Cogent Communications Holdings, Inc. (CCOI) Insider Trading

Last 12 months

Insiders sold $995k and bought nothing on the open market.

None of the selling was scheduled in advance under a 10b5-1 plan. VP OF NETWORK STRATEGY Henry W Kilmer sold $95k on Dec 8, 2025, 12% of their stake, outside a plan. The last open-market buy by an executive or director was in Jun 2024.

Net open-market

−$995k

0 buys · 15 sales

Under a 10b5-1 plan

of the value sold

Insiders who bought / sold

0 / 4

executives and directors

Last open-market buy

Jun 2024

Jun 11, 2024

Get an email when CCOI's executives or directors buy, or make a large sale outside a plan.

Trades · last 2 years

Date	Insider	Trade	Shares	Price	Value	Of their stake	Filing
Sep 15	Henry W Kilmer VP OF NETWORK STRATEGY	SoldNo plan	2,400	$9.21	$22k	6.2%	Form 4
Sep 2	Thaddeus Gerard Weed VICE PRESIDENT, CFO	SoldNo plan	4,850	$9.37	$45k	2.5%	Form 4
Jun 16	Thaddeus Gerard Weed VICE PRESIDENT, CFO	SoldNo plan	4,850	$16.79	$81k	2.4%	Form 4
Jun 15	Henry W Kilmer VP OF NETWORK STRATEGY	SoldNo plan	2,400	$17.01	$41k	5.9%	Form 4
May 28	Lewis H Ferguson Director	SoldNo plan	2,800	$20.36	$57k	12%	Form 4
May 14	Sheryl Lynn Kennedy Director	SoldNo plan	3,300	$16.22	$54k	24%	Form 4
Mar 6	Henry W Kilmer VP OF NETWORK STRATEGY	SoldNo plan	2,400	$23.35	$56k	5.5%	Form 4
Mar 5	Sheryl Lynn Kennedy Director	SoldNo plan	3,300	$22.99	$76k	25%	Form 4
Mar 5	Lewis H Ferguson Director	SoldNo plan	2,206	$23.03	$51k	9.7%	Form 4
Mar 5	Thaddeus Gerard Weed VICE PRESIDENT, CFO	SoldNo plan	4,850	$22.63	$110k	2.3%	Form 4
Dec 11, 2025	Thaddeus Gerard Weed VICE PRESIDENT, CFO	SoldNo plan	7,300	$23.99	$175k	7.6%	Form 4
Dec 8, 2025	Henry W Kilmer VP OF NETWORK STRATEGY	SoldNo plan	4,800	$19.79	$95k	12%	Form 4
Dec 2, 2025	Lewis H Ferguson Director	SoldNo plan	4,000	$20.34	$81k	17%	Form 4
Dec 1, 2025	Henry W Kilmer VP OF NETWORK STRATEGY	SoldNo plan	2,400	—	—	6.6%	Form 4
Nov 11, 2025	Sheryl Lynn Kennedy Director	SoldNo plan	2,400	$21.34	$51k	19%	Form 4
Sep 5, 2025	Henry W Kilmer VP OF NETWORK STRATEGY	SoldNo plan	2,400	$36.99	$89k	6.2%	Form 4
Sep 2, 2025	Thaddeus Gerard Weed VICE PRESIDENT, CFO	SoldNo plan	4,900	$36.98	$181k	5.0%	Form 4
Aug 21, 2025	Sheryl Lynn Kennedy Director	SoldNo plan	2,000	$36.35	$73k	17%	Form 4
