MONOLITHIC PWR SYS INC

Ticker: MPWR CUSIP: 609839105 Class: COM

STATE OF WISCONSIN INVESTMENT BOARD's Holding History (CIK: 0000854157)

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

Q4 2025

Shares 29,357 Value ($000) $26,608 Avg Close $960.73 Range $831.77 - $1121.48

Q3 2025

Shares 28,142 Value ($000) $25,909 Avg Close $808.07 Range $684.50 - $934.81

Q2 2025

Shares 25,509 Value ($000) $18,657 Avg Close $633.58 Range $436.42 - $750.80

Q1 2025

Shares 27,465 Value ($000) $15,929 Avg Close $624.99 Range $550.94 - $718.03

Q4 2024

Shares 26,885 Value ($000) $15,908 Avg Close $716.72 Range $541.09 - $944.19

Q3 2024

Shares 33,677 Value ($000) $31,134 Avg Close $853.35 Range $721.11 - $948.49

Q2 2024

Shares 27,659 Value ($000) $22,727 Avg Close $712.18 Range $577.26 - $845.04

Q1 2024

Shares 31,693 Value ($000) $21,469 Avg Close $657.62 Range $552.66 - $766.48

Q4 2023

Shares 25,439 Value ($000) $16,046 Avg Close $513.84 Range $385.61 - $636.41

Q3 2023

Shares 25,223 Value ($000) $11,653 Avg Close $501.94 Range $430.22 - $584.79

Q2 2023

Shares 23,402 Value ($000) $12,642 Avg Close $465.29 Range $375.28 - $542.22

Q1 2023

Shares 23,639 Value ($000) $11,832 Avg Close $449.31 Range $331.60 - $518.64

Q4 2022

Shares 30,972 Value ($000) $10,952 Avg Close $350.38 Range $294.21 - $405.83

Q3 2022

Shares 31,312 Value ($000) $11,379 Avg Close $432.95 Range $338.72 - $526.93

Q2 2022

Shares 35,465 Value ($000) $13,620 Avg Close $410.37 Range $365.38 - $475.87

Q1 2022

Shares 42,270 Value ($000) $20,530 Avg Close $422.77 Range $340.68 - $499.27

Q4 2021

Shares 45,648 Value ($000) $22,520 Avg Close $500.08 Range $444.81 - $561.94

Q3 2021

Shares 43,366 Value ($000) $21,019 Avg Close $440.15 Range $351.70 - $504.81

Q2 2021

Shares 40,686 Value ($000) $15,194 Avg Close $340.03 Range $291.31 - $382.48

Q1 2021

Shares 35,633 Value ($000) $12,586 Avg Close $351.26 Range $290.78 - $392.28

Q4 2020

Shares 34,224 Value ($000) $12,534 Avg Close $308.64 Range $261.69 - $353.99

Q3 2020

Shares 50,748 Value ($000) $14,190 Avg Close $250.15 Range $223.49 - $273.49

Q2 2020

Shares 69,120 Value ($000) $16,381 Avg Close $194.18 Range $144.85 - $229.19

Q1 2020

Shares 94,540 Value ($000) $15,832 Avg Close $163.85 Range $124.42 - $184.64

Q4 2019

Shares 94,720 Value ($000) $16,862 Avg Close $152.39 Range $125.11 - $175.03

Q3 2019

Shares 105,920 Value ($000) $16,484 Avg Close $142.31 Range $127.77 - $155.32

Q2 2019

Shares 128,216 Value ($000) $17,409 Avg Close $129.05 Range $108.95 - $152.95

Q1 2019

Shares 146,387 Value ($000) $19,834 Avg Close $124.16 Range $101.64 - $137.81

Q4 2018

Shares 151,807 Value ($000) $17,648 Avg Close $112.91 Range $96.22 - $130.06

Q3 2018

Shares 157,207 Value ($000) $19,734 Avg Close $131.20 Range $117.51 - $143.26

Q2 2018

Shares 169,967 Value ($000) $22,719 Avg Close $119.62 Range $102.58 - $133.88

Q1 2018

Shares 165,000 Value ($000) $19,102 Avg Close $111.03 Range $96.61 - $119.53

Q4 2017

Shares 215,000 Value ($000) $24,157 Avg Close $108.54 Range $98.18 - $118.56

Q3 2017

Shares 227,000 Value ($000) $24,187 Avg Close $94.77 Range $87.95 - $100.67

Q2 2017

Shares 253,000 Value ($000) $24,389 Avg Close $88.76 Range $82.13 - $96.78

Q1 2017

Shares 295,000 Value ($000) $27,169 Avg Close $82.35 Range $76.05 - $87.81

Q4 2016

Shares 324,951 Value ($000) $26,623 Avg Close $74.44 Range $69.57 - $81.67

Q3 2016

Shares 412,410 Value ($000) $33,199 Avg Close $68.33 Range $60.21 - $75.04

Q2 2016

Shares 422,410 Value ($000) $28,859 Avg Close $60.38 Range $55.33 - $65.50

