MKS Inc. SEC filings document operating results, capital-structure activity and governance matters for a Nasdaq-listed provider of technology solutions for semiconductor manufacturing, electronics and packaging, and specialty industrial applications. Form 8-K reports disclose results of operations and financial condition, financial guidance updates, material definitive agreements, debt refinancing activity, senior notes, credit facilities and registered common stock information.
The company’s proxy materials cover board and shareholder voting matters, executive compensation and related governance disclosures. Other current reports address officer transitions and compensation arrangements, providing formal records of management, governance and financing developments tied to MKS’s public-company structure.
MKS Inc. held its 2026 annual meeting, where shareholders approved an amendment to the 2022 Stock Incentive Plan that increases the shares authorized for issuance by 6,200,000 shares and updates the company name. Other plan terms remain unchanged.
Shareholders elected three directors and approved the amended plan, executive compensation on an advisory basis, and the ratification of PricewaterhouseCoopers LLP as auditor for 2026. They also approved, on an advisory basis, reducing the shareholder threshold to call a special meeting from 40% to 25%, while a separate shareholder proposal to lower the threshold to 10% did not pass.
MKS INC executive Eric Robert Taranto, EVP & GM, VSD, reported an open-market sale of common stock. On May 11, 2026, he sold 2,848.522 shares at a weighted average price of $319.930 per share in multiple trades between $319.930 and $320.345. After this transaction, he directly holds 12,596.2394 shares of MKS common stock.
Moloney Jacqueline F reported acquisition or exercise transactions in this Form 4 filing.
MKS Inc director Jacqueline F. Moloney received an equity award in the form of restricted stock units (RSUs). She was granted 781.959 shares of common stock-equivalent RSUs at no cash cost, increasing her direct holdings to 11,175.156 shares of common stock.
The RSUs will fully vest on the day before the first annual meeting of shareholders following the grant date, or, if no such meeting occurs within 13 months, on the 13‑month anniversary of the grant. Each RSU represents the right to receive one share of MKS Inc common stock upon vesting.
JABRE WISSAM G reported acquisition or exercise transactions in this Form 4 filing.
MKS Inc director Wissam G. Jabre received an equity award of 781.959 restricted stock units, each tied to one share of common stock at no cost per unit. These units become fully vested on the day before the first annual shareholder meeting following the grant date, or on the 13‑month anniversary if no meeting occurs within that period. After this grant, he directly holds 5,269.935 shares or equivalent units.
Mora Elizabeth reported acquisition or exercise transactions in this Form 4 filing.
MKS Inc director Elizabeth Mora reported an equity award of restricted stock units. On May 11, 2026, she received 781.959 restricted stock units of MKS Inc common stock as a grant, not a market purchase or sale, at a stated price of $0.00 per unit.
The units become fully vested on the day before the first annual meeting of shareholders following the grant date, or on the 13‑month anniversary of the grant if no such meeting occurs within that period. Each unit represents the right to receive one share of MKS Inc common stock, and after this award she holds 19,445.353 shares directly.
MKS INC executive Kathleen Flaherty Burke reported an open-market sale of 4,355 shares of Common Stock. The transaction occurred on May 11, 2026 at a weighted average price of $319.935 per share, executed in multiple trades between $319.715 and $320.670.
After this sale, Burke directly holds 49,439.485 shares of MKS INC common stock. The filing notes she can provide full trade details, including the number of shares and prices for each individual execution, upon request.
Donahue Joseph B reported acquisition or exercise transactions in this Form 4 filing.
MKS Inc. director Joseph B. Donahue received a grant of 781.959 restricted stock units of common stock as compensation. These units vest in full on the day before the first annual meeting of shareholders after the grant date, or on the 13‑month anniversary if no meeting occurs. After this award, Donahue directly holds a total of 12,132.704 shares of MKS common stock, assuming settlement of vested units in shares. Each restricted stock unit represents the right to receive one share of MKS Inc. common stock when it vests, so this filing reflects equity-based compensation rather than an open-market purchase.
CANNONE PETER III reported acquisition or exercise transactions in this Form 4 filing.
MKS Inc director Peter Cannone III reported an equity award on Form 4. He received 781.959 restricted stock units, each representing the right to receive one share of MKS common stock. These units vest in full just before the first annual shareholder meeting following the grant. After this award, he directly holds 9,144.039 shares of common stock.
Batra Raj reported acquisition or exercise transactions in this Form 4 filing.
MKS Inc director Raj Batra received a grant of 781.959 restricted stock units (RSUs) of common stock. Each RSU represents the right to receive one MKS share. These RSUs become fully vested on the day before the first annual shareholder meeting after the grant date (or after 13 months if no meeting is held), bringing his direct holdings to 16,227.298 shares.
COLELLA GERALD G reported acquisition or exercise transactions in this Form 4 filing.
MKS Inc director Gerald G. Colella reported a compensation-related equity grant. On May 11, 2026, he received 781.959 shares of common stock at $0.00 per share as a grant of restricted stock units that vest before the next annual shareholder meeting. After this award, he holds 8,998.886 common shares directly and 40,017 shares indirectly through The Gerald G. Colella 2019 Trust.