MKS INSTRS INC

Ticker: MKSI CUSIP: 55306N104 Class: EQTY

VIRGINIA RETIREMENT SYSTEMS ET AL's Holding History (CIK: 0001005354)

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

Q4 2025

Shares 15,100 Value ($000) $2,413 Avg Close $148.21 Range $120.73 - $170.37

Q3 2025

Shares 9,600 Value ($000) $1,188 Avg Close $106.31 Range $88.17 - $132.24

Q2 2025

Shares 5,300 Value ($000) $527 Avg Close $80.86 Range $54.50 - $100.44

Q1 2025

Shares 9,000 Value ($000) $721 Avg Close $100.21 Range $75.89 - $124.28

Q3 2022

Shares 19,800 Value ($000) $1,636 Avg Close $100.01 Range $79.23 - $120.27

Q1 2022

Shares 14,000 Value ($000) $2,100 Avg Close $150.35 Range $131.30 - $175.09

Q4 2021

Shares 15,900 Value ($000) $2,769 Avg Close $151.09 Range $136.06 - $172.80

Q3 2021

Shares 18,800 Value ($000) $2,837 Avg Close $148.13 Range $133.76 - $168.78

Q2 2021

Shares 10,200 Value ($000) $1,815 Avg Close $175.09 Range $158.98 - $192.11

Q1 2021

Shares 9,100 Value ($000) $1,687 Avg Close $161.78 Range $138.78 - $185.00

Q4 2020

Shares 8,400 Value ($000) $1,264 Avg Close $125.75 Range $101.82 - $152.08

Q3 2020

Shares 5,300 Value ($000) $579 Avg Close $112.47 Range $97.77 - $124.64

Q2 2020

Shares 5,100 Value ($000) $578 Avg Close $95.31 Range $70.45 - $112.06

Q1 2020

Shares 12,300 Value ($000) $1,002 Avg Close $97.84 Range $64.00 - $116.86

Q4 2019

Shares 14,900 Value ($000) $1,639 Avg Close $99.99 Range $81.07 - $109.78

Q3 2019

Shares 14,900 Value ($000) $1,375 Avg Close $78.64 Range $68.69 - $91.29

Q1 2019

Shares 12,800 Value ($000) $1,191 Avg Close $76.40 Range $59.36 - $88.91

Q3 2018

Shares 26,100 Value ($000) $2,092 Avg Close $86.11 Range $74.38 - $97.19

Q2 2018

Shares 16,900 Value ($000) $1,617 Avg Close $102.60 Range $86.55 - $115.42

Q1 2018

Shares 16,900 Value ($000) $1,954 Avg Close $103.13 Range $88.32 - $120.60

Q4 2017

Shares 22,400 Value ($000) $2,117 Avg Close $93.43 Range $82.69 - $103.63

Q3 2017

Shares 19,800 Value ($000) $1,870 Avg Close $76.52 Range $62.45 - $89.48

Q2 2017

Shares 25,700 Value ($000) $1,730 Avg Close $70.74 Range $60.40 - $82.65

Q1 2017

Shares 25,200 Value ($000) $1,733 Avg Close $61.31 Range $54.85 - $65.67

Q4 2016

Shares 6,400 Value ($000) $380 Avg Close $50.13 Range $43.15 - $57.04

Q2 2016

Shares 9,500 Value ($000) $409 Avg Close $35.80 Range $32.24 - $39.81

Period	Shares	Value ($000)	Average Close	Price Range
Q4 2025	15,100	$2,413	$148.21	$120.73 - $170.37
Q3 2025	9,600	$1,188	$106.31	$88.17 - $132.24
Q2 2025	5,300	$527	$80.86	$54.50 - $100.44
Q1 2025	9,000	$721	$100.21	$75.89 - $124.28
Q3 2022	19,800	$1,636	$100.01	$79.23 - $120.27
Q1 2022	14,000	$2,100	$150.35	$131.30 - $175.09
Q4 2021	15,900	$2,769	$151.09	$136.06 - $172.80
Q3 2021	18,800	$2,837	$148.13	$133.76 - $168.78
Q2 2021	10,200	$1,815	$175.09	$158.98 - $192.11
Q1 2021	9,100	$1,687	$161.78	$138.78 - $185.00
Q4 2020	8,400	$1,264	$125.75	$101.82 - $152.08
Q3 2020	5,300	$579	$112.47	$97.77 - $124.64
Q2 2020	5,100	$578	$95.31	$70.45 - $112.06
Q1 2020	12,300	$1,002	$97.84	$64.00 - $116.86
Q4 2019	14,900	$1,639	$99.99	$81.07 - $109.78
Q3 2019	14,900	$1,375	$78.64	$68.69 - $91.29
Q1 2019	12,800	$1,191	$76.40	$59.36 - $88.91
Q3 2018	26,100	$2,092	$86.11	$74.38 - $97.19
Q2 2018	16,900	$1,617	$102.60	$86.55 - $115.42
Q1 2018	16,900	$1,954	$103.13	$88.32 - $120.60
Q4 2017	22,400	$2,117	$93.43	$82.69 - $103.63
Q3 2017	19,800	$1,870	$76.52	$62.45 - $89.48
Q2 2017	25,700	$1,730	$70.74	$60.40 - $82.65
Q1 2017	25,200	$1,733	$61.31	$54.85 - $65.67
Q4 2016	6,400	$380	$50.13	$43.15 - $57.04
Q2 2016	9,500	$409	$35.80	$32.24 - $39.81