MKS INSTRS INC

Ticker: MKSI CUSIP: 55306N104 Class: EQTY

PEREGRINE CAPITAL MANAGEMENT LLC's Holding History (CIK: 0000764529)

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

Q2 2017

Shares 155,619 Value ($000) $10,473 Avg Close $70.74 Range $60.40 - $82.65

Q1 2017

Shares 152,499 Value ($000) $10,416 Avg Close $61.31 Range $54.85 - $65.67

Q4 2016

Shares 154,931 Value ($000) $9,203 Avg Close $50.13 Range $43.15 - $57.04

Period	Shares	Value ($000)	Average Close	Price Range
Q2 2017	155,619	$10,473	$70.74	$60.40 - $82.65
Q1 2017	152,499	$10,416	$61.31	$54.85 - $65.67
Q4 2016	154,931	$9,203	$50.13	$43.15 - $57.04