Q1 2016

Shares 422,410 Value ($000) $26,882 Avg Close $54.76 Range $50.58 - $59.11

Q4 2015

Shares 485,231 Value ($000) $30,914 Avg Close $56.88 Range $45.12 - $63.43

Q3 2015

Shares 438,152 Value ($000) $22,433 Avg Close $45.23 Range $37.18 - $48.10

Q2 2015

Shares 438,152 Value ($000) $22,219 Avg Close $48.11 Range $44.76 - $50.50

Q1 2015

Shares 445,152 Value ($000) $23,437 Avg Close $45.64 Range $40.76 - $50.87

Q4 2014

Shares 445,152 Value ($000) $22,142 Avg Close $40.54 Range $30.68 - $45.83

Q3 2014

Shares 566,575 Value ($000) $24,958 Avg Close $39.57 Range $36.40 - $43.40

Q2 2014

Shares 576,575 Value ($000) $24,418 Avg Close $34.76 Range $31.35 - $38.50

Q1 2014

Shares 605,395 Value ($000) $23,471 Avg Close $31.60 Range $27.60 - $35.10

Q4 2013

Shares 605,395 Value ($000) $20,983 Avg Close $28.65 Range $24.43 - $31.16

Q3 2013

Shares 590,014 Value ($000) $17,866 Avg Close $25.18 Range $21.26 - $28.18

Q2 2013

Shares 673,186 Value ($000) $16,231 Avg Close $21.28 Range $18.50 - $22.86

Period	Shares	Value ($000)	Average Close	Price Range
Q4 2025	29,357	$26,608	$960.73	$831.77 - $1121.48
Q3 2025	28,142	$25,909	$808.07	$684.50 - $934.81
Q2 2025	25,509	$18,657	$633.58	$436.42 - $750.80
Q1 2025	27,465	$15,929	$624.99	$550.94 - $718.03
Q4 2024	26,885	$15,908	$716.72	$541.09 - $944.19
Q3 2024	33,677	$31,134	$853.35	$721.11 - $948.49
Q2 2024	27,659	$22,727	$712.18	$577.26 - $845.04
Q1 2024	31,693	$21,469	$657.62	$552.66 - $766.48
Q4 2023	25,439	$16,046	$513.84	$385.61 - $636.41
Q3 2023	25,223	$11,653	$501.94	$430.22 - $584.79
Q2 2023	23,402	$12,642	$465.29	$375.28 - $542.22
Q1 2023	23,639	$11,832	$449.31	$331.60 - $518.64
Q4 2022	30,972	$10,952	$350.38	$294.21 - $405.83
Q3 2022	31,312	$11,379	$432.95	$338.72 - $526.93
Q2 2022	35,465	$13,620	$410.37	$365.38 - $475.87
Q1 2022	42,270	$20,530	$422.77	$340.68 - $499.27
Q4 2021	45,648	$22,520	$500.08	$444.81 - $561.94
Q3 2021	43,366	$21,019	$440.15	$351.70 - $504.81
Q2 2021	40,686	$15,194	$340.03	$291.31 - $382.48
Q1 2021	35,633	$12,586	$351.26	$290.78 - $392.28
Q4 2020	34,224	$12,534	$308.64	$261.69 - $353.99
Q3 2020	50,748	$14,190	$250.15	$223.49 - $273.49
Q2 2020	69,120	$16,381	$194.18	$144.85 - $229.19
Q1 2020	94,540	$15,832	$163.85	$124.42 - $184.64
Q4 2019	94,720	$16,862	$152.39	$125.11 - $175.03
Q3 2019	105,920	$16,484	$142.31	$127.77 - $155.32
Q2 2019	128,216	$17,409	$129.05	$108.95 - $152.95
Q1 2019	146,387	$19,834	$124.16	$101.64 - $137.81
Q4 2018	151,807	$17,648	$112.91	$96.22 - $130.06
Q3 2018	157,207	$19,734	$131.20	$117.51 - $143.26
Q2 2018	169,967	$22,719	$119.62	$102.58 - $133.88
Q1 2018	165,000	$19,102	$111.03	$96.61 - $119.53
Q4 2017	215,000	$24,157	$108.54	$98.18 - $118.56
Q3 2017	227,000	$24,187	$94.77	$87.95 - $100.67
Q2 2017	253,000	$24,389	$88.76	$82.13 - $96.78
Q1 2017	295,000	$27,169	$82.35	$76.05 - $87.81
Q4 2016	324,951	$26,623	$74.44	$69.57 - $81.67
Q3 2016	412,410	$33,199	$68.33	$60.21 - $75.04
Q2 2016	422,410	$28,859	$60.38	$55.33 - $65.50
Q1 2016	422,410	$26,882	$54.76	$50.58 - $59.11
Q4 2015	485,231	$30,914	$56.88	$45.12 - $63.43
Q3 2015	438,152	$22,433	$45.23	$37.18 - $48.10
Q2 2015	438,152	$22,219	$48.11	$44.76 - $50.50
Q1 2015	445,152	$23,437	$45.64	$40.76 - $50.87
Q4 2014	445,152	$22,142	$40.54	$30.68 - $45.83
Q3 2014	566,575	$24,958	$39.57	$36.40 - $43.40
Q2 2014	576,575	$24,418	$34.76	$31.35 - $38.50
Q1 2014	605,395	$23,471	$31.60	$27.60 - $35.10
Q4 2013	605,395	$20,983	$28.65	$24.43 - $31.16
Q3 2013	590,014	$17,866	$25.18	$21.26 - $28.18
Q2 2013	673,186	$16,231	$21.28	$18.50 - $22.86