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See how Context works →On the price, the facts of the public record■Insider buy□Insider sell●Results filed
With an account, also○dividends▲splits◌next earningswith an account
End-of-day prices provided by Twelve Data · One close per session; the series does not update during the trading day.
Latest on record
The most recent facts, as filed.
Up to three of the most recent, checkable facts already loaded on this page, each linked to its source.
- Sep 15, 2026Reported sale · Form 4HENRY W KILMER, VP OF NETWORK STRATEGY · $22.1KOpen the filing ↗
- Sep 2, 2026Reported sale · Form 4THADDEUS GERARD WEED, VICE PRESIDENT, CFO · $45.4KOpen the filing ↗
- Sep 2, 2026Notice of sale · Form 144THADDEUS WEED · Officer · $45.4KOpen the filing ↗
In numbers
What this profile holds, counted.
Closes · 1 year250
SEC filings on record2,39812 flagged findings
Reported transactions (Form 4)40since Dec 31, 2025 · and 4 other holdings
Corporate events (8-K)30since May 5, 2022
What the record says
Description, identity and filings, each with its source.
Every block cites its source. The colour of a finding marks its category — which document, who filed it — not how much it matters.
What the company does
Cogent Communications Holdings, Inc. is a multinational internet service provider based in the United States. Cogent's primary services consist of Internet access and data transport, offered on a fiber optic, IP data-only network, along with colocation in data centers.
Source: Wikipedia (CC BY-SA 4.0) · copied on Sep 3, 2026 · may not reflect recent changes.
The 25 most recent filings (of 2,398)
Every SEC filing, newest first, with what it is. Below, each type with its own explanation.
- Oct 5, 26SCHEDULE 13G/A ↗Passive stake · BlackRock, Inc. · 7.7% · event on Sep 30, 26 · amendment
Insider transaction · 9 Form 4 filingsshow all 9hide
- Sep 30, 26Form 4 ↗Insider transaction
- Sep 30, 26Form 4 ↗Insider transaction
- Sep 30, 26Form 4 ↗Insider transaction
- Sep 30, 26Form 4 ↗Insider transaction
- Sep 30, 26Form 4 ↗Insider transaction
- Sep 30, 26Form 4 ↗Insider transaction
- Sep 30, 26Form 4 ↗Insider transaction
- Sep 15, 26Form 4 ↗Insider transaction
- Sep 3, 26Form 4 ↗Insider transaction
- Sep 2, 26Form 144 ↗Notice of proposed sale
- Aug 7, 26SCHEDULE 13G ↗Passive stake · STATE STREET CORPORATION · 5.5% · event on Jun 30, 26
- Aug 6, 2610-Q ↗Quarterly report
- Aug 6, 268-K ↗Current report · Results
- Jul 31, 26SCHEDULE 13G/A ↗Passive stake · Vanguard Portfolio Management · 4.8% · event on Jun 30, 26 · amendment
Insider transaction · 7 Form 4 filingsshow all 7hide
- Jun 29, 268-K ↗Current report · Communication to the market
- Jun 17, 26SCHEDULE 13G/A ↗Passive stake · Park West Asset Management LLC · 5.6% · event on Jun 10, 26 · amendment
- Jun 16, 26Form 144 ↗Notice of proposed sale
2,398 filings on record, the oldest from Feb 5, 02.
Listing the 25 most recent filings of the 2,398 on record.
26645
- Jun 15, 26Entered a material agreement+1 more in the same filing8-K 1.01 ↗
- May 26, 26Entered a material agreement+2 more in the same filing8-K 1.01 ↗
3 senior executive changes2025 – 2026show all 3hide
- May 4, 26A senior executive left or was appointed+2 more in the same filing8-K 5.02 ↗
- Jan 7, 26A senior executive left or was appointed+1 more in the same filing8-K 5.02 ↗
- Aug 15, 25A senior executive left or was appointed+1 more in the same filing8-K 5.02 ↗
- Jun 17, 25Entered a material agreement+2 more in the same filing8-K 1.01 ↗
- May 8, 25A senior executive left or was appointed+3 more in the same filing8-K 5.02 ↗
- Apr 11, 25Entered a material agreement+2 more in the same filing8-K 1.01 ↗
- Mar 12, 25Entered a material agreement+1 more in the same filing8-K 1.01 ↗
- Jan 15, 25A senior executive left or was appointed+1 more in the same filing8-K 5.02 ↗
- Jun 11, 24Entered a material agreement+2 more in the same filing8-K 1.01 ↗
- May 6, 24Entered a material agreement+2 more in the same filing8-K 1.01 ↗
- Jan 5, 24A senior executive left or was appointed+1 more in the same filing8-K 5.02 ↗
- Aug 29, 23A senior executive left or was appointed8-K 5.02 ↗
10 older filings not shown · The record reaches back to Sep 17, 04.
Stress disclosures older than the timeline above. They are individual events from the record, not a complete timeline: there may be more between them.
- Mar 2, 06Listing notice (8-K 3.01)+1 more in the same filing8-K 3.01 ↗
- Jun 17, 05A debt obligation was accelerated8-K 2.04 ↗
The full record holds 2 stress filings.
Corporate events are tracked from 2004-08-23, when the SEC renumbered 8-K items. Earlier filings use an incompatible numbering and are not classified here.
Schedule 13G: short-form filing
The short form, for holders who meet specific requirements: institutional investors, passive investors without a control purpose, or exempt investors. Asset managers and index funds usually file it.
