MONOLITHIC PWR SYS INC

Ticker: MPWR CUSIP: 609839105 Class: COM

UBS ASSET MANAGEMENT AMERICAS INC's Holding History (CIK: 0000861177)

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

Q4 2025

Shares 318,797 Value ($000) $288,945 Avg Close $960.73 Range $831.77 - $1121.48

Q3 2025

Shares 315,922 Value ($000) $290,850 Avg Close $808.07 Range $684.50 - $934.81

Q2 2025

Shares 323,293 Value ($000) $236,450 Avg Close $633.58 Range $436.42 - $750.80

Q1 2025

Shares 294,091 Value ($000) $170,567 Avg Close $624.99 Range $550.94 - $718.03

Q4 2024

Shares 279,650 Value ($000) $165,469 Avg Close $716.72 Range $541.09 - $944.19

Q3 2024

Shares 232,051 Value ($000) $214,531 Avg Close $853.35 Range $721.11 - $948.49

Q2 2024

Shares 236,407 Value ($000) $194,251 Avg Close $712.18 Range $577.26 - $845.04

Q1 2024

Shares 199,469 Value ($000) $135,124 Avg Close $657.62 Range $552.66 - $766.48

Q4 2023

Shares 190,752 Value ($000) $120,323 Avg Close $513.84 Range $385.61 - $636.41

Q3 2023

Shares 184,717 Value ($000) $85,339 Avg Close $501.94 Range $430.22 - $584.79

Q2 2023

Shares 169,193 Value ($000) $84,688 Avg Close $465.29 Range $375.28 - $542.22

Q1 2023

Shares 169,193 Value ($000) $84,688 Avg Close $449.31 Range $331.60 - $518.64

Q4 2022

Shares 176,794 Value ($000) $62,516 Avg Close $350.38 Range $294.21 - $405.83

Q3 2022

Shares 184,976 Value ($000) $67,220,279 Avg Close $432.95 Range $338.72 - $526.93

Q2 2022

Shares 174,630 Value ($000) $67,064,905 Avg Close $410.37 Range $365.38 - $475.87

Q1 2022

Shares 151,513 Value ($000) $73,586,834 Avg Close $422.77 Range $340.68 - $499.27

Q4 2021

Shares 223,045 Value ($000) $110,034,788 Avg Close $500.08 Range $444.81 - $561.94

Q3 2021

Shares 258,420 Value ($000) $125,251,006 Avg Close $440.15 Range $351.70 - $504.81

Q2 2021

Shares 147,882 Value ($000) $55,226,532 Avg Close $340.03 Range $291.31 - $382.48

Q1 2021

Shares 187,391 Value ($000) $66,188,377 Avg Close $351.26 Range $290.78 - $392.28

Q4 2020

Shares 174,810 Value ($000) $64,020,666 Avg Close $308.64 Range $261.69 - $353.99

Q3 2020

Shares 108,218 Value ($000) $30,258,833 Avg Close $250.15 Range $223.49 - $273.49

Q2 2020

Shares 106,605 Value ($000) $25,265,385 Avg Close $194.18 Range $144.85 - $229.19

Q1 2020

Shares 113,314 Value ($000) $18,975,563 Avg Close $163.85 Range $124.42 - $184.64

Q4 2019

Shares 157,625 Value ($000) $28,060,401 Avg Close $152.39 Range $125.11 - $175.03

Q3 2019

Shares 337,036 Value ($000) $52,452,914 Avg Close $142.31 Range $127.77 - $155.32

Q2 2019

Shares 320,507 Value ($000) $43,518,440 Avg Close $129.05 Range $108.95 - $152.95

Q1 2019

Shares 119,947 Value ($000) $16,251,620 Avg Close $124.16 Range $101.64 - $137.81

Q4 2018

Shares 116,620 Value ($000) $13,557,077 Avg Close $112.91 Range $96.22 - $130.06

Q3 2018

Shares 124,115 Value ($000) $15,580,156 Avg Close $131.20 Range $117.51 - $143.26

Q2 2018

Shares 118,562 Value ($000) $15,848,183 Avg Close $119.62 Range $102.58 - $133.88

