MKS INSTRS INC

Ticker: MKSI CUSIP: 55306N104 Class: EQTY

&PARTNERS's Holding History (CIK: 0000107136)

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

Q4 2025

Shares 11,860 Value ($000) $1,895 Avg Close $148.21 Range $120.73 - $170.37

Q3 2025

Shares 11,139 Value ($000) $1,379 Avg Close $106.31 Range $88.17 - $132.24

Q2 2025

Shares 12,552 Value ($000) $1,248 Avg Close $80.86 Range $54.50 - $100.44

Q1 2025

Shares 12,490 Value ($000) $1,020 Avg Close $100.21 Range $75.89 - $124.28

Q4 2024

Shares 10,234 Value ($000) $1,109 Avg Close $106.91 Range $96.54 - $118.37

Q3 2024

Shares 6,529 Value ($000) $710 Avg Close $117.45 Range $99.10 - $145.63

Q2 2024

Shares 2,732 Value ($000) $358 Avg Close $124.55 Range $105.72 - $137.52

Period	Shares	Value ($000)	Average Close	Price Range
Q4 2025	11,860	$1,895	$148.21	$120.73 - $170.37
Q3 2025	11,139	$1,379	$106.31	$88.17 - $132.24
Q2 2025	12,552	$1,248	$80.86	$54.50 - $100.44
Q1 2025	12,490	$1,020	$100.21	$75.89 - $124.28
Q4 2024	10,234	$1,109	$106.91	$96.54 - $118.37
Q3 2024	6,529	$710	$117.45	$99.10 - $145.63
Q2 2024	2,732	$358	$124.55	$105.72 - $137.52