MKS INSTRS INC

Ticker: MKSI CUSIP: 55306N104 Class: EQTY

BANK OF MONTREAL /CAN/'s Holding History (CIK: 0000927971)

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

Q4 2025

Shares 164,794 Value ($000) $26,334 Avg Close $148.21 Range $120.73 - $170.37

Q3 2025

Shares 108,245 Value ($000) $13,397 Avg Close $106.31 Range $88.17 - $132.24

Q2 2025

Shares 250,358 Value ($000) $24,876 Avg Close $80.86 Range $54.50 - $100.44

Q1 2025

Shares 233,670 Value ($000) $18,729 Avg Close $100.21 Range $75.89 - $124.28

Q4 2024

Shares 179,800 Value ($000) $18,769 Avg Close $106.91 Range $96.54 - $118.37

Q3 2024

Shares 10,417 Value ($000) $1,149 Avg Close $117.45 Range $99.10 - $145.63

Q2 2024

Shares 7,568 Value ($000) $1,035 Avg Close $124.55 Range $105.72 - $137.52

Q1 2024

Shares 7,288 Value ($000) $969 Avg Close $114.51 Range $94.23 - $132.85

Q4 2023

Shares 59,303 Value ($000) $6,237 Avg Close $79.84 Range $62.28 - $104.49

Q3 2023

Shares 9,798 Value ($000) $900 Avg Close $95.58 Range $81.25 - $107.67

Q2 2023

Shares 8,623 Value ($000) $935 Avg Close $89.53 Range $77.81 - $108.20

Q1 2023

Shares 10,318 Value ($000) $917 Avg Close $93.12 Range $80.00 - $111.27

Q4 2022

Shares 10,664 Value ($000) $908 Avg Close $78.00 Range $62.97 - $89.22

Q3 2022

Shares 8,251 Value ($000) $703 Avg Close $100.01 Range $79.23 - $120.27

Q2 2022

Shares 7,893 Value ($000) $891 Avg Close $112.92 Range $94.75 - $148.07

Q1 2022

Shares 6,953 Value ($000) $1,091 Avg Close $150.35 Range $131.30 - $175.09

Q4 2021

Shares 61,377 Value ($000) $10,952 Avg Close $151.09 Range $136.06 - $172.80

Q3 2021

Shares 84,532 Value ($000) $12,761 Avg Close $148.13 Range $133.76 - $168.78

Q2 2021

Shares 20,213 Value ($000) $3,608 Avg Close $175.09 Range $158.98 - $192.11

Q1 2021

Shares 17,524 Value ($000) $3,419 Avg Close $161.78 Range $138.78 - $185.00

Q4 2020

Shares 18,676 Value ($000) $3,150 Avg Close $125.75 Range $101.82 - $152.08

Q3 2020

Shares 5,285 Value ($000) $588 Avg Close $112.47 Range $97.77 - $124.64

Q2 2020

Shares 5,029 Value ($000) $576 Avg Close $95.31 Range $70.45 - $112.06

Q1 2020

Shares 2,914 Value ($000) $226 Avg Close $97.84 Range $64.00 - $116.86

Q4 2019

Shares 6,959 Value ($000) $766 Avg Close $99.99 Range $81.07 - $109.78

Q3 2019

Shares 2,674 Value ($000) $247 Avg Close $78.64 Range $68.69 - $91.29

Q2 2019

Shares 8,657 Value ($000) $674 Avg Close $80.27 Range $67.03 - $98.53

Q1 2019

Shares 107,965 Value ($000) $10,045 Avg Close $76.40 Range $59.36 - $88.91

Q4 2018

Shares 81,245 Value ($000) $5,248 Avg Close $68.31 Range $53.35 - $77.61

Q3 2018

Shares 62,616 Value ($000) $5,019 Avg Close $86.11 Range $74.38 - $97.19

Q2 2018

Shares 62,919 Value ($000) $6,021 Avg Close $102.60 Range $86.55 - $115.42

Q1 2018

Shares 73,878 Value ($000) $8,545 Avg Close $103.13 Range $88.32 - $120.60

Q4 2017

Shares 54,627 Value ($000) $5,162 Avg Close $93.43 Range $82.69 - $103.63

Q3 2017

Shares 5,362 Value ($000) $506 Avg Close $76.52 Range $62.45 - $89.48

Q2 2017

Shares 3,450 Value ($000) $232 Avg Close $70.74 Range $60.40 - $82.65

Q1 2017

Shares 4,527 Value ($000) $311 Avg Close $61.31 Range $54.85 - $65.67

Q4 2016

Shares 3,958 Value ($000) $228 Avg Close $50.13 Range $43.15 - $57.04

Q3 2016

Shares 4,768 Value ($000) $237 Avg Close $43.66 Range $38.22 - $50.60

Q2 2016

