MKS INC — Director's Dealing 2018

Feb 16, 2018

SEC Form 4 — Statement of Changes in Beneficial Ownership

Issuer: MKS INSTRUMENTS INC (MKSI)
CIK: 0001049502
Period of Report: 2018-02-15

Reporting Person: Abrams John R (Sr. VP, Global Sales & Service)

Non-Derivative Transactions

Date	Security	Code	Shares	Price	A/D	Holdings After	Ownership
2018-02-15	Common Stock	M	1745.043	—	Acquired	4128.111	Direct
2018-02-15	Common Stock	M	1419.319	—	Acquired	5547.43	Direct
2018-02-15	Common Stock	M	2608.635	—	Acquired	8156.065	Direct
2018-02-15	Common Stock	M	2007	—	Acquired	10163.065	Direct
2018-02-15	Common Stock	M	1787	—	Acquired	11950.065	Direct
2018-02-15	Common Stock	M	1477	—	Acquired	13427.065	Direct
2018-02-15	Common Stock	F	3595	$111.10	Disposed	9832.065	Direct

Derivative Transactions

Date	Security	Exercise Price	Code	Shares	A/D	Expiration	Underlying	Ownership
2018-02-15	Restricted Stock Unit	$	A	4725.473	Acquired		Common Stock (4725.473)	Direct
2018-02-15	Restricted Stock Unit	$	A	3150.315	Acquired		Common Stock (3150.315)	Direct
2018-02-15	Restricted Stock Unit	$	M	1745.043	Disposed		Common Stock (1745.043)	Direct
2018-02-15	Restricted Stock Unit	$	M	1419.319	Disposed		Common Stock (1419.319)	Direct
2018-02-15	Restricted Stock Unit	$	M	2608.635	Disposed		Common Stock (2608.635)	Direct
2018-02-15	Restricted Stock Unit	$	M	2007	Disposed		Common Stock (2007)	Direct
2018-02-15	Restricted Stock Unit	$	M	1787	Disposed		Common Stock (1787)	Direct
2018-02-15	Restricted Stock Unit	$	M	1477	Disposed		Common Stock (1477)	Direct

Footnotes

F1: Each restricted stock unit represents the contingent right to receive one share of common stock of MKS Instruments, Inc.

F2: This transaction was effected pursuant to a Rule 10b5-1 trading plan previously adopted by the reporting person.

F3: These RSUs are subject to the achievement of performance criteria determined in the first year of grant and thereafter vest in three equal annual installments beginning on February 15, 2019, provided that if, in any vesting year, February 15th is not a business day, such vesting shall occur on the next business day.

F4: These RSUs vest in three equal annual installments commencing on February 15, 2019, provided that if, in any vesting year, February 15th is not a business day, such vesting shall occur on the next business day.

F5: These RSUs are subject to the achievement of performance criteria determined in the first year of grant and thereafter vest in three equal annual installments beginning on February 15, 2016, provided that if, in any vesting year, February 15th is not a business day, such vesting shall occur on the next business day

F6: These RSUs vest in three equal annual installments commencing on February 15, 2016, provided that if, in any vesting year, February 15th is not a business day, such vesting shall occur on the next business day.

F7: These RSUs are subject to the achievement of performance criteria determined in the first year of grant and thereafter vest in three equal annual installments beginning on February 15, 2017, provided that if, in any vesting year, February 15th is not a business day, such vesting shall occur on the next business day.

F8: These RSUs vest in three equal annual installments commencing on February 15, 2017, provided that if, in any vesting year, February 15th is not a business day, such vesting shall occur on the next business day

F9: These RSUs are subject to the achievement of performance criteria determined in the first year of grant and thereafter vest in three equal annual installments beginning on February 15, 2018, provided that if, in any vesting year, February 15th is not a business day, such vesting shall occur on the next business day.

F10: These RSUs vest in three equal annual installments commencing on February 15, 2018, provided that if, in any vesting year, February 15th is not a business day, such vesting shall occur on the next business day.