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.
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 EVP & COO James Alan Schreiner reported selling a total of 3,500 shares of MKS Inc common stock on June 12, 2026 in three open-market transactions. The shares were sold at weighted average prices of $347.00, $346.41 and $345.52 per share. After these sales, Schreiner directly holds 19,201.121 MKS Inc common shares.
MKSI submitted a Form 144 notice reporting a proposed sale of common stock by an affiliate. The filing lists multiple plan-originated grants and vesting events and shows a recent disposition of 781 shares on 06/10/2026 for $247,905.02.
MKS Inc executive James Alan Schreiner, the company’s EVP & COO, reported an open-market sale of 781 shares of Common Stock on June 10, 2026 at an average price of $317.42 per share.
After this transaction, Schreiner directly holds 22,701.121 shares of MKS Inc common stock. The sale was executed under a pre-arranged Rule 10b5-1 trading plan that he adopted on March 10, 2026, indicating the trade was scheduled in advance rather than timed discretionarily.
MKS Inc senior vice president and chief accounting officer Michelle M. McCarthy sold 2,434 shares of common stock in an open-market transaction at $315.23 per share. After the sale, she directly holds 1.5490 shares. The transaction was carried out under a pre-arranged Rule 10b5-1 trading plan adopted on March 5, 2026, indicating it was scheduled in advance.
MKS Inc EVP, GC & CCO Renee Martel Donlan filed an initial ownership report showing her equity stake in the company. She directly holds 9,471.7084 shares of common stock and several restricted stock unit (RSU) awards tied to common shares that vest in installments beginning on April 15, 2027.
MKS Inc executive Henry David Philip reported an open-market sale of company stock. On June 1, 2026, he sold 6,000 shares of MKS Inc Common Stock in an open-market transaction at a weighted average price of $314.4305 per share. Following this sale, he directly owns 10,421.527 shares of MKS Inc Common Stock. The filing notes the trade was executed in multiple lots at prices ranging from $314.2425 to $314.955, with the reported price representing the weighted average.
MKS Inc director Elizabeth Mora reported an open-market sale of 300 shares of MKS Inc Common Stock at $318.02 per share on June 1, 2026. The sale was executed under a pre-arranged Rule 10b5-1 trading plan adopted on February 23, 2026. After this transaction, she directly holds 19,145.353 shares of MKS Inc Common Stock.
MKSI affiliate disclosed a proposed sale of 6,000 shares of common stock, with an aggregate amount listed as $1,886,582.90 and a reference share count of 67,544,129 dated 06/01/2026. The filing notes prior sales of 2,500 shares by David Henry on 05/26/2026 for $826,250.00. Several prior issuances (ESPP purchases and restricted stock vesting) are itemized with dates and share counts.