Q1 2018

Shares 112,718 Value ($000) $13,049,362 Avg Close $111.03 Range $96.61 - $119.53

Q4 2017

Shares 113,911 Value ($000) $12,799,041 Avg Close $108.54 Range $98.18 - $118.56

Q3 2017

Shares 116,992 Value ($000) $12,465,499 Avg Close $94.77 Range $87.95 - $100.67

Q2 2017

Shares 118,811 Value ($000) $11,453,379 Avg Close $88.76 Range $82.13 - $96.78

Q1 2017

Shares 22,383 Value ($000) $2,061,475 Avg Close $82.35 Range $76.05 - $87.81

Q4 2016

Shares 18,444 Value ($000) $1,511 Avg Close $74.44 Range $69.57 - $81.67

Q3 2016

Shares 27,460 Value ($000) $2,210 Avg Close $68.33 Range $60.21 - $75.04

Q2 2016

Shares 23,863 Value ($000) $1,630 Avg Close $60.38 Range $55.33 - $65.50

Q1 2016

Shares 23,863 Value ($000) $1,518 Avg Close $54.76 Range $50.58 - $59.11

Q4 2015

Shares 28,753 Value ($000) $1,831 Avg Close $56.88 Range $45.12 - $63.43

Q3 2015

Shares 24,689 Value ($000) $1,264 Avg Close $45.23 Range $37.18 - $48.10

Q2 2015

Shares 19,989 Value ($000) $1,014 Avg Close $48.11 Range $44.76 - $50.50

Q1 2015

Shares 18,289 Value ($000) $963 Avg Close $45.64 Range $40.76 - $50.87

Q4 2014

Shares 17,689 Value ($000) $880 Avg Close $40.54 Range $30.68 - $45.83

Q3 2014

Shares 16,789 Value ($000) $740 Avg Close $39.57 Range $36.40 - $43.40

Q2 2014

Shares 16,789 Value ($000) $711 Avg Close $34.76 Range $31.35 - $38.50

Q1 2014

Shares 15,989 Value ($000) $620 Avg Close $31.60 Range $27.60 - $35.10

Q4 2013

Shares 12,600 Value ($000) $437 Avg Close $28.65 Range $24.43 - $31.16

Q3 2013

Shares 12,600 Value ($000) $382 Avg Close $25.18 Range $21.26 - $28.18

Q2 2013

Shares 12,600 Value ($000) $304 Avg Close $21.28 Range $18.50 - $22.86

Period	Shares	Value ($000)	Average Close	Price Range
Q4 2025	318,797	$288,945	$960.73	$831.77 - $1121.48
Q3 2025	315,922	$290,850	$808.07	$684.50 - $934.81
Q2 2025	323,293	$236,450	$633.58	$436.42 - $750.80
Q1 2025	294,091	$170,567	$624.99	$550.94 - $718.03
Q4 2024	279,650	$165,469	$716.72	$541.09 - $944.19
Q3 2024	232,051	$214,531	$853.35	$721.11 - $948.49
Q2 2024	236,407	$194,251	$712.18	$577.26 - $845.04
Q1 2024	199,469	$135,124	$657.62	$552.66 - $766.48
Q4 2023	190,752	$120,323	$513.84	$385.61 - $636.41
Q3 2023	184,717	$85,339	$501.94	$430.22 - $584.79
Q2 2023	169,193	$84,688	$465.29	$375.28 - $542.22
Q1 2023	169,193	$84,688	$449.31	$331.60 - $518.64
Q4 2022	176,794	$62,516	$350.38	$294.21 - $405.83
Q3 2022	184,976	$67,220,279	$432.95	$338.72 - $526.93
Q2 2022	174,630	$67,064,905	$410.37	$365.38 - $475.87
Q1 2022	151,513	$73,586,834	$422.77	$340.68 - $499.27
Q4 2021	223,045	$110,034,788	$500.08	$444.81 - $561.94
Q3 2021	258,420	$125,251,006	$440.15	$351.70 - $504.81
Q2 2021	147,882	$55,226,532	$340.03	$291.31 - $382.48
Q1 2021	187,391	$66,188,377	$351.26	$290.78 - $392.28
Q4 2020	174,810	$64,020,666	$308.64	$261.69 - $353.99
Q3 2020	108,218	$30,258,833	$250.15	$223.49 - $273.49
Q2 2020	106,605	$25,265,385	$194.18	$144.85 - $229.19
Q1 2020	113,314	$18,975,563	$163.85	$124.42 - $184.64
Q4 2019	157,625	$28,060,401	$152.39	$125.11 - $175.03
Q3 2019	337,036	$52,452,914	$142.31	$127.77 - $155.32
Q2 2019	320,507	$43,518,440	$129.05	$108.95 - $152.95
Q1 2019	119,947	$16,251,620	$124.16	$101.64 - $137.81
Q4 2018	116,620	$13,557,077	$112.91	$96.22 - $130.06
Q3 2018	124,115	$15,580,156	$131.20	$117.51 - $143.26
Q2 2018	118,562	$15,848,183	$119.62	$102.58 - $133.88
Q1 2018	112,718	$13,049,362	$111.03	$96.61 - $119.53
Q4 2017	113,911	$12,799,041	$108.54	$98.18 - $118.56
Q3 2017	116,992	$12,465,499	$94.77	$87.95 - $100.67
Q2 2017	118,811	$11,453,379	$88.76	$82.13 - $96.78
Q1 2017	22,383	$2,061,475	$82.35	$76.05 - $87.81
Q4 2016	18,444	$1,511	$74.44	$69.57 - $81.67
Q3 2016	27,460	$2,210	$68.33	$60.21 - $75.04
Q2 2016	23,863	$1,630	$60.38	$55.33 - $65.50
Q1 2016	23,863	$1,518	$54.76	$50.58 - $59.11
Q4 2015	28,753	$1,831	$56.88	$45.12 - $63.43
Q3 2015	24,689	$1,264	$45.23	$37.18 - $48.10
Q2 2015	19,989	$1,014	$48.11	$44.76 - $50.50
Q1 2015	18,289	$963	$45.64	$40.76 - $50.87
Q4 2014	17,689	$880	$40.54	$30.68 - $45.83
Q3 2014	16,789	$740	$39.57	$36.40 - $43.40
Q2 2014	16,789	$711	$34.76	$31.35 - $38.50
Q1 2014	15,989	$620	$31.60	$27.60 - $35.10
Q4 2013	12,600	$437	$28.65	$24.43 - $31.16
Q3 2013	12,600	$382	$25.18	$21.26 - $28.18
Q2 2013	12,600	$304	$21.28	$18.50 - $22.86