MONOLITHIC PWR SYS INC

Ticker: MPWR CUSIP: 609839105 Class: COM

WHITTIER TRUST CO's Holding History (CIK: 0001137881)

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

Q4 2025

Shares 44,252 Value ($000) $44,490 Avg Close $960.73 Range $831.77 - $1121.48

Q3 2025

Shares 44,201 Value ($000) $40,613 Avg Close $808.07 Range $684.50 - $934.81

Q2 2025

Shares 43,523 Value ($000) $31,832 Avg Close $633.58 Range $436.42 - $750.80

Q1 2025

Shares 42,486 Value ($000) $24,640 Avg Close $624.99 Range $550.94 - $718.03

Q4 2024

Shares 41,532 Value ($000) $24,574 Avg Close $716.72 Range $541.09 - $944.19

Q3 2024

Shares 40,290 Value ($000) $37,248 Avg Close $853.35 Range $721.11 - $948.49

Q2 2024

Shares 38,884 Value ($000) $31,950 Avg Close $712.18 Range $577.26 - $845.04

Q1 2024

Shares 37,091 Value ($000) $25,126 Avg Close $657.62 Range $552.66 - $766.48

Q4 2023

Shares 35,820 Value ($000) $22,594 Avg Close $513.84 Range $385.61 - $636.41

Q3 2023

Shares 38,787 Value ($000) $17,920 Avg Close $501.94 Range $430.22 - $584.79

Q2 2023

Shares 37,941 Value ($000) $20,496 Avg Close $465.29 Range $375.28 - $542.22

Q1 2023

Shares 42,599 Value ($000) $21,322 Avg Close $449.31 Range $331.60 - $518.64

Q4 2022

Shares 39,092 Value ($000) $13,823 Avg Close $350.38 Range $294.21 - $405.83

Q3 2022

Shares 48,701 Value ($000) $17,697 Avg Close $432.95 Range $338.72 - $526.93

Q2 2022

Shares 46,710 Value ($000) $17,937 Avg Close $410.37 Range $365.38 - $475.87

Q1 2022

Shares 46,204 Value ($000) $22,440 Avg Close $422.77 Range $340.68 - $499.27

Q4 2021

Shares 44,323 Value ($000) $21,866 Avg Close $500.08 Range $444.81 - $561.94

Q3 2021

Shares 49,407 Value ($000) $23,946 Avg Close $440.15 Range $351.70 - $504.81

Q2 2021

Shares 49,932 Value ($000) $18,647 Avg Close $340.03 Range $291.31 - $382.48

Q1 2021

Shares 47,126 Value ($000) $16,645 Avg Close $351.26 Range $290.78 - $392.28

Q4 2020

Shares 43,883 Value ($000) $16,071 Avg Close $308.64 Range $261.69 - $353.99

Q3 2020

Shares 57,383 Value ($000) $16,045 Avg Close $250.15 Range $223.49 - $273.49

Q2 2020

Shares 56,864 Value ($000) $13,477 Avg Close $194.18 Range $144.85 - $229.19

Q1 2020

Shares 57,749 Value ($000) $9,671 Avg Close $163.85 Range $124.42 - $184.64

Q4 2019

Shares 54,818 Value ($000) $9,759 Avg Close $152.39 Range $125.11 - $175.03

Q3 2019

Shares 53,549 Value ($000) $8,334 Avg Close $142.31 Range $127.77 - $155.32

Q2 2019

Shares 52,988 Value ($000) $7,195 Avg Close $129.05 Range $108.95 - $152.95

Q1 2019

Shares 50,790 Value ($000) $6,882 Avg Close $124.16 Range $101.64 - $137.81

Q4 2018

Shares 48,163 Value ($000) $5,599 Avg Close $112.91 Range $96.22 - $130.06

Q3 2018

Shares 45,479 Value ($000) $5,709 Avg Close $131.20 Range $117.51 - $143.26

Q2 2018

Shares 45,292 Value ($000) $6,055 Avg Close $119.62 Range $102.58 - $133.88

Q1 2018

Shares 42,602 Value ($000) $4,932 Avg Close $111.03 Range $96.61 - $119.53

Q4 2017

Shares 42,019 Value ($000) $4,721 Avg Close $108.54 Range $98.18 - $118.56

Q3 2017

Shares 41,262 Value ($000) $4,396 Avg Close $94.77 Range $87.95 - $100.67

Q2 2017

Shares 40,678 Value ($000) $3,921 Avg Close $88.76 Range $82.13 - $96.78

Q1 2017

Shares 39,546 Value ($000) $3,642 Avg Close $82.35 Range $76.05 - $87.81

Q4 2016

Shares 37,746 Value ($000) $3,093 Avg Close $74.44 Range $69.57 - $81.67

Q3 2016

Shares 37,538 Value ($000) $3,022 Avg Close $68.33 Range $60.21 - $75.04

Q2 2016

Shares 37,461 Value ($000) $2,559 Avg Close $60.38 Range $55.33 - $65.50

