Kathleen Flaherty Burke

Companies

• MKS INCSr. VP, GC & Secretary May 9, 2019 to now¹

Holdings

Stock this person has reported owning, from the forms officers and directors file with the SEC. See the biggest insider stakes.

Shares held

• MKMKS INC MKSI49,439 shares²$11.1M at $225.48May 11, 2026

As of each latest filing. The line shows shares held over time.

Recent filings

• May 11, 2026Sold 4,355 shares at $319.94 of MKS INC²
• Feb 20, 2026Sold 4,254 shares at $250.00 of MKS INC³
• Feb 17, 2026Shares withheld for tax 5,318 shares at $260.74 of MKS INC⁴
• Feb 17, 2026Exercised options 2,493 shares of MKS INC⁴
• Feb 17, 2026Exercised options 2,336 shares of MKS INC⁴
• Feb 17, 2026Exercised options 1,576 shares of MKS INC⁴
• Feb 17, 2026Exercised options 563 shares of MKS INC⁴
• Feb 17, 2026Exercised options 1,788 shares of MKS INC⁴
• Feb 17, 2026Exercised options 3,451 shares of MKS INC⁴
• Oct 31, 2025Shares withheld for tax 777 shares at $143.71 of MKS INC⁵
• Oct 31, 2025Exercised options 341 shares of MKS INC⁵
• Oct 31, 2025Exercised options 144 shares of MKS INC⁵
• Oct 31, 2025Exercised options 82 shares of MKS INC⁵
• Oct 31, 2025Exercised options 52 shares of MKS INC⁵
• Oct 31, 2025Exercised options 158 shares of MKS INC⁵
• Feb 18, 2025Shares withheld for tax 3,970 shares at $103.67 of MKS INC⁶
• Feb 18, 2025Exercised options 1,648 shares of MKS INC⁶
• Feb 18, 2025Exercised options 588 shares of MKS INC⁶
• Feb 18, 2025Exercised options 1,870 shares of MKS INC⁶
• Feb 18, 2025Exercised options 3,608 shares of MKS INC⁶
• Feb 18, 2025Exercised options 1,645 shares of MKS INC⁶
• Feb 18, 2025Exercised options 2,287 shares of MKS INC⁶
• Mar 1, 2024Sold 7,411 shares at $122.89 of MKS INC⁷
• Feb 15, 2024Shares withheld for tax 4,912 shares at $122.15 of MKS INC⁸
• Feb 15, 2024Exercised options 1,869 shares of MKS INC⁸