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CCOI · Cogent Communications Holdings, Inc. · Holdings

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$7.47 +0.11 (+1.49%) At close · Oct 27 Q2 2026 earnings call transcript
Russell 2000 member Rebalance outlook locked
Market Cap
$382.58M
Shares
51.22M
Volume · Oct 27 2.23M Avg daily vol (3M) 1.95M

Institutional ownership from SEC Form 13F filings. Investment managers with more than $100 million in U.S. equities must disclose their positions every quarter, within 45 days of quarter-end, so the holdings shown can lag the market by up to a quarter.

Use institutional holdings through the 13F API or MCP → See every holder of CCOI: 13F, 13D and 13G, insiders and funds →
Recent SEC filings are still being reconciled. Holder totals and changes may be incomplete until processing catches up.
The Sep 30, 2026 filing window is still open — showing the latest known positions. Funds that have not filed yet carry their prior-quarter positions; a fund that filed without this stock counts as sold out. Each fund's Change is measured against its own previous reported quarter, shown in the Reported column. Pick a completed quarter in the Quarter selector below to put every fund on one quarter and see the stock-wide activity breakdown.
Holders: 222
Total Value: $668,544,761
Total Shares: 48,304,017
Showing 1–100 of 232 holdings by value · page 1 of 3

Institutional Ownership Trend

27 quarters

Holder Concentration

Across 228 13F filers
Top Holder
15.2%
Sep 2023 → Jun 2026 · range 12.9% – 16.6%
of institutional value
Top 5
40.9%
Sep 2023 → Jun 2026 · range 34.2% – 41.0%
of institutional value
Top 10
59.1%
Sep 2023 → Jun 2026 · range 46.3% – 59.1%
of institutional value
HHI
509
Sep 2023 → Jun 2026 · range 405 – 526
Broadly held

Who Holds CCOI

Last 8 quarters through Sep 30, 2026 (filing window open)

Each kind of 13F filer's share of the common shares 13F filers report. Holder type comes from regulatory records, never the filer's name; style, turnover and horizon are measured from each filer's own 13F book. The quarter selector does not change this card.

Jun 30, 2026, the newest closed quarter: 224 filers, like-for-like change -1.6%; actively managed books -1.8%; index-like books -1.2%.

Holder type Share Filers Change
Registered adviser 47.5% 106 +5.2%
Exempt adviser 1.8% 5 +132.1%
Adviser 0.8% 5 -74.9%
Bank 10.2% 16 +7.4%
Insurer 0.6% 2 +0.7%
Broker-dealer 0.3% 2 -30.8%
Benefit plan 0.3% 3 +8.4%
Non-US 10.8% 11 +1.8%
Holding company 19.3% 5 -10.9%
Unknown 8.5% 69 -10.3%

The Sep 30, 2026 filing window is still open, so its bar carries the Jun 30, 2026 positions of filers that have not filed yet.

How the mix is measured

Shares are 13F common shares restated to today's split basis; options and principal amounts are left out. The change compares only filers with a 13F in both quarters and keeps each filer in its bucket of the later quarter on both sides; a filer that continues under a new CIK is compared through its successor. Holder type comes from each filer's current regulatory profile; client base and private funds come from the Form ADV roster current at each quarter end (rosters from December 2019, so an earlier quarter reads Unknown). Style, turnover, horizon and book size are measured from each filer's 13F book in the newest measured quarter, and Not measured means none was. Actively managed books are those measured systematic-like, concentrated or diversified active.

Excluded 2 holders with no observed 2026-03-31 13F and 4 holders with no observed 2026-06-30 13F. Compared across CIK changes: JANUS HENDERSON GROUP PLC continues as Jupiter Topco LLC.

Conviction and Crowding

224 13F filers, quarter ended Jun 30, 2026

Measured across every 13F filer's common-share book once the quarter's filing window closed. Crowding counts filers with high turnover or that advise private funds on Form ADV.

