MKS INSTRS INC

Ticker: MKSI CUSIP: 55306N104 Class: EQTY

EMERALD ADVISERS, LLC's Holding History (CIK: 0001015083)

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

Q2 2019

Shares 6,508 Value ($000) $507 Avg Close $80.27 Range $67.03 - $98.53

Q1 2019

Shares 9,445 Value ($000) $879 Avg Close $76.40 Range $59.36 - $88.91

Q4 2018

Shares 6,649 Value ($000) $430 Avg Close $68.31 Range $53.35 - $77.61

Q3 2018

Shares 7,627 Value ($000) $611 Avg Close $86.11 Range $74.38 - $97.19

Q2 2018

Shares 4,094 Value ($000) $392 Avg Close $102.60 Range $86.55 - $115.42

Q1 2018

Shares 126,280 Value ($000) $14,604 Avg Close $103.13 Range $88.32 - $120.60

Q4 2017

Shares 49,980 Value ($000) $4,723 Avg Close $93.43 Range $82.69 - $103.63

Period	Shares	Value ($000)	Average Close	Price Range
Q2 2019	6,508	$507	$80.27	$67.03 - $98.53
Q1 2019	9,445	$879	$76.40	$59.36 - $88.91
Q4 2018	6,649	$430	$68.31	$53.35 - $77.61
Q3 2018	7,627	$611	$86.11	$74.38 - $97.19
Q2 2018	4,094	$392	$102.60	$86.55 - $115.42
Q1 2018	126,280	$14,604	$103.13	$88.32 - $120.60
Q4 2017	49,980	$4,723	$93.43	$82.69 - $103.63