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 director CANNONE PETER III sold 1,250.0000 shares of common stock in an open-market transaction on February 20, 2026 at a weighted average price of $258.0596 per share. After the sale, he directly owned 8,362.0800 shares. The sale was executed in multiple trades between $258.040 and $258.285 per share.
MKS INC executive Eric Robert Taranto, EVP & GM, VSD, reported an open-market sale of 1,452.73 shares of common stock at $247.55 per share on February 20, 2026. After this transaction, he directly owned 20,012.6404 common shares.
MKS INC executive Henry David Philip reported an open-market sale of company stock. On this Form 4, he sold 2,000 shares of MKS INC common stock at a price of $261.5601 per share. After this transaction, he directly owns 18,841.368 shares of MKS INC common stock.
MKS INC vice president and chief accounting officer Michelle M. McCarthy reported selling a total of 1,466 shares of common stock in open-market transactions on February 20, 2026. The sales were executed at weighted average prices of $249.5674 and $250.3479 per share, in multiple trades within stated price ranges. Following these sales, her directly held common stock position reported in this filing was reduced to zero shares.
MKS Inc director Jacqueline F. Moloney reported an open-market sale of company stock. She sold 829 shares of MKS Inc common stock at a price of $247.55 per share on February 20, 2026. After this transaction, she still directly owns 10,733.304 shares of MKS Inc common stock.
MKS INC executive John Edward Williams, EVP & GM, PSD, reported an open-market sale of 2,042.625 shares of common stock on February 20, 2026 at a weighted average price of $256.4075 per share. After this sale, he directly owns 3,640.099 common shares. The sale was executed in multiple trades between $256.3902 and $257.150 per share.
MKS Inc executive Kathleen Flaherty Burke, EVP, GC & Secretary, reported an open-market sale of 4,254 shares of Common Stock at $250.00 per share on February 20, 2026. After this sale, she directly owns 53,794.485 shares of MKS Inc common stock.
MKS Inc. President & CEO Lee John Tseng-Chung reported selling a total of 30,000 shares of common stock in open-market transactions. The sales occurred on February 20, 2026 at weighted average prices around $256–$260 per share across multiple trade executions.
Individual reported trades covered 13,310 shares at $256.0538, 12,812 shares at $256.9313, 1,988 shares at $257.8084, and 1,890 shares at $259.7032. After these transactions, he directly owns about 154,696.1077 shares of MKS Inc. common stock.
MKS Incorporated submitted a Form 144 notice reporting proposed sales of common stock. The excerpt lists multiple stock-grant line items with specific share counts and dates, including entries of 10,979, 4,269, and 4,748.