Q1 2016

Shares 37,008 Value ($000) $2,355 Avg Close $54.76 Range $50.58 - $59.11

Q4 2015

Shares 37,008 Value ($000) $2,357 Avg Close $56.88 Range $45.12 - $63.43

Q3 2015

Shares 43,530 Value ($000) $2,229 Avg Close $45.23 Range $37.18 - $48.10

Q2 2015

Shares 43,530 Value ($000) $2,207 Avg Close $48.11 Range $44.76 - $50.50

Q1 2015

Shares 43,530 Value ($000) $2,292 Avg Close $45.64 Range $40.76 - $50.87

Q4 2014

Shares 43,530 Value ($000) $2,165 Avg Close $40.54 Range $30.68 - $45.83

Q3 2014

Shares 43,530 Value ($000) $1,917 Avg Close $39.57 Range $36.40 - $43.40

Q2 2014

Shares 43,530 Value ($000) $1,843 Avg Close $34.76 Range $31.35 - $38.50

Q1 2014

Shares 43,530 Value ($000) $1,688 Avg Close $31.60 Range $27.60 - $35.10

Q4 2013

Shares 43,530 Value ($000) $1,508 Avg Close $28.65 Range $24.43 - $31.16

Q3 2013

Shares 43,530 Value ($000) $1,318 Avg Close $25.18 Range $21.26 - $28.18

Q2 2013

Shares 43,530 Value ($000) $1,050 Avg Close $21.28 Range $18.50 - $22.86

Period	Shares	Value ($000)	Average Close	Price Range
Q4 2025	44,252	$44,490	$960.73	$831.77 - $1121.48
Q3 2025	44,201	$40,613	$808.07	$684.50 - $934.81
Q2 2025	43,523	$31,832	$633.58	$436.42 - $750.80
Q1 2025	42,486	$24,640	$624.99	$550.94 - $718.03
Q4 2024	41,532	$24,574	$716.72	$541.09 - $944.19
Q3 2024	40,290	$37,248	$853.35	$721.11 - $948.49
Q2 2024	38,884	$31,950	$712.18	$577.26 - $845.04
Q1 2024	37,091	$25,126	$657.62	$552.66 - $766.48
Q4 2023	35,820	$22,594	$513.84	$385.61 - $636.41
Q3 2023	38,787	$17,920	$501.94	$430.22 - $584.79
Q2 2023	37,941	$20,496	$465.29	$375.28 - $542.22
Q1 2023	42,599	$21,322	$449.31	$331.60 - $518.64
Q4 2022	39,092	$13,823	$350.38	$294.21 - $405.83
Q3 2022	48,701	$17,697	$432.95	$338.72 - $526.93
Q2 2022	46,710	$17,937	$410.37	$365.38 - $475.87
Q1 2022	46,204	$22,440	$422.77	$340.68 - $499.27
Q4 2021	44,323	$21,866	$500.08	$444.81 - $561.94
Q3 2021	49,407	$23,946	$440.15	$351.70 - $504.81
Q2 2021	49,932	$18,647	$340.03	$291.31 - $382.48
Q1 2021	47,126	$16,645	$351.26	$290.78 - $392.28
Q4 2020	43,883	$16,071	$308.64	$261.69 - $353.99
Q3 2020	57,383	$16,045	$250.15	$223.49 - $273.49
Q2 2020	56,864	$13,477	$194.18	$144.85 - $229.19
Q1 2020	57,749	$9,671	$163.85	$124.42 - $184.64
Q4 2019	54,818	$9,759	$152.39	$125.11 - $175.03
Q3 2019	53,549	$8,334	$142.31	$127.77 - $155.32
Q2 2019	52,988	$7,195	$129.05	$108.95 - $152.95
Q1 2019	50,790	$6,882	$124.16	$101.64 - $137.81
Q4 2018	48,163	$5,599	$112.91	$96.22 - $130.06
Q3 2018	45,479	$5,709	$131.20	$117.51 - $143.26
Q2 2018	45,292	$6,055	$119.62	$102.58 - $133.88
Q1 2018	42,602	$4,932	$111.03	$96.61 - $119.53
Q4 2017	42,019	$4,721	$108.54	$98.18 - $118.56
Q3 2017	41,262	$4,396	$94.77	$87.95 - $100.67
Q2 2017	40,678	$3,921	$88.76	$82.13 - $96.78
Q1 2017	39,546	$3,642	$82.35	$76.05 - $87.81
Q4 2016	37,746	$3,093	$74.44	$69.57 - $81.67
Q3 2016	37,538	$3,022	$68.33	$60.21 - $75.04
Q2 2016	37,461	$2,559	$60.38	$55.33 - $65.50
Q1 2016	37,008	$2,355	$54.76	$50.58 - $59.11
Q4 2015	37,008	$2,357	$56.88	$45.12 - $63.43
Q3 2015	43,530	$2,229	$45.23	$37.18 - $48.10
Q2 2015	43,530	$2,207	$48.11	$44.76 - $50.50
Q1 2015	43,530	$2,292	$45.64	$40.76 - $50.87
Q4 2014	43,530	$2,165	$40.54	$30.68 - $45.83
Q3 2014	43,530	$1,917	$39.57	$36.40 - $43.40
Q2 2014	43,530	$1,843	$34.76	$31.35 - $38.50
Q1 2014	43,530	$1,688	$31.60	$27.60 - $35.10
Q4 2013	43,530	$1,508	$28.65	$24.43 - $31.16
Q3 2013	43,530	$1,318	$25.18	$21.26 - $28.18
Q2 2013	43,530	$1,050	$21.28	$18.50 - $22.86