| Accession Number: | 0001127602-14-023924 |
| Date: | 2014-07-24 |
| Issuer: | MKS INSTRUMENTS INC (MKSI) |
| Original Submission Date: |
BAGSHAW SETH H
C/O MKS 2 TECH DRIVE, SUITE 201
ANDOVER, MA 01810
| Title of Security | Transaction Date | 2a. Deemed Execution Date | Transaction Code | Shares | Acquired or Disposed | Price per share | 5. Amount of Securities Beneficially Owned Following Reported Transaction | 6. Ownership Form Direct or Indirect | Nature of Indirect Ownership |
|---|---|---|---|---|---|---|---|---|---|
| COMMON STOCK | 2014-07-24 | S | 5,000 | d | $32.62 | 31,801 | direct |
| Title of Derivative Security | Conversion or Exercise Price of Derivative Security | Transaction Date | Deemed Execution Date | Transaction Code | Number of Derivative Securities Acquired (A) or Disposed of (D) | Date Exercisable | Expiration Date | Title and Amount of Securities Underlying Derivative Security | Price of Derivative Security | Number of derivative Securities Beneficially Owned Following Reported Transaction(s) | Ownership Form: Direct (D) or Indirect (I) | Nature of Indirect Beneficial Ownership |
|---|
| ID | footnote |
|---|---|
| f1 | this transaction was effected pursuant to a rule 10b5-1 trading plan previously adopted by the reporting person. |
| f2 | this transaction was executed in multiple trades at prices ranging from $32.58 to $32.74. the price reported above reflects the weighted average sale price. the reporting person hereby undertakes to provide, upon request, the full information regarding the number of shares and prices at which the transaction was effected. |