Conviction holders
4
1.79% of filers hold it in their top 10
Mar 31, 2026: 7
Holders above 5%
1
median weight 0.001%
Mar 31, 2026: 2
Crowding
34.2%
of shares outstanding, 87th percentile
Mar 31, 2026: 31.7%
Private-fund advisers
31.0%
of shares outstanding
Institutional ownership
94.4%
99.9% of the estimated free float
Top 10 holders
59.7%
of 13F shares, Herfindahl 0.053
Active holders
-1.8%
like-for-like share change of active filers
5% stakes on record
5
0 13D, 5 13G (4 institutional, 1 passive, 0 exempt)
How long holders have held it value-weighted 11.4 quarters
Under 1 year 25.1% 1 to 3 years 42.6% 3 years or more 32.3% Since coverage start 0.000%

Managers in the top fifth by current three-year FundScore alpha were net sellers of $4,609,798 (0 buying, 1 selling).

Estimated Holder Cost Basis

Quarter ended Jun 30, 2026, on that quarter's share basis

Estimated, never filed: each 13F buy is costed at its quarter's average traded price and each sale keeps the average cost, so this is what holders paid on average if they traded evenly through each quarter.

Estimated avg cost
$37.88
estimated per share
Mar 31, 2026: $42.87
Quarter-end price
$13.88
implied by 13F values
Estimated gain or loss
-63.4%
price against the estimated cost
Estimated at a loss
100.0%
of costed 13F value

Estimated cost covers 49.8% of the 13F shares; positions already held when a filer's 13F history starts, or bought in a quarter without a trusted average price, have no estimate.

Shared Holders

Companies CCOI's active holders also own, quarter ended Jun 30, 2026
# Company Shared holders
1 QDEL QuidelOrtho Corp 3
2 BIO Bio-Rad Laboratories, Inc. 3
3 KMX Carmax Inc 3
4 FND Floor & Decor Holdings, Inc. 3
5 GIL Gildan Activewear Inc. 3
6 SUNB Sunbelt Rentals Holdings, Inc. 3
7 NVR Nvr Inc 3
8 MKL Markel Group Inc. 3
9 BN BROOKFIELD Corp 3
10 AEM Agnico Eagle Mines Ltd 3

Shareholder Targets

13F filers that own its peers but not CCOI, quarter ended Jun 30, 2026

Found through its holder-overlap peers: QDEL, BIO, KMX, FND, GIL, SUNB, NVR, MKL, BN, AEM, AMZN, AMT, GOOGL, ANET, NSC, BKNG, SPGI, META, BMY, MSFT. 7,000 filers in all.

# Filer In peers
1 NORGES BANK Non-US, Index-like $159,395,022,344 19 held
2 Capital Research Global Investors Adviser, Diversified active $131,652,690,871 12 held
3 Capital World Investors Adviser, Diversified active $116,536,668,933 17 held
4 Capital International Investors Adviser, Diversified active $68,280,068,262 12 held
5 Amundi Holding company, Index-like $63,638,530,383 20 held
6 WELLINGTON MANAGEMENT GROUP LLP Holding company, Diversified active $62,349,691,949 17 held
7 FRANKLIN RESOURCES INC Adviser, Diversified active $57,662,893,709 19 held
8 DIMENSIONAL FUND ADVISORS LP Registered adviser, Diversified active $44,854,404,400 20 held
9 Berkshire Hathaway Inc Insurer, Concentrated $37,839,798,880 2 held
10 Fisher Asset Management, LLC Adviser, Diversified active $37,618,273,112 15 held

Fund Ownership of CCOI by Fund Type

Registered funds' Form N-PORT reports for the quarter ended Jun 30, 2026

Index funds and index ETFs hold 27.99% of shares outstanding.

Fund type Of shares outstanding Shares
Index funds 4.48% 2,296,655
Index ETFs 23.50% 12,036,345
Active ETFs 0.02% 10,136
Active funds 2.28% 1,168,759
Unclassified 0.12% 62,890
All registered funds 30.41% 15,574,785
How fund types are measured

Each fund series counts once, with its latest Form N-PORT report dated inside the quarter; only long share positions count, restated to today's split basis. The fund type is the series' latest Form N-CEN answer on or before the quarter end (the index-fund box and the exchange-traded flag), never its name. Unclassified funds have no usable N-CEN; unit investment trusts are among them, so index ownership is a floor. Funds sit inside their advisers' 13F reports, so these shares overlap the 13F figures and are never added to them.

