Whittier Trust CO Monolithic Power Systems Inc Transaction History

Whittier Trust CO

$8.15 Billion
Q2 2025

A detailed history of Whittier Trust CO transactions in Monolithic Power Systems Inc stock. As of the latest transaction made, Whittier Trust CO holds 43,523 shares of MPWR stock, worth $36.6 Million. This represents 0.39% of its overall portfolio holdings.

Number of Shares

43,523

Previous 42,486 2.44%

Holding current value

$36.6 Million

Previous $24.6 Million 29.18%

% of portfolio

0.39%

Previous 0.35%

33 transactions

Quarter	Operation	Price Per share	shares change	shares Held
Q2 2025 Jul 30, 2025	BUY	$455.19 - $737.73 $472,032 - $765,026	1,037 Added 2.44%	43,523 $31.8 Million
Q1 2025 May 02, 2025	BUY	$565.7 - $720.25 $539,677 - $687,118	954 Added 2.3%	42,486 $24.6 Million
Q4 2024 Feb 11, 2025	BUY	$560.06 - $942.58 $695,594 - $1.17 Million	1,242 Added 3.08%	41,532 $24.6 Million
Q3 2024 Oct 21, 2024	BUY	$757.04 - $947.16 $1.06 Million - $1.33 Million	1,406 Added 3.62%	40,290 $37.3 Million
Q2 2024 Jul 26, 2024	BUY	$591.52 - $852.56 $1.06 Million - $1.53 Million	1,793 Added 4.83%	38,884 $32 Million
Q1 2024 May 02, 2024	BUY	$571.06 - $767.6 $725,817 - $975,619	1,271 Added 3.55%	37,091 $25.1 Million
Q4 2023 Jan 11, 2024	SELL	$399.73 - $637.39 $1.19 Million - $1.89 Million	-2,967 Reduced 7.65%	35,820 $22.6 Million
Q3 2023 Oct 27, 2023	BUY	$440.38 - $588.72 $372,561 - $498,057	846 Added 2.23%	38,787 $17.9 Million
Q2 2023 Jul 24, 2023	SELL	$398.61 - $540.23 $1.86 Million - $2.52 Million	-4,658 Reduced 10.93%	37,941 $20.5 Million
Q1 2023 Apr 21, 2023	BUY	$342.95 - $530.09 $1.2 Million - $1.86 Million	3,507 Added 8.97%	42,599 $21.3 Million
Q4 2022 Jan 25, 2023	SELL	$309.2 - $405.03 $2.97 Million - $3.89 Million	-9,609 Reduced 19.73%	39,092 $0
Q3 2022 Oct 21, 2022	BUY	$363.4 - $536.88 $723,529 - $1.07 Million	1,991 Added 4.26%	48,701 $17.7 Million
Q2 2022 Jul 28, 2022	BUY	$384.04 - $479.19 $194,324 - $242,470	506 Added 1.1%	46,710 $17.9 Million
Q1 2022 Apr 29, 2022	BUY	$361.12 - $512.21 $679,266 - $963,467	1,881 Added 4.24%	46,204 $22.4 Million
Q4 2021 Jan 19, 2022	SELL	$460.83 - $575.97 $2.34 Million - $2.93 Million	-5,084 Reduced 10.29%	44,323 $21.9 Million
Q3 2021 Nov 01, 2021	SELL	$370.18 - $517.92 $194,344 - $271,908	-525 Reduced 1.05%	49,407 $23.9 Million
Q2 2021 Jul 29, 2021	BUY	$306.1 - $389.53 $858,916 - $1.09 Million	2,806 Added 5.95%	49,932 $18.6 Million
Q1 2021 Apr 26, 2021	BUY	$302.05 - $403.18 $979,548 - $1.31 Million	3,243 Added 7.39%	47,126 $16.6 Million
Q4 2020 Jan 29, 2021	SELL	$272.37 - $366.23 $3.68 Million - $4.94 Million	-13,500 Reduced 23.53%	43,883 $16.1 Million
Q3 2020 Oct 30, 2020	BUY	$235.55 - $282.85 $122,250 - $146,799	519 Added 0.91%	57,383 $16 Million
Q2 2020 Jul 10, 2020	SELL	$153.42 - $237.0 $135,776 - $209,745	-885 Reduced 1.53%	56,864 $13.5 Million
Q1 2020 Apr 27, 2020	BUY	$135.22 - $191.43 $396,329 - $561,081	2,931 Added 5.35%	57,749 $9.67 Million
Q4 2019 Jan 31, 2020	BUY	$135.15 - $182.89 $171,505 - $232,087	1,269 Added 2.37%	54,818 $9.76 Million
Q3 2019 Oct 18, 2019	BUY	$136.01 - $161.55 $76,301 - $90,629	561 Added 1.06%	53,549 $8.33 Million
Q2 2019 Jul 23, 2019	BUY	$116.45 - $157.53 $255,957 - $346,250	2,198 Added 4.33%	52,988 $7.2 Million
Q1 2019 Apr 29, 2019	BUY	$108.61 - $145.01 $285,318 - $380,941	2,627 Added 5.45%	50,790 $6.88 Million
Q4 2018 Feb 07, 2019	BUY	$104.17 - $134.73 $279,592 - $361,615	2,684 Added 5.9%	48,163 $5.6 Million
Q3 2018 Oct 23, 2018	BUY	$125.53 - $151.38 $23,474 - $28,308	187 Added 0.41%	45,479 $5.71 Million
Q2 2018 Jul 27, 2018	BUY	$110.8 - $141.63 $195,229 - $249,552	1,762 Added 4.05%	45,292 $6.06 Million
Q2 2018 Jul 20, 2018	BUY	$110.8 - $141.63 $102,822 - $131,432	928 Added 2.18%	43,530 $1.84 Million
Q1 2018 May 01, 2018	BUY	$103.82 - $125.51 $60,527 - $73,172	583 Added 1.39%	42,602 $4.93 Million
Q4 2017 Feb 07, 2018	BUY	$107.55 - $126.64 $81,415 - $95,866	757 Added 1.83%	42,019 $4.72 Million
Q3 2017 Oct 23, 2017	BUY	$95.87 - $106.55 $3.96 Million - $4.4 Million	41,262	41,262 $4.4 Million

Others Institutions Holding MPWR

# of Institutions

996

Shares Held

43.4M

Call Options Held

414K

Put Options Held

480K

View Full List

About MONOLITHIC POWER SYSTEMS INC

Ticker MPWR
Exchange NASDAQ
Sector Technology
Industry Semiconductors
Shares Outstandng 46,941,000
Market Cap $39.5B
Description
Monolithic Power Systems, Inc. engages in the design, development, marketing, and sale of semiconductor-based power electronics solutions for the computing and storage, automotive, industrial, communications, and consumer markets. The company provides direct current (DC) to DC integrated circuits (ICs) that are used to convert and control voltag...

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Whittier Trust CO Monolithic Power Systems Inc Transaction History