MONOLITHIC PWR SYS INC

Ticker: MPWR CUSIP: 609839105 Class: COM

OPPENHEIMER & CO INC's Holding History (CIK: 0000822581)

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

Q4 2025

Shares 6,839 Value ($000) $6,199 Avg Close $960.73 Range $831.77 - $1121.48

Q3 2025

Shares 7,005 Value ($000) $6,449 Avg Close $808.07 Range $684.50 - $934.81

Q2 2025

Shares 7,238 Value ($000) $5,294 Avg Close $633.58 Range $436.42 - $750.80

Q1 2025

Shares 7,931 Value ($000) $4,600 Avg Close $624.99 Range $550.94 - $718.03

Q4 2024

Shares 4,233 Value ($000) $2,505 Avg Close $716.72 Range $541.09 - $944.19

Q3 2024

Shares 2,902 Value ($000) $2,683 Avg Close $853.35 Range $721.11 - $948.49

Q2 2024

Shares 3,900 Value ($000) $3,205 Avg Close $712.18 Range $577.26 - $845.04

Q1 2024

Shares 4,718 Value ($000) $3,196 Avg Close $657.62 Range $552.66 - $766.48

Q4 2023

Shares 4,108 Value ($000) $2,591 Avg Close $513.84 Range $385.61 - $636.41

Q3 2023

Shares 4,246 Value ($000) $1,962 Avg Close $501.94 Range $430.22 - $584.79

Q2 2023

Shares 3,985 Value ($000) $2,153 Avg Close $465.29 Range $375.28 - $542.22

Q1 2023

Shares 3,220 Value ($000) $1,612 Avg Close $449.31 Range $331.60 - $518.64

Q4 2022

Shares 3,963 Value ($000) $1,401 Avg Close $350.38 Range $294.21 - $405.83

Q3 2022

Shares 3,590 Value ($000) $1,305 Avg Close $432.95 Range $338.72 - $526.93

Q2 2022

Shares 3,752 Value ($000) $1,441 Avg Close $410.37 Range $365.38 - $475.87

Q1 2022

Shares 2,995 Value ($000) $1,455 Avg Close $422.77 Range $340.68 - $499.27

Q4 2021

Shares 3,177 Value ($000) $1,567 Avg Close $500.08 Range $444.81 - $561.94

Q3 2021

Shares 3,348 Value ($000) $1,622 Avg Close $440.15 Range $351.70 - $504.81

Q2 2021

Shares 3,073 Value ($000) $1,148 Avg Close $340.03 Range $291.31 - $382.48

Q1 2021

Shares 2,892 Value ($000) $1,021 Avg Close $351.26 Range $290.78 - $392.28

Q4 2020

Shares 3,205 Value ($000) $1,174 Avg Close $308.64 Range $261.69 - $353.99

Q3 2020

Shares 3,279 Value ($000) $917 Avg Close $250.15 Range $223.49 - $273.49

Q2 2020

Shares 4,888 Value ($000) $1,158 Avg Close $194.18 Range $144.85 - $229.19

Q1 2020

Shares 5,177 Value ($000) $866 Avg Close $163.85 Range $124.42 - $184.64

Q4 2019

Shares 6,157 Value ($000) $1,096 Avg Close $152.39 Range $125.11 - $175.03

Q3 2019

Shares 5,302 Value ($000) $825 Avg Close $142.31 Range $127.77 - $155.32

Q2 2019

Shares 6,500 Value ($000) $882 Avg Close $129.05 Range $108.95 - $152.95

Q1 2019

Shares 5,804 Value ($000) $786 Avg Close $124.16 Range $101.64 - $137.81

Q4 2018

Shares 4,225 Value ($000) $491 Avg Close $112.91 Range $96.22 - $130.06

Q3 2018

Shares 3,785 Value ($000) $475 Avg Close $131.20 Range $117.51 - $143.26

Q2 2018

Shares 3,710 Value ($000) $496 Avg Close $119.62 Range $102.58 - $133.88

Q1 2018

Shares 3,800 Value ($000) $440 Avg Close $111.03 Range $96.61 - $119.53

Q4 2017

Shares 3,824 Value ($000) $430 Avg Close $108.54 Range $98.18 - $118.56

Q3 2017

Shares 3,617 Value ($000) $385 Avg Close $94.77 Range $87.95 - $100.67

Q1 2017

Shares 2,193 Value ($000) $202 Avg Close $82.35 Range $76.05 - $87.81

Q3 2016

Shares 2,480 Value ($000) $200 Avg Close $68.33 Range $60.21 - $75.04

Period	Shares	Value ($000)	Average Close	Price Range
Q4 2025	6,839	$6,199	$960.73	$831.77 - $1121.48
Q3 2025	7,005	$6,449	$808.07	$684.50 - $934.81
Q2 2025	7,238	$5,294	$633.58	$436.42 - $750.80
Q1 2025	7,931	$4,600	$624.99	$550.94 - $718.03
Q4 2024	4,233	$2,505	$716.72	$541.09 - $944.19
Q3 2024	2,902	$2,683	$853.35	$721.11 - $948.49
Q2 2024	3,900	$3,205	$712.18	$577.26 - $845.04
Q1 2024	4,718	$3,196	$657.62	$552.66 - $766.48
Q4 2023	4,108	$2,591	$513.84	$385.61 - $636.41
Q3 2023	4,246	$1,962	$501.94	$430.22 - $584.79
Q2 2023	3,985	$2,153	$465.29	$375.28 - $542.22
Q1 2023	3,220	$1,612	$449.31	$331.60 - $518.64
Q4 2022	3,963	$1,401	$350.38	$294.21 - $405.83
Q3 2022	3,590	$1,305	$432.95	$338.72 - $526.93
Q2 2022	3,752	$1,441	$410.37	$365.38 - $475.87
Q1 2022	2,995	$1,455	$422.77	$340.68 - $499.27
Q4 2021	3,177	$1,567	$500.08	$444.81 - $561.94
Q3 2021	3,348	$1,622	$440.15	$351.70 - $504.81
Q2 2021	3,073	$1,148	$340.03	$291.31 - $382.48
Q1 2021	2,892	$1,021	$351.26	$290.78 - $392.28
Q4 2020	3,205	$1,174	$308.64	$261.69 - $353.99
Q3 2020	3,279	$917	$250.15	$223.49 - $273.49
Q2 2020	4,888	$1,158	$194.18	$144.85 - $229.19
Q1 2020	5,177	$866	$163.85	$124.42 - $184.64
Q4 2019	6,157	$1,096	$152.39	$125.11 - $175.03
Q3 2019	5,302	$825	$142.31	$127.77 - $155.32
Q2 2019	6,500	$882	$129.05	$108.95 - $152.95
Q1 2019	5,804	$786	$124.16	$101.64 - $137.81
Q4 2018	4,225	$491	$112.91	$96.22 - $130.06
Q3 2018	3,785	$475	$131.20	$117.51 - $143.26
Q2 2018	3,710	$496	$119.62	$102.58 - $133.88
Q1 2018	3,800	$440	$111.03	$96.61 - $119.53
Q4 2017	3,824	$430	$108.54	$98.18 - $118.56
Q3 2017	3,617	$385	$94.77	$87.95 - $100.67
Q1 2017	2,193	$202	$82.35	$76.05 - $87.81
Q3 2016	2,480	$200	$68.33	$60.21 - $75.04