MKS INSTRS INC

Ticker: MKSI CUSIP: 55306N104 Class: EQTY

BEACONLIGHT CAPITAL, LLC's Holding History (CIK: 0001569537)

Note: Option positions (PUT/CALL) are excluded.

Q2 2020

Shares 99,643 Value ($000) $11,284 Avg Close $95.31 Range $70.45 - $112.06

Q1 2020

Shares 75,888 Value ($000) $6,181 Avg Close $97.84 Range $64.00 - $116.86

Q4 2019

Shares 104,016 Value ($000) $11,443 Avg Close $99.99 Range $81.07 - $109.78

Q3 2019

Shares 61,230 Value ($000) $5,650 Avg Close $78.64 Range $68.69 - $91.29

Period	Shares	Value ($000)	Average Close	Price Range
Q2 2020	99,643	$11,284	$95.31	$70.45 - $112.06
Q1 2020	75,888	$6,181	$97.84	$64.00 - $116.86
Q4 2019	104,016	$11,443	$99.99	$81.07 - $109.78
Q3 2019	61,230	$5,650	$78.64	$68.69 - $91.29