COGENT COMMUNICATIONS HOLDINGS, INC. - COMMON STOCK, PAR VALUE $0.001 PER SHARE (CCOI)

Q: What does CUSIP 19239V302 represent in this 13F holders report?

CUSIP 19239V302 is the security identifier for CCOI - COGENT COMMUNICATIONS HOLDINGS, INC. - COMMON STOCK, PAR VALUE $0.001 PER SHARE used to aggregate holder disclosures.

Q: How many institutions held CCOI - COGENT COMMUNICATIONS HOLDINGS, INC. - COMMON STOCK, PAR VALUE $0.001 PER SHARE in Q2 2026?

2 institutional investors reported CCOI - COGENT COMMUNICATIONS HOLDINGS, INC. - COMMON STOCK, PAR VALUE $0.001 PER SHARE for Q2 2026. Use the holders table for investor-level position and value details.

CUSIP: 19239V302

Q2 2026 13F Holders as of 30 Jun 2026

Security type / class: Equity / COMMON STOCK, PAR VALUE $0.001 PER SHARE
Total 13F shares: 986
Total 13F value: $13,686
Share change: +39
SEC-reported price per share: $13.88
Number of holders: 2
Value change: +$423
Number of buys: 1
Number of sells: 2
Shares outstanding: 50,113,196

Security key

19239V302

Report period

Q2 2026

Institutions

Top holders

CCOI full security history Ownership snapshot Full 13F holder table Previous quarter: Q1 2026 COGENT COMMUNICATIONS HOLDINGS, INC. SEC filings COGENT COMMUNICATIONS HOLDINGS, INC. company facts

Broader feeds

Latest 13F filings Latest 13D/G filings Investors directory

Reporting periods

Holder history for CUSIP 19239V302

Previous quarter: Q1 2026

Recent filing periods:

Q2 2026 Q1 2026 Q4 2025 Q3 2025 Q2 2025 Q1 2025 Q4 2024 Q3 2024

Ownership snapshot

Top reported holders of CCOI - COGENT COMMUNICATIONS HOLDINGS, INC. - COMMON STOCK, PAR VALUE $0.001 PER SHARE (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%

VANGUARD PORTFOLIO MANAGEMENT LLC 5.6%

Dave Schaeffer 3.7%

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 13D/G 13F	14%	$152,394,639 7,068,397 shares	+$14,455,053	31 Dec 2025
Turtle Creek Asset Management Inc.	13D/G 13F Company 13D/G 13F	8.2%	$87,034,421 4,036,847 shares	-$12,226,374	31 Dec 2025
Park West Asset Management LLC	13D/G 13F Company 13D/G 13F	5.6%	$48,325,158 2,806,339 shares	+$4,474,341	10 Jun 2026
VANGUARD PORTFOLIO MANAGEMENT LLC	13D/G 13F Vanguard Portfolio Management · Company 13D/G 13F	5.6%	$52,585,115 2,791,142 shares	$0	31 Mar 2026
Dave Schaeffer	3/4/5 CHAIRMAN, CEO, AND PRESIDENT, Director 3/4/5	3.7%	$35,195,625 1,868,133 shares	-$82,525,807	04 May 2026
Thaddeus G. Weed	3/4/5 VICE PRESIDENT, CFO 3/4/5	0.39%	$3,322,859 197,900 shares	-$547,519	16 Jun 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

986

Rows available

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

Holder diff

-228

Investor	Q1 2026 Shares	Q2 2026 Shares	Share Diff	Share Chg %	Q1 2026 value	Q2 2026 value	Value change	Value Chg %

Trend: ostatnie 8 kwartałów (+ wybrane okresy porównania).

Quarterly Holders Trend

Quarterly Value Trend

Quarterly Shares Trend