MKS INSTRS INC

Ticker: MKSI CUSIP: 55306N104 Class: EQTY

CSS LLC/IL's Holding History (CIK: 0001103646)

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

Q3 2017

Shares 6,000 Value ($000) $567 Avg Close $76.52 Range $62.45 - $89.48

Q2 2017

Shares 4,500 Value ($000) $303 Avg Close $70.74 Range $60.40 - $82.65

Q1 2017

Shares 4,500 Value ($000) $309 Avg Close $61.31 Range $54.85 - $65.67

Q4 2016

Shares 4,500 Value ($000) $267 Avg Close $50.13 Range $43.15 - $57.04

Q3 2016

Shares 4,500 Value ($000) $224 Avg Close $43.66 Range $38.22 - $50.60

Period	Shares	Value ($000)	Average Close	Price Range
Q3 2017	6,000	$567	$76.52	$62.45 - $89.48
Q2 2017	4,500	$303	$70.74	$60.40 - $82.65
Q1 2017	4,500	$309	$61.31	$54.85 - $65.67
Q4 2016	4,500	$267	$50.13	$43.15 - $57.04
Q3 2016	4,500	$224	$43.66	$38.22 - $50.60