Douglas T. Dietrich - 23 Jan 2026 Form 4 Insider Report for MINERALS TECHNOLOGIES INC (MTX)

Reporting relationship: CHAIRMAN AND CEO, Director
Issuer ticker: MTX
Reported as of: 23 Jan 2026
Net transaction value: -$842,758
SEC form: 4
Accepted by SEC: 27 Jan 2026, 16:06:48 UTC
Prior SEC filing: 23 Jan 2026
Next SEC filing: 03 Feb 2026
Source filing: View source filing
Reporting owner signature: /s/ Timothy J Jordan for Douglas Dietrich

Key filing fact

Douglas T. Dietrich filed Form 4 for MINERALS TECHNOLOGIES INC (MTX) on 27 Jan 2026.

Key facts

This page summarizes Douglas T. Dietrich's Form 4 filing for MINERALS TECHNOLOGIES INC (MTX).
6 reported transactions and 2 derivative rows are listed below.
Accepted by SEC: 27 Jan 2026, 16:06.

Change

Previous filing in this sequence was filed on 23 Jan 2026.
Current net transaction value: -$842,758.

Research use

This tells you what this filing adds before you inspect full transaction and derivative tables.
You can trace every row back to the original SEC filing document.

Evidence

Filed on Form 4

Ownership activity is grounded in SEC Form 4 disclosures.

View source filing

Reporting Owners (1)

CIK 0001408736 Primary reporting owner

DIETRICH DOUGLAS T

Relationship: CHAIRMAN AND CEO, Director
Address: 622 THIRD AVENUE, NEW YORK
Signature: /s/ Timothy J Jordan for Douglas Dietrich
Signature date: 27 Jan 2026

Reported non-derivative transactions

Shares, units, or other non-derivative securities reported in this filing.

MTX transaction

Common Stock

Options Exercise

Transaction value: $0
Shares: +11,016
Change %: +6.6%
Price: $0.000000
Shares after: 177,094
Date: 23 Jan 2026
Ownership: Direct

MTX transaction

Common Stock

Tax liability

Transaction value: $418,947
Shares: -6,092
Change %: -3.4%
Price: $68.77
Shares after: 171,002
Date: 23 Jan 2026
Ownership: Direct
Footnotes: F1

MTX transaction

Common Stock

Options Exercise

Transaction value: $0
Shares: +11,123
Change %: +6.5%
Price: $0.000000
Shares after: 182,125
Date: 26 Jan 2026
Ownership: Direct

MTX transaction

Common Stock

Tax liability

Transaction value: $423,811
Shares: -6,152
Change %: -3.4%
Price: $68.89
Shares after: 175,973
Date: 26 Jan 2026
Ownership: Direct
Footnotes: F1

MTX holding

Common Stock

No transaction description listed

Transaction value
Shares
Change %
Price
Shares after: 4,563
Date: 23 Jan 2026
Ownership: By 401(k)
Footnotes: F2

Reported derivative securities

Options, warrants, convertible securities, or similar derivative positions disclosed in the filing.

MTX transaction Derivative

Deferred Restricted Stock Units (DRSUs)

Options Exercise

Transaction value: $0
Shares: -11,016
Change %: -12%
Price: $0.000000
Shares after: 81,204
Date: 23 Jan 2026
Ownership: Direct
Underlying class: Common Stock
Underlying amount: 11,016
Exercise price
Footnotes: F3, F4

MTX transaction Derivative

Deferred Restricted Stock Units (DRSUs)

Options Exercise

Transaction value: $0
Shares: -11,123
Change %: -14%
Price: $0.000000
Shares after: 70,081
Date: 26 Jan 2026
Ownership: Direct
Underlying class: Common Stock
Underlying amount: 11,123
Exercise price
Footnotes: F3, F5

^* marks a reported price that did not pass the local price check.

Additional SEC filing notes

Filing notes and footnotes

Explanation of responses 5 footnotes

Footnote F1

These shares were withheld by Minerals Technologies Inc. to satisfy tax withholding obligations.

Footnote F2

The information contained in this report is based on a Plan Statement as of January 21, 2026.

Footnote F3

Each DRSU is the economic equivalent of one share of Minerals Technologies Inc. Common Stock.

Footnote F4

The DRSUs were granted on January 23, 2024 and vest in three equal annual installments beginning on January 23, 2025.

Footnote F5

The DRSUs were granted on January 24, 2023 and vest in three equal annual installments beginning on January 24, 2024.