners235 sh | 235 | $4.4K |
| NBC SECURITIES230 sh | 230 | $4.3K |
| TWIN PEAKS WEALTH ADVISORS184 sh | 184 | $3.5K |
| Parkside Financial Bank79 sh | 79 | $1.5K |
| LRI Investments57 sh | 57 | $1.1K |
| Rachor Investment Advisory Services37 sh | 37 | $698.00 |
| Cedar Mountain Advisors24 sh | 24 | $452.00 |
| Golden State Equity Partners20 sh | 20 | $376.00 |
| Whipplewood Advisors19 sh | 19 | $358.00 |
| Root Financial Partners15 sh | 15 | $283.00 |
| HARBOUR INVESTMENTS12 sh | 12 | $226.00 |
| Kilter Group10 sh | 10 | $189.00 |
| Ronald Blue6 sh | 6 | $113.00 |
| Hughes Financial Services3 sh | 3 | $57.00 |
| Dunhill Financial1 sh | 1 | $30.00 |
| GILPIN WEALTH MANAGEMENT1 sh | 1 | $19.00 |
| Capital Advisors, Ltd.8 sh | 8 | $0.00 |
Source: Form 13F-HR filings on SEC EDGAR, Q2 2026. Values are as reported by each manager at quarter end. “% of portfolio” is the position’s share of the manager’s total reported 13F value for the same quarter. “New” means the manager filed a 13F for Q1 2026 without this position; a dash means no comparison is available. Where a manager’s own filing is internally inconsistent its value is withheld and it is listed last. 13F data shows reported holdings, not recommendations.