Holder type: Registered adviser 109 Exempt adviser 5 Adviser 4 Bank 16 Insurer 2 Broker-dealer 2 Benefit plan 3 Non-US 11 Holding company 5 Unknown 65
Showing 100 of 232
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Holder Value (USD) % of 13F Shares Open
BlackRock, Inc. $102,384,204 15.31% 7,376,384
TURTLE CREEK ASSET MANAGEMENT INC. $58,344,954 8.73% 4,203,527
Park West Asset Management LLC $43,115,985 6.45% 3,106,339
STATE STREET CORP $38,577,613 5.77% 2,779,367
VANGUARD PORTFOLIO MANAGEMENT LLC $33,102,814 4.95% 2,384,929
EdgePoint Investment Group Inc. $31,693,286 4.74% 2,283,378
VANGUARD CAPITAL MANAGEMENT LLC $28,283,498 4.23% 2,037,716
Newtyn Management, LLC $22,983,822 3.44% 1,655,895
GEODE CAPITAL MANAGEMENT, LLC $17,286,776 2.59% 1,245,445
CITADEL ADVISORS LLC $16,274,868 2.43% 1,172,541
MAGNOLIA GROUP, LLC $13,598,041 2.03% 979,686
GOLDMAN SACHS GROUP INC $13,507,154 2.02% 973,138
CHARLES SCHWAB INVESTMENT MANAGEMENT INC $11,176,786 1.67% 805,244
GILDER GAGNON HOWE & CO LLC $10,878,908 1.63% 783,783
Broad Run Investment Management, LLC $9,162,604 1.37% 660,130
MORGAN STANLEY $8,710,988 1.30% 627,593
AQR CAPITAL MANAGEMENT LLC $8,543,984 1.28% 615,561
Harspring Capital Management, LLC $8,319,921 1.24% 599,418
HRT FINANCIAL LP $7,740,515 1.16% 557,674
NORTHERN TRUST CORP $7,171,558 1.07% 516,683
UBS Group AG $7,115,136 1.06% 512,618
CenterBook Partners LP $6,987,983 1.05% 503,457
AYAL Capital Advisors Ltd $5,552,000 0.83% 400,000
FRONTIER CAPITAL MANAGEMENT CO LLC $5,310,599 0.79% 382,608
VANGUARD FIDUCIARY TRUST CO $4,776,219 0.71% 344,108
BNP PARIBAS ARBITRAGE, SA $4,554,402 0.68% 328,127
Granahan Investment Management, LLC $4,200,823 0.63% 302,653
PDT Partners, LLC $4,114,573 0.62% 296,439
SUSQUEHANNA INTERNATIONAL GROUP, LLP $3,996,052 0.60% 287,900
D. E. Shaw & Co., Inc. $3,951,552 0.59% 284,694
SUSQUEHANNA INTERNATIONAL GROUP, LLP $3,897,365 0.58% 280,790
Invesco Ltd. $3,732,647 0.56% 268,923
JPMORGAN CHASE & CO $3,712,704 0.56% 267,486
FourWorld Capital Management LLC $3,685,140 0.55% 265,500
Bank of New York Mellon Corp $3,684,997 0.55% 265,490
CITADEL ADVISORS LLC $3,607,412 0.54% 259,900
BANK OF AMERICA CORP /DE/ $3,537,469 0.53% 254,861
Jump Financial, LLC $3,494,220 0.52% 251,745
BlackBarn Capital Partners LP $3,470,000 0.52% 250,000
HERALD INVESTMENT MANAGEMENT Ltd $3,367,288 0.50% 242,600
MYDA Advisors LLC $3,331,200 0.50% 240,000
Palliser Capital (UK) Ltd $3,281,134 0.49% 236,393
PRINCIPAL FINANCIAL GROUP INC $3,242,825 0.49% 233,633
Squarepoint Ops LLC $3,137,365 0.47% 226,035
XTX Topco Ltd $3,057,625 0.46% 220,290
CITADEL ADVISORS LLC $2,720,480 0.41% 196,000
Nuveen, LLC $2,357,850 0.35% 169,874
FMR LLC $2,292,600 0.34% 165,173
Public Sector Pension Investment Board $2,277,832 0.34% 164,109
