Burke Kathleen Flaherty (CIK 1775435) reported 22 SEC Form 4 insider transactions across 1 companies over the past 18 months (most recent 2026-05-12). Recent activity: Sell MKSI (4,355 shares), Sell MKSI (4,254 shares), Buy MKSI (3,451 shares), Buy MKSI (1,788 shares), Buy MKSI (563 shares). Source: SEC Form 4.
| Date | Company | Role | Type | Shares | Value |
|---|---|---|---|---|---|
| 2026-05-12 | MKS INC (MKSI) | EVP, GC & Secretary | Sell | 4,355 | $1.4M |
| 2026-02-23 | MKS INC (MKSI) | EVP, GC & Secretary | Sell | 4,254 | $1.1M |
| 2026-02-18 | MKS INC (MKSI) | EVP, GC & Secretary | Buy | 3,451 | $0 |
| 2026-02-18 | MKS INC (MKSI) | EVP, GC & Secretary | Buy | 1,788 | $0 |
| 2026-02-18 | MKS INC (MKSI) | EVP, GC & Secretary | Buy | 563 | $0 |
| 2026-02-18 | MKS INC (MKSI) | EVP, GC & Secretary | Buy | 1,576 | $0 |
| 2026-02-18 | MKS INC (MKSI) | EVP, GC & Secretary | Buy | 2,336 | $0 |
| 2026-02-18 | MKS INC (MKSI) | EVP, GC & Secretary | Buy | 2,493 | $0 |
| 2026-02-18 | MKS INC (MKSI) | EVP, GC & Secretary | Sell | 5,318 | $1.4M |
| 2025-11-04 | MKS INC (MKSI) | EVP, GC & Secretary | Buy | 144 | $0 |
| 2025-11-04 | MKS INC (MKSI) | EVP, GC & Secretary | Buy | 158 | $0 |
| 2025-11-04 | MKS INC (MKSI) | EVP, GC & Secretary | Buy | 52 | $0 |
| 2025-11-04 | MKS INC (MKSI) | EVP, GC & Secretary | Buy | 82 | $0 |
| 2025-11-04 | MKS INC (MKSI) | EVP, GC & Secretary | Buy | 341 | $0 |
| 2025-11-04 | MKS INC (MKSI) | EVP, GC & Secretary | Sell | 777 | $111,663 |
| 2025-02-19 | MKS INSTRUMENTS INC (MKSI) | EVP, GC & Secretary | Sell | 3,970 | $411,570 |
| 2025-02-19 | MKS INSTRUMENTS INC (MKSI) | EVP, GC & Secretary | Buy | 2,287 | $0 |
| 2025-02-19 | MKS INSTRUMENTS INC (MKSI) | EVP, GC & Secretary | Buy | 1,645 | $0 |
| 2025-02-19 | MKS INSTRUMENTS INC (MKSI) | EVP, GC & Secretary | Buy | 3,608 | $0 |
| 2025-02-19 | MKS INSTRUMENTS INC (MKSI) | EVP, GC & Secretary | Buy | 1,870 | $0 |
| 2025-02-19 | MKS INSTRUMENTS INC (MKSI) | EVP, GC & Secretary | Buy | 588 | $0 |
| 2025-02-19 | MKS INSTRUMENTS INC (MKSI) | EVP, GC & Secretary | Buy | 1,648 | $0 |
Source: SEC Form 4 filings · as of 2026-05-12