As of November 6, 2026, Cogent Communications Holdings, Inc. is a publicly traded company (Nasdaq: CCOI); its largest reported holder is Turtle Creek Asset Management Inc., with 8.2% on Schedule 13G/A of February 17, 2026, then BlackRock (7.7%). The largest insider holding is Dave Schaeffer, the chairman and chief executive, with 1,868,133 shares (3.6% of shares outstanding), per Form 4 of May 4, 2026 (Schedule 13G/A, February 17, 2026).
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Is Cogent Communications Holdings, Inc. a real, registered company?
- Cogent Communications Holdings, Inc. files with the SEC under CIK 1158324 (its SEC filings).
- Its shares are listed under the ticker CCOI on Nasdaq (SEC company record).
- Incorporated in Delaware; business address in Washington, District of Columbia, as its SEC filings state.
- Court and bankruptcy records: see Before you sign or pay below.
Before you sign or pay
- Court and bankruptcy: No federal court case or bankruptcy filing found under COGENT COMMUNICATIONS HOLDINGS, INC. in our court records and SEC 8-K records (as of 2026-11-06).
- Ownership: 5%+ holders are reported on Schedule 13D or 13G; the latest names BlackRock (filed 2026-10-05).
Who are Cogent Communications Holdings, Inc.'s owners and officers?
Cogent Communications Holdings, Inc.: incorporated in Delaware; business address in Washington, District of Columbia; industry Communications Services, NEC (Schedule 13G/A, 2026-10-05).
| Report | Holder | Share |
|---|---|---|
| Schedule 13G/A, 2026-10-05 | Blackrock, Inc. | 7.7% |
| Schedule 13G, 2026-08-07 | State Street Corporation | 5.5% |
| Schedule 13G/A, 2026-07-31 | Vanguard Portfolio Management | 4.85% |
| Schedule 13G/A, 2026-06-17 | Park West Asset Management LLC | 5.6% |
| Schedule 13G, 2026-05-22 | Park West Asset Management LLC | 5.1% |
| Schedule 13G, 2026-04-29 | Vanguard Portfolio Management | 5.57% |
| Schedule 13G/A, 2026-03-26 | The Vanguard Group | 0% |
| Schedule 13G/A, 2026-02-17 | Turtle Creek Asset Management Inc. | 8.2% |
| Schedule 13G/A, 2026-01-23 | Blackrock, Inc. | 14.4% |
| Schedule 13G/A, 2025-11-14 | Turtle Creek Asset Management Inc. | 9.4% |
| Schedule 13G, 2025-08-14 | Turtle Creek Asset Management Inc. | 5.7% |
| Schedule 13G/A, 2025-07-18 | Blackrock, Inc. | 13% |
Questions about who owns Cogent Communications Holdings, Inc.
Who owns Cogent Communications Holdings, Inc.?
On this page, 4 holders' latest ownership filings report 5% or more of Cogent Communications Holdings, Inc.: Turtle Creek Asset Management Inc. (8.2%, Schedule 13G/A, filed 2026-02-17), Blackrock, Inc. (7.7%, Schedule 13G/A, filed 2026-10-05), Park West Asset Management LLC (5.6%, Schedule 13G/A, filed 2026-06-17) and State Street Corporation (5.5%, Schedule 13G, filed 2026-08-07).
Who are the largest shareholders of Cogent Communications Holdings, Inc.?
By the share each holder's latest filing reports, the largest holders of Cogent Communications Holdings, Inc. on this page are Turtle Creek Asset Management Inc. (8.2%), Blackrock, Inc. (7.7%) and Park West Asset Management LLC (5.6%).
When did Turtle Creek Asset Management Inc. buy into Cogent Communications Holdings, Inc.?
The filings give report dates, not purchase dates. The earliest filing from Turtle Creek Asset Management Inc. on this page is the Schedule 13G, filed 2025-08-14, reporting 5.7%; its latest, Schedule 13G/A filed 2026-02-17, reports 8.2%.
Is this an audit or a full list?
Neither. The ownership list on this page covers only Schedule 13D and 13G filings, which holders make once they own 5% or more of a class of shares (an amendment can report a stake that has since fallen below 5%); 12 such filings are shown here. It is not an audit and not a full cap table: holders who never reached 5% are not listed, and a stake can change after its latest filing.
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What the Full Report on Cogent Communications Holdings, Inc. covers
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Which Company This Is
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The Money: Funding, Valuation, Runway
Who Pays Them, And Who They Are Up Against
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Which insiders own Cogent Communications Holdings, Inc. shares?
Directors, officers and holders of 10% or more report their shares on Forms 3, 4 and 5. Each line is the latest such report, largest holding first.
- , the chairman and chief executive: 1,868,133 shares (3.6% of shares outstanding), 609,143 held directly and 1,258,990 indirectly (Form 4, 2026-05-04).
- , the president and chief financial officer: 193,050 shares (0.38% of shares outstanding) (Form 4, 2026-09-03).
- , the vice president and chief legal officer: 190,717 shares (0.37% of shares outstanding), 188,847 held directly and 1,870 indirectly (Form 4, 2026-01-05).
- , the vice president and chief revenue officer: 110,168 shares (0.22% of shares outstanding) (Form 4, 2026-01-05).
- , a director: 103,287 shares (0.20% of shares outstanding) (Form 4, 2026-09-30).
Shares outstanding: 51,203,883 as of 2026-10-31, from the company's latest SEC cover page.
How much has Cogent Communications Holdings, Inc. raised?
No fundraising or offering filing from Cogent Communications Holdings, Inc. is on file with us.
Keep reading
More on Cogent Communications Holdings, Inc. and the records around it.
Cogent Communications Holdings, Inc. elsewhere on the record
- 5%+ stake filings Oct 2026
Companies that share a holder
- Park West Asset Management LLC also filed stake reports on 2 other companies: Porch Group, Inc. (Jun 2026)
- Turtle Creek Asset Management Inc. also filed stake reports on 6 other companies: ENCORE CAPITAL GROUP, INC. (Feb 2026), BRP Inc. (Nov 2025), JELD-WEN Holding, Inc. (Aug 2025)
- STATE STREET CORPORATION also filed stake reports on 343 other companies: TRADE DESK INC/THE (Oct 2026), CENTRUS ENERGY CORP (Sep 2026), ACADIA PHARMACEUTICALS INC (Aug 2026)
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