Minerals Technologies director gets 56.357 phantom units

Director Robert L. Clark received additional cash-settled phantom stock units tied to MTX common stock as deferred board compensation.

Rhea-AI Filing Summary

MINERALS TECHNOLOGIES INC (symbol: MTX) is the issuer of record for a Form 4 filing submitted to the SEC. CLARK ROBERT L reported acquisition or exercise transactions in this Form 4 filing.

Minerals Technologies Inc. (MTX) reported that director Robert L. Clark received a grant of 56.357 phantom stock units on September 4, 2026 under the company’s Non-Funded Deferred Compensation and Unit Award Plan for Non-Employee Directors. Following this award, he holds 33,758.075 phantom stock units, each economically equivalent to one share of common stock and payable in cash upon termination of his service as a director. No Rule 10b5-1 trading plan is reported for this award.

Insider Trade Summary

Grant/Award: 56.357 shares

Grant/Award 1 txn

Insider CLARK ROBERT L

Role Director

Type	Security	Shares	Price	Value
Grant/Award	PHANTOM STOCK UNITS F1, F2	56.357	$0.00	$0.00

Holdings After Transaction: PHANTOM STOCK UNITS — 33,758.075 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: 56.357 units Phantom stock units held after transaction: 33,758.075 units Transaction price per phantom stock unit: $0.00 per unit +1 more

4 metrics

Phantom stock units granted 56.357 units Grant to director Robert L. Clark on September 4, 2026

Phantom stock units held after transaction 33,758.075 units Director Robert L. Clark’s total phantom stock units after the award

Transaction price per phantom stock unit $0.00 per unit Reported grant price for the September 4, 2026 award

Economic equivalence ratio 1 unit : 1 share Each phantom stock unit equals one share of MTX common stock 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"

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

"were accrued under the Minerals Technologies Inc. Non-Funded Deferred Compensation"

economic equivalent financial

"Each phantom stock unit is the economic equivalent of one share"

settled in cash financial

"are to be settled in cash upon the reporting person's termination"

FAQ

What transaction did MTX director Robert L. Clark report on this Form 4?

He reported a grant of 56.357 phantom stock units on September 4, 2026. The filing describes this as a grant or award acquisition of derivative securities linked to Minerals Technologies Inc. common stock as part of non-employee director compensation.

How many MTX-related phantom stock units does Robert L. Clark hold after this transaction?

After the grant, Robert L. Clark holds 33,758.075 phantom stock units. Each unit is described as the economic equivalent of one share of Minerals Technologies Inc. common stock and is settled in cash upon his termination of service as a director.

What are phantom stock units in the context of MTX’s director compensation?

For MTX, each phantom stock unit is the economic equivalent of one share of common stock but is settled in cash, not shares. The units accrue under the Non-Funded Deferred Compensation and Unit Award Plan for Non-Employee Directors and are paid when the director’s board service ends.

Was Robert L. Clark’s MTX phantom stock unit grant made under a Rule 10b5-1 trading plan?

No. The filing’s Rule 10b5-1 checkbox is not affirmed, and there is no footnote stating that the transaction was made pursuant to a Rule 10b5-1 or other pre-arranged trading plan.

Will Robert L. Clark receive MTX shares or cash for these phantom stock units?

The filing states the phantom stock units are to be settled in cash upon his termination of service as a director. Although each unit tracks one share of MTX common stock economically, the settlement form is cash rather than stock.

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Available on EDGAR 09/09/2026 - 04:37 PM Accepted by SEC EDGAR 09/09/2026 - 04:37 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)
09/04/2026

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)	09/04/2026		A		56.357		(2)	(2)	COMMON STOCK	56.357	$0	33,758.075	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	09/09/2026
	** 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)