MKS Inc Director Elizabeth Mora Files Form 144 to Sell $75.3K in Shares Under 10b5-1 Plan

Executive Summary

On September 1, 2026, Elizabeth A. Mora, a Director at MKS INC ($MKSI), filed SEC Form 144 notifying the intent to sell 300 shares of common stock through Fidelity Brokerage Services LLC. The estimated aggregate market value of the proposed transaction is $75,288.00, representing an estimated share price of $250.96.

Transaction Details

• Security Type: Common Stock
• Number of Shares: 300
• Aggregate Market Value: $75,288.00
• Approximate Sale Date: September 1, 2026
• Origin of Securities: Acquired on May 11, 2026, via restricted stock vesting as part of equity compensation.
• Trading Plan: Executed pursuant to a Rule 10b5-1 trading plan established on February 23, 2026.

Historical Context & Market Impact

• Past Transactions: The filer previously sold 300 shares on June 1, 2026, generating $95,406.00 in gross proceeds.
• Ownership Dilution: With 67,617,558 shares outstanding, the proposed sale constitutes a negligible fraction (<0.001%) of the issuer's total common shares.
• Significance: Low. The transaction represents a small, scheduled disposition under a pre-established Rule 10b5-1 trading plan following equity compensation vesting.