MKS INC·4

May 12, 2:59 PM ET

COLELLA GERALD G 4

4 · MKS INC · Filed May 12, 2026

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MKS Inc (MKSI) Director Gerald G. Colella Receives RSU Award

What Happened Gerald G. Colella, a director of MKS Inc (MKSI), received a grant of 781.959 restricted stock units (RSUs) on May 11, 2026. The Form 4 lists this as an award/grant (transaction code A); no per-share price or immediate dollar value is reported (listed as N/A). These RSUs are contingent rights to receive one share each upon vesting.

Key Details

  • Transaction date: 2026-05-11 (Period of Report); Form 4 filed 2026-05-12 (timely).
  • Transaction type: Award/Grant (code A) of 781.959 RSUs; price reported as N/A.
  • Shares owned after transaction: Not disclosed in the provided excerpt.
  • Footnotes: F1 — RSUs vest the day before the first annual shareholders’ meeting after the grant, or on the 13-month anniversary if no meeting is held within 13 months. F2 — Each RSU equals the contingent right to one share of MKS common stock.
  • Filing timeliness: Appears timely (reported day after the grant).

Context RSU grants are a form of compensation for board members and do not represent an open-market purchase or sale. These units only convert to actual shares if and when they vest per the schedule above, so they do not provide immediate liquidity or indicate an immediate buy/sell signal. No tax-withholding or sale-upon-vesting details are disclosed in this filing.

Insider Transaction Report

Form 4
Period: 2026-05-11
Transactions
  • Award

    Common Stock

    [F1][F2]
    2026-05-11+781.9598,998.886 total
Holdings
  • Common Stock

    (indirect: By Trust)
    40,017
Footnotes (2)
  • [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).
  • [F2]Each restricted stock unit represents the contingent right to receive one share of common stock of MKS Inc.
Signature
/s/ M. Kathryn Rickards, attorney-in-fact|2026-05-12

Documents

1 file
  • 4
    form4.xmlPrimary

    PRIMARY DOCUMENT