MONOLITHIC PWR SYS INC

Ticker: MPWR CUSIP: 609839105 Class: COM

FRONTIER CAPITAL MANAGEMENT CO LLC's Holding History (CIK: 0000351173)

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

Q4 2025

Shares 84,118 Value ($000) $76,241 Avg Close $960.73 Range $831.77 - $1121.48

Q3 2025

Shares 163,916 Value ($000) $150,908 Avg Close $808.07 Range $684.50 - $934.81

Q2 2025

Shares 132,843 Value ($000) $97,159 Avg Close $633.58 Range $436.42 - $750.80

Q1 2025

Shares 128,722 Value ($000) $74,656 Avg Close $624.99 Range $550.94 - $718.03

Q4 2024

Shares 149,453 Value ($000) $88,431 Avg Close $716.72 Range $541.09 - $944.19

Q3 2024

Shares 142,716 Value ($000) $131,941 Avg Close $853.35 Range $721.11 - $948.49

Q2 2024

Shares 127,448 Value ($000) $104,721 Avg Close $712.18 Range $577.26 - $845.04

Q1 2024

Shares 136,149 Value ($000) $92,230 Avg Close $657.62 Range $552.66 - $766.48

Q4 2023

Shares 196,025 Value ($000) $123,648 Avg Close $513.84 Range $385.61 - $636.41

Q3 2023

Shares 180,762 Value ($000) $83,512 Avg Close $501.94 Range $430.22 - $584.79

Q2 2023

Shares 228,609 Value ($000) $123,501 Avg Close $465.29 Range $375.28 - $542.22

Q1 2023

Shares 141,962 Value ($000) $71,058 Avg Close $449.31 Range $331.60 - $518.64

Q4 2022

Shares 137,762 Value ($000) $48,714 Avg Close $350.38 Range $294.21 - $405.83

Q3 2022

Shares 98,605 Value ($000) $35,833 Avg Close $432.95 Range $338.72 - $526.93

Q2 2022

Shares 102,170 Value ($000) $39,237 Avg Close $410.37 Range $365.38 - $475.87

Q1 2022

Shares 22,474 Value ($000) $10,915 Avg Close $422.77 Range $340.68 - $499.27

Q4 2021

Shares 22,552 Value ($000) $11,126 Avg Close $500.08 Range $444.81 - $561.94

Q3 2021

Shares 27,754 Value ($000) $13,452 Avg Close $440.15 Range $351.70 - $504.81

Q2 2021

Shares 41,563 Value ($000) $15,522 Avg Close $340.03 Range $291.31 - $382.48

Q1 2021

Shares 35,705 Value ($000) $12,611 Avg Close $351.26 Range $290.78 - $392.28

Q4 2020

Shares 52,465 Value ($000) $19,214 Avg Close $308.64 Range $261.69 - $353.99

Q3 2020

Shares 265,449 Value ($000) $74,222 Avg Close $250.15 Range $223.49 - $273.49

Q2 2020

Shares 362,465 Value ($000) $85,904 Avg Close $194.18 Range $144.85 - $229.19

Q1 2020

Shares 456,990 Value ($000) $76,528 Avg Close $163.85 Range $124.42 - $184.64

Q4 2019

Shares 590,008 Value ($000) $105,033 Avg Close $152.39 Range $125.11 - $175.03

Q3 2019

Shares 701,685 Value ($000) $109,203 Avg Close $142.31 Range $127.77 - $155.32

Q2 2019

Shares 711,531 Value ($000) $96,612 Avg Close $129.05 Range $108.95 - $152.95

Q1 2019

Shares 845,142 Value ($000) $114,508 Avg Close $124.16 Range $101.64 - $137.81

Q4 2018

Shares 816,184 Value ($000) $94,881 Avg Close $112.91 Range $96.22 - $130.06

Q3 2018

Shares 1,025,467 Value ($000) $128,727 Avg Close $131.20 Range $117.51 - $143.26

Q2 2018

Shares 1,074,514 Value ($000) $143,630 Avg Close $119.62 Range $102.58 - $133.88

Q1 2018

Shares 1,163,975 Value ($000) $134,753 Avg Close $111.03 Range $96.61 - $119.53

Q4 2017

Shares 1,205,326 Value ($000) $135,430 Avg Close $108.54 Range $98.18 - $118.56

Q3 2017

Shares 1,210,304 Value ($000) $128,958 Avg Close $94.77 Range $87.95 - $100.67

Q2 2017

Shares 1,162,553 Value ($000) $112,070 Avg Close $88.76 Range $82.13 - $96.78

Q1 2017

Shares 585,305 Value ($000) $53,907 Avg Close $82.35 Range $76.05 - $87.81

Q4 2016

Shares 609,697 Value ($000) $49,952 Avg Close $74.44 Range $69.57 - $81.67

Q3 2016

Shares 628,433 Value ($000) $50,589 Avg Close $68.33 Range $60.21 - $75.04

Q2 2016

Shares 679,730 Value ($000) $46,439 Avg Close $60.38 Range $55.33 - $65.50

