Minerals Technologies director granted 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 received a grant of 1,908.146 phantom stock units. Each unit is economically equivalent to one share of Minerals Technologies common stock. Following this award, he holds a total of 33,650.389 phantom stock units.

The units were accrued under the company’s Non-Funded Deferred Compensation and Unit Award Plan for Non-Employee Directors and are to be settled in cash when he terminates service as a director. This is a compensation-related, non-cash award rather than an open-market stock purchase or sale.

Insider Trade Summary

Grant/Award: 1,908.146 shares

Grant/Award 1 txn

Insider CLARK ROBERT L

Role Director

Type	Security	Shares	Price	Value
Grant/Award	PHANTOM STOCK UNITS	1,908.146	$0.00	$0.00

Holdings After Transaction: PHANTOM STOCK UNITS — 33,650.389 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 units granted: 1,908.146 units Total phantom units after grant: 33,650.389 units Transaction price per unit: $0.0000 +1 more

4 metrics

Phantom units granted 1,908.146 units Grant of phantom stock units on May 20, 2026

Total phantom units after grant 33,650.389 units Holdings following reported transaction

Transaction price per unit $0.0000 Compensation grant, no purchase price

Underlying security 1,908.146 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 MTX director Robert L. Clark report in this Form 4?

Robert L. Clark reported receiving 1,908.146 phantom stock units as a compensation-related grant. These units track Minerals Technologies’ common stock value and increase his total phantom stock holdings to 33,650.389 units under the company’s non-employee director compensation plan.

Are the MTX phantom stock units in this filing actual shares of common stock?

The phantom stock units are not actual shares; they are bookkeeping units economically equivalent to one share of Minerals Technologies common stock. They provide value tied to the stock price but will be settled in cash, not stock, when Clark leaves the board.

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

After this award, Clark holds 33,650.389 phantom stock units. This total reflects his accumulated compensation under the Non-Funded Deferred Compensation and Unit Award Plan for Non-Employee Directors, all tied to Minerals Technologies common stock performance.

Was this MTX Form 4 transaction an open-market buy or sell of shares?

This transaction was not an open-market buy or sell. It is coded as a grant or award acquisition of phantom stock units, representing deferred director compensation rather than a discretionary purchase or sale of Minerals Technologies common shares in the market.

When will the MTX phantom stock units reported by Robert L. Clark be settled?

The phantom stock units will be settled in cash upon Clark’s termination of service as a director. Until then, the units remain as deferred compensation that mirrors the economic value of Minerals Technologies common stock without conferring share ownership rights.

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

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Accepted by SEC EDGAR 05/21/2026 - 03:52 PM 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)
05/20/2026

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)	05/20/2026		A		1,908.146		(2)	(2)	COMMON STOCK	1,908.146	$0	33,650.389	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	05/21/2026
	** 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)