Donahue Joseph B 4

What Happened

• Joseph B. Donahue, a director of MKS Inc (MKSI), was granted 781.959 restricted stock units (RSUs) on 2026-05-11. The transaction is reported as an award/grant (code A); no purchase price or cash consideration is associated with the grant (price reported as N/A).

Key Details

• Transaction date: 2026-05-11; Form 4 filed: 2026-05-12 (filed the next day).
• Shares granted: 781.959 RSUs; reported price: N/A (award).
• Shares owned after transaction: Not specified in the filing excerpt.
• Footnotes: F1 — RSUs vest in full the day before the first annual shareholders’ meeting after the grant, or on the 13‑month anniversary if no meeting occurs within 13 months. F2 — Each RSU represents the contingent right to receive one share of MKS common stock (1:1 conversion).
• Transaction code: A = Award/Grant. No 10b5‑1 plan, tax withholding, or sale reported in this filing.

Context

• This is an equity award (not a purchase or sale). RSU grants are compensation/incentive awards for insiders and don’t indicate an immediate cash outlay or sale; they convert to shares only if and when vesting conditions are met.