MKS INSTRS INC

Ticker: MKSI CUSIP: 55306N104 Class: EQTY

D.A. DAVIDSON & CO.'s Holding History (CIK: 0001080107)

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

Q4 2016

Shares 1,445 Value ($000) $85 Avg Close $50.13 Range $43.15 - $57.04

Q3 2016

Shares 2,887 Value ($000) $143 Avg Close $43.66 Range $38.22 - $50.60

Q2 2016

Shares 3,743 Value ($000) $161 Avg Close $35.80 Range $32.24 - $39.81

Q1 2016

Shares 4,383 Value ($000) $165 Avg Close $31.35 Range $28.08 - $35.11

Period	Shares	Value ($000)	Average Close	Price Range
Q4 2016	1,445	$85	$50.13	$43.15 - $57.04
Q3 2016	2,887	$143	$43.66	$38.22 - $50.60
Q2 2016	3,743	$161	$35.80	$32.24 - $39.81
Q1 2016	4,383	$165	$31.35	$28.08 - $35.11