MTX director granted 51 phantom stock units

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

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 51.329 phantom stock units tied to the company’s common stock. These units were awarded under the Non-Funded Deferred Compensation and Unit Award Plan for Non-Employee Directors and are to be settled in cash when his board service ends. Following this grant, Clark holds a total of 33,701.718 phantom stock units, representing compensation rather than an open-market share purchase or sale.

Insider Trade Summary

Grant/Award: 51.329 shares

Grant/Award 1 txn

Insider CLARK ROBERT L

Role Director

Type	Security	Shares	Price	Value
Grant/Award	PHANTOM STOCK UNITS	51.329	$0.00	$0.00

Holdings After Transaction: PHANTOM STOCK UNITS — 33,701.718 contracts (Direct)

Footnotes (2)

1. F1. Each phantom stock unit is the economic equivalent of one share of Minerals Technologies Inc. Common Stock.
2. F2. 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.

Key Figures

Phantom stock units granted: 51.329 units Total phantom units after grant: 33,701.718 units Transaction price per unit: $0.0000 +1 more

4 metrics

Phantom stock units granted 51.329 units Grant to Robert L. Clark on 2026-06-18

Total phantom units after grant 33,701.718 units Holdings following reported transaction

Transaction price per unit $0.0000 Compensation grant, not open-market trade

Underlying security 51.329 common shares equivalent Each phantom unit equals one MTX common share economically

Key Terms

PHANTOM STOCK UNITS, Non-Funded Deferred Compensation and Unit Award Plan for Non-Employee Directors, economic equivalent, settled in cash

4 terms

PHANTOM STOCK UNITS financial

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

Phantom stock units are company promises that pay a cash or stock-equivalent award tied to the firm’s share price or value growth, but they do not issue actual shares. Think of them as a bonus check that moves with the stock like a mirror rather than handing over an ownership slice. Investors care because these awards can affect a company’s future cash obligations, executive incentives and reported expenses without causing share dilution.

Non-Funded Deferred Compensation and Unit Award Plan for Non-Employee Directors financial

"The phantom stock units were accrued under the Minerals Technologies Inc. Non-Funded Deferred Compensation and Unit Award Plan for Non-Employee Directors"

economic equivalent financial

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

settled in cash financial

"are to be settled in cash upon the reporting person's termination of service as a director."

FAQ

AI-generated questions and answers. How Rhea-AI works. Not financial advice.

What did Minerals Technologies (MTX) director Robert L. Clark report on this Form 4?

Robert L. Clark reported receiving 51.329 phantom stock units as a compensation grant. These units track the value of Minerals Technologies common stock and increase his total phantom stock holdings to 33,701.718 units under the company’s non-employee director compensation plan.

Are the Minerals Technologies (MTX) phantom stock units an open-market share purchase or sale?

No, the phantom stock units are a compensation grant, not an open-market transaction. They were awarded under the Non-Funded Deferred Compensation and Unit Award Plan for Non-Employee Directors and will be settled in cash, based on the value of common stock, at service termination.

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

After receiving 51.329 additional phantom stock units, Robert L. Clark now holds 33,701.718 phantom stock units. Each unit is economically equivalent to one share of Minerals Technologies common stock but will be paid out in cash when his board service ends.

What is a phantom stock unit in the context of Minerals Technologies (MTX)?

A phantom stock unit is a cash-settled award whose value mirrors one share of Minerals Technologies common stock. Directors accrue these units under a deferred compensation plan, and they are paid out in cash, not shares, when the director leaves the board.

Under which plan were the MTX phantom stock units for Robert L. Clark accrued?

The phantom stock units were accrued under the Minerals Technologies Inc. Non-Funded Deferred Compensation and Unit Award Plan for Non-Employee Directors. This plan grants phantom units as part of director compensation, to be settled in cash upon termination of board service.

AI-generated analysis. How Rhea-AI works. Not financial advice.

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Accepted by SEC EDGAR 06/22/2026 - 03:04 PM EDT Learn about SEC filing dates

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 NEW YORK 10017-6707

(City) (State) (Zip)

UNITED STATES

(Country)

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)

2a. Foreign Trading Symbol

3. Date of Earliest Transaction (Month/Day/Year)
06/18/2026

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

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

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

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)	06/18/2026		A		51.329		(2)	(2)	COMMON STOCK	51.329	$0	33,701.718	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	06/22/2026
	** 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.
* Form 4: SEC 1474 (03-26)