[144] MKS Inc. SEC Filing

Rhea-AI Filing Summary

MKS Instruments, Inc. (symbol: MKSI) has filed a Form 144, indicating the planned sale of restricted stock that has recently vested. The filing covers a total of 2,000 common shares—sourced from four separate restricted-stock vesting events between February 2021 and February 2022—representing approximately 0.003% of the company’s 67.07 million shares outstanding.

Key details of the proposed sale:

• Share amount: 2,000 common shares
• Estimated market value: US $210,000
• Broker: Fidelity Brokerage Services LLC, Smithfield, RI
• Planned execution date: on or about 03 July 2025
• Exchange: NASDAQ

The seller attests that no material non-public adverse information is known and that the transaction complies with Rule 144 conditions. The form shows no prior sales within the last three months, suggesting this is the first liquidation step for this block of vested stock. Given the small size relative to MKSI’s float and market capitalization, the filing is generally viewed as routine administrative disclosure rather than a market-moving event.

Insights

Financial Analyst

TL;DR: Insider plans to sell 2,000 MKSI shares (~$210k); stake is immaterial, so impact is neutral.

The Form 144 signals an insider’s intention to monetize a modest lot of recently vested restricted stock. With only 2,000 shares against 67 million outstanding, dilution or supply pressure is negligible. No pattern of recent selling is disclosed, and the seller affirms awareness of no undisclosed adverse information. For investors, the notice does not alter the fundamental thesis or valuation framework for MKSI; it is a standard compliance event.

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	2000	210000.00	67072198	07/03/2025	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	02/15/2021	Restricted Stock Vesting	Issuer			826	02/15/2021	Compensation
Common	04/13/2021	Restricted Stock Vesting	Issuer			251	04/13/2021	Compensation
Common	04/15/2021	Restricted Stock Vesting	Issuer			338	04/15/2021	Compensation
Common	02/15/2022	Restricted Stock Vesting	Issuer			585	02/15/2022	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

Nothing to Report

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

How many MKSI shares are being sold under this Form 144 filing?

The filing covers 2,000 common shares.

What is the estimated market value of the MKSI shares to be sold?

The aggregate market value is approximately US $210,000.

When is the planned sale date for the MKSI shares?

The filer expects to sell on or about July 3, 2025.

What percentage of MKSI’s shares outstanding does this sale represent?

Roughly 0.003% of the 67.07 million shares outstanding.

Which brokerage will execute the proposed MKSI share sale?

The shares are to be sold through Fidelity Brokerage Services LLC.