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

Role
CHAIRMAN AND CEO, Director
Signature
/s/ Timothy J Jordan for Douglas Dietrich
Issuer symbol
MTX
Transactions as of
23 Jan 2026
Net transactions value
-$842,758
Form type
4
Filing time
27 Jan 2026, 16:06:48 UTC
Previous filing
23 Jan 2026
Next filing
03 Feb 2026
SEC
View on sec.gov

Reporting Owners (1)

Name Relationship Address Signature Signature date CIK
DIETRICH DOUGLAS T CHAIRMAN AND CEO, Director 622 THIRD AVENUE, NEW YORK /s/ Timothy J Jordan for Douglas Dietrich 27 Jan 2026 0001408736

Transactions Table

Type Sym Class Transaction Value $ Shares Change % * Price $ Shares After Date Ownership Footnotes
transaction MTX Common Stock Options Exercise $0 +11,016 +6.6% $0.000000 177,094 23 Jan 2026 Direct
transaction MTX Common Stock Tax liability $418,947 -6,092 -3.4% $68.77 171,002 23 Jan 2026 Direct F1
transaction MTX Common Stock Options Exercise $0 +11,123 +6.5% $0.000000 182,125 26 Jan 2026 Direct
transaction MTX Common Stock Tax liability $423,811 -6,152 -3.4% $68.89 175,973 26 Jan 2026 Direct F1
holding MTX Common Stock 4,563 23 Jan 2026 By 401(k) F2

Derivative Securities (e.g., puts, calls, warrants, options, convertible securities)

Type Sym Class Transaction Value $ Shares Change % * Price $ Shares After Date Underlying Class Amount Exercise Price Ownership Footnotes
transaction MTX Deferred Restricted Stock Units (DRSUs) Options Exercise $0 -11,016 -12% $0.000000 81,204 23 Jan 2026 Common Stock 11,016 Direct F3, F4
transaction MTX Deferred Restricted Stock Units (DRSUs) Options Exercise $0 -11,123 -14% $0.000000 70,081 26 Jan 2026 Common Stock 11,123 Direct F3, F5
* An asterisk sign (*) next to the price indicates that the price is likely invalid.

Explanation of Responses:

Id Content
F1 These shares were withheld by Minerals Technologies Inc. to satisfy tax withholding obligations.
F2 The information contained in this report is based on a Plan Statement as of January 21, 2026.
F3 Each DRSU is the economic equivalent of one share of Minerals Technologies Inc. Common Stock.
F4 The DRSUs were granted on January 23, 2024 and vest in three equal annual installments beginning on January 23, 2025.
F5 The DRSUs were granted on January 24, 2023 and vest in three equal annual installments beginning on January 24, 2024.