MKS INSTRS INC

Ticker: MKSI CUSIP: 55306N104 Class: EQTY

DEAN INVESTMENT ASSOCIATES, LLC's Holding History (CIK: 0000846797)

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

Q4 2025

Shares 23,480 Value ($000) $3,752 Avg Close $148.21 Range $120.73 - $170.37

Q3 2025

Shares 22,873 Value ($000) $2,831 Avg Close $106.31 Range $88.17 - $132.24

Q2 2025

Shares 12,722 Value ($000) $1,264 Avg Close $80.86 Range $54.50 - $100.44

Q2 2021

Shares 7,761 Value ($000) $1,381 Avg Close $175.09 Range $158.98 - $192.11

Q1 2021

Shares 7,832 Value ($000) $1,452 Avg Close $161.78 Range $138.78 - $185.00

Period	Shares	Value ($000)	Average Close	Price Range
Q4 2025	23,480	$3,752	$148.21	$120.73 - $170.37
Q3 2025	22,873	$2,831	$106.31	$88.17 - $132.24
Q2 2025	12,722	$1,264	$80.86	$54.50 - $100.44
Q2 2021	7,761	$1,381	$175.09	$158.98 - $192.11
Q1 2021	7,832	$1,452	$161.78	$138.78 - $185.00