MONOLITHIC PWR SYS INC

Ticker: MPWR CUSIP: 609839105 Class: COM

PRICE T ROWE ASSOCIATES INC /MD/'s Holding History (CIK: 0000080255)

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

Q4 2025

Shares 1,691,394 Value ($000) $1,533 Avg Close $960.73 Range $831.77 - $1121.48

Q3 2025

Shares 1,573,798 Value ($000) $1,449 Avg Close $808.07 Range $684.50 - $934.81

Q2 2025

Shares 2,088,804 Value ($000) $1,528 Avg Close $633.58 Range $436.42 - $750.80

Q1 2025

Shares 2,034,731 Value ($000) $1,180 Avg Close $624.99 Range $550.94 - $718.03

Q4 2024

Shares 1,528,301 Value ($000) $904 Avg Close $716.72 Range $541.09 - $944.19

Q3 2024

Shares 1,313,906 Value ($000) $1,215 Avg Close $853.35 Range $721.11 - $948.49

Q2 2024

Shares 1,658,486 Value ($000) $1,363 Avg Close $712.18 Range $577.26 - $845.04

Q1 2024

Shares 2,159,962 Value ($000) $1,463 Avg Close $657.62 Range $552.66 - $766.48

Q4 2023

Shares 2,192,561 Value ($000) $1,383 Avg Close $513.84 Range $385.61 - $636.41

Q3 2023

Shares 1,814,638 Value ($000) $838 Avg Close $501.94 Range $430.22 - $584.79

Q2 2023

Shares 2,420,260 Value ($000) $1,307 Avg Close $465.29 Range $375.28 - $542.22

Q1 2023

Shares 3,334,397 Value ($000) $1,669 Avg Close $449.31 Range $331.60 - $518.64

Q4 2022

Shares 3,651,445 Value ($000) $1,291 Avg Close $350.38 Range $294.21 - $405.83

Q3 2022

Shares 1,743,681 Value ($000) $640,215 Avg Close $432.95 Range $338.72 - $526.93

Q2 2022

Shares 1,466,393 Value ($000) $563,154 Avg Close $410.37 Range $365.38 - $475.87

Q1 2022

Shares 1,505,118 Value ($000) $731,006 Avg Close $422.77 Range $340.68 - $499.27

Q4 2021

Shares 1,635,895 Value ($000) $807,036 Avg Close $500.08 Range $444.81 - $561.94

Q3 2021

Shares 1,517,738 Value ($000) $735,617 Avg Close $440.15 Range $351.70 - $504.81

Q2 2021

Shares 405,551 Value ($000) $151,453 Avg Close $340.03 Range $291.31 - $382.48

Q1 2021

Shares 911,552 Value ($000) $321,969 Avg Close $351.26 Range $290.78 - $392.28

Q4 2020

Shares 1,837,795 Value ($000) $673,056 Avg Close $308.64 Range $261.69 - $353.99

Q3 2020

Shares 932,183 Value ($000) $260,648 Avg Close $250.15 Range $223.49 - $273.49

Q2 2020

Shares 790,720 Value ($000) $187,401 Avg Close $194.18 Range $144.85 - $229.19

Q1 2020

Shares 852,879 Value ($000) $142,823 Avg Close $163.85 Range $124.42 - $184.64

Q4 2019

Shares 838,331 Value ($000) $149,240 Avg Close $152.39 Range $125.11 - $175.03

Q3 2019

Shares 800,338 Value ($000) $124,557 Avg Close $142.31 Range $127.77 - $155.32

Q2 2019

Shares 718,884 Value ($000) $97,610 Avg Close $129.05 Range $108.95 - $152.95

Q1 2019

Shares 529,893 Value ($000) $71,795 Avg Close $124.16 Range $101.64 - $137.81

Q4 2018

Shares 330,317 Value ($000) $38,399 Avg Close $112.91 Range $96.22 - $130.06

Q3 2018

Shares 256,960 Value ($000) $32,256 Avg Close $131.20 Range $117.51 - $143.26

Q2 2018

Shares 287,439 Value ($000) $38,422 Avg Close $119.62 Range $102.58 - $133.88

Q1 2018

Shares 239,686 Value ($000) $27,748 Avg Close $111.03 Range $96.61 - $119.53

Q4 2017

Shares 9,802 Value ($000) $1,101 Avg Close $108.54 Range $98.18 - $118.56

Q3 2017

Shares 9,812 Value ($000) $1,045 Avg Close $94.77 Range $87.95 - $100.67

Q2 2017

Shares 8,612 Value ($000) $830 Avg Close $88.76 Range $82.13 - $96.78

Q1 2017

Shares 8,607 Value ($000) $793 Avg Close $82.35 Range $76.05 - $87.81

Q4 2016

Shares 63,207 Value ($000) $5,179 Avg Close $74.44 Range $69.57 - $81.67

Q3 2016

Shares 56,310 Value ($000) $4,533 Avg Close $68.33 Range $60.21 - $75.04

Q2 2016

