Welcome to our dedicated page for MKS SEC filings (Ticker: MKSI), a comprehensive resource for investors and traders seeking official regulatory documents including 10-K annual reports, 10-Q quarterly earnings, 8-K material events, and insider trading forms.
The MKS Inc. (NASDAQ: MKSI) SEC filings page on Stock Titan provides access to the company’s regulatory disclosures as filed with the U.S. Securities and Exchange Commission. MKS Inc., incorporated in Massachusetts, describes itself as a global provider of enabling technologies for leading edge semiconductor manufacturing, electronics and packaging, and specialty industrial applications. Its filings offer detailed information on financial performance, risk factors, capital structure and other matters relevant to investors and analysts.
Through this page, users can review current and historical filings such as annual reports on Form 10-K and quarterly reports on Form 10-Q, which describe net revenues by end market, including Semiconductor, Electronics & Packaging, and Specialty Industrial, and by category as products and services. Current reports on Form 8-K, including those announcing quarterly financial results, provide updates on results of operations and financial condition and may reference attached earnings press releases.
AI-powered summaries on Stock Titan help explain the key points from lengthy MKS Inc. filings, highlighting important disclosures without requiring readers to parse every section. Real-time updates from the EDGAR system ensure that new MKSI filings, such as 8-Ks reporting material events, are added as they become available.
Users can also use this page to locate information on topics typically covered in SEC documents, such as debt levels, non-GAAP financial measures reconciliations, risk factors related to markets and operations, and details referenced in the company’s ESG and strategic discussions. By combining direct access to official filings with AI-generated insights, the MKS Inc. filings page supports a more efficient review of the regulatory record behind the MKSI stock.
MKS Inc ownership filing shows Vanguard Capital Management beneficially owns 3,528,836 shares of common stock, representing 5.24% of the class as reported 03/31/2026. The filer reports sole voting power for 514,635 shares and sole dispositive power for 3,528,836 shares.
The disclosure states ownership includes securities held for Vanguard funds and client accounts over which affiliated Vanguard entities exercise voting or dispositive power. The filing is signed by Vanguard’s Head of Global Fund Administration on 04/30/2026.
MKS Inc ownership disclosure: Vanguard Portfolio Management reports beneficial ownership of 3,700,062 shares of Common Stock, representing 5.49% of the class as reported. The filing states Vanguard exercises sole dispositive power over these shares and includes holdings managed for Vanguard funds and clients.
The filing attributes 14,569 shares of sole voting power to Vanguard Portfolio Management and clarifies the holdings reflect securities held by Vanguard funds and other managed accounts; timing and trading intent are not stated.
MKS Inc EVP & GM, PSD John Edward Williams reported routine equity compensation activity involving restricted stock units (RSUs). On April 17, 2026, RSUs representing 1,740.714 shares of common stock were converted into common shares, reflecting the vesting of previously granted awards.
To cover tax withholding obligations from this RSU vesting, 825.969 common shares were withheld by MKS Inc, which the company notes does not represent a discretionary trade by Williams. Following these transactions, he directly holds 5,380.813 shares of MKS Inc common stock.
MKS Inc. senior vice president and chief accounting officer Michelle M. McCarthy reported equity compensation activity involving restricted stock units (RSUs) and related common stock on April 15, 2026. She received a grant of 1,672.862 RSUs, each representing a contingent right to one share of MKS common stock, which will vest in three equal annual installments beginning on April 15, 2027.
On the same date, RSUs in amounts of 968, 1,107, and 1,736 units were exercised or converted into the same number of common shares as part of earlier awards that vest in three annual installments beginning on April 15, 2025 and April 15, 2026. To cover tax withholding obligations triggered by these vestings, 1,375.451 common shares were withheld by MKS Inc. at a price of $274.15 per share, which the filing notes was not a discretionary trade. Following these transactions, McCarthy directly held 2,435.549 shares of common stock and 7,388.160 RSUs.
MKS Inc. reported that Executive Vice President, General Counsel and Secretary Kathleen F. Burke plans to retire from her officer roles effective June 1, 2026. She notified the company on March 31, 2026 and will continue as a special advisor until July 1, 2026 to support the transition.
MKS Inc. is asking shareholders at the 2026 Annual Meeting to elect three directors, expand its equity incentive capacity, and approve several key governance and compensation items. The meeting will be held on May 11, 2026 at the company’s Andover, Massachusetts headquarters.
A central proposal is approval of the Amended and Restated 2022 Stock Incentive Plan, which would increase the share reserve by 6,200,000 shares of common stock, raising the pool from 6,200,274 to 12,400,274 shares. The plan continues to emphasize full-value RSU awards, a fungible share pool, no option/SAR repricing without shareholder approval, and a $750,000 annual cap on non-employee director cash and equity compensation.
Shareholders will also vote on an advisory say-on-pay resolution, ratification of PricewaterhouseCoopers as auditor for 2026, and two competing proposals to lower the ownership threshold to call a special meeting—one company proposal to reduce it from 40% to 25% and a shareholder proposal to reduce it to 10%. The board recommends voting for the director slate, the amended equity plan, say-on-pay, auditor ratification, and the 25% threshold proposal, and against the 10% threshold proposal.
The Vanguard Group filed an amendment to its Schedule 13G/A for MKS Inc reporting 0 shares beneficially owned and 0% of the class. The filing explains an internal realignment completed on January 12, 2026 that caused certain Vanguard subsidiaries or business divisions to report ownership separately under SEC Release No. 34-39538.
The amendment states Vanguard no longer is deemed to beneficially own securities held by those subsidiaries or divisions and lists its reporting address and signing officer.
MKS Inc. is soliciting proxies for its 2026 Annual Meeting of Shareholders to be held on May 11, 2026.
The meeting agenda includes the election of three directors, the approval of an Amended and Restated 2022 Stock Incentive Plan to increase the share reserve by 6,200,000 shares to a total of 12,400,274 shares, advisory votes on executive compensation and a Company proposal to lower the special‑meeting threshold to 25%, ratification of PricewaterhouseCoopers LLP as independent auditor, and consideration of a shareholder proposal to lower the threshold to 10%. Shares outstanding were 67,321,698 as of March 3, 2026. The Board recommends voting FOR the director nominees and Proposals 2, 3, 4, and 5 and AGAINST Proposal 6.
MKS INC director Jacqueline F. Moloney reported an open-market sale of 340.107 shares of common stock on March 12, 2026 at a weighted average price of $213.7717 per share. The trades were executed in multiple transactions between $213.7716 and $214.015 per share.
After this sale, Moloney directly owns 10,393.197 shares of MKS INC common stock. The filing notes that detailed trade-by-trade pricing and share data are available upon request.