781.959 RSUs granted to MKS Inc director

Batra Raj reported acquisition or exercise transactions in this Form 4 filing.

Rhea-AI Filing Summary

Batra Raj reported acquisition or exercise transactions in this Form 4 filing.

MKS Inc director Raj Batra received a grant of 781.959 restricted stock units (RSUs) of common stock. Each RSU represents the right to receive one MKS share. These RSUs become fully vested on the day before the first annual shareholder meeting after the grant date (or after 13 months if no meeting is held), bringing his direct holdings to 16,227.298 shares.

Insider Trade Summary

Grant/Award: 781.959 shares

Grant/Award 1 txn

Insider Batra Raj

Role Director

Type	Security	Shares	Price	Value
Grant/Award	Common Stock	781.959	$0.00	$0.00

Holdings After Transaction: Common Stock — 16,227.298 shares (Direct)

Footnotes (2)

1. F1. These restricted stock units become fully vested on the day prior to the first annual meeting of shareholders following the date of grant (or if no such meeting is held within 13 months after the date of grant, on the 13 month anniversary of the date of grant).
2. F2. Each restricted stock unit represents the contingent right to receive one share of common stock of MKS Inc.

Key Figures

RSUs granted: 781.959 units Price per unit: $0.0000 per unit Shares after transaction: 16,227.298 shares +2 more

5 metrics

RSUs granted 781.959 units Restricted stock units of common stock granted to director Raj Batra

Price per unit $0.0000 per unit Reported transaction price for the RSU grant

Shares after transaction 16,227.298 shares Total direct MKS Inc common shares held by Raj Batra after grant

Vesting trigger Day prior to first annual meeting Full vesting date relative to first annual shareholder meeting after grant

Alternative vesting date 13 months after grant Vesting timing if no annual shareholder meeting occurs within 13 months

Key Terms

restricted stock units, annual meeting of shareholders, contingent right, common stock

4 terms

restricted stock units financial

"These restricted stock units become fully vested on the day prior to the first annual meeting of shareholders following the date of grant"

Restricted stock units are a type of company reward where employees are promised shares of stock, but they only fully own these shares after meeting certain conditions, like staying with the company for a set time. They matter because they can become valuable assets and are often used to motivate employees to help the company succeed.

annual meeting of shareholders financial

"on the day prior to the first annual meeting of shareholders following the date of grant"

A yearly gathering where a company’s owners (shareholders) vote on key items like electing the board, approving executive pay, and ratifying auditors, and receive updates on performance and strategy. Think of it as an annual town hall for owners: it matters to investors because outcomes and disclosures can affect leadership, corporate direction, dividend and governance policies, and therefore the company’s risk and potential return.

contingent right financial

"Each restricted stock unit represents the contingent right to receive one share of common stock of MKS Inc."

common stock financial

"Each restricted stock unit represents the contingent right to receive one share of common stock of MKS Inc."

Common stock represents ownership shares in a company, giving investors a stake in its success and a say in important decisions through voting rights. It is the most common type of stock traded on markets and can provide income through dividends, as well as potential for value growth. For investors, holding common stock means sharing in the company’s profits and risks.

FAQ

AI-generated questions and answers. How Rhea-AI works. Not financial advice.

What did MKS Inc (MKSI) director Raj Batra report in this Form 4?

Director Raj Batra reported receiving 781.959 restricted stock units of MKS Inc common stock as a grant. These awards increase his direct holdings to 16,227.298 shares after the transaction, reflecting routine equity-based director compensation rather than an open-market stock purchase.

How many MKS Inc (MKSI) shares does Raj Batra hold after this grant?

After the grant, Raj Batra holds 16,227.298 shares of MKS Inc common stock directly. This total includes the impact of the 781.959 restricted stock units reported, which are equity awards that convert into shares when vesting conditions are satisfied under the company’s plan.

When do Raj Batra’s new MKS Inc restricted stock units vest?

The restricted stock units become fully vested on the day prior to the first annual meeting of shareholders following the grant date. If no annual meeting occurs within 13 months, full vesting instead happens on the 13‑month anniversary of the grant, according to the filing footnote.

What does each restricted stock unit granted to Raj Batra represent at MKS Inc (MKSI)?

Each restricted stock unit represents a contingent right to receive one share of MKS Inc common stock. The units themselves are not shares until vesting occurs; once vested, they are settled in common stock on a one‑for‑one basis as described in the footnotes.

Was Raj Batra’s MKS Inc equity grant an open-market stock purchase?

No, the transaction is coded as a grant or award, not an open‑market purchase. The Form 4 describes an acquisition of 781.959 restricted stock units at a price of $0.00 per unit, reflecting equity compensation granted by MKS Inc rather than buying shares in the market.

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

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Accepted by SEC EDGAR 05/12/2026 - 03:02 PM EDT 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^*

Batra Raj

(Last) (First) (Middle)

C/O MKS INC.

2 TECH DRIVE

(Street)

ANDOVER MASSACHUSETTS 01810

(City) (State) (Zip)

UNITED STATES

(Country)

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)

2a. Foreign Trading Symbol

3. Date of Earliest Transaction (Month/Day/Year)
05/11/2026

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	05/11/2026		A(1)		781.959	A	(2)	16,227.298	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. These restricted stock units become fully vested on the day prior to the first annual meeting of shareholders following the date of grant (or if no such meeting is held within 13 months after the date of grant, on the 13 month anniversary of the date of grant).

2. Each restricted stock unit represents the contingent right to receive one share of common stock of MKS Inc.

	/s/ M. Kathryn Rickards, attorney-in-fact	05/12/2026
	** 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)