Cabot Corporation (CBT) Insider Trading

Last 12 months

Insiders sold $19.6M and bought nothing on the open market.

None of the selling was scheduled in advance under a 10b5-1 plan. President and CEO Sean D Keohane sold $11.5M on Aug 28, 24% of their stake, outside a plan. The last open-market buy by an executive or director was in Jun 2018.

Net open-market

−$19.6M

0 buys · 3 sales

Under a 10b5-1 plan

of the value sold

Insiders who bought / sold

0 / 1

executives and directors

Last open-market buy

Jun 2018

Jun 1, 2018

Get an email when CBT'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
Aug 28	Sean D Keohane President and CEO	SoldNo plan	134,895	$85.00	$11.5M	24%	Form 4
Aug 24	Sean D Keohane President and CEO	SoldNo plan	2,779	$85.50	$238k	0.9%	Form 4
Aug 7	Sean D Keohane President and CEO	SoldNo plan	91,923	$86.41	$7.94M	18%	Form 4
Aug 14, 2025	Sean D Keohane President and CEO	SoldNo plan 4 parts	114,436	$79.28 average	$9.07M	23%	Form 4
Nov 13, 2024	Jeff Ji Zhu Executive Vice President	SoldNo plan	14,566	$113.25	$1.65M	17%	Form 4
Nov 13, 2024	Lisa M Dumont VP, Controller & CAO	SoldNo plan	865	$111.74	$97k	7.6%	Form 4
Nov 11, 2024	Hobart Kalkstein Executive Vice President	SoldNo plan 3 parts	34,759	$115.23 average	$4.01M	39%	Form 4

Aug 28No plan
Sean D Keohane
President and CEO · sold 134,895 at $85.00
$11.5M
24% of stake
Aug 24No plan
Sean D Keohane
President and CEO · sold 2,779 at $85.50
$238k
0.9% of stake
Aug 7No plan
Sean D Keohane
President and CEO · sold 91,923 at $86.41
$7.94M
18% of stake
Aug 14, 2025No plan
Sean D Keohane
President and CEO · sold 114,436 at avg $79.28
$9.07M
23% of stake
Nov 13, 2024No plan
Jeff Ji Zhu
Executive Vice President · sold 14,566 at $113.25
$1.65M
17% of stake
Nov 13, 2024No plan
Lisa M Dumont
VP, Controller & CAO · sold 865 at $111.74
$97k
7.6% of stake
Nov 11, 2024No plan
Hobart Kalkstein
Executive Vice President · sold 34,759 at avg $115.23
$4.01M
39% 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 CBT, 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 CBT's SEC filings or

Download this analysis as a PDF (Pro)

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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