- Turtle Creek Asset Management Inc.8.2%Dec 31, 25SCHEDULE 13G/A ↗2 earlier filings
- BlackRock, Inc.7.7%Sep 30, 26SCHEDULE 13G/A ↗2 earlier filings
- Park West Asset Management LLC5.6%Jun 10, 26SCHEDULE 13G/A ↗3 co-filers on this document — the figure is the largest single stake, not their sum. · 1 earlier filing
- STATE STREET CORPORATION5.5%Jun 30, 26SCHEDULE 13G ↗
- Vanguard Portfolio Management4.8%Jun 30, 26SCHEDULE 13G/A ↗1 earlier filing
Structured 13D/G data starts 2023-12, when the SEC moved these filings to a machine-readable format. Earlier filings exist but are not parsed here.
Sale intention announced
On Sep 2, THADDEUS WEED filed notice of intent to sell up to $45K.
A notice is not a sale: it may not go ahead, may happen in part, or at a different price.
After the notice, they sold $45K on Sep 2, per their Form 4. That is 100% of the shares announced so far, and the window is still open.
- Sep 15, 26Sell$22KHENRY W KILMERVP OF NETWORK STRATEGY↗
- Sep 2, 26Sell$45KTHADDEUS GERARD WEEDVICE PRESIDENT, CFO↗
- Jun 16, 26Sell$81KTHADDEUS GERARD WEEDVICE PRESIDENT, CFO↗
- Jun 15, 26Sell$41KHENRY W KILMERVP OF NETWORK STRATEGY↗
- May 28, 26Sell$57KLewis H FERGUSON↗
- May 14, 26Sell$54KSheryl Lynn Kennedy↗
- Mar 6, 26Sell$56KHENRY W KILMERVP OF NETWORK STRATEGY↗
- Mar 5, 26Sell$110KTHADDEUS GERARD WEEDVICE PRESIDENT, CFO↗
- Mar 5, 26Sell$51KLewis H FERGUSON↗
- Mar 5, 26Sell$76KSheryl Lynn Kennedy↗
Stock compensation, tax and giftsshow the 30 other transactionshide
Stock compensation, tax withholding, option exercises and gifts. They are listed separately and are not included in the purchase and sale totals. The type describes the transaction, not the filer's intent.
- Sep 30, 26Compensationamount n/aSTEVEN D BROOKS↗
- Sep 30, 26Compensationamount n/aLewis H FERGUSON↗
- Sep 30, 26Compensationamount n/aMarc Montagner↗
- Sep 30, 26Compensationamount n/aSheryl Lynn Kennedy↗
- Sep 30, 26Compensationamount n/ade Sa Paul↗
- Sep 30, 26Compensationamount n/aDeneen C Howell↗
- Sep 30, 26Compensationamount n/aEve N Howard↗
- Jun 30, 26Compensationamount n/aLewis H FERGUSON↗
- Jun 30, 26Compensationamount n/aMarc Montagner↗
- Jun 30, 26Compensationamount n/aSheryl Lynn Kennedy↗
- Jun 30, 26Compensationamount n/aSTEVEN D BROOKS↗
- Jun 30, 26Compensationamount n/ade Sa Paul↗
- Jun 30, 26Compensationamount n/aDeneen C Howell↗
- Jun 30, 26Compensationamount n/aEve N Howard↗
- May 4, 26Compensationamount n/aDAVE SCHAEFFERCHAIRMAN, CEO, AND PRESIDENT↗
- May 4, 26Giftamount n/aDAVE SCHAEFFERCHAIRMAN, CEO, AND PRESIDENT↗
- Apr 1, 26Otheramount n/aDAVE SCHAEFFERCHAIRMAN, CEO, AND PRESIDENT↗
- Apr 1, 26Giftamount n/aDAVE SCHAEFFERCHAIRMAN, CEO, AND PRESIDENT↗
- Mar 31, 26Compensationamount n/aSTEVEN D BROOKS↗
- Mar 31, 26Compensationamount n/aLewis H FERGUSON↗
- Mar 31, 26Compensationamount n/aMarc Montagner↗
- Mar 31, 26Compensationamount n/aSheryl Lynn Kennedy↗
- Mar 31, 26Compensationamount n/ade Sa Paul↗
- Mar 31, 26Compensationamount n/aDeneen C Howell↗
- Mar 31, 26Compensationamount n/aEve N Howard↗
- Dec 31, 25Compensationamount n/aTHADDEUS GERARD WEEDVICE PRESIDENT, CFO↗
- Dec 31, 25Compensationamount n/aTHADDEUS GERARD WEEDVICE PRESIDENT, CFO↗
- Dec 31, 25Compensationamount n/aSTEVEN D BROOKS↗
- Dec 31, 25Compensationamount n/aLewis H FERGUSON↗
- Dec 31, 25Compensationamount n/aMarc Montagner↗
The full record holds 361 transactions and goes back to Jan 3, 23.
Its sector and its market
Cogent Communications Holdings, Inc. among Communication Services companies
The profile shows what is on record. Context and Radar place the company among those of its sector and region.
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Coverage
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Where each figure comes from and how far it reaches.
- Prices
- End-of-day closes provided by Twelve Data. One close per session; not real time. Closes adjusted for splits.
- Series quality
- 250 clean closes in the period.
- SEC records
- 2,398 documents on file, from Feb 5, 2002 to Oct 5, 2026.
- Company description
- Wikipedia, read on Sep 3, 2026.
- This page
- Generated on Oct 19, 2026; refreshed through the day.
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Which SEC documents appear here?
Those filed with the SEC by the company, its insiders and its major shareholders, within our coverage: periodic reports (10-K, 10-Q, 20-F), material events (8-K), proposed sale notices (Form 144), insider transactions (Form 4) and stakes above 5% (13D/13G). Each links to the original on EDGAR.
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