Kathleen Flaherty Burke
CIK: 0001775435
Transaction Breakdown
High conviction signal
Position reduction
Derivative conversions
Compensation grants
Gifts, tax withholding, conversions, dispositions to the issuer and other codes
Companies & Roles (1)
MKS INC
Discretionary Trading P&L
Holdings
Transaction History (26 total)
- May 11, 2026MKSI
MKS INC
Sale(S)Direct4.4K shares at avg. $319.94$1.4M - Feb 20, 2026MKSI
MKS INC
Sale(S)Direct4.3K shares at avg. $250.00$1.1M - Feb 17, 2026MKSI
MKS INC
Tax Payment(F)Direct5.3K shares at avg. $260.74$1.4M - Feb 17, 2026MKSI
MKS INC
Exercise(M)Direct2.5K shares- - Feb 17, 2026MKSI
MKS INC
Exercise(M)Direct2.3K shares- - Feb 17, 2026MKSI
MKS INC
Exercise(M)Direct1.6K shares- - Feb 17, 2026MKSI
MKS INC
Exercise(M)Direct563 shares- - Feb 17, 2026MKSI
MKS INC
Exercise(M)Direct3.5K shares- - Feb 17, 2026MKSI
MKS INC
Exercise(M)Direct1.8K shares- - Feb 17, 2026MKSI
MKS INC
Award(A)DirectRestricted Stock Unit
3.3K shares- - Feb 8, 2026MKSI
MKS INC
Award(A)DirectRestricted Stock Unit
7K shares- - Oct 31, 2025MKSI
MKS INC
Exercise(M)Direct158 shares- - Oct 31, 2025MKSI
MKS INC
Tax Payment(F)Direct777 shares at avg. $143.71$112K - Oct 31, 2025MKSI
MKS INC
Exercise(M)Direct341 shares- - Oct 31, 2025MKSI
MKS INC
Exercise(M)Direct144 shares- - Oct 31, 2025MKSI
MKS INC
Exercise(M)Direct82 shares- - Oct 31, 2025MKSI
MKS INC
Exercise(M)Direct52 shares- - Feb 18, 2025MKSI
MKS INSTRUMENTS INC
Exercise(M)Direct1.6K shares- - Feb 18, 2025MKSI
MKS INSTRUMENTS INC
Exercise(M)Direct1.9K shares- - Feb 18, 2025MKSI
MKS INSTRUMENTS INC
Award(A)DirectRestricted Stock Unit
7.8K shares- - Feb 18, 2025MKSI
MKS INSTRUMENTS INC
Exercise(M)Direct2.3K shares- - Feb 18, 2025MKSI
MKS INSTRUMENTS INC
Exercise(M)Direct588 shares- - Feb 18, 2025MKSI
MKS INSTRUMENTS INC
Exercise(M)Direct1.6K shares- - Feb 18, 2025MKSI
MKS INSTRUMENTS INC
Tax Payment(F)Direct4K shares at avg. $103.67$412K - Feb 18, 2025MKSI
MKS INSTRUMENTS INC
Exercise(M)Direct3.6K shares-
| Type | Shares | Price | Ownership | |||
|---|---|---|---|---|---|---|
| May 11, 2026 | MKSI MKS INC | Sale(S) | 4,355 | $319.94 | $1,393,317 | Direct |
| Feb 20, 2026 | MKSI MKS INC | Sale(S) | 4,254 | $250.00 | $1,063,500 | Direct |
| Feb 17, 2026 | MKSI MKS INC | Tax Payment(F) | 5,318 | $260.74 | $1,386,563 | Direct |
| Feb 17, 2026 | MKSI MKS INC | Exercise(M) | 2,493 | - | $0 | Direct |
| Feb 17, 2026 | MKSI MKS INC | Exercise(M) | 2,336 | - | $0 | Direct |
| Feb 17, 2026 | MKSI MKS INC | Exercise(M) | 1,576 | - | $0 | Direct |
| Feb 17, 2026 | MKSI MKS INC | Exercise(M) | 563 | - | $0 | Direct |
