Minerals Technologies (MTX) CEO exercises 10,033 units, withholds shares for tax

Rhea-AI Filing Summary

Minerals Technologies Inc. chairman and CEO Douglas Dietrich reported equity compensation activity involving Deferred Restricted Stock Units and common stock. On January 21, 2026, he exercised 10,033 Deferred Restricted Stock Units (DRSUs), each economically equivalent to one share of common stock, receiving an equal number of shares at an exercise price of $0. To cover tax withholding obligations, 5,630 shares of common stock were withheld by the company at a price of $66.92 per share.

After these transactions, Dietrich directly owned 166,078 shares of Minerals Technologies common stock and held an additional 4,562.677 shares indirectly through a 401(k) plan. He also held 92,220 DRSUs directly following the reported activity, which were part of an award granted on January 21, 2025 that vests in three equal annual installments beginning January 21, 2026.

SEC Form 4

FORM 4

UNITED STATES SECURITIES AND EXCHANGE COMMISSION
Washington, D.C. 20549

STATEMENT OF CHANGES IN BENEFICIAL OWNERSHIP

Filed pursuant to Section 16(a) of the Securities Exchange Act of 1934
or Section 30(h) of the Investment Company Act of 1940

OMB APPROVAL

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Check this box if no longer subject to Section 16. Form 4 or Form 5 obligations may continue. See Instruction 1(b).

Check this box to indicate that a transaction was made pursuant to a contract, instruction or written plan for the purchase or sale of equity securities of the issuer that is intended to satisfy the affirmative defense conditions of Rule 10b5-1(c). See Instruction 10.

1. Name and Address of Reporting Person^*

DIETRICH DOUGLAS T

(Last) (First) (Middle)

622 THIRD AVENUE

(Street)

NEW YORK NY 10017-6707

(City) (State) (Zip)

2. Issuer Name and Ticker or Trading Symbol
MINERALS TECHNOLOGIES INC [ MTX ]

5. Relationship of Reporting Person(s) to Issuer
(Check all applicable)

X	Director		10% Owner
X	Officer (give title below)		Other (specify below)
	CHAIRMAN AND CEO

3. Date of Earliest Transaction (Month/Day/Year)
01/21/2026

4. If Amendment, Date of Original Filed (Month/Day/Year)

6. Individual or Joint/Group Filing (Check Applicable Line)

X	Form filed by One Reporting Person
	Form filed by More than One Reporting Person

Table I - Non-Derivative Securities Acquired, Disposed of, or Beneficially Owned
1. Title of Security (Instr. 3)	2. Transaction Date (Month/Day/Year)	2A. Deemed Execution Date, if any (Month/Day/Year)	3. Transaction Code (Instr. 8)		4. Securities Acquired (A) or Disposed Of (D) (Instr. 3, 4 and 5)			5. Amount of Securities Beneficially Owned Following Reported Transaction(s) (Instr. 3 and 4)	6. Ownership Form: Direct (D) or Indirect (I) (Instr. 4)	7. Nature of Indirect Beneficial Ownership (Instr. 4)
			Code	V	Amount	(A) or (D)	Price
Common Stock	01/21/2026		M		10,033	A	$0	171,708	D
Common Stock	01/21/2026		F		5,630(1)	D	$66.92	166,078	D
Common Stock								4,562.677	I	By 401(k)(2)

Table II - Derivative Securities Acquired, Disposed of, or Beneficially Owned (e.g., puts, calls, warrants, options, convertible securities)
1. Title of Derivative Security (Instr. 3)	2. Conversion or Exercise Price of Derivative Security	3. Transaction Date (Month/Day/Year)	3A. Deemed Execution Date, if any (Month/Day/Year)	4. Transaction Code (Instr. 8)		5. Number of Derivative Securities Acquired (A) or Disposed of (D) (Instr. 3, 4 and 5)		6. Date Exercisable and Expiration Date (Month/Day/Year)		7. Title and Amount of Securities Underlying Derivative Security (Instr. 3 and 4)		8. Price of Derivative Security (Instr. 5)	9. Number of derivative Securities Beneficially Owned Following Reported Transaction(s) (Instr. 4)	10. Ownership Form: Direct (D) or Indirect (I) (Instr. 4)	11. Nature of Indirect Beneficial Ownership (Instr. 4)
				Code	V	(A)	(D)	Date Exercisable	Expiration Date	Title	Amount or Number of Shares
Deferred Restricted Stock Units (DRSUs)	(3)	01/21/2026		M			10,033	(4)	(4)	Common Stock	10,033	$0	92,220	D

Explanation of Responses:

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

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

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

4. The DRSUs were granted on January 21, 2025, and vest in three equal annual installments beginning on January 21, 2026.

	/s/ Timothy J Jordan for Douglas Dietrich	01/23/2026
	** Signature of Reporting Person	Date
Reminder: Report on a separate line for each class of securities beneficially owned directly or indirectly.
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FAQ

What insider activity did MTX chairman and CEO Douglas Dietrich report?

Douglas Dietrich reported exercising 10,033 Deferred Restricted Stock Units (DRSUs) into an equal number of Minerals Technologies Inc. common shares on January 21, 2026, at an exercise price of $0 per unit.

How many Minerals Technologies (MTX) shares were withheld for taxes in this Form 4?

The filing shows that 5,630 shares of Minerals Technologies common stock were withheld by the company at $66.92 per share to satisfy tax withholding obligations related to the DRSU vesting.

How many Minerals Technologies (MTX) shares does Douglas Dietrich own after the reported transactions?

Following the reported transactions, Douglas Dietrich directly owned 166,078 shares of Minerals Technologies common stock and indirectly held 4,562.677 shares through a 401(k) plan.

What are Deferred Restricted Stock Units (DRSUs) in the MTX Form 4 filing?

The filing states that each Deferred Restricted Stock Unit (DRSU) is the economic equivalent of one share of Minerals Technologies Inc. common stock, meaning the value tracks the company’s share price.

How many DRSUs does the MTX CEO hold after this transaction?

After exercising 10,033 DRSUs, Douglas Dietrich held 92,220 DRSUs directly, according to the reported balance of derivative securities following the transaction.

When were the DRSUs granted to the Minerals Technologies (MTX) CEO and how do they vest?

The DRSUs were granted on January 21, 2025 and vest in three equal annual installments beginning on January 21, 2026, as described in the footnotes.