MKS Inc. CEO Disposes of Shares for Tax Obligations
MKS INC
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Filing Summary
MKS Inc. (NASDAQ: MKSI) Form 4 Filing Update
Insider: Lee John Tseng-Chung (President & CEO, Director) Transaction Date: October 30, 2026 Transaction Type: Tax Withholding (Code F) Shares Transacted: 2,157.445 @ $202.04 Total Value: $435,890.19 Shares Held After: 134,776.2667 Significance: Low (Mandatory tax withholding associated with RSU acceleration for FICA taxes)
Comprehensive Analysis
Executive Summary
On November 3, 2026, MKS Inc. (NASDAQ: MKSI) reported Form 4 activity for President and Chief Executive Officer John Tseng-Chung Lee involving the vesting and tax withholding of restricted stock units (RSUs).
Transaction Breakdown
- RSU Vesting (Code M):
- An aggregate of 2,157.445 RSUs (1,478.864 units from a 2025 award and 678.581 units from a 2026 award) were accelerated and converted into shares of Common Stock on October 30, 2026.
- Tax Withholding (Code F):
- Exactly 2,157.445 shares were withheld by the issuer at a price of $202.04 per share, totaling $435,890.19, specifically to satisfy FICA tax obligations.
- Post-Transaction Holdings:
- Following the settlement, Dr. Lee continues to hold 134,776.2667 shares of MKS Inc. Common Stock directly, along with 82,670.676 unvested RSUs.
Market and Trading Assessment
- Significance: Low.
- This transaction does not represent discretionary open-market buying or selling. The acceleration and simultaneous share withholding were executed purely to cover statutory FICA tax withholding liabilities.
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Important Disclaimer
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