MKS INSTRS INC

Ticker: MKSI CUSIP: 55306N104 Class: EQTY

CLARK ESTATES INC/NY's Holding History (CIK: 0001056466)

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

Q1 2019

Shares 42,300 Value ($000) $3,936 Avg Close $76.40 Range $59.36 - $88.91

Q4 2018

Shares 39,300 Value ($000) $2,539 Avg Close $68.31 Range $53.35 - $77.61

Q3 2018

Shares 39,300 Value ($000) $3,150 Avg Close $86.11 Range $74.38 - $97.19

Q1 2016

Shares 85,200 Value ($000) $3,208 Avg Close $31.35 Range $28.08 - $35.11

Q4 2015

Shares 83,000 Value ($000) $2,988 Avg Close $32.52 Range $26.43 - $35.02

Period	Shares	Value ($000)	Average Close	Price Range
Q1 2019	42,300	$3,936	$76.40	$59.36 - $88.91
Q4 2018	39,300	$2,539	$68.31	$53.35 - $77.61
Q3 2018	39,300	$3,150	$86.11	$74.38 - $97.19
Q1 2016	85,200	$3,208	$31.35	$28.08 - $35.11
Q4 2015	83,000	$2,988	$32.52	$26.43 - $35.02