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Public ownership evidence

Cogent Communications Holdings, Inc. (CCOI) Ownership Disclosures

Read CCOI insider transactions, institutional 13F filings and Congressional disclosures with report dates, public availability and original receipts.

As of 2026-11-07T14:03:26.246Z

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2026-09-302026-09-30Montagner MarcA3,445Not reported

First displayed source row from Recent Form 4 activity. The full bounded history and coverage notes remain below.

The displayed observation date is 2026-09-30 and its public availability date is 2026-09-30. Subtracting those calendar dates gives 0 days of disclosure lag. Historical public research can use the record from the availability date, rather than backdating knowledge to the observation date. The calendar-day difference does not assert an intraday publication time.

This row is code A: a award. An award is an acquisition but is not an open-market purchase. A purchase-following rule must not count it as code P.

Open the linked original receipts to verify the row, then inspect a second record before drawing a pattern. This public filing observation supplies source evidence, not a completed copy-trading return.

Recent Form 4 activity

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2026-09-302026-09-30Montagner MarcA3,445Not reported
2026-09-302026-09-30Kennedy Sheryl LynnA3,445Not reported
2026-09-302026-09-30Howell Deneen CA3,445Not reported
2026-09-302026-09-30Howard Eve NA3,445Not reported
2026-09-302026-09-30FERGUSON Lewis HA3,445Not reported
2026-09-302026-09-30de Sa PaulA3,445Not reported
2026-09-302026-09-30BROOKS STEVEN DA3,445Not reported
2026-09-152026-09-15KILMER HENRY WS2,400Not reported
2026-09-042026-09-02WEED THADDEUS GERARDS4,850Not reported

90-day public availability window, up to 50 records.

Recent institutional filing receipts

Inspect all 50 displayed rows: Recent institutional filing receipts

These are raw ticker-matched positions in recent 13F receipts, including amendments. They are not deduplicated current ownership totals. Open the manager profile to inspect its effective filing book.

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Advisors Asset Management, Inc.2021-12-312026-08-28208,224$15,237,832None
Advisors Asset Management, Inc.2022-12-312026-08-28256,747$14,655,119None
Advisors Asset Management, Inc.2020-06-302026-08-2879,896$6,180,755None
Advisors Asset Management, Inc.2022-06-302026-08-28231,470$14,064,000None
Advisors Asset Management, Inc.2021-09-302026-08-28178,185$12,623,000None
Advisors Asset Management, Inc.2024-03-312026-08-27182,813$11,943,173None
Advisors Asset Management, Inc.2025-03-312026-08-27184,195$11,292,995None
Advisors Asset Management, Inc.2022-09-302026-08-27249,177$12,997,000None
Advisors Asset Management, Inc.2020-12-312026-08-2786,332$5,169,000None
Advisors Asset Management, Inc.2022-03-312026-08-27217,841$14,453,750None
Advisors Asset Management, Inc.2023-06-302026-08-27236,226$15,895,648None
Advisors Asset Management, Inc.2023-09-302026-08-27211,905$13,116,920None
Advisors Asset Management, Inc.2023-03-312026-08-27256,585$16,349,596None
Advisors Asset Management, Inc.2021-03-312026-08-27116,518$8,011,778None
Advisors Asset Management, Inc.2021-06-302026-08-27143,312$11,019,000None
Advisors Asset Management, Inc.2020-09-302026-08-2764,892$3,896,765None
Advisors Asset Management, Inc.2025-09-302026-08-27194,425$7,456,199None
Advisors Asset Management, Inc.2023-12-312026-08-27189,470$14,411,088None
Advisors Asset Management, Inc.2019-12-312026-08-26225,775$14,858,253None
Advisors Asset Management, Inc.2025-06-302026-08-25187,919$9,059,575None
CALIFORNIA STATE TEACHERS RETIREMENT SYSTEM2026-06-302026-08-2554,179$752,005None
CALIFORNIA STATE TEACHERS RETIREMENT SYSTEM2026-06-302026-08-25752,005$54,179,000None
Advisors Asset Management, Inc.2024-09-302026-08-22191,331$14,525,850None
Advisors Asset Management, Inc.2024-06-302026-08-22188,116$10,617,267None
Advisors Asset Management, Inc.2024-12-312026-08-22191,427$14,753,279None
Advisors Asset Management, Inc.2025-12-312026-08-22181,650$3,916,374None
Advisors Asset Management, Inc.2020-03-312026-08-22151,252$12,398,126None
MERCER GLOBAL ADVISORS INC /ADV2026-06-302026-08-2016,595$230,338None
Advisors Asset Management, Inc.2019-03-312026-08-19442,732$24,018,211None
Advisors Asset Management, Inc.2019-09-302026-08-19297,775$16,407,403None
Advisors Asset Management, Inc.2019-06-302026-08-19392,221$23,282,239None
Ensign Peak Advisors, Inc2026-03-312026-08-194,109$77,414None
Ensign Peak Advisors, Inc2025-12-312026-08-194,109$88,590None
Ensign Peak Advisors, Inc2025-09-302026-08-1910,509$403,020None
Fulcrum Asset Management LLP2026-06-302026-08-194,642$60,996None
PIN OAK INVESTMENT ADVISORS INC2026-06-302026-08-19590$8,000None
Caitlin John, LLC2026-06-302026-08-181,954$27,122None
Transamerica Financial Advisors, LLC2026-06-302026-08-189$124None
PUBLIC EMPLOYEES RETIREMENT SYSTEM OF OHIO2026-06-302026-08-181,881$26,108None
AMERIFLEX GROUP, INC.2026-06-302026-08-1520$278None
CAXTON ASSOCIATES LLP2026-06-302026-08-15145,106$2,014,071None
Federation des caisses Desjardins du Quebec2026-06-302026-08-151,570$21,792None
BlackBarn Capital Partners LP2026-06-302026-08-15250,000$3,470,000None
Advisors Asset Management, Inc.2026-06-302026-08-15114,375$1,587,525None
Quarry LP2026-06-302026-08-1538$527None
Rangeley Capital, LLC2026-06-302026-08-1514,000$194,320None
Palliser Capital (UK) Ltd2026-06-302026-08-15236,393$3,281,135None
Militia Capital Partners, LP2025-09-302026-08-1570,000$2,684,500Put
Militia Capital Partners, LP2025-06-302026-08-1570,000$3,374,700Put
Militia Capital Partners, LP2025-03-312026-08-1590,000$5,517,900Put

90-day public filing window, up to 50 source positions.

Recent Congressional disclosures

No matching Congressional transactions were returned in this source preview.

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Bounded public source preview, up to 25 disclosed events.

How to read the disclosure dates

The tables report different things: insider transactions, institutional positions and Congressional transaction ranges. Read each table with its source dates and units. They cannot be added into a combined ownership percentage.

  1. Company insiders

    SEC Form 4 purchases, sales and awards report transactions and their public filing availability.

  2. Institutional managers

    13F reports disclose delayed quarter-end positions. They are not a record of trades between quarters.

  3. Congressional filers

    Periodic transaction reports disclose transaction dates and amount brackets. Public filing dates determine what researchers could know.

Read the transaction codes

Awards use transaction code A, purchases P and sales S. An acquisition from an award is not the same as an open-market purchase. Joint filers may share a transaction. Use original receipts and availability dates to interpret the events.