X0609 4 2026-05-14 0000891014 MINERALS TECHNOLOGIES INC MTX 0001408736 DIETRICH DOUGLAS T false 622 THIRD AVENUE NEW YORK NY 10017-6707 1 1 CHAIRMAN AND CEO 0 Common Stock 2026-05-14 4 M 0 21568 78.025 A 197541 D Common Stock 2026-05-14 4 S 0 21568 81.5292 D 175973 D Common Stock 4735.457 I By 401(k) Employee Stock Options (Right to Buy) 78.025 2026-05-14 4 M 0 21568 0 D 2027-01-17 Common Stock 21568 0 D Weighted average price representing high of $81.960 and low of $81.140. The information contained in this report is based on a Plan Statement as of May 14, 2026. The options were granted on January 17, 2017 and vested in three equal annual installments beginning on January 17, 2018. /s/ Timothy J Jordan for Douglas Dietrich 2026-05-18