PAGEInsider
| Ticker | Owner | Relationship | Date | Transaction | Cost | #Shares | Value ($) | #Shares Total | SEC Form 4 |
|---|---|---|---|---|---|---|---|---|---|
| MKSI | Burke Kathleen Flaherty | EVP, GC & Secretary | May 11 '26 | Sale | 319.94 | 4,355 | 1,393,317 | 49,439 | May 12 |
| MKSI | Burke Kathleen Flaherty | EVP, GC & Secretary | Feb 20 '26 | Sale | 250.00 | 4,254 | 1,063,500 | 53,794 | Feb 23 |
| MKSI | Burke Kathleen Flaherty | EVP, GC & Secretary | Feb 17 '26 | Option Exercise | 0.00 | 12,207 | 0 | 63,366 | Feb 18 |
| MKSI | Burke Kathleen Flaherty | EVP, GC & Secretary | Oct 31 '25 | Option Exercise | 0.00 | 777 | 0 | 51,852 | Nov 04 |
| MKSI | Burke Kathleen Flaherty | EVP, GC & Secretary | Feb 18 '25 | Option Exercise | 0.00 | 11,646 | 0 | 54,892 | Feb 19 |
| MKSI | Burke Kathleen Flaherty | EVP, GC & Secretary | Mar 01 '24 | Sale | 122.89 | 7,411 | 910,738 | 42,999 | Mar 04 |
| MKSI | Burke Kathleen Flaherty | EVP, GC & Secretary | Feb 15 '24 | Option Exercise | 0.00 | 12,459 | 0 | 55,322 | Feb 16 |
| MKSI | Burke Kathleen Flaherty | EVP, GC & Secretary | Aug 07 '23 | Sale | 101.23 | 11,563 | 1,170,543 | 42,738 | Aug 08 |