X0306 4/A 2019-04-01 2019-04-02 0 0000891014 MINERALS TECHNOLOGIES INC MTX 0001457249 Deans Alison Ann 622 THIRD AVENUE 38TH FLOOR NEW YORK NY 10017 1 0 0 0 Phantom Stock Units 2019-04-01 4 A 0 277.544 0 A Common Stock 277.544 277.544 D Each phantom stock unit is the economic equivalent of one share of Minerals Technologies Inc. common stock. The phantom stock units were accrued under the Minerals Technologies Inc. Non-Funded Deferred Compensation and Unit Award Plan for Non-Employee Directors and are to be settled in cash upon the reporting person's termination of service as a director. Due to an administrative miscalculation, the Form 4 as originally filed on April 2, 2019, incorrectly reported the number of derivative securities acquired by the Reporting Person and the Reporting Person's holdings. The Form 4, as amended by this Form 4/A, correctly reports such information. Two subsequent Form 4s also reported incorrect holdings and incorrect dividend calculations. THOMAS J. MEEK FOR ALISON DEANS 2019-07-02