Minerals Technologies (NYSE: MTX) CEO exercises options and sells 21,568 shares

Rhea-AI Filing Summary

Minerals Technologies Inc. chairman and CEO Douglas T. Dietrich reported an option exercise and related share sale in company stock. He exercised employee stock options for 21,568 shares of Common Stock at $78.0250 per share and sold 21,568 shares in an open-market transaction at a weighted average price of $81.5292 per share, with prices ranging from $81.140 to $81.960. After these transactions, he holds 175,973 Common Stock shares directly and 4,735.457 shares indirectly through a 401(k) plan as of May 14, 2026.

Insider Trade Summary

Net Seller: 21,568 shares ($1,758,422)

Net Sell 4 txns

Insider DIETRICH DOUGLAS T

Role CHAIRMAN AND CEO

Sold 21,568 shs ($1.76M)

Type	Security	Shares	Price	Value
Exercise	Employee Stock Options (Right to Buy)	21,568	$0.00	--
Exercise	Common Stock	21,568	$78.025	$1.68M
Sale	Common Stock	21,568	$81.5292	$1.76M
holding	Common Stock	--	--	--

Holdings After Transaction: Employee Stock Options (Right to Buy) — 0 shares (Direct, null); Common Stock — 197,541 shares (Direct, null); Common Stock — 4,735.457 shares (Indirect, By 401(k))

Footnotes (1)

1. Weighted average price representing high of $81.960 and low of $81.140. The information contained in this report is based on a Plan Statement as of May 14, 2026. The options were granted on January 17, 2017 and vested in three equal annual installments beginning on January 17, 2018.

Key Figures

Shares sold: 21,568 shares Weighted average sale price: $81.5292 per share Options exercised: 21,568 shares +3 more

6 metrics

Shares sold 21,568 shares Common Stock sold in open-market transaction on May 14, 2026

Weighted average sale price $81.5292 per share Open-market sale of Common Stock; trades between $81.140 and $81.960

Options exercised 21,568 shares Employee Stock Options (Right to Buy) for Common Stock

Option exercise price $78.0250 per share Conversion or exercise price for Employee Stock Options

Direct holdings after transaction 175,973 shares Common Stock held directly by CEO after transactions

Indirect 401(k) holdings 4,735.457 shares Common Stock held indirectly through 401(k) as of May 14, 2026

Key Terms

open-market sale, Employee Stock Options (Right to Buy), weighted average price, indirect ownership

4 terms

open-market sale financial

"transaction_action: "open-market sale" for 21,568 Common Stock shares"

An open-market sale is when a shareholder sells existing shares directly on a public exchange to any willing buyer, rather than through a private deal. Think of it like putting goods on a busy market stall where price is set by supply and demand; for investors it matters because such sales increase available supply, can put short-term downward pressure on the stock price, and signal changes in liquidity or investor confidence.

Employee Stock Options (Right to Buy) financial

"security_title: "Employee Stock Options (Right to Buy)" for derivative transaction"

weighted average price financial

"footnote: "Weighted average price representing high of $81.960 and low of $81.140.""

Weighted average price is the average price of a security where each trade or component is counted according to its size, so bigger trades pull the average more than smaller ones. Think of it like calculating the average cost of a grocery haul where items you bought more of have greater influence on the final per-item cost. Investors use it to understand the true average price paid or received, judge execution quality, and compare trading performance against market movement.

indirect ownership financial

"direct_or_indirect: "I" and nature_of_ownership: "By 401(k)""

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^*

DIETRICH DOUGLAS T

(Last) (First) (Middle)

622 THIRD AVENUE

(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
X	Officer (give title below)		Other (specify below)
	CHAIRMAN AND CEO

2a. Foreign Trading Symbol

3. Date of Earliest Transaction (Month/Day/Year)
05/14/2026

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
Common Stock	05/14/2026		M		21,568	A	$78.025	197,541	D
Common Stock	05/14/2026		S		21,568	D	$81.5292(1)	175,973	D
Common Stock								4,735.457	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
Employee Stock Options (Right to Buy)	$78.025	05/14/2026		M			21,568	(3)	01/17/2027	Common Stock	21,568	$0	0	D

Explanation of Responses:

1. Weighted average price representing high of $81.960 and low of $81.140.

2. The information contained in this report is based on a Plan Statement as of May 14, 2026.

3. The options were granted on January 17, 2017 and vested in three equal annual installments beginning on January 17, 2018.

	/s/ Timothy J Jordan for Douglas Dietrich	05/18/2026
	** 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)

FAQ

What did MTX CEO Douglas T. Dietrich report in this Form 4?

Douglas T. Dietrich reported an option exercise and related share sale involving Minerals Technologies Inc. Common Stock. He exercised options for 21,568 shares at $78.0250 per share and sold 21,568 shares in an open-market transaction on May 14, 2026.

How many Minerals Technologies (MTX) shares did the CEO sell and at what price?

He sold 21,568 shares of Minerals Technologies Common Stock in an open-market transaction. The weighted average sale price was $81.5292 per share, with individual trades executed between $81.140 and $81.960 per share, according to the filing footnotes.

What options did the MTX CEO exercise in this filing?

He exercised Employee Stock Options covering 21,568 shares of Minerals Technologies Common Stock at a conversion or exercise price of $78.0250 per share. These options were originally granted on January 17, 2017 and vested in three equal annual installments starting January 17, 2018.

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

Following the reported transactions, Douglas T. Dietrich holds 175,973 shares of Minerals Technologies Common Stock directly. In addition, he has an indirect holding of 4,735.457 shares through a 401(k) plan, based on a plan statement dated May 14, 2026.

Was the MTX CEO’s transaction a buy or a sell overall?

The filing shows a combination of actions: he exercised options to acquire 21,568 shares and sold 21,568 shares in an open-market transaction. Overall, the net activity in open-market trading was a sale of 21,568 shares of Minerals Technologies Common Stock.

Are there any Employee Stock Options remaining after this MTX Form 4?

The derivative position shown in the filing, an Employee Stock Options (Right to Buy) grant for 21,568 shares, has a reported post-transaction balance of 0.0000. This indicates that specific option grant was fully exercised, with no remaining shares under that grant.