DOSSIER · 13F Holders · Q2 2026Communication Services · Communications Services, NEC
CCOI

COGENT COMMUNICATIONS HLDGS

248 institutions still hold COGENT COMMUNICATIONS HLDGS as of Q2 2026. Tracked across SEC 13F-HR filings, with insider and 13D/G activity surfaced alongside.

CUSIP 19239V302·Communications Services, NEC·248 13F holders·last filed Jun 30, 2026
Market cap
13F value held
$525M
visible holders
Holders
248
filers reporting
Concentration
19.48%
BlackRock, Inc. #1
top holder share
AI Holders Summary · Q2 2026

248 institutions reported CCOI in Q2 2026. BlackRock, Inc. leads at 19.5% of the visible book.

Top holders

Sorted by position value. Source: SEC EDGAR 13F-HR filings.

#HolderValueShares% port.Quarter
01
BlackRock, Inc.
CIK 0002012383
$102M7.4M0.00%Q2 2026
02
Turtle Creek Asset Management Inc.
CIK 0001484148
$58M4.2M2.28%Q2 2026
03
Park West Asset Management LLC
CIK 0001386928
$43M3.1M2.94%Q2 2026
04
EdgePoint Investment Group Inc.
CIK 0001481669
$43M2.3M0.34%Q1 2026
05
STATE STREET CORP
CIK 0000093751
$39M2.8M0.00%Q2 2026
06
Vanguard Portfolio Management
CIK 0002100121· Index
$33M2.4M0.00%Q2 2026
07
VANGUARD CAPITAL MANAGEMENT LLC
CIK 0002100119· Index
$28M2.0M0.00%Q2 2026
08
Newtyn Management, LLC
CIK 0001569241
$23M1.7M2.87%Q2 2026
09
CITADEL ADVISORS LLC
CIK 0001423053
$23M1.6M0.00%Q2 2026
10
GEODE CAPITAL MANAGEMENT, LLC
CIK 0001214717· Index
$17M1.2M0.00%Q2 2026
11
MAGNOLIA GROUP, LLC
CIK 0001618376
$14M980K2.86%Q2 2026
12
GOLDMAN SACHS GROUP INC
CIK 0000886982
$14M973K0.00%Q2 2026
13
JANE STREET GROUP, LLC
CIK 0001595888· Market maker
$13M701K0.00%Q1 2026
14
Oakum Bay Capital LLC
CIK 0001571727
$13M690K6.97%Q1 2026
15
683 Capital Management, LLC
CIK 0001404574
$13M600K0.56%Q4 2025
16
CHARLES SCHWAB INVESTMENT MANAGEMENT INC
CIK 0000884546· Index
$11M805K0.00%Q2 2026
17
GILDER GAGNON HOWE & CO LLC
CIK 0000902464
$11M784K0.11%Q2 2026
18
SUSQUEHANNA INTERNATIONAL GROUP, LLP
CIK 0001446194· Market maker
$10M692K0.00%Q2 2026
19
Broad Run Investment Management, LLC
CIK 0001568621
$9M660K1.41%Q2 2026
20
MORGAN STANLEY
CIK 0000895421
$9M628K0.00%Q2 2026
Page 1 of 13
228 more holders available. Log in →
Insiders at COGENT COMMUNICATIONS HLDGS
Weed Thaddeus GerardHowell Deneen CBrooks Steven DHoward Eve NDe Sa PaulMontagner MarcKennedy Sheryl LynnFerguson Lewis H