Aug 8, 2025	Dave Schaeffer CHAIRMAN, CEO, AND PRESIDENT	SoldNo plan	818,909	$27.50	$22.5M	54%	Form 4
Aug 7, 2025	Dave Schaeffer CHAIRMAN, CEO, AND PRESIDENT	SoldNo plan	1,840,669	$32.60	$60M	55%	Form 4
Jun 16, 2025	Dave Schaeffer CHAIRMAN, CEO, AND PRESIDENT	SoldNo plan 2 parts	70,000	$47.11 average	$3.3M	2.0%	Form 4
Jun 13, 2025	Dave Schaeffer CHAIRMAN, CEO, AND PRESIDENT	SoldNo plan 2 parts	55,000	$47.41 average	$2.61M	1.6%	Form 4
Jun 12, 2025	Dave Schaeffer CHAIRMAN, CEO, AND PRESIDENT	SoldNo plan 2 parts	55,000	$47.86 average	$2.63M	1.6%	Form 4
Jun 11, 2025	Dave Schaeffer CHAIRMAN, CEO, AND PRESIDENT	SoldNo plan 2 parts	55,000	$48.51 average	$2.67M	1.5%	Form 4
Jun 10, 2025	Dave Schaeffer CHAIRMAN, CEO, AND PRESIDENT	SoldNo plan 2 parts	55,000	$48.68 average	$2.68M	1.5%	Form 4
Jun 9, 2025	Dave Schaeffer CHAIRMAN, CEO, AND PRESIDENT	SoldNo plan 2 parts	55,000	$48.64 average	$2.68M	1.5%	Form 4
Jun 9, 2025	Thaddeus Gerard Weed VICE PRESIDENT, CFO	SoldNo plan	4,900	$48.04	$235k	4.8%	Form 4
Jun 6, 2025	Henry W Kilmer VP OF NETWORK STRATEGY	SoldNo plan	2,400	$47.95	$115k	5.9%	Form 4
Jun 6, 2025	Dave Schaeffer CHAIRMAN, CEO, AND PRESIDENT	SoldNo plan 2 parts	80,000	$47.78 average	$3.82M	2.1%	Form 4
Jun 5, 2025	Dave Schaeffer CHAIRMAN, CEO, AND PRESIDENT	SoldNo plan 2 parts	75,000	$47.30 average	$3.55M	1.9%	Form 4
Jun 4, 2025	James Bubeck CHIEF REVENUE OFFICER	SoldNo plan	2,000	$47.50	$95k	3.5%	Form 4
Jun 4, 2025	Dave Schaeffer CHAIRMAN, CEO, AND PRESIDENT	SoldNo plan 2 parts	75,000	$47.76 average	$3.58M	1.9%	Form 4
Jun 3, 2025	Dave Schaeffer CHAIRMAN, CEO, AND PRESIDENT	SoldNo plan 2 parts	65,000	$46.97 average	$3.05M	1.6%	Form 4
Jun 2, 2025	Dave Schaeffer CHAIRMAN, CEO, AND PRESIDENT	SoldNo plan 2 parts	65,000	$46.32 average	$3.01M	1.6%	Form 4
May 30, 2025	Dave Schaeffer CHAIRMAN, CEO, AND PRESIDENT	SoldNo plan	25,000	$45.90	$1.15M	0.6%	Form 4
May 29, 2025	Dave Schaeffer CHAIRMAN, CEO, AND PRESIDENT	SoldNo plan	25,000	$46.90	$1.17M	0.6%	Form 4
May 28, 2025	Dave Schaeffer CHAIRMAN, CEO, AND PRESIDENT	SoldNo plan	20,000	$47.41	$948k	0.5%	Form 4
May 28, 2025	Thaddeus Gerard Weed VICE PRESIDENT, CFO	SoldNo plan	100	$47.67	$5k	<0.1%	Form 4
May 28, 2025	Lewis H Ferguson Director	SoldNo plan	1,100	$47.57	$52k	5.5%	Form 4
May 27, 2025	Dave Schaeffer CHAIRMAN, CEO, AND PRESIDENT	SoldNo plan	20,000	$48.67	$973k	0.5%	Form 4

