MKSI insider sale notice — 300 vested shares to be sold via Fidelity

Rhea-AI Filing Summary

Form 144 notice filed for MKSI insider sale. The filer plans to sell 300 shares of common stock through Fidelity Brokerage Services on NASDAQ with an aggregate market value of $36,642 and an approximate sale date of 10/01/2025. The 300 shares were acquired on 05/06/2024 through restricted stock vesting as compensation and were paid for on 05/06/2024. The filing also discloses a sale by Jacqueline Moloney of 300 shares on 08/01/2025 for gross proceeds of $27,630. By signing, the seller represents they are not aware of any undisclosed material adverse information about the issuer.

Insights

Securities Analyst

TL;DR: Small insider sale of vested restricted shares; transaction appears routine and not materially informative.

The filing documents a planned sale of 300 common shares valued at $36,642 and notes a prior sale of 300 shares for $27,630. The shares were acquired via restricted stock vesting on 05/06/2024 and paid as compensation, indicating these were employee-held, routine equity realizations rather than open-market dispositions after large holdings or transfers. The use of a broker (Fidelity) and the seller's attestation that no material nonpublic information exists align with standard compliance procedures for Rule 144 notices. Given the small size, this transaction is unlikely to move market perception or valuation materially.

Corporate Governance Expert

TL;DR: Governance controls appear followed; disclosure and attestation are standard for Rule 144 sales.

The notice includes required details: acquisition method (restricted stock vesting), acquisition and payment dates, broker information, planned sale timing, and past three-month sale. The seller's signature representation about material nonpublic information and reference to Rule 10b5-1 compliance language reflect adherence to insider-trading controls. No departures from expected governance or procedural concerns are evident from the provided content.

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

144: Issuer Information

Name of Issuer

SEC File Number

Address of Issuer

Phone

Name of Person for Whose Account the Securities are To Be Sold

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

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	36642.00	67159003	10/01/2025	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
Jacqueline Moloney 2 Tech Drive Andover MA 01810	Common	08/01/2025	300	27630.00

144: Remarks and Signature

Remarks

Date of Notice

Date of Plan Adoption or Giving of Instruction, If Relying on Rule 10b5-1

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

ATTENTION: Intentional misstatements or omission of facts constitute Federal Criminal Violations (See 18 U.S.C. 1001)

FAQ

What securities does the MKSI Form 144 cover?

The notice covers 300 shares of MKSI common stock to be sold through Fidelity on NASDAQ with an aggregate market value of $36,642.

How and when were the shares acquired for the MKSI sale?

The 300 shares were acquired on 05/06/2024 through restricted stock vesting and treated as compensation.

When is the approximate sale date and who is the broker?

The approximate sale date is 10/01/2025 and the broker is Fidelity Brokerage Services LLC.

Were any MKSI shares sold by the same person recently?

Yes. The filing lists a sale by Jacqueline Moloney of 300 shares on 08/01/2025 for gross proceeds of $27,630.

Does the filer attest to possession of material nonpublic information?

By signing the notice, the seller represents they do not know any material adverse information about the issuer that has not been publicly disclosed.