MONOLITHIC PWR SYS INC

Ticker: MPWR CUSIP: 609839105 Class: COM

MASSACHUSETTS FINANCIAL SERVICES CO /MA/'s Holding History (CIK: 0000912938)

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

Q4 2025

Shares 570,719 Value ($000) $517,277 Avg Close $960.73 Range $831.77 - $1121.48

Q3 2025

Shares 556,587 Value ($000) $512,416 Avg Close $808.07 Range $684.50 - $934.81

Q2 2025

Shares 485,388 Value ($000) $355,003 Avg Close $633.58 Range $436.42 - $750.80

Q1 2025

Shares 457,551 Value ($000) $265,370 Avg Close $624.99 Range $550.94 - $718.03

Q4 2024

Shares 488,300 Value ($000) $288,927 Avg Close $716.72 Range $541.09 - $944.19

Q3 2024

Shares 678,093 Value ($000) $626,897 Avg Close $853.35 Range $721.11 - $948.49

Q2 2024

Shares 941,376 Value ($000) $773,510 Avg Close $712.18 Range $577.26 - $845.04

Q1 2024

Shares 985,041 Value ($000) $667,286 Avg Close $657.62 Range $552.66 - $766.48

Q4 2023

Shares 1,056,183 Value ($000) $666,219 Avg Close $513.84 Range $385.61 - $636.41

Q3 2023

Shares 1,053,078 Value ($000) $486,522 Avg Close $501.94 Range $430.22 - $584.79

Q2 2023

Shares 1,091,211 Value ($000) $589,505 Avg Close $465.29 Range $375.28 - $542.22

Q1 2023

Shares 1,130,907 Value ($000) $566,064 Avg Close $449.31 Range $331.60 - $518.64

Q4 2022

Shares 1,119,953 Value ($000) $396,027 Avg Close $350.38 Range $294.21 - $405.83

Q3 2022

Shares 1,276,853 Value ($000) $464,010 Avg Close $432.95 Range $338.72 - $526.93

Q2 2022

Shares 1,273,178 Value ($000) $488,952 Avg Close $410.37 Range $365.38 - $475.87

Q1 2022

Shares 1,129,893 Value ($000) $548,768 Avg Close $422.77 Range $340.68 - $499.27

Q4 2021

Shares 1,144,650 Value ($000) $564,690 Avg Close $500.08 Range $444.81 - $561.94

Q3 2021

Shares 1,220,347 Value ($000) $591,478 Avg Close $440.15 Range $351.70 - $504.81

Q2 2021

Shares 1,231,776 Value ($000) $460,007 Avg Close $340.03 Range $291.31 - $382.48

Q1 2021

Shares 1,248,472 Value ($000) $440,974 Avg Close $351.26 Range $290.78 - $392.28

Q4 2020

Shares 1,225,377 Value ($000) $448,770 Avg Close $308.64 Range $261.69 - $353.99

Q3 2020

Shares 1,256,050 Value ($000) $351,205 Avg Close $250.15 Range $223.49 - $273.49

Q2 2020

Shares 1,220,903 Value ($000) $289,355 Avg Close $194.18 Range $144.85 - $229.19

Q1 2020

Shares 1,058,850 Value ($000) $177,315 Avg Close $163.85 Range $124.42 - $184.64

Q4 2019

Shares 1,138,693 Value ($000) $202,710 Avg Close $152.39 Range $125.11 - $175.03

Q3 2019

Shares 951,482 Value ($000) $148,078 Avg Close $142.31 Range $127.77 - $155.32

Q2 2019

Shares 881,860 Value ($000) $119,739 Avg Close $129.05 Range $108.95 - $152.95

Q1 2019

Shares 710,071 Value ($000) $96,208 Avg Close $124.16 Range $101.64 - $137.81

Q4 2018

Shares 670,753 Value ($000) $77,975 Avg Close $112.91 Range $96.22 - $130.06

Q3 2018

Shares 563,249 Value ($000) $70,705 Avg Close $131.20 Range $117.51 - $143.26

Q2 2018

Shares 569,494 Value ($000) $76,124 Avg Close $119.62 Range $102.58 - $133.88

Q1 2018

Shares 554,160 Value ($000) $64,155 Avg Close $111.03 Range $96.61 - $119.53

Q4 2017

Shares 552,163 Value ($000) $62,041 Avg Close $108.54 Range $98.18 - $118.56

Q3 2017

Shares 506,345 Value ($000) $53,951 Avg Close $94.77 Range $87.95 - $100.67

Q2 2017

Shares 458,107 Value ($000) $44,162 Avg Close $88.76 Range $82.13 - $96.78

Q1 2017

Shares 481,326 Value ($000) $44,330 Avg Close $82.35 Range $76.05 - $87.81