Sep 15No plan
Henry W Kilmer
VP OF NETWORK STRATEGY · sold 2,400 at $9.21
$22k
6.2% of stake
Sep 2No plan
Thaddeus Gerard Weed
VICE PRESIDENT, CFO · sold 4,850 at $9.37
$45k
2.5% of stake
Jun 16No plan
Thaddeus Gerard Weed
VICE PRESIDENT, CFO · sold 4,850 at $16.79
$81k
2.4% of stake
Jun 15No plan
Henry W Kilmer
VP OF NETWORK STRATEGY · sold 2,400 at $17.01
$41k
5.9% of stake
May 28No plan
Lewis H Ferguson
Director · sold 2,800 at $20.36
$57k
12% of stake
May 14No plan
Sheryl Lynn Kennedy
Director · sold 3,300 at $16.22
$54k
24% of stake
Mar 6No plan
Henry W Kilmer
VP OF NETWORK STRATEGY · sold 2,400 at $23.35
$56k
5.5% of stake
Mar 5No plan
Sheryl Lynn Kennedy
Director · sold 3,300 at $22.99
$76k
25% of stake
Mar 5No plan
Lewis H Ferguson
Director · sold 2,206 at $23.03
$51k
9.7% of stake
Mar 5No plan
Thaddeus Gerard Weed
VICE PRESIDENT, CFO · sold 4,850 at $22.63
$110k
2.3% of stake
Dec 11, 2025No plan
Thaddeus Gerard Weed
VICE PRESIDENT, CFO · sold 7,300 at $23.99
$175k
7.6% of stake
Dec 8, 2025No plan
Henry W Kilmer
VP OF NETWORK STRATEGY · sold 4,800 at $19.79
$95k
12% of stake
Dec 2, 2025No plan
Lewis H Ferguson
Director · sold 4,000 at $20.34
$81k
17% of stake
Dec 1, 2025No plan
Henry W Kilmer
VP OF NETWORK STRATEGY · sold 2,400
—
6.6% of stake
Nov 11, 2025No plan
Sheryl Lynn Kennedy
Director · sold 2,400 at $21.34
$51k
19% of stake
Sep 5, 2025No plan
Henry W Kilmer
VP OF NETWORK STRATEGY · sold 2,400 at $36.99
$89k
6.2% of stake
Sep 2, 2025No plan
Thaddeus Gerard Weed
VICE PRESIDENT, CFO · sold 4,900 at $36.98
$181k
5.0% of stake
Aug 21, 2025No plan
Sheryl Lynn Kennedy
Director · sold 2,000 at $36.35
$73k
17% of stake
Aug 8, 2025No plan
Dave Schaeffer
CHAIRMAN, CEO, AND PRESIDENT · sold 818,909 at $27.50
$22.5M
54% of stake
Aug 7, 2025No plan
Dave Schaeffer
CHAIRMAN, CEO, AND PRESIDENT · sold 1,840,669 at $32.60
$60M
55% of stake
Jun 16, 2025No plan
Dave Schaeffer
CHAIRMAN, CEO, AND PRESIDENT · sold 70,000 at avg $47.11
$3.3M
2.0% of stake
Jun 13, 2025No plan
Dave Schaeffer
CHAIRMAN, CEO, AND PRESIDENT · sold 55,000 at avg $47.41
$2.61M
1.6% of stake
Jun 12, 2025No plan
Dave Schaeffer
CHAIRMAN, CEO, AND PRESIDENT · sold 55,000 at avg $47.86
$2.63M
1.6% of stake
Jun 11, 2025No plan
Dave Schaeffer
CHAIRMAN, CEO, AND PRESIDENT · sold 55,000 at avg $48.51
$2.67M
1.5% of stake
Jun 10, 2025No plan
Dave Schaeffer
CHAIRMAN, CEO, AND PRESIDENT · sold 55,000 at avg $48.68
$2.68M
1.5% of stake
Jun 9, 2025No plan
Dave Schaeffer
CHAIRMAN, CEO, AND PRESIDENT · sold 55,000 at avg $48.64
$2.68M
1.5% of stake
Jun 9, 2025No plan
Thaddeus Gerard Weed
VICE PRESIDENT, CFO · sold 4,900 at $48.04
$235k
4.8% of stake
Jun 6, 2025No plan
Henry W Kilmer
VP OF NETWORK STRATEGY · sold 2,400 at $47.95
$115k
5.9% of stake
Jun 6, 2025No plan
Dave Schaeffer
CHAIRMAN, CEO, AND PRESIDENT · sold 80,000 at avg $47.78
$3.82M
2.1% of stake
Jun 5, 2025No plan
Dave Schaeffer
CHAIRMAN, CEO, AND PRESIDENT · sold 75,000 at avg $47.30
$3.55M
1.9% of stake
Jun 4, 2025No plan
James Bubeck
CHIEF REVENUE OFFICER · sold 2,000 at $47.50
$95k
3.5% of stake
Jun 4, 2025No plan
Dave Schaeffer
CHAIRMAN, CEO, AND PRESIDENT · sold 75,000 at avg $47.76
$3.58M
1.9% of stake
Jun 3, 2025No plan
Dave Schaeffer
CHAIRMAN, CEO, AND PRESIDENT · sold 65,000 at avg $46.97
$3.05M
1.6% of stake
Jun 2, 2025No plan
Dave Schaeffer
CHAIRMAN, CEO, AND PRESIDENT · sold 65,000 at avg $46.32
$3.01M
1.6% of stake
May 30, 2025No plan
Dave Schaeffer
CHAIRMAN, CEO, AND PRESIDENT · sold 25,000 at $45.90
$1.15M
0.6% of stake
May 29, 2025No plan
Dave Schaeffer
CHAIRMAN, CEO, AND PRESIDENT · sold 25,000 at $46.90
$1.17M
0.6% of stake
May 28, 2025No plan
Dave Schaeffer
CHAIRMAN, CEO, AND PRESIDENT · sold 20,000 at $47.41
$948k
0.5% of stake
May 28, 2025No plan
Thaddeus Gerard Weed
VICE PRESIDENT, CFO · sold 100 at $47.67
$5k
<0.1% of stake
May 28, 2025No plan
Lewis H Ferguson
Director · sold 1,100 at $47.57
$52k
5.5% of stake
May 27, 2025No plan
Dave Schaeffer
CHAIRMAN, CEO, AND PRESIDENT · sold 20,000 at $48.67
$973k
0.5% of stake

How to read this. Insiders sell for many reasons: taxes, diversifying, a house. Open-market buys are rarer and say more. A 10b5-1 plan is a trading schedule set up months in advance, so those sales were not timed on news. Large holders (funds and 10% owners) are listed under Everything but not counted as insiders. If you own or watch CCOI, we send a push when an executive buys or makes a large sale outside a plan.

Source: SEC Form 4 filings, filed within two business days of each trade and checked for new ones every hour.

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Spot a number that looks wrong? Check it in CCOI's SEC filings or

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Data sourced from SEC EDGAR filings and third-party price providers. Scores, valuations, and metrics are algorithmic estimates. This is not investment advice. See our Terms and Methodology.

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