Shares 3,878 Value ($000) $167 Avg Close $35.80 Range $32.24 - $39.81

Q1 2016

Shares 4,470 Value ($000) $168 Avg Close $31.35 Range $28.08 - $35.11

Q4 2015

Shares 3,475 Value ($000) $125 Avg Close $32.52 Range $26.43 - $35.02

Q3 2015

Shares 2,163 Value ($000) $72 Avg Close $31.60 Range $28.82 - $34.92

Q2 2015

Shares 2,781 Value ($000) $105 Avg Close $32.93 Range $29.54 - $35.95

Q1 2015

Shares 10,781 Value ($000) $364 Avg Close $31.63 Range $29.59 - $33.22

Q4 2014

Shares 10,425 Value ($000) $382 Avg Close $31.69 Range $27.30 - $33.99

Q3 2014

Shares 10,500 Value ($000) $350 Avg Close $29.19 Range $27.47 - $31.20

Q2 2014

Shares 9,960 Value ($000) $311 Avg Close $25.69 Range $23.72 - $27.88

Q1 2014

Shares 8,747 Value ($000) $261 Avg Close $26.46 Range $25.10 - $28.61

Q4 2013

Shares 9,893 Value ($000) $296 Avg Close $25.51 Range $23.10 - $27.14

Q3 2013

Shares 7,418 Value ($000) $197 Avg Close $23.28 Range $21.63 - $25.20

Q2 2013

Shares 7,043 Value ($000) $187 Avg Close $23.45 Range $21.31 - $25.25

Period	Shares	Value ($000)	Average Close	Price Range
Q4 2025	164,794	$26,334	$148.21	$120.73 - $170.37
Q3 2025	108,245	$13,397	$106.31	$88.17 - $132.24
Q2 2025	250,358	$24,876	$80.86	$54.50 - $100.44
Q1 2025	233,670	$18,729	$100.21	$75.89 - $124.28
Q4 2024	179,800	$18,769	$106.91	$96.54 - $118.37
Q3 2024	10,417	$1,149	$117.45	$99.10 - $145.63
Q2 2024	7,568	$1,035	$124.55	$105.72 - $137.52
Q1 2024	7,288	$969	$114.51	$94.23 - $132.85
Q4 2023	59,303	$6,237	$79.84	$62.28 - $104.49
Q3 2023	9,798	$900	$95.58	$81.25 - $107.67
Q2 2023	8,623	$935	$89.53	$77.81 - $108.20
Q1 2023	10,318	$917	$93.12	$80.00 - $111.27
Q4 2022	10,664	$908	$78.00	$62.97 - $89.22
Q3 2022	8,251	$703	$100.01	$79.23 - $120.27
Q2 2022	7,893	$891	$112.92	$94.75 - $148.07
Q1 2022	6,953	$1,091	$150.35	$131.30 - $175.09
Q4 2021	61,377	$10,952	$151.09	$136.06 - $172.80
Q3 2021	84,532	$12,761	$148.13	$133.76 - $168.78
Q2 2021	20,213	$3,608	$175.09	$158.98 - $192.11
Q1 2021	17,524	$3,419	$161.78	$138.78 - $185.00
Q4 2020	18,676	$3,150	$125.75	$101.82 - $152.08
Q3 2020	5,285	$588	$112.47	$97.77 - $124.64
Q2 2020	5,029	$576	$95.31	$70.45 - $112.06
Q1 2020	2,914	$226	$97.84	$64.00 - $116.86
Q4 2019	6,959	$766	$99.99	$81.07 - $109.78
Q3 2019	2,674	$247	$78.64	$68.69 - $91.29
Q2 2019	8,657	$674	$80.27	$67.03 - $98.53
Q1 2019	107,965	$10,045	$76.40	$59.36 - $88.91
Q4 2018	81,245	$5,248	$68.31	$53.35 - $77.61
Q3 2018	62,616	$5,019	$86.11	$74.38 - $97.19
Q2 2018	62,919	$6,021	$102.60	$86.55 - $115.42
Q1 2018	73,878	$8,545	$103.13	$88.32 - $120.60
Q4 2017	54,627	$5,162	$93.43	$82.69 - $103.63
Q3 2017	5,362	$506	$76.52	$62.45 - $89.48
Q2 2017	3,450	$232	$70.74	$60.40 - $82.65
Q1 2017	4,527	$311	$61.31	$54.85 - $65.67
Q4 2016	3,958	$228	$50.13	$43.15 - $57.04
Q3 2016	4,768	$237	$43.66	$38.22 - $50.60
Q2 2016	3,878	$167	$35.80	$32.24 - $39.81
Q1 2016	4,470	$168	$31.35	$28.08 - $35.11
Q4 2015	3,475	$125	$32.52	$26.43 - $35.02
Q3 2015	2,163	$72	$31.60	$28.82 - $34.92
Q2 2015	2,781	$105	$32.93	$29.54 - $35.95
Q1 2015	10,781	$364	$31.63	$29.59 - $33.22
Q4 2014	10,425	$382	$31.69	$27.30 - $33.99
Q3 2014	10,500	$350	$29.19	$27.47 - $31.20
Q2 2014	9,960	$311	$25.69	$23.72 - $27.88
Q1 2014	8,747	$261	$26.46	$25.10 - $28.61
Q4 2013	9,893	$296	$25.51	$23.10 - $27.14
Q3 2013	7,418	$197	$23.28	$21.63 - $25.20
Q2 2013	7,043	$187	$23.45	$21.31 - $25.25