Kathleen Flaherty Burke
Kathleen Flaherty Burke: EVP, GC & Secretary at MKS. What Kathleen Flaherty Burke holds in an AI or semiconductor company tracked on Silicon Floor, from their SEC filings, broken down: the shares held and how, then any restricted shares, options or other rights declared.
MKS (MKSI)
Kathleen Flaherty Burke holds 49,439 MKS shares (0.07% of the company), worth about $12.6M at the last price, according to the Form 4 of May 11, 2026.
- Shares held: 49,439 (0.07%), $12.6M — Held in their own name.
- Share units: 15,129 (0.02%), $3.9M — MKS promised them as pay: each unit becomes a share when it vests, if its conditions are met. No vote until then.
Declarations
- MKS (MKSI) — Form 4 of May 11, 2026 (EVP, GC & Secretary): open-market sale of 4,355 at $319.94; 49,439 shares after 0001049502-26-000072
- MKS (MKSI) — Form 4 of Feb 20, 2026 (EVP, GC & Secretary): open-market sale of 4,254 at $250.00; 53,794 shares after 0001049502-26-000032
- MKS (MKSI) — Form 4 of Feb 17, 2026 (EVP, GC & Secretary): option exercise or conversion of 3,451; option exercise or conversion of 1,788; 58,048 shares after 0001049502-26-000018
- MKS (MKSI) — Form 4 of Feb 8, 2026 (EVP, GC & Secretary) 0001049502-26-000006
- MKS (MKSI) — Form 4 of Oct 31, 2025 (EVP, GC & Secretary): option exercise or conversion of 158; option exercise or conversion of 52; 51,075 shares after 0001049502-25-000037
- MKS (MKSI) — Form 4 of Feb 18, 2025 (EVP, GC & Secretary): option exercise or conversion of 2,287; option exercise or conversion of 1,645; 50,922 shares after 0001127602-25-005633
- MKS (MKSI) — Form 4 of Feb 10, 2025 (EVP, GC & Secretary) 0001127602-25-004215
Sources: SEC Schedules 13D and 13G (stakes above 5%, which count everything a person votes or can acquire within 60 days) and Forms 3, 4 and 5 (the shares a director, officer or 10% owner holds, filed within two business days of each trade). Values at the last price.
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