MKS INC (MKSI) EVP Eric Taranto reports sale of 4,567.879 shares

Rhea-AI Filing Summary

MKS INC executive Eric Robert Taranto, EVP & GM, VSD, reported an open-market sale of 4,567.879 shares of common stock on March 6, 2026 at a weighted average price of $220.522 per share. After this sale, he directly holds 15,444.7614 shares of MKS INC common stock.

The sale was executed in multiple trades at prices ranging from $220.3701 to $220.780, with the reported price representing the weighted average across those trades.

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

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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^*

Taranto Eric Robert

(Last) (First) (Middle)

C/O MKS INC.

2 TECH DRIVE

(Street)

ANDOVER MA 01810

(City) (State) (Zip)

2. Issuer Name and Ticker or Trading Symbol
MKS INC [ MKSI ]

5. Relationship of Reporting Person(s) to Issuer
(Check all applicable)

	Director		10% Owner
X	Officer (give title below)		Other (specify below)
	EVP & GM, VSD

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
Common Stock	03/06/2026		S		4,567.879	D	$220.522(1)	15,444.7614	D

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

Explanation of Responses:

1. This transaction was executed in multiple trades at prices ranging from $220.3701 to $220.780. The price reported above reflects the weighted average sale price. The reporting person hereby undertakes to provide, upon request, the full information regarding the number of shares and prices at which the transaction was effected.

	/s/ James Kruger, attorney-in-fact	03/09/2026
	** 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).
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FAQ

What insider transaction did MKSI executive Eric Robert Taranto report?

Eric Robert Taranto reported selling 4,567.879 shares of MKS INC common stock. The transaction was an open-market sale on March 6, 2026, and reflects a routine insider trade rather than a company-level financing or operational event.

At what price did Eric Robert Taranto sell MKSI common stock shares?

The reported weighted average sale price was $220.522 per share. The shares were sold in multiple trades executed within a price range from $220.3701 to $220.780, with the weighted average summarizing those individual execution prices.

How many MKSI shares does Eric Robert Taranto own after this transaction?

Following the reported sale, Eric Robert Taranto directly owns 15,444.7614 shares of MKS INC common stock. This figure represents his direct holdings after the March 6, 2026 open-market sale of 4,567.879 shares reported in the Form 4 filing.

What role does Eric Robert Taranto hold at MKS INC (MKSI)?

Eric Robert Taranto serves as Executive Vice President and General Manager, VSD at MKS INC. His Form 4 filing reflects a personal open-market stock sale and does not describe changes to his corporate role or responsibilities at the company.

Was the MKSI insider transaction executed in a single trade or multiple trades?

The sale was executed in multiple trades within a tight price range. A footnote states trades occurred between $220.3701 and $220.780 per share, and the Form 4 reports a weighted average sale price of $220.522 for the 4,567.879 shares sold.