Minerals Technologies (NYSE: MTX) director granted new phantom stock units

Rhea-AI Filing Summary

CLARK ROBERT L reported acquisition or exercise transactions in this Form 4 filing.

MINERALS TECHNOLOGIES INC director Robert L. Clark reported receiving a grant of 56.439 phantom stock units on March 6, 2026. Each phantom stock unit is the economic equivalent of one share of common stock and is accrued under the company’s Non-Funded Deferred Compensation and Unit Award Plan for Non-Employee Directors.

These phantom stock units will be settled in cash when Clark’s service as a director ends. Following this award, he holds a total of 31,742.243 phantom stock units directly, reflecting ongoing board compensation rather than an open-market share purchase or sale.

Insider Trade Summary

1 transaction reported

Mixed 1 txn

Insider CLARK ROBERT L

Role Director

Type	Security	Shares	Price	Value
Grant/Award	PHANTOM STOCK UNITS	56.439	$0.00	--

Holdings After Transaction: PHANTOM STOCK UNITS — 31,742.243 shares (Direct)

Footnotes (1)

1. 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.

Form 4 Insider Transactions: What Each Field Means →

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

OMB Number:			3235-0287
Estimated average burden
hours per response:			0.5

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^*

CLARK ROBERT L

(Last) (First) (Middle)

622 THIRD AVE.,

38TH FLOOR

(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
	Officer (give title below)		Other (specify below)

3. Date of Earliest Transaction (Month/Day/Year)
03/06/2026

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

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
PHANTOM STOCK UNITS	(1)	03/06/2026		A		56.439		(2)	(2)	COMMON STOCK	56.439	$0	31,742.243	D

Explanation of Responses:

1. Each phantom stock unit is the economic equivalent of one share of Minerals Technologies Inc. Common Stock.

2. 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.

	TIMOTHY JORDAN FOR ROBERT CLARK	03/10/2026
	** Signature of Reporting Person	Date
Reminder: Report on a separate line for each class of securities beneficially owned directly or indirectly.
* If the form is filed by more than one reporting person, see Instruction 4 (b)(v).
** Intentional misstatements or omissions of facts constitute Federal Criminal Violations See 18 U.S.C. 1001 and 15 U.S.C. 78ff(a).
Note: File three copies of this Form, one of which must be manually signed. If space is insufficient, see Instruction 6 for procedure.
Persons who respond to the collection of information contained in this form are not required to respond unless the form displays a currently valid OMB Number.

FAQ

What insider transaction did MTX director Robert L. Clark report?

Robert L. Clark reported an award of 56.439 phantom stock units on March 6, 2026. The grant was made under Minerals Technologies’ Non-Funded Deferred Compensation and Unit Award Plan for Non-Employee Directors and increased his total phantom stock units to 31,742.243.

What are phantom stock units in the MTX Form 4 filing?

The filing states each phantom stock unit is the economic equivalent of one share of Minerals Technologies common stock. These units track share value for compensation purposes but are not actual shares, and they are ultimately settled in cash rather than stock for the reporting person.

When will Robert L. Clark’s MTX phantom stock units be paid out?

According to the disclosure, the phantom stock units are to be settled in cash upon Robert L. Clark’s termination of service as a director. This means payment occurs when he ceases serving on the Minerals Technologies board, consistent with the plan’s deferred compensation design.

Does the MTX Form 4 show a market purchase or sale by Robert L. Clark?

The Form 4 reports a grant of phantom stock units, not an open-market purchase or sale of common stock. The transaction is coded as an acquisition related to compensation and is settled in cash in the future, rather than reflecting immediate trading activity in MTX shares.

How many MTX phantom stock units does Robert L. Clark hold after this grant?

Following the reported award, Robert L. Clark holds 31,742.243 phantom stock units directly. Each unit is economically equivalent to one share of Minerals Technologies common stock and is part of his non-employee director compensation, to be paid out in cash at service termination.