Joseph B. Donahue

Joseph B. Donahue: Director at MKS. What Joseph B. Donahue 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)

Joseph B. Donahue holds 10,033 MKS shares (0.01% of the company), worth about $2.6M at the last price, according to the Form 4 of May 27, 2026.

• Shares held: 10,033 (0.01%), $2.6M — Held in their own name.

Declarations

• MKS (MKSI) — Form 4 of May 27, 2026: open-market sale of 2,100 at $327.95; 10,033 shares after 0001049502-26-000096
• MKS (MKSI) — Form 4 of May 11, 2026: grant or award of 782; 12,133 shares after 0001049502-26-000070
• MKS (MKSI) — Form 4 of May 12, 2025: grant or award of 2,479; 11,351 shares after 0001127602-25-014095

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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