MTX (MTX) CFO Aldag exercises 2,245 DRSUs and withholds 1,356 shares for taxes

Rhea-AI Filing Summary

Minerals Technologies Inc. SVP Finance and Treasury, CFO Erik Aldag reported equity award activity involving Deferred Restricted Stock Units (DRSUs) and common stock on January 21, 2026. He converted 2,245 DRSUs, each economically equivalent to one share of common stock, into the same number of common shares at an exercise price of $0.

To cover tax withholding obligations, 1,356 common shares were withheld by Minerals Technologies Inc. at a price of $66.92 per share. Following these transactions, Aldag directly held 5,134 shares of common stock, plus 897.255 shares indirectly through a 401(k) plan, and 19,371 DRSUs remained beneficially owned.

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^*

ALDAG ERIK

(Last) (First) (Middle)

622 3RD 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)
	SVP FINANCE AND TREASURY, CFO

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		2,245	A	$0	6,490	D
Common Stock	01/21/2026		F		1,356(1)	D	$66.92	5,134	D
Common Stock								897.255	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			2,245	(4)	(4)	Common Stock	2,245	$0	19,371	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 Erik Aldag	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 CFO Erik Aldag report on January 21, 2026?

On January 21, 2026, MTX SVP Finance and Treasury, CFO Erik Aldag reported the conversion of 2,245 Deferred Restricted Stock Units (DRSUs) into the same number of 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 filing states that 1,356 common shares of Minerals Technologies Inc. were withheld by the company to satisfy tax withholding obligations at a price of $66.92 per share.

What are DRSUs in the context of the MTX CFO’s Form 4?

The filing explains that each Deferred Restricted Stock Unit (DRSU) is the economic equivalent of one share of Minerals Technologies Inc. common stock, and the reported transaction involved converting 2,245 DRSUs into common shares.

How many Minerals Technologies (MTX) shares does the CFO hold after the reported transactions?

After the transactions, CFO Erik Aldag beneficially owned 5,134 shares of common stock directly, plus 897.255 shares indirectly through a 401(k) plan, and 19,371 DRSUs remained beneficially owned.

What does transaction code "M" mean in this MTX Form 4?

In this Form 4, transaction code "M" is used for the exercise or conversion of derivative securities. Here, it reflects the conversion of 2,245 DRSUs into common stock on January 21, 2026 at an exercise price of $0.

Did the MTX CFO sell shares on the open market in this Form 4?

The filing indicates that 1,356 common shares were withheld by Minerals Technologies Inc. to satisfy tax withholding obligations, rather than being reported as an open-market sale. The remaining shares from the DRSU conversion increased his direct common stock holdings.

When were the DRSUs in the MTX filing originally granted 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 to the Form 4.