Global Endowment Management, LP $2,201,118 0.33% 158,582
CAXTON ASSOCIATES LLP $2,014,071 0.30% 145,106
UBS AM, a distinct business unit of UBS ASSET MANAGEMENT AMERICAS LLC $1,987,057 0.30% 143,160
TUDOR INVESTMENT CORP ET AL $1,933,053 0.29% 139,269
BLAIR WILLIAM & CO/IL $1,865,208 0.28% 134,381
ALGERT GLOBAL LLC $1,838,683 0.28% 132,470
SUSQUEHANNA INTERNATIONAL GROUP, LLP $1,705,852 0.26% 122,900
LPL Financial LLC $1,697,746 0.25% 122,316
MILLENNIUM MANAGEMENT LLC $1,653,635 0.25% 119,138
RHUMBLINE ADVISERS $1,650,540 0.25% 118,915
BOOTHBAY FUND MANAGEMENT, LLC $1,643,433 0.25% 118,403
Advisors Asset Management, Inc. $1,587,525 0.24% 114,375
Legal & General Group Plc $1,428,529 0.21% 102,920
Crawford Fund Management, LLC $1,375,508 0.21% 99,100
Swiss National Bank $1,360,240 0.20% 98,000
WINTON GROUP Ltd $1,235,444 0.18% 89,009
Schonfeld Strategic Advisors LLC $1,202,549 0.18% 86,639
AMERIPRISE FINANCIAL INC $1,080,196 0.16% 77,824
STATE OF WISCONSIN INVESTMENT BOARD $1,050,410 0.16% 75,678
JANE STREET GROUP, LLC $1,035,448 0.15% 74,600
PRICE T ROWE ASSOCIATES INC /MD/ $1,017,251 0.15% 73,289
WELLS FARGO & COMPANY/MN $970,197 0.15% 69,899
JANE STREET GROUP, LLC $966,311 0.14% 69,619
Y-Intercept (Hong Kong) Ltd $842,831 0.13% 108,194
BROWN ADVISORY INC $797,766 0.12% 57,476
DEUTSCHE BANK AG\ $787,383 0.12% 56,728
ACADIAN ASSET MANAGEMENT LLC $784,719 0.12% 56,536
JANE STREET GROUP, LLC $770,340 0.12% 55,500
CALIFORNIA STATE TEACHERS RETIREMENT SYSTEM $752,004 0.11% 54,179
CITIGROUP INC $743,189 0.11% 53,544
IMC-Chicago, LLC $701,425 0.10% 50,535
ALLIANCEBERNSTEIN L.P. $698,455 0.10% 50,321
PRUDENTIAL FINANCIAL INC $696,429 0.10% 50,175
RENAISSANCE TECHNOLOGIES LLC $683,326 0.10% 49,231
Caption Management, LLC $659,300 0.10% 47,500
VICTORY CAPITAL MANAGEMENT INC $643,948 0.10% 46,394
Quantinno Capital Management LP $627,653 0.09% 45,220
Walleye Capital LLC $601,004 0.09% 43,300
Engineers Gate Manager LP $582,404 0.09% 41,960
CANADA LIFE ASSURANCE Co $544,443 0.08% 39,225
New Age Alpha Advisors, LLC $523,442 0.08% 37,712
Numerai GP LLC $504,815 0.08% 36,370
ExodusPoint Capital Management, LP $485,550 0.07% 34,982
OCCUDO QUANTITATIVE STRATEGIES LP $466,909 0.07% 33,639
PNC FINANCIAL SERVICES GROUP, INC. $450,016 0.07% 32,422
GROUP ONE TRADING LLC $441,953 0.07% 31,841
Skylands Capital, LLC $437,213 0.07% 56,125
Thrivent Financial for Lutherans $435,401 0.07% 31,369
VANGUARD ASSET MANAGEMENT, Ltd $424,936 0.06% 30,615
Creative Planning $411,069 0.06% 29,616
Zurcher Kantonalbank (Zurich Cantonalbank) $399,369 0.06% 28,773

Showing the top 100 of 232 holders. Create a free account to see every holder, past quarters, search, filters and CSV export.

Key facts CIK 1158324 CUSIP 19239V302 13F (30d) 34 filings 34 filers Visit website Investor relations