Q1 2016

Shares 724,388 Value ($000) $46,100 Avg Close $54.76 Range $50.58 - $59.11

Q4 2015

Shares 725,274 Value ($000) $46,207 Avg Close $56.88 Range $45.12 - $63.43

Q3 2015

Shares 753,243 Value ($000) $38,566 Avg Close $45.23 Range $37.18 - $48.10

Q2 2015

Shares 923,439 Value ($000) $46,828 Avg Close $48.11 Range $44.76 - $50.50

Q1 2015

Shares 943,173 Value ($000) $49,658 Avg Close $45.64 Range $40.76 - $50.87

Q4 2014

Shares 1,043,253 Value ($000) $51,891 Avg Close $40.54 Range $30.68 - $45.83

Q3 2014

Shares 1,296,988 Value ($000) $57,132 Avg Close $39.57 Range $36.40 - $43.40

Q2 2014

Shares 1,305,455 Value ($000) $55,286 Avg Close $34.76 Range $31.35 - $38.50

Q1 2014

Shares 1,394,729 Value ($000) $54,074 Avg Close $31.60 Range $27.60 - $35.10

Q4 2013

Shares 1,600,322 Value ($000) $55,467 Avg Close $28.65 Range $24.43 - $31.16

Q3 2013

Shares 1,855,856 Value ($000) $56,195 Avg Close $25.18 Range $21.26 - $28.18

Q2 2013

Shares 1,970,166 Value ($000) $47,501 Avg Close $21.28 Range $18.50 - $22.86

Period	Shares	Value ($000)	Average Close	Price Range
Q4 2025	84,118	$76,241	$960.73	$831.77 - $1121.48
Q3 2025	163,916	$150,908	$808.07	$684.50 - $934.81
Q2 2025	132,843	$97,159	$633.58	$436.42 - $750.80
Q1 2025	128,722	$74,656	$624.99	$550.94 - $718.03
Q4 2024	149,453	$88,431	$716.72	$541.09 - $944.19
Q3 2024	142,716	$131,941	$853.35	$721.11 - $948.49
Q2 2024	127,448	$104,721	$712.18	$577.26 - $845.04
Q1 2024	136,149	$92,230	$657.62	$552.66 - $766.48
Q4 2023	196,025	$123,648	$513.84	$385.61 - $636.41
Q3 2023	180,762	$83,512	$501.94	$430.22 - $584.79
Q2 2023	228,609	$123,501	$465.29	$375.28 - $542.22
Q1 2023	141,962	$71,058	$449.31	$331.60 - $518.64
Q4 2022	137,762	$48,714	$350.38	$294.21 - $405.83
Q3 2022	98,605	$35,833	$432.95	$338.72 - $526.93
Q2 2022	102,170	$39,237	$410.37	$365.38 - $475.87
Q1 2022	22,474	$10,915	$422.77	$340.68 - $499.27
Q4 2021	22,552	$11,126	$500.08	$444.81 - $561.94
Q3 2021	27,754	$13,452	$440.15	$351.70 - $504.81
Q2 2021	41,563	$15,522	$340.03	$291.31 - $382.48
Q1 2021	35,705	$12,611	$351.26	$290.78 - $392.28
Q4 2020	52,465	$19,214	$308.64	$261.69 - $353.99
Q3 2020	265,449	$74,222	$250.15	$223.49 - $273.49
Q2 2020	362,465	$85,904	$194.18	$144.85 - $229.19
Q1 2020	456,990	$76,528	$163.85	$124.42 - $184.64
Q4 2019	590,008	$105,033	$152.39	$125.11 - $175.03
Q3 2019	701,685	$109,203	$142.31	$127.77 - $155.32
Q2 2019	711,531	$96,612	$129.05	$108.95 - $152.95
Q1 2019	845,142	$114,508	$124.16	$101.64 - $137.81
Q4 2018	816,184	$94,881	$112.91	$96.22 - $130.06
Q3 2018	1,025,467	$128,727	$131.20	$117.51 - $143.26
Q2 2018	1,074,514	$143,630	$119.62	$102.58 - $133.88
Q1 2018	1,163,975	$134,753	$111.03	$96.61 - $119.53
Q4 2017	1,205,326	$135,430	$108.54	$98.18 - $118.56
Q3 2017	1,210,304	$128,958	$94.77	$87.95 - $100.67
Q2 2017	1,162,553	$112,070	$88.76	$82.13 - $96.78
Q1 2017	585,305	$53,907	$82.35	$76.05 - $87.81
Q4 2016	609,697	$49,952	$74.44	$69.57 - $81.67
Q3 2016	628,433	$50,589	$68.33	$60.21 - $75.04
Q2 2016	679,730	$46,439	$60.38	$55.33 - $65.50
Q1 2016	724,388	$46,100	$54.76	$50.58 - $59.11
Q4 2015	725,274	$46,207	$56.88	$45.12 - $63.43
Q3 2015	753,243	$38,566	$45.23	$37.18 - $48.10
Q2 2015	923,439	$46,828	$48.11	$44.76 - $50.50
Q1 2015	943,173	$49,658	$45.64	$40.76 - $50.87
Q4 2014	1,043,253	$51,891	$40.54	$30.68 - $45.83
Q3 2014	1,296,988	$57,132	$39.57	$36.40 - $43.40
Q2 2014	1,305,455	$55,286	$34.76	$31.35 - $38.50
Q1 2014	1,394,729	$54,074	$31.60	$27.60 - $35.10
Q4 2013	1,600,322	$55,467	$28.65	$24.43 - $31.16
Q3 2013	1,855,856	$56,195	$25.18	$21.26 - $28.18
Q2 2013	1,970,166	$47,501	$21.28	$18.50 - $22.86