Minerals Technologies Inc. (MTX) Insider Trading

Last 12 months

Insiders sold $4.05M and bought nothing on the open market.

None of the selling was scheduled in advance under a 10b5-1 plan. CHAIRMAN AND CEO Douglas T Dietrich sold $1.76M on May 14, 11% of their stake, outside a plan. The last open-market buy by an executive or director was in Jun 2025.

Net open-market

−$4.05M

0 buys · 4 sales

Under a 10b5-1 plan

of the value sold

Insiders who bought / sold

0 / 4

executives and directors

Last open-market buy

Jun 2025

Jun 16, 2025

Get an email when MTX'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
May 14	Douglas T Dietrich CHAIRMAN AND CEO	SoldNo plan	21,568	$81.53	$1.76M	11%	Form 4
May 11	Timothy Jordan Vice President	SoldNo plan	6,000	$80.27	$482k	59%	Form 4
Dec 29, 2025	Dj Monagle III Group President	SoldNo plan	23,093	$61.90	$1.43M	21%	Form 4
Nov 21, 2025	Brett Argirakis Group President	SoldNo plan	6,501	$58.68	$381k	18%	Form 4
Jun 16, 2025	Rocky Motwani Director	Bought	370	$54.31	$20k	45%	Form 4
May 2, 2025	Kristina M Johnson Director	Bought	1,000	$53.79	$54k	250%	Form 4
Apr 30, 2025	Erik Aldag SVP FINANCE AND TREASURY, CFO	Bought	1,000	$50.37	$50k	24%	Form 4
Apr 30, 2025	Douglas T Dietrich CHAIRMAN AND CEO	Bought	2,000	$51.56	$103k	1.2%	Form 4

May 14No plan
Douglas T Dietrich
CHAIRMAN AND CEO · sold 21,568 at $81.53
$1.76M
11% of stake
May 11No plan
Timothy Jordan
Vice President · sold 6,000 at $80.27
$482k
59% of stake
Dec 29, 2025No plan
Dj Monagle III
Group President · sold 23,093 at $61.90
$1.43M
21% of stake
Nov 21, 2025No plan
Brett Argirakis
Group President · sold 6,501 at $58.68
$381k
18% of stake
Jun 16, 2025
Rocky Motwani
Director · bought 370 at $54.31
$20k
45% of stake
May 2, 2025
Kristina M Johnson
Director · bought 1,000 at $53.79
$54k
250% of stake
Apr 30, 2025
Erik Aldag
SVP FINANCE AND TREASURY, CFO · bought 1,000 at $50.37
$50k
24% of stake
Apr 30, 2025
Douglas T Dietrich
CHAIRMAN AND CEO · bought 2,000 at $51.56
$103k
1.2% 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 MTX, 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 MTX'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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