Shares 61,310 Value ($000) $4,189 Avg Close $60.38 Range $55.33 - $65.50

Q1 2016

Shares 59,700 Value ($000) $3,799 Avg Close $54.76 Range $50.58 - $59.11

Q4 2015

Shares 70,500 Value ($000) $4,492 Avg Close $56.88 Range $45.12 - $63.43

Q3 2015

Shares 75,400 Value ($000) $3,860 Avg Close $45.23 Range $37.18 - $48.10

Q2 2015

Shares 75,400 Value ($000) $3,824 Avg Close $48.11 Range $44.76 - $50.50

Q1 2015

Shares 78,400 Value ($000) $4,128 Avg Close $45.64 Range $40.76 - $50.87

Q4 2014

Shares 78,400 Value ($000) $3,900 Avg Close $40.54 Range $30.68 - $45.83

Q3 2014

Shares 87,400 Value ($000) $3,850 Avg Close $39.57 Range $36.40 - $43.40

Q2 2014

Shares 91,800 Value ($000) $3,888 Avg Close $34.76 Range $31.35 - $38.50

Q1 2014

Shares 105,800 Value ($000) $4,102 Avg Close $31.60 Range $27.60 - $35.10

Q4 2013

Shares 105,800 Value ($000) $3,667 Avg Close $28.65 Range $24.43 - $31.16

Q3 2013

Shares 90,500 Value ($000) $2,740 Avg Close $25.18 Range $21.26 - $28.18

Q2 2013

Shares 88,100 Value ($000) $2,124 Avg Close $21.28 Range $18.50 - $22.86

Period	Shares	Value ($000)	Average Close	Price Range
Q4 2025	1,691,394	$1,533	$960.73	$831.77 - $1121.48
Q3 2025	1,573,798	$1,449	$808.07	$684.50 - $934.81
Q2 2025	2,088,804	$1,528	$633.58	$436.42 - $750.80
Q1 2025	2,034,731	$1,180	$624.99	$550.94 - $718.03
Q4 2024	1,528,301	$904	$716.72	$541.09 - $944.19
Q3 2024	1,313,906	$1,215	$853.35	$721.11 - $948.49
Q2 2024	1,658,486	$1,363	$712.18	$577.26 - $845.04
Q1 2024	2,159,962	$1,463	$657.62	$552.66 - $766.48
Q4 2023	2,192,561	$1,383	$513.84	$385.61 - $636.41
Q3 2023	1,814,638	$838	$501.94	$430.22 - $584.79
Q2 2023	2,420,260	$1,307	$465.29	$375.28 - $542.22
Q1 2023	3,334,397	$1,669	$449.31	$331.60 - $518.64
Q4 2022	3,651,445	$1,291	$350.38	$294.21 - $405.83
Q3 2022	1,743,681	$640,215	$432.95	$338.72 - $526.93
Q2 2022	1,466,393	$563,154	$410.37	$365.38 - $475.87
Q1 2022	1,505,118	$731,006	$422.77	$340.68 - $499.27
Q4 2021	1,635,895	$807,036	$500.08	$444.81 - $561.94
Q3 2021	1,517,738	$735,617	$440.15	$351.70 - $504.81
Q2 2021	405,551	$151,453	$340.03	$291.31 - $382.48
Q1 2021	911,552	$321,969	$351.26	$290.78 - $392.28
Q4 2020	1,837,795	$673,056	$308.64	$261.69 - $353.99
Q3 2020	932,183	$260,648	$250.15	$223.49 - $273.49
Q2 2020	790,720	$187,401	$194.18	$144.85 - $229.19
Q1 2020	852,879	$142,823	$163.85	$124.42 - $184.64
Q4 2019	838,331	$149,240	$152.39	$125.11 - $175.03
Q3 2019	800,338	$124,557	$142.31	$127.77 - $155.32
Q2 2019	718,884	$97,610	$129.05	$108.95 - $152.95
Q1 2019	529,893	$71,795	$124.16	$101.64 - $137.81
Q4 2018	330,317	$38,399	$112.91	$96.22 - $130.06
Q3 2018	256,960	$32,256	$131.20	$117.51 - $143.26
Q2 2018	287,439	$38,422	$119.62	$102.58 - $133.88
Q1 2018	239,686	$27,748	$111.03	$96.61 - $119.53
Q4 2017	9,802	$1,101	$108.54	$98.18 - $118.56
Q3 2017	9,812	$1,045	$94.77	$87.95 - $100.67
Q2 2017	8,612	$830	$88.76	$82.13 - $96.78
Q1 2017	8,607	$793	$82.35	$76.05 - $87.81
Q4 2016	63,207	$5,179	$74.44	$69.57 - $81.67
Q3 2016	56,310	$4,533	$68.33	$60.21 - $75.04
Q2 2016	61,310	$4,189	$60.38	$55.33 - $65.50
Q1 2016	59,700	$3,799	$54.76	$50.58 - $59.11
Q4 2015	70,500	$4,492	$56.88	$45.12 - $63.43
Q3 2015	75,400	$3,860	$45.23	$37.18 - $48.10
Q2 2015	75,400	$3,824	$48.11	$44.76 - $50.50
Q1 2015	78,400	$4,128	$45.64	$40.76 - $50.87
Q4 2014	78,400	$3,900	$40.54	$30.68 - $45.83
Q3 2014	87,400	$3,850	$39.57	$36.40 - $43.40
Q2 2014	91,800	$3,888	$34.76	$31.35 - $38.50
Q1 2014	105,800	$4,102	$31.60	$27.60 - $35.10
Q4 2013	105,800	$3,667	$28.65	$24.43 - $31.16
Q3 2013	90,500	$2,740	$25.18	$21.26 - $28.18
Q2 2013	88,100	$2,124	$21.28	$18.50 - $22.86