MKS INSTRS INC

Ticker: MKSI CUSIP: 55306N104 Class: EQTY

North Star Investment Management Corp.'s Holding History (CIK: 0001342857)

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

Q4 2025

Shares 17 Value ($000) $3 Avg Close $148.21 Range $120.73 - $170.37

Q2 2018

Shares 101 Value ($000) $10 Avg Close $102.60 Range $86.55 - $115.42

Q1 2018

Shares 101 Value ($000) $12 Avg Close $103.13 Range $88.32 - $120.60

Q4 2017

Shares 100 Value ($000) $9 Avg Close $93.43 Range $82.69 - $103.63

Q3 2017

Shares 100 Value ($000) $9 Avg Close $76.52 Range $62.45 - $89.48

Period	Shares	Value ($000)	Average Close	Price Range
Q4 2025	17	$3	$148.21	$120.73 - $170.37
Q2 2018	101	$10	$102.60	$86.55 - $115.42
Q1 2018	101	$12	$103.13	$88.32 - $120.60
Q4 2017	100	$9	$93.43	$82.69 - $103.63
Q3 2017	100	$9	$76.52	$62.45 - $89.48