MONOLITHIC PWR SYS INC

Ticker: MPWR CUSIP: 609839105 Class: COM

KEYBANK NATIONAL ASSOCIATION/OH's Holding History (CIK: 0001089877)

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

Q4 2025

Shares 1,771 Value ($000) $1,605 Avg Close $960.73 Range $831.77 - $1121.48

Q3 2025

Shares 1,749 Value ($000) $1,610 Avg Close $808.07 Range $684.50 - $934.81

Q2 2025

Shares 1,845 Value ($000) $1,349 Avg Close $633.58 Range $436.42 - $750.80

Q1 2025

Shares 1,718 Value ($000) $996 Avg Close $624.99 Range $550.94 - $718.03

Q4 2024

Shares 1,824 Value ($000) $1,079 Avg Close $716.72 Range $541.09 - $944.19

Q3 2024

Shares 1,802 Value ($000) $1,666 Avg Close $853.35 Range $721.11 - $948.49

Q2 2024

Shares 2,326 Value ($000) $1,911 Avg Close $712.18 Range $577.26 - $845.04

Q1 2024

Shares 2,590 Value ($000) $1,755 Avg Close $657.62 Range $552.66 - $766.48

Q4 2023

Shares 2,601 Value ($000) $1,641 Avg Close $513.84 Range $385.61 - $636.41

Q3 2023

Shares 2,338 Value ($000) $1,080 Avg Close $501.94 Range $430.22 - $584.79

Q2 2023

Shares 2,442 Value ($000) $1,319 Avg Close $465.29 Range $375.28 - $542.22

Q1 2023

Shares 2,468 Value ($000) $1,235 Avg Close $449.31 Range $331.60 - $518.64

Q4 2022

Shares 2,786 Value ($000) $985 Avg Close $350.38 Range $294.21 - $405.83

Q3 2022

Shares 3,906 Value ($000) $1,419 Avg Close $432.95 Range $338.72 - $526.93

Q2 2022

Shares 2,979 Value ($000) $1,144 Avg Close $410.37 Range $365.38 - $475.87

Q1 2022

Shares 3,312 Value ($000) $1,609 Avg Close $422.77 Range $340.68 - $499.27

Q4 2021

Shares 3,615 Value ($000) $1,783 Avg Close $500.08 Range $444.81 - $561.94

Q3 2021

Shares 4,864 Value ($000) $2,357 Avg Close $440.15 Range $351.70 - $504.81

Q2 2021

Shares 4,922 Value ($000) $1,838 Avg Close $340.03 Range $291.31 - $382.48

Q1 2021

Shares 5,916 Value ($000) $2,090 Avg Close $351.26 Range $290.78 - $392.28

Q4 2020

Shares 5,783 Value ($000) $2,118 Avg Close $308.64 Range $261.69 - $353.99

Q3 2020

Shares 5,873 Value ($000) $1,642 Avg Close $250.15 Range $223.49 - $273.49

Q2 2020

Shares 5,975 Value ($000) $1,416 Avg Close $194.18 Range $144.85 - $229.19

Q1 2020

Shares 6,137 Value ($000) $1,028 Avg Close $163.85 Range $124.42 - $184.64

Q4 2019

Shares 4,391 Value ($000) $782 Avg Close $152.39 Range $125.11 - $175.03

Q3 2019

Shares 5,037 Value ($000) $784 Avg Close $142.31 Range $127.77 - $155.32

Q2 2019

Shares 3,872 Value ($000) $526 Avg Close $129.05 Range $108.95 - $152.95

Q1 2019

Shares 3,888 Value ($000) $527 Avg Close $124.16 Range $101.64 - $137.81

Q4 2018

Shares 3,746 Value ($000) $435 Avg Close $112.91 Range $96.22 - $130.06

Q3 2018

Shares 7,037 Value ($000) $883 Avg Close $131.20 Range $117.51 - $143.26

Q2 2018

Shares 8,021 Value ($000) $1,072 Avg Close $119.62 Range $102.58 - $133.88

Q1 2018

Shares 8,172 Value ($000) $946 Avg Close $111.03 Range $96.61 - $119.53

