MKS INSTRS INC

Ticker: MKSI CUSIP: 55306N104 Class: EQTY

BlackRock, Inc.'s Holding History (CIK: 0002012383)

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

Q4 2025

Shares 6,138,839 Value ($000) $980,986 Avg Close $148.21 Range $120.73 - $170.37

Q3 2025

Shares 6,123,329 Value ($000) $757,884 Avg Close $106.31 Range $88.17 - $132.24

Q2 2025

Shares 7,316,563 Value ($000) $726,974 Avg Close $80.86 Range $54.50 - $100.44

Q1 2025

Shares 7,066,707 Value ($000) $566,397 Avg Close $100.21 Range $75.89 - $124.28

Q4 2024

Shares 7,119,883 Value ($000) $743,245 Avg Close $106.91 Range $96.54 - $118.37

Q3 2024

Shares 6,853,059 Value ($000) $744,996 Avg Close $117.45 Range $99.10 - $145.63

Period	Shares	Value ($000)	Average Close	Price Range
Q4 2025	6,138,839	$980,986	$148.21	$120.73 - $170.37
Q3 2025	6,123,329	$757,884	$106.31	$88.17 - $132.24
Q2 2025	7,316,563	$726,974	$80.86	$54.50 - $100.44
Q1 2025	7,066,707	$566,397	$100.21	$75.89 - $124.28
Q4 2024	7,119,883	$743,245	$106.91	$96.54 - $118.37
Q3 2024	6,853,059	$744,996	$117.45	$99.10 - $145.63