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Director at MKS INC (NASDAQ: MKSI) sells 1,400 common shares

Filing Impact
(Moderate)
Filing Sentiment
(Negative)
Form Type
4

Rhea-AI Filing Summary

MKS INC director Jacqueline F. Moloney reported an open-market sale of company stock. On May 13, 2026, she sold 1,400 shares of Common Stock at an average price of $318.99 per share.

After this transaction, she directly holds 9,775.156 shares of MKS INC common stock. This filing reflects a director monetizing a portion of her existing equity position while retaining a substantial remaining stake.

Positive

  • None.

Negative

  • None.
Insider Moloney Jacqueline F
Role null
Sold 1,400 shs ($447K)
Type Security Shares Price Value
Sale Common Stock 1,400 $318.99 $447K
Holdings After Transaction: Common Stock — 9,775.156 shares (Direct, null)
Footnotes (1)
Shares sold 1,400 shares Open-market sale on May 13, 2026
Sale price per share $318.99 per share Reported transaction price for Common Stock
Shares held after transaction 9,775.156 shares Direct ownership following sale
Net shares sold 1,400 shares Net change in buy/sell activity in this Form 4
Common Stock financial
"The security title for this transaction is reported as Common Stock."
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.
open-market sale financial
"The transaction_action field classifies the trade as an open-market sale."
An open-market sale is when a shareholder sells existing shares directly on a public exchange to any willing buyer, rather than through a private deal. Think of it like putting goods on a busy market stall where price is set by supply and demand; for investors it matters because such sales increase available supply, can put short-term downward pressure on the stock price, and signal changes in liquidity or investor confidence.
Form 4 regulatory
"This insider transaction is disclosed in a Form 4 filing."
Form 4 is a official document that company insiders, such as executives or major shareholders, file with regulators whenever they buy or sell company shares. It provides transparency about how those with inside knowledge are trading, helping investors see if insiders are confident in the company's prospects or may be selling for personal reasons. This information can influence investor decisions by revealing insiders' perspectives on the company's value.
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Form 4 Insider Transactions: What Each Field Means →
SEC Form 4
FORM 4UNITED 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 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)
XDirector10% Owner
Officer (give title below)Other (specify below)
2a. Foreign Trading Symbol
3. Date of Earliest Transaction (Month/Day/Year)
05/13/2026		6. Individual or Joint/Group Filing (Check Applicable Line)
XForm 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)
CodeVAmount(A) or (D)Price
Common Stock05/13/2026S1,400D$318.999,775.156D
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)
CodeV(A)(D)Date ExercisableExpiration DateTitleAmount or Number of Shares
Explanation of Responses:
/s/ M. Kathryn Rickards, attorney-in-fact05/14/2026
** Signature of Reporting PersonDate
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)

Source: View Original Filing on SEC EDGAR

FAQ

What insider transaction did MKS INC (MKSI) disclose for Jacqueline F. Moloney?

MKS INC reported that director Jacqueline F. Moloney sold shares. She executed an open-market sale of 1,400 shares of Common Stock, as disclosed in a Form 4 insider trading report, reflecting a change in her personal equity position.

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

Jacqueline F. Moloney sold 1,400 MKS INC common shares. The reported average sale price was $318.99 per share on May 13, 2026, indicating a routine open-market sale of a defined block of stock.

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

After the sale, Jacqueline F. Moloney holds 9,775.156 shares. These shares represent her direct ownership of MKS INC Common Stock following the reported open-market disposition of 1,400 shares on May 13, 2026.

Was the MKS INC (MKSI) insider transaction a purchase or a sale?

The disclosed insider transaction was a sale of shares. Form 4 data classify it as an open-market sale of 1,400 shares of Common Stock, with the transaction direction labeled as a sell rather than an acquisition.

Did the MKS INC (MKSI) Form 4 include any derivative securities for Jacqueline F. Moloney?

The Form 4 shows no derivative securities for this transaction. The filing lists only a non-derivative Common Stock sale, and the derivativeSummary section contains no remaining options, warrants, or other derivative holdings in this report.