Q4 2017

Shares 8,222 Value ($000) $924 Avg Close $108.54 Range $98.18 - $118.56

Q3 2017

Shares 8,318 Value ($000) $886 Avg Close $94.77 Range $87.95 - $100.67

Q2 2017

Shares 9,970 Value ($000) $961 Avg Close $88.76 Range $82.13 - $96.78

Q1 2017

Shares 10,522 Value ($000) $969 Avg Close $82.35 Range $76.05 - $87.81

Q4 2016

Shares 10,438 Value ($000) $855 Avg Close $74.44 Range $69.57 - $81.67

Q3 2016

Shares 10,640 Value ($000) $857 Avg Close $68.33 Range $60.21 - $75.04

Q2 2016

Shares 5,697 Value ($000) $389 Avg Close $60.38 Range $55.33 - $65.50

Q1 2016

Shares 5,697 Value ($000) $363 Avg Close $54.76 Range $50.58 - $59.11

Q4 2015

Shares 5,743 Value ($000) $366 Avg Close $56.88 Range $45.12 - $63.43

Q3 2015

Shares 5,697 Value ($000) $292 Avg Close $45.23 Range $37.18 - $48.10

Q2 2015

Shares 4,322 Value ($000) $219 Avg Close $48.11 Range $44.76 - $50.50

Period	Shares	Value ($000)	Average Close	Price Range
Q4 2025	1,771	$1,605	$960.73	$831.77 - $1121.48
Q3 2025	1,749	$1,610	$808.07	$684.50 - $934.81
Q2 2025	1,845	$1,349	$633.58	$436.42 - $750.80
Q1 2025	1,718	$996	$624.99	$550.94 - $718.03
Q4 2024	1,824	$1,079	$716.72	$541.09 - $944.19
Q3 2024	1,802	$1,666	$853.35	$721.11 - $948.49
Q2 2024	2,326	$1,911	$712.18	$577.26 - $845.04
Q1 2024	2,590	$1,755	$657.62	$552.66 - $766.48
Q4 2023	2,601	$1,641	$513.84	$385.61 - $636.41
Q3 2023	2,338	$1,080	$501.94	$430.22 - $584.79
Q2 2023	2,442	$1,319	$465.29	$375.28 - $542.22
Q1 2023	2,468	$1,235	$449.31	$331.60 - $518.64
Q4 2022	2,786	$985	$350.38	$294.21 - $405.83
Q3 2022	3,906	$1,419	$432.95	$338.72 - $526.93
Q2 2022	2,979	$1,144	$410.37	$365.38 - $475.87
Q1 2022	3,312	$1,609	$422.77	$340.68 - $499.27
Q4 2021	3,615	$1,783	$500.08	$444.81 - $561.94
Q3 2021	4,864	$2,357	$440.15	$351.70 - $504.81
Q2 2021	4,922	$1,838	$340.03	$291.31 - $382.48
Q1 2021	5,916	$2,090	$351.26	$290.78 - $392.28
Q4 2020	5,783	$2,118	$308.64	$261.69 - $353.99
Q3 2020	5,873	$1,642	$250.15	$223.49 - $273.49
Q2 2020	5,975	$1,416	$194.18	$144.85 - $229.19
Q1 2020	6,137	$1,028	$163.85	$124.42 - $184.64
Q4 2019	4,391	$782	$152.39	$125.11 - $175.03
Q3 2019	5,037	$784	$142.31	$127.77 - $155.32
Q2 2019	3,872	$526	$129.05	$108.95 - $152.95
Q1 2019	3,888	$527	$124.16	$101.64 - $137.81
Q4 2018	3,746	$435	$112.91	$96.22 - $130.06
Q3 2018	7,037	$883	$131.20	$117.51 - $143.26
Q2 2018	8,021	$1,072	$119.62	$102.58 - $133.88
Q1 2018	8,172	$946	$111.03	$96.61 - $119.53
Q4 2017	8,222	$924	$108.54	$98.18 - $118.56
Q3 2017	8,318	$886	$94.77	$87.95 - $100.67
Q2 2017	9,970	$961	$88.76	$82.13 - $96.78
Q1 2017	10,522	$969	$82.35	$76.05 - $87.81
Q4 2016	10,438	$855	$74.44	$69.57 - $81.67
Q3 2016	10,640	$857	$68.33	$60.21 - $75.04
Q2 2016	5,697	$389	$60.38	$55.33 - $65.50
Q1 2016	5,697	$363	$54.76	$50.58 - $59.11
Q4 2015	5,743	$366	$56.88	$45.12 - $63.43
Q3 2015	5,697	$292	$45.23	$37.18 - $48.10
Q2 2015	4,322	$219	$48.11	$44.76 - $50.50