Cogent Communications Holdings, Inc (CCOI) Ownership
CCOI ownership summary
as of October 18, 2026- Institutions
- 95.4% of shares outstanding
- Insiders
- 4.12% of shares outstanding
- Shares outstanding
- 51.2M
- Float
- 42.0M shares available to trade
- Short interest
- 16.25% 6.0M shares short
- Days to cover
- 2.68 short interest down 12.5% vs prior month
- Institutions 95.44%
- Insiders 4.12%
- Other investors 0.45%
CCOI top institutional holders
20 largest| # | Holder | % of shares | Shares | Value | Change | Reported |
|---|---|---|---|---|---|---|
| 1 | BlackRock Inc | 14.40% | 7.4M | $59.5M | +301,012 (+4.3%) | June 30, 2026 |
| 2 | Turtle Creek Asset Management Inc. | 8.21% | 4.2M | $33.9M | −145,370 (−3.3%) | June 30, 2026 |
| 3 | Park West Asset Management LLC | 6.07% | 3.1M | $25.1M | +1.2M (+60.5%) | June 30, 2026 |
| 4 | State Street Corp | 5.43% | 2.8M | $22.4M | +506,102 (+22.3%) | June 30, 2026 |
| 5 | Vanguard Portfolio Management, LLC | 4.66% | 2.4M | $19.2M | −363,830 (−13.2%) | June 30, 2026 |
| 6 | EdgePoint Investment | 4.46% | 2.3M | $18.4M | — | June 30, 2026 |
| 7 | Vanguard Capital Management, LLC | 3.98% | 2.0M | $16.4M | −82,815 (−3.9%) | June 30, 2026 |
| 8 | Newtyn Management LLC | 3.23% | 1.7M | $13.4M | +55,895 (+3.5%) | June 30, 2026 |
| 9 | Geode Capital Management, LLC | 2.43% | 1.2M | $10.1M | +39,810 (+3.3%) | June 30, 2026 |
| 10 | Citadel Advisors Llc | 2.29% | 1.2M | $9.5M | +746,261 (+175.1%) | June 30, 2026 |
| 11 | Magnolia Group, LLC | 1.91% | 980K | $7.9M | −310,518 (−24.1%) | June 30, 2026 |
| 12 | The Goldman Sachs Group Inc | 1.90% | 973K | $7.9M | +260,204 (+36.5%) | June 30, 2026 |
| 13 | Charles Schwab Investment Management Inc | 1.57% | 805K | $6.5M | +45,127 (+5.9%) | June 30, 2026 |
| 14 | Gilder Gagnon Howe & CO LLC | 1.53% | 784K | $6.3M | +284,493 (+57.0%) | June 30, 2026 |
| 15 | Oakum Bay Capital LLC | 1.35% | 690K | $5.6M | +146,792 (+27.0%) | March 31, 2026 |
| 16 | Broad Run Investment Management, LLC | 1.29% | 660K | $5.3M | −3,070 (−0.5%) | June 30, 2026 |
| 17 | Morgan Stanley - Brokerage Accounts | 1.23% | 628K | $5.1M | −1.3M (−66.7%) | June 30, 2026 |
| 18 | AQR Capital Management LLC | 1.20% | 616K | $5.0M | +405,652 (+193.3%) | June 30, 2026 |
| 19 | Harspring Capital Management LLC | 1.17% | 599K | $4.8M | −487,582 (−44.9%) | June 30, 2026 |
| 20 | HRT FINANCIAL LLC | 1.09% | 558K | $4.5M | +48,579 (+9.5%) | June 30, 2026 |
Value at the latest close. Change = shares bought or sold in the latest quarterly filing (13F). In the top 20, 12 holders added 4.0M shares and 7 cut 2.6M.
CCOI top mutual fund and ETF holders
20 largest| # | Holder | % of shares | Shares | Value | Change | Reported |
|---|---|---|---|---|---|---|
| 1 | EdgePoint Global Growth & Inc Port Sr F | 3.74% | 1.9M | $15.5M | — | March 31, 2026 |
| 2 | Vanguard MStar Total Stk Mkt Idx Invest | 2.81% | 1.4M | $11.6M | — | August 31, 2026 |
| 3 | iShares Russell 2000 ETF | 2.51% | 1.3M | $10.4M | −14,784 (−1.1%) | September 30, 2026 |
| 4 | State Street® SPDR® S&P® Telecom ETF | 1.10% | 563K | $4.5M | +5,369 (+1.0%) | September 30, 2026 |
| 5 | Vanguard Small Cap Index | 1.07% | 548K | $4.4M | −489,479 (−47.2%) | September 30, 2026 |
| 6 | Fidelity Small Cap Index | 1.06% | 542K | $4.4M | +5,449 (+1.0%) | July 31, 2026 |
| 7 | Hennessy Focus Investor | 0.96% | 492K | $4.0M | — | September 30, 2026 |
| 8 | iShares Russell 2000 Growth ETF | 0.91% | 467K | $3.8M | −592 (−0.1%) | September 30, 2026 |
| 9 | Schwab Fundamental U.S. Small CompanyETF | 0.75% | 384K | $3.1M | +539 (+0.1%) | September 30, 2026 |
| 10 | EdgePoint Cdn Growth & Income Port Sr F | 0.68% | 351K | $2.8M | — | March 31, 2026 |
| 11 | American Funds SMALLCAP World A | 0.64% | 330K | $2.7M | +329,600 (0.0%) | September 30, 2026 |
| 12 | Vanguard MStar Small Cap Growth Indx Inv | 0.60% | 305K | $2.5M | −287,467 (−48.5%) | September 30, 2026 |
| 13 | Vanguard Russell 2000 ETF | 0.56% | 287K | $2.3M | +3,702 (+1.3%) | September 30, 2026 |
| 14 | Jupiter Merian Glb Eq Abs Rt I USD Acc | 0.47% | 242K | $2.0M | +242,158 (0.0%) | December 31, 2025 |
| 15 | Fidelity Extended Market Index | 0.46% | 236K | $1.9M | +57,570 (+32.3%) | August 31, 2026 |
| 16 | Schwab US Small-Cap ETF™ | 0.46% | 235K | $1.9M | +153 (+0.1%) | September 30, 2026 |
| 17 | Herald Ord | 0.39% | 200K | $1.6M | — | March 31, 2026 |
| 18 | Vanguard Communication Services ETF | 0.36% | 182K | $1.5M | +6,348 (+3.6%) | September 30, 2026 |
| 19 | Bridge Builder Small/Mid Cap Value | 0.34% | 174K | $1.4M | +174,494 (0.0%) | September 30, 2026 |
| 20 | Goldman Sachs Small Cap Eq Insghts Instl | 0.31% | 158K | $1.3M | +134,525 (+582.1%) | July 31, 2026 |
Funds report holdings monthly or quarterly; dates differ by fund.
