MKS INSTRS INC

Ticker: MKSI CUSIP: 55306N104 Class: EQTY

ACADIAN ASSET MANAGEMENT LLC's Holding History (CIK: 0000916542)

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

Q4 2025

Shares 555 Value ($000) $0 Avg Close $148.21 Range $120.73 - $170.37

Q4 2020

Shares 231 Value ($000) $35 Avg Close $125.75 Range $101.82 - $152.08

Q1 2019

Shares 6,487 Value ($000) $604 Avg Close $76.40 Range $59.36 - $88.91

Q3 2018

Shares 606 Value ($000) $49 Avg Close $86.11 Range $74.38 - $97.19

Q1 2018

Shares 1,253 Value ($000) $145 Avg Close $103.13 Range $88.32 - $120.60

Q3 2017

Shares 6,246 Value ($000) $590 Avg Close $76.52 Range $62.45 - $89.48

Period	Shares	Value ($000)	Average Close	Price Range
Q4 2025	555	$0	$148.21	$120.73 - $170.37
Q4 2020	231	$35	$125.75	$101.82 - $152.08
Q1 2019	6,487	$604	$76.40	$59.36 - $88.91
Q3 2018	606	$49	$86.11	$74.38 - $97.19
Q1 2018	1,253	$145	$103.13	$88.32 - $120.60
Q3 2017	6,246	$590	$76.52	$62.45 - $89.48