Director at MKS Inc (MKSI) sells 829 shares at $247.55 each

Rhea-AI Filing Summary

MKS Inc director Jacqueline F. Moloney reported an open-market sale of company stock. She sold 829 shares of MKS Inc common stock at a price of $247.55 per share on February 20, 2026. After this transaction, she still directly owns 10,733.304 shares of MKS Inc common stock.

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^*

Moloney Jacqueline F

(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)

X	Director		10% Owner
	Officer (give title below)		Other (specify below)

3. Date of Earliest Transaction (Month/Day/Year)
02/20/2026

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	02/20/2026		S		829	D	$247.55	10,733.304	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:

	/s/ M. Kathryn Rickards, attorney-in-fact	02/23/2026
	** 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.

FAQ

What insider transaction did MKS Inc (MKSI) report for Jacqueline F. Moloney?

MKS Inc reported that director Jacqueline F. Moloney sold 829 shares of common stock. The transaction was an open-market sale at $247.55 per share, and it was recorded as a direct ownership change on February 20, 2026.

How many MKS Inc (MKSI) shares did Jacqueline F. Moloney sell and at what price?

Jacqueline F. Moloney sold 829 shares of MKS Inc common stock at $247.55 per share. The sale was classified as an open-market transaction and is reported as a non-derivative transaction under the company’s common stock.

How many MKS Inc (MKSI) shares does Jacqueline F. Moloney own after this sale?

After the reported sale, Jacqueline F. Moloney directly owns 10,733.304 shares of MKS Inc common stock. This remaining balance reflects her holdings following the 829-share open-market sale disclosed in the Form 4 filing.

What does the Form 4 sale by Jacqueline F. Moloney at MKS Inc (MKSI) represent?

The Form 4 shows a routine insider transaction where director Jacqueline F. Moloney sold 829 common shares. It is categorized as an open-market sale, indicating a standard market trade rather than option exercises or derivative-related activity.

Was the MKS Inc (MKSI) insider transaction by Jacqueline F. Moloney a buy or sell?

The insider transaction was a sell. Jacqueline F. Moloney executed an open-market sale of 829 shares of MKS Inc common stock at $247.55 per share, reducing but not eliminating her directly held share position.