STEWART WILLIAM D 4/A
4/A · MKS INSTRUMENTS INC · Filed Mar 1, 2012
Insider Transaction Report
Form 4/AAmended
STEWART WILLIAM D
V.P. Vacuum Products & PFMC
Transactions
- Other
Restricted Stock Unit
2011-02-17−200→ 13,408 total→ Common Stock (200 underlying)
Footnotes (4)
- [F1]Amendment being filed to report additional shares forfeited, but not reported on original filing.
- [F2]Each restricted stock unit represents the contingent right to receive one share of common stock of MKS Instruments, Inc.
- [F3]This transaction reflects the forfeiture of RSUs due to performance criteria.
- [F4]These RSUs are subject to the achievement of performance criteria determined in the first year of the grant and thereafter vests in equal annual installments over three years.