Q4 2016

Shares 466,174 Value ($000) $38,194 Avg Close $74.44 Range $69.57 - $81.67

Q3 2016

Shares 485,871 Value ($000) $39,113 Avg Close $68.33 Range $60.21 - $75.04

Q2 2016

Shares 479,229 Value ($000) $32,741 Avg Close $60.38 Range $55.33 - $65.50

Q1 2016

Shares 446,295 Value ($000) $28,403 Avg Close $54.76 Range $50.58 - $59.11

Q4 2015

Shares 390,468 Value ($000) $24,877 Avg Close $56.88 Range $45.12 - $63.43

Q3 2015

Shares 391,520 Value ($000) $20,046 Avg Close $45.23 Range $37.18 - $48.10

Q2 2015

Shares 284,964 Value ($000) $14,450,524 Avg Close $48.11 Range $44.76 - $50.50

Q1 2015

Shares 289,384 Value ($000) $15,236,068 Avg Close $45.64 Range $40.76 - $50.87

Q4 2014

Shares 203,179 Value ($000) $10,106,123 Avg Close $40.54 Range $30.68 - $45.83

Q3 2013

Shares 630,562 Value ($000) $19,093,417 Avg Close $25.18 Range $21.26 - $28.18

Q2 2013

Shares 925,522 Value ($000) $22,314,336 Avg Close $21.28 Range $18.50 - $22.86

Period	Shares	Value ($000)	Average Close	Price Range
Q4 2025	570,719	$517,277	$960.73	$831.77 - $1121.48
Q3 2025	556,587	$512,416	$808.07	$684.50 - $934.81
Q2 2025	485,388	$355,003	$633.58	$436.42 - $750.80
Q1 2025	457,551	$265,370	$624.99	$550.94 - $718.03
Q4 2024	488,300	$288,927	$716.72	$541.09 - $944.19
Q3 2024	678,093	$626,897	$853.35	$721.11 - $948.49
Q2 2024	941,376	$773,510	$712.18	$577.26 - $845.04
Q1 2024	985,041	$667,286	$657.62	$552.66 - $766.48
Q4 2023	1,056,183	$666,219	$513.84	$385.61 - $636.41
Q3 2023	1,053,078	$486,522	$501.94	$430.22 - $584.79
Q2 2023	1,091,211	$589,505	$465.29	$375.28 - $542.22
Q1 2023	1,130,907	$566,064	$449.31	$331.60 - $518.64
Q4 2022	1,119,953	$396,027	$350.38	$294.21 - $405.83
Q3 2022	1,276,853	$464,010	$432.95	$338.72 - $526.93
Q2 2022	1,273,178	$488,952	$410.37	$365.38 - $475.87
Q1 2022	1,129,893	$548,768	$422.77	$340.68 - $499.27
Q4 2021	1,144,650	$564,690	$500.08	$444.81 - $561.94
Q3 2021	1,220,347	$591,478	$440.15	$351.70 - $504.81
Q2 2021	1,231,776	$460,007	$340.03	$291.31 - $382.48
Q1 2021	1,248,472	$440,974	$351.26	$290.78 - $392.28
Q4 2020	1,225,377	$448,770	$308.64	$261.69 - $353.99
Q3 2020	1,256,050	$351,205	$250.15	$223.49 - $273.49
Q2 2020	1,220,903	$289,355	$194.18	$144.85 - $229.19
Q1 2020	1,058,850	$177,315	$163.85	$124.42 - $184.64
Q4 2019	1,138,693	$202,710	$152.39	$125.11 - $175.03
Q3 2019	951,482	$148,078	$142.31	$127.77 - $155.32
Q2 2019	881,860	$119,739	$129.05	$108.95 - $152.95
Q1 2019	710,071	$96,208	$124.16	$101.64 - $137.81
Q4 2018	670,753	$77,975	$112.91	$96.22 - $130.06
Q3 2018	563,249	$70,705	$131.20	$117.51 - $143.26
Q2 2018	569,494	$76,124	$119.62	$102.58 - $133.88
Q1 2018	554,160	$64,155	$111.03	$96.61 - $119.53
Q4 2017	552,163	$62,041	$108.54	$98.18 - $118.56
Q3 2017	506,345	$53,951	$94.77	$87.95 - $100.67
Q2 2017	458,107	$44,162	$88.76	$82.13 - $96.78
Q1 2017	481,326	$44,330	$82.35	$76.05 - $87.81
Q4 2016	466,174	$38,194	$74.44	$69.57 - $81.67
Q3 2016	485,871	$39,113	$68.33	$60.21 - $75.04
Q2 2016	479,229	$32,741	$60.38	$55.33 - $65.50
Q1 2016	446,295	$28,403	$54.76	$50.58 - $59.11
Q4 2015	390,468	$24,877	$56.88	$45.12 - $63.43
Q3 2015	391,520	$20,046	$45.23	$37.18 - $48.10
Q2 2015	284,964	$14,450,524	$48.11	$44.76 - $50.50
Q1 2015	289,384	$15,236,068	$45.64	$40.76 - $50.87
Q4 2014	203,179	$10,106,123	$40.54	$30.68 - $45.83
Q3 2013	630,562	$19,093,417	$25.18	$21.26 - $28.18
Q2 2013	925,522	$22,314,336	$21.28	$18.50 - $22.86