Kathleen Flaherty Burke insider trades: Mks (MKSI) stock sales
Trades on the price chart
Daily close, with an arrow on each day they bought or sold
Companies
Where Kathleen reports to the SEC
Open-market buys and sales
5 trades reported on SEC Form 4, newest first
| Date | Stock | Type | Shares | Price | Value | Holding | Reported |
|---|---|---|---|---|---|---|---|
| May 11, 2026 | MKSI | ↓ Sell | 4,355 | $319.94 | $1.4M | Direct | May 12, 2026 (1d) |
| Feb 20, 2026 | MKSI | ↓ Sell | 4,254 | $250.00 | $1.1M | Direct | Feb 23, 2026 (3d) |
| Mar 1, 2024 | MKSI | ↓ Sell | 7,411 | $122.89 | $911K | Direct | Mar 4, 2024 (3d) |
| Aug 7, 2023 | MKSI | ↓ Sell | 11,563 | $101.23 | $1.2M | Direct | Aug 8, 2023 (1d) |
| Oct 30, 2019 | MKSI | ↓ Sell | 10,384 | $110.55 | $1.1M | Direct | Oct 31, 2019 (1d) |
Each row is one filing's trades in one stock, summed. Shares and prices are as filed, before any later stock split.
Other MKSI insiders
Open-market trades in the last 12 months
About Kathleen Flaherty Burke's insider trades
Kathleen Flaherty Burke is EVP, GC & Secretary at Mks (MKSI). Since Oct 30, 2019, Kathleen has reported no open-market purchases and 5 sales worth $5.7M on SEC Form 4. In the last 12 months: 2 sales ($2.5M).
Their filings also include grants and awards (14 filings), option exercises (10 filings), shares withheld for taxes (10 filings). These aren't open-market trades and aren't counted above.
How to read insider trades
Officers, directors and owners of more than 10% of a company must report trades in its stock on SEC Form 4, usually within two business days. Purchases with their own money are the stronger signal: insiders sell for many reasons (taxes, diversification, a house), but buy for one. See every MKSI insider trade, the latest insider trades across the market, or cluster buys, when several insiders buy the same stock within days.