Security key
19239V302
COGENT COMMUNICATIONS HOLDINGS, INC. - COMMON STOCK (CCOI)
CUSIP: 19239V302
Q2 2026 13F Holders as of 30 Jun 2026
- Security type / class
- Equity / COMMON STOCK
- Total 13F shares
- 47,277,194
- Total 13F value
- $656,269,450
- Share change
- -1,004,250
- Put/Call ratio
- 139%
- SEC-reported price per share
- $13.88
- Number of holders
- 223
- Value change
- -$25,188,613
- Number of buys
- 115
- Number of sells
- 117
- Shares outstanding
- 50,534,473
Holder snapshot
7 signals
Open additional details 1 more signal available
Security identity
Names, identifiers, and filing context for this profile.
1 source field
Report period
Q2 2026
Institutions
223
Top holders
10
CCOI full security history
Ownership snapshot
Full 13F holder table
COGENT COMMUNICATIONS HOLDINGS, INC. SEC filings
COGENT COMMUNICATIONS HOLDINGS, INC. company facts
Broader feeds
Ownership snapshot
Top reported holders of CCOI - COGENT COMMUNICATIONS HOLDINGS, INC. - COMMON STOCK (13F + 13D/G + 3/4/5)
Grouped by holder across the latest SEC ownership disclosures. Start with comparable ownership when available, then verify the linked 13F, 13D/G, or 3/4/5 evidence.
Comparable stake leader
BlackRock, Inc.
Disclosed value leader
BlackRock, Inc.
Comparable rows
15/15
Latest evidence
30 Jun 2026
13D/G
13F
3/4/5
Lead comparable stake: 14%
13D/G row: BlackRock, Inc.
Showing 1-6 of 15 holder rows.
Quick read
BlackRock, Inc. leads the comparable SEC ownership view at 14%.
15 of 15 rows have a safely comparable ownership percentage. Use this as a filing-backed starting point, then open the detailed table for source links, reporting role, position value, share count, and filing date.
Open SEC evidence
Opens BlackRock, Inc.'s linked filing trail.
Comparable ownership
Top 5
BlackRock, Inc.
14%
Turtle Creek Asset Management Inc.
8.2%
Park West Asset Management LLC
5.6%
STATE STREET CORP
5.5%
VANGUARD PORTFOLIO MANAGEMENT LLC
4.8%
Ownership % is shown only when SEC disclosures are safely comparable across share classes.
Detailed SEC evidence table Showing 1-6 of 15 holder rows
| Holder | Evidence | Ownership % | Position | 12M Net Δ | As of |
|---|---|---|---|---|---|
| BlackRock, Inc. |
13D/G
13F
Company
|
14%
|
$152,394,639
7,068,397 shares
|
+$14,455,053 | 31 Dec 2025 |
| Turtle Creek Asset Management Inc. |
13D/G
13F
Company
|
8.2%
|
$87,034,421
4,036,847 shares
|
-$12,226,374 | 31 Dec 2025 |
| Park West Asset Management LLC |
13D/G
13F
Company
|
5.6%
|
$48,325,158
2,806,339 shares
|
+$4,474,341 | 10 Jun 2026 |
| STATE STREET CORP |
13F
13D/G
Company · STATE STREET CORPORATION
|
5.5%
from 13D/G
|
$42,828,313
2,273,265 shares
|
— | 31 Mar 2026 |
| VANGUARD PORTFOLIO MANAGEMENT LLC |
13F
13D/G
Company · Vanguard Portfolio Management
|
4.8%
from 13D/G
|
$51,786,620
2,748,759 shares
|
— | 31 Mar 2026 |
| Dave Schaeffer |
3/4/5
CHAIRMAN, CEO, AND PRESIDENT, Director
|
3.7%
|
$35,195,625
1,868,133 shares
|
— | 04 May 2026 |
How to read this table
Rows are grouped by holder and ranked first by SEC-reported ownership % when it is safely comparable, then by disclosed holdings value. — indicates unavailable or non-comparable values; "mixed-class rows" means the latest filing spans non-comparable classes.
13F holder rows
Institutional holders as of Q2 2026
Investor-level positions for this CUSIP, loaded as an interactive table.
Institutions
223
Shares
47,277,194
Rows available
223
| Investor | Option | Weight % | Change % | SEC-reported value | * Price | Shares | Share Change | Activity | Report Period |
|---|
* SEC-reported price is the security price as of the portfolio date and can indicate the last known price at which the security was still held. The marker flags a reported price that did not pass the local price check.
Compare Q2 2026 vs Q1 2026 Across Filers
Q1 2026 holders
230
Q2 2026 holders
223
Holder diff
-7
| Investor | Q1 2026 Shares | Q2 2026 Shares | Share Diff | Share Chg % | Q1 2026 value | Q2 2026 value | Value change | Value Chg % |
|---|