CCOI insider transactions
latest 20| Date | Name | Transaction | Price | Shares | Value |
|---|---|---|---|---|---|
| 2026-03-06 | Henry W Kilmer | Sell | $23.35 | 2,400 | $56,040 |
| 2026-03-05 | Lewis H Ferguson | Sell | $23.03 | 2,206 | $50,804 |
| 2026-03-05 | Sheryl Lynn Kennedy | Sell | $22.99 | 3,300 | $75,867 |
| 2026-03-05 | Thaddeus Gerard Weed | Sell | $22.63 | 4,850 | $109,756 |
| 2025-12-02 | Lewis H Ferguson | Sell | $20.34 | 4,000 | $81,360 |
| 2025-11-11 | Sheryl Lynn Kennedy | Sell | $21.34 | 2,400 | $51,216 |
| 2025-09-05 | Henry W Kilmer | Sell | $36.99 | 2,400 | $88,776 |
| 2025-08-21 | Sheryl Lynn Kennedy | Sell | $36.35 | 2,000 | $72,700 |
| 2025-08-08 | Dave Schaeffer | Sell | $27.50 | 818,909 | $22.5M |
| 2025-08-07 | Dave Schaeffer | Sell | $32.60 | 1,840,669 | $60.0M |
| 2025-06-16 | Dave Schaeffer | Sell | $47.11 | 70,000 | $3.3M |
| 2025-06-13 | Dave Schaeffer | Sell | $47.40 | 55,000 | $2.6M |
| 2025-06-11 | Dave Schaeffer | Sell | $48.51 | 55,000 | $2.7M |
| 2025-06-09 | Dave Schaeffer | Sell | $48.64 | 55,000 | $2.7M |
| 2025-06-09 | Thaddeus Gerard Weed | Sell | $48.04 | 4,900 | $235,396 |
| 2025-06-06 | Dave Schaeffer | Sell | $47.78 | 80,000 | $3.8M |
| 2025-06-06 | Henry W Kilmer | Sell | $47.95 | 2,400 | $115,080 |
| 2025-06-04 | Dave Schaeffer | Sell | $47.76 | 75,000 | $3.6M |
| 2025-06-04 | James Bubeck | Sell | $47.50 | 2,000 | $95,000 |
| 2025-05-28 | Lewis H Ferguson | Sell | $47.57 | 1,100 | $52,327 |
Reported trades by company officers, directors and other filers (including disclosures by members of Congress where EODHD lists them). "—" where the filing gives no share count.
CCOI shares outstanding
Year-end shares outstanding, adjusted for splits.
Who owns CCOI
Institutional investors own 95.4% of Cogent Communications's shares and insiders 4.12%. The largest holder is BlackRock Inc with 14.40% of the shares (7.4M), as of June 30, 2026. Among the top 20 institutions, 12 added shares and 7 reduced their stake in the latest filings. Short interest is 16.25% of the float, or 2.68 days of average trading volume. The share count rose 5.5% since 2014.
Related: CCOI analyst forecast, CCOI key metrics, CCOI dividend history. See the CCOI stock overview for the latest quote and news.
CCOI ownership FAQ
Who owns the most Cogent Communications stock?
The largest shareholders of Cogent Communications are BlackRock Inc (14.40%), Turtle Creek Asset Management Inc. (8.21%), Park West Asset Management LLC (6.07%), State Street Corp (5.43%), Vanguard Portfolio Management, LLC (4.66%).
What percentage of Cogent Communications is owned by institutions?
Institutions hold 95.4% of Cogent Communications's shares outstanding; insiders hold 4.12%.
Which funds own Cogent Communications?
The largest fund holders of Cogent Communications are EdgePoint Global Growth & Inc Port Sr F (3.74%), Vanguard MStar Total Stk Mkt Idx Invest (2.81%), iShares Russell 2000 ETF (2.51%), State Street® SPDR® S&P® Telecom ETF (1.10%), Vanguard Small Cap Index (1.07%).
What is Cogent Communications's short interest?
6.0M shares of Cogent Communications were sold short, 16.25% of the float; at the average daily volume it would take 2.68 days to cover.
Are insiders buying or selling Cogent Communications?
Of the latest 20 reported insider transactions in Cogent Communications (since May 28, 2025), 0 were purchases and 20 were sales.
How many shares of Cogent Communications are outstanding?
Cogent Communications has 51.2M shares outstanding, of which 42.0M are in the public float.