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Schedule 13G/A

CCOI Schedule 13G/A filing by BlackRock

BlackRock reported beneficial ownership of 3.9M shares, representing 7.7% of COGENT COMMUNICATIONS HOLDINGS, INC. in this filing.

FiledOct 5, 2026
Ownership dateSep 30, 2026
Reported shares3.9M
Reported ownership7.7%
Ownership details

Voting and dispositive power reported in the filing

These figures describe the reporting filer’s disclosed voting and investment authority. They should be read together with the reported share count and percentage.

Sole voting power 3.9M
Shared voting power 0
Sole dispositive power 3.9M
Shared dispositive power 0
Compared with the prior filing

How the reported position changed

This compares the current filing with the previous tracked Schedule 13 filing from the same reporting CIK for CCOI. A change between filings does not by itself establish when shares were bought or sold.

Previous filingJan 23, 2026
Reported share change-3,135,920
Ownership percentage change-6.7 pts
Previous filingThis filing
Reported shares7.1M3.9M
Reported ownership14.4%7.7%
Price context

Price dates alongside the ownership filing

Price data provides market context around the disclosure. It does not identify the filer’s actual transaction price.

Close near filing date$8.46as of Oct 2, 2026
Latest stored close$8.54as of Oct 9, 2026View live quote ↗
Source

Original filing and accession

Use the SEC filing as the primary source when you need the complete disclosure, footnotes, exhibits, or reporting-person details.

Reporting filer
BlackRock
CIK
CIK0002012383
Accession
0002012383-26-003317
Form
Schedule 13G/A
Read the filing in context

Understand what a Schedule 13 filing does—and does not—tell you.