EVP David Philip Henry sold 6,000 shares of MKSI at $314.43 for $1.9M; stock up 40.5% in 90 days.
David Philip Henry, EVP Global Strategy Marketing & GM at MSD, sold 6,000 shares of MKS INC at $314.43 on 2026-06-01, reducing his holdings from 16,421 to 10,421 shares (a -36.5% reduction). The stock has appreciated 40.5% over the prior 90 days and currently trades at $330.43, near the 52-week high of $339.00. His cross-ticker track record shows only 1 prior buy, and at MKSI specifically, his single measurable prior transaction was a buy on 2023-11-07 with outcome not yet measurable, so no historical timing pattern exists at this ticker. The sale occurred as the stock reached elevated valuations (P/E of 68.27) following a strong 90-day run, though his prior open-market activity has been minimal, limiting inference about conviction or strategic intent behind this particular transaction.