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 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.
MKSI affiliate proposes to sell 1,250 common shares through Fidelity Brokerage Services LLC, with the filing dated 02/20/2026. The notice lists 1,147 shares from restricted stock vesting on 05/09/2022 and 103 shares from an open-market purchase on 08/01/2022.
MKSI Form 144 notice lists a proposed sale of common shares associated with Fidelity Brokerage Services LLC. The filing entry shows the broker/holder line with values 1453, 359623.31, 67169474 and the date 02/20/2026. The schedule also lists four lots tied to restricted‑stock vesting and ESPP purchases: 556 (04/15/2021), 659 (04/17/2021), 152 (05/30/2025) and 86 (11/28/2025).