Elizabeth Mora reports sale of 300 MKSI shares

Elizabeth A. Mora reported the sale of 300 common shares of MKSI.

Rhea-AI Filing Summary

Elizabeth A. Mora reported the sale of 300 common shares of MKSI. The Form 144 lists 300 common shares sold with a reported aggregate amount of $47,643.00, and notes the securities were related to restricted stock vesting on 05/06/2024. The filing is dated 03/02/2026.

Insights

Securities Compliance Analyst

Routine Form 144 filing showing a small, post‑vesting sale of shares.

The filing records a sale of 300 common shares by Elizabeth A. Mora, tied to restricted stock vesting on 05/06/2024. The reported aggregate amount is $47,643.00, and the filing date is 03/02/2026.

This appears to be an administrative resale report under Section 144; cash‑flow treatment and broker details are limited to the entries in the excerpt. Subsequent filings would show any additional disposition or withholding events.

FAQ

What did the Form 144 for MKSI disclose about the transaction?

The Form 144 discloses that Elizabeth A. Mora sold 300 common shares of MKSI. The filing lists a reported aggregate amount of $47,643.00 and references restricted stock vesting dated 05/06/2024.

When were the shares associated with the MKSI Form 144 vested?

The excerpt shows the securities tied to a restricted stock vesting event on 05/06/2024. The Form 144 then reports the sale activity and the related quantity of 300 common shares in the filing.

How many MKSI shares were sold according to the filing and what was the amount?

The filing records a sale of 300 common shares with an aggregate figure of $47,643.00. The transaction entries in the excerpt present these numbers alongside the vesting and sale dates provided.

Does the Form 144 excerpt show who received sale proceeds for MKSI?

The excerpt reports the aggregate amount of $47,643.00 for the 300 shares but does not specify the recipient of proceeds beyond the reporting person, Elizabeth A. Mora. Broker or payee details are not included in the provided excerpt.

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

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Accepted by SEC EDGAR 03/02/2026 - 12:07 PM Learn about SEC filing dates

Form 144 Filer Information	UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 Form 144 NOTICE OF PROPOSED SALE OF SECURITIES PURSUANT TO RULE 144 UNDER THE SECURITIES ACT OF 1933
FORM 144

144: Filer Information

Filer CIK	0001548935
Filer CCC	XXXXXXXX
Is this a LIVE or TEST Filing?	LIVE TEST
Submission Contact Information
Name
Phone
E-Mail Address

144: Issuer Information

Name of Issuer	MKS INC
SEC File Number	000-23621
Address of Issuer	2 TECH DRIVE ANDOVER MASSACHUSETTS 01810
Phone	978-645-5500
Name of Person for Whose Account the Securities are To Be Sold	Mora Elizabeth
See the definition of "person" in paragraph (a) of Rule 144. Information is to be given not only as to the person for whose account the securities are to be sold but also as to all other persons included in that definition. In addition, information shall be given as to sales by all persons whose sales are required by paragraph (e) of Rule 144 to be aggregated with sales for the account of the person filing this notice.
Relationship to Issuer	Director

144: Securities Information

Title of the Class of Securities To Be Sold	Name and Address of the Broker	Number of Shares or Other Units To Be Sold	Aggregate Market Value	Number of Shares or Other Units Outstanding	Approximate Date of Sale	Name the Securities Exchange
Common	Fidelity Brokerage Services LLC 900 Salem Street Smithfield RI 02917	300	71832.00	67248357	03/02/2026	NASDAQ

Furnish the following information with respect to the acquisition of the securities to be sold and with respect to the payment of all or any part of the purchase price or other consideration therefor:

144: Securities To Be Sold

Title of the Class	Date you Acquired	Nature of Acquisition Transaction	Name of Person from Whom Acquired	Is this a Gift?	Date Donor Acquired	Amount of Securities Acquired	Date of Payment	Nature of Payment *
Common	05/06/2024	Restricted Stock Vesting	Issuer			300	05/06/2024	Compensation

* If the securities were purchased and full payment therefor was not made in cash at the time of purchase, explain in the table or in a note thereto the nature of the consideration given. If the consideration consisted of any note or other obligation, or if payment was made in installments describe the arrangement and state when the note or other obligation was discharged in full or the last installment paid.

Furnish the following information as to all securities of the issuer sold during the past 3 months by the person for whose account the securities are to be sold.

144: Securities Sold During The Past 3 Months

Name and Address of Seller	Title of Securities Sold	Date of Sale	Amount of Securities Sold	Gross Proceeds
Elizabeth A. Mora 2 Tech Drive Andover MA 01810	Common	12/02/2025	300	47643.00

144: Remarks and Signature

Remarks
Date of Notice	03/02/2026
Date of Plan Adoption or Giving of Instruction, If Relying on Rule 10b5-1	02/19/2025
ATTENTION:
The person for whose account the securities to which this notice relates are to be sold hereby represents by signing this notice that he does not know any material adverse information in regard to the current and prospective operations of the Issuer of the securities to be sold which has not been publicly disclosed. If such person has adopted a written trading plan or given trading instructions to satisfy Rule 10b5-1 under the Exchange Act, by signing the form and indicating the date that the plan was adopted or the instruction given, that person makes such representation as of the plan adoption or instruction date.
Signature	/s/ Jennifer Ruchti, as a duly authorized representative of Fidelity Brokerage Services LLC, as attorney-in-fact for Elizabeth A. Mora
ATTENTION: Intentional misstatements or omission of facts constitute Federal Criminal Violations (See 18 U.S.C. 1001)