Minerals Technologies (MTX) Group President vests 3,112 DRSUs, with 1,457 shares withheld for taxes

Rhea-AI Filing Summary

Minerals Technologies Inc. executive Brett Argirakis reported equity compensation activity involving company stock. On January 21, 2026, 3,112 Deferred Restricted Stock Units (DRSUs), each equal to one share of common stock, were converted into 3,112 shares of Minerals Technologies common stock at an exercise price of $0. To cover tax withholding obligations related to this vesting, the company withheld 1,457 shares of common stock at a price of $66.92 per share, rather than these shares being sold in the open market.

After these transactions, Argirakis beneficially owned 29,257 shares of common stock directly and 2,850.7 shares indirectly through a 401(k) plan, along with 27,491 DRSUs that remain outstanding. The DRSUs involved in this transaction 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

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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^*

ARGIRAKIS BRETT

(Last) (First) (Middle)

622 THIRD AVENUE

(Street)

NEW YORK NY 10017

(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)

	Director		10% Owner
X	Officer (give title below)		Other (specify below)
	Group President

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		3,112	A	$0	30,714	D
Common Stock	01/21/2026		F		1,457(1)	D	$66.92	29,257	D
Common Stock								2,850.7	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			3,112	(4)	(4)	Common Stock	3,112	$0	27,491	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 Brett Argirakis	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 transaction did MTX executive Brett Argirakis report on January 21, 2026?

On January 21, 2026, Group President Brett Argirakis reported the conversion of 3,112 Deferred Restricted Stock Units (DRSUs) into an equal number of Minerals Technologies Inc. common shares at an exercise price of $0 per share.

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

The company withheld 1,457 shares of Minerals Technologies common stock at $66.92 per share to satisfy tax withholding obligations related to the vesting of equity awards, rather than these shares being sold by the executive on the open market.

How many MTX shares does Brett Argirakis own after the reported Form 4 transactions?

Following the reported transactions, Brett Argirakis beneficially owned 29,257 shares of Minerals Technologies common stock directly and 2,850.7 shares indirectly through a 401(k) plan, as disclosed in the filing.

What Deferred Restricted Stock Units (DRSUs) does the MTX Form 4 say remain outstanding for Brett Argirakis?

After the conversion of 3,112 DRSUs into common stock, the Form 4 indicates that 27,491 DRSUs remain beneficially owned directly by Brett Argirakis. Each DRSU is described as the economic equivalent of one share of Minerals Technologies common stock.

When were the DRSUs reported in this MTX Form 4 originally granted and how do they vest?

The filing notes that the DRSUs were granted on January 21, 2025 and that they vest in three equal annual installments, with vesting beginning on January 21, 2026. The January 21, 2026 transaction reflects one of these vesting installments.

What is the role of Brett Argirakis at Minerals Technologies Inc. according to the Form 4?

The Form 4 identifies ARGIRAKIS BRETT as an officer of Minerals Technologies Inc. with the title Group President, and indicates the filing is made by one reporting person.