| Feb 17, 2026 | MKSI MKS INC | Exercise(M) | 3,451 | - | $0 | Direct |
| Feb 17, 2026 | MKSI MKS INC | Exercise(M) | 1,788 | - | $0 | Direct |
| Feb 17, 2026 | MKSI MKS INC | Award(A) Restricted Stock Unit | 3,328 | - | - | Direct |
| Feb 8, 2026 | MKSI MKS INC | Award(A) Restricted Stock Unit | 7,009 | - | - | Direct |
| Oct 31, 2025 | MKSI MKS INC | Exercise(M) | 158 | - | - | Direct |
| Oct 31, 2025 | MKSI MKS INC | Tax Payment(F) | 777 | $143.71 | $111,663 | Direct |
| Oct 31, 2025 | MKSI MKS INC | Exercise(M) | 341 | - | - | Direct |
| Oct 31, 2025 | MKSI MKS INC | Exercise(M) | 144 | - | - | Direct |
| Oct 31, 2025 | MKSI MKS INC | Exercise(M) | 82 | - | - | Direct |
| Oct 31, 2025 | MKSI MKS INC | Exercise(M) | 52 | - | - | Direct |
| Feb 18, 2025 | MKSI MKS INSTRUMENTS INC | Exercise(M) | 1,645 | - | - | Direct |
| Feb 18, 2025 | MKSI MKS INSTRUMENTS INC | Exercise(M) | 1,870 | - | - | Direct |
| Feb 18, 2025 | MKSI MKS INSTRUMENTS INC | Award(A) Restricted Stock Unit | 7,822 | - | - | Direct |
| Feb 18, 2025 | MKSI MKS INSTRUMENTS INC | Exercise(M) | 2,287 | - | - | Direct |
| Feb 18, 2025 | MKSI MKS INSTRUMENTS INC | Exercise(M) | 588 | - | - | Direct |
| Feb 18, 2025 | MKSI MKS INSTRUMENTS INC | Exercise(M) | 1,648 | - | - | Direct |
| Feb 18, 2025 | MKSI MKS INSTRUMENTS INC | Tax Payment(F) | 3,970 | $103.67 | $411,570 | Direct |
| Feb 18, 2025 | MKSI MKS INSTRUMENTS INC | Exercise(M) | 3,608 | - | - | Direct |
1-25 of 26 transactions
About Burke Kathleen Flaherty
Burke Kathleen Flaherty (SEC CIK 0001775435) files insider reports with the SEC as EVP, GC & Secretary of MKS INC (MKSI).
Signal8 holds 7 ownership filings by Burke Kathleen Flaherty, all Form 4s, filed between Feb 11, 2025 and May 12, 2026. Those filings report 26 transactions, from Feb 10, 2025 to May 11, 2026. Signal8's Form 4 history starts in Sep 2024.
The business address on Burke Kathleen Flaherty's filings is in ANDOVER, MA.
Recent filings by Burke Kathleen Flaherty
- May 11, 2026: Open-market sale of MKSI shares (Form 4, code S).
- Feb 20, 2026: Open-market sale of MKSI shares (Form 4, code S).
- Feb 17, 2026: Tax withholding of MKSI shares (Form 4, code F).
- Feb 17, 2026: Option exercises of MKSI shares (6 lines, Form 4, code M).
- Feb 17, 2026: Grant or award of MKSI derivative securities (Form 4, code A).
Other insiders filing for MKS INC (MKSI)
- Lee John Tseng-Chung, President & CEO
- Mora Elizabeth, Director
- Donlan Renee Martel, EVP, GC & CCO
- Williams John Edward, EVP & GM, PSD
- Schreiner James Alan, EVP & COO
- McCarthy Michelle M, SVP & Chief Accounting Officer