Asset Management One Co., Ltd. Monolithic Power Systems Inc Transaction History

Asset Management One Co., Ltd.

$34.5 Billion
Q4 2025

A detailed history of Asset Management One Co., Ltd. transactions in Monolithic Power Systems Inc stock. As of the latest transaction made, Asset Management One Co., Ltd. holds 21,473 shares of MPWR stock, worth $19.8 Million. This represents 0.06% of its overall portfolio holdings.

Number of Shares

21,473

Previous 20,790 3.29%

Holding current value

$19.8 Million

Previous $19.1 Million 3.23%

% of portfolio

0.06%

Previous 0.06%

32 transactions

Quarter	Operation	Price Per share	shares change	shares Held
Q4 2025 Jan 27, 2026	BUY	$904.44 - $1105.05 $617,732 - $754,749	683 Added 3.29%	21,473 $19.8 Million
Q3 2025 Oct 22, 2025	SELL	$711.24 - $922.81 $482,220 - $625,665	-678 Reduced 3.16%	20,790 $19.1 Million
Q2 2025 Jul 31, 2025	BUY	$455.19 - $737.73 $325,005 - $526,739	714 Added 3.44%	21,468 $15.7 Million
Q1 2025 Apr 23, 2025	BUY	$565.7 - $720.25 $136,899 - $174,300	242 Added 1.18%	20,754 $12 Million
Q4 2024 Jan 30, 2025	BUY	$560.06 - $942.58 $579,102 - $974,627	1,034 Added 5.31%	20,512 $12.1 Million

Q3 2024 Oct 30, 2024	BUY	$757.04 - $947.16 $115,827 - $144,915	153 Added 0.79%	19,478 $18 Million
Q2 2024 Jul 18, 2024	SELL	$591.52 - $852.56 $78,672 - $113,390	-133 Reduced 0.68%	19,325 $15.9 Million
Q1 2024 May 02, 2024	BUY	$571.06 - $767.6 $111,927 - $150,449	196 Added 1.02%	19,458 $13.2 Million
Q4 2023 Jan 24, 2024	SELL	$399.73 - $637.39 $97,933 - $156,160	-245 Reduced 1.26%	19,262 $12.2 Million
Q3 2023 Oct 19, 2023	BUY	$440.38 - $588.72 $118,902 - $158,954	270 Added 1.4%	19,507 $9.01 Million
Q2 2023 Jul 31, 2023	SELL	$398.61 - $540.23 $705,938 - $956,747	-1,771 Reduced 8.43%	19,237 $10.4 Million
Q1 2023 Apr 25, 2023	SELL	$342.95 - $530.09 $231,148 - $357,280	-674 Reduced 3.11%	21,008 $10.5 Million
Q4 2022 Feb 06, 2023	SELL	$309.2 - $405.03 $632,932 - $829,096	-2,047 Reduced 8.63%	21,682 $7.67 Million
Q3 2022 Nov 04, 2022	SELL	$363.4 - $536.88 $731,524 - $1.08 Million	-2,013 Reduced 7.82%	23,729 $8.62 Million
Q2 2022 Jul 29, 2022	SELL	$384.04 - $479.19 $305,695 - $381,435	-796 Reduced 3.0%	25,742 $9.89 Million
Q1 2022 May 13, 2022	BUY	$361.12 - $512.21 $134,697 - $191,054	373 Added 1.43%	26,538 $12.9 Million
Q4 2021 Feb 09, 2022	BUY	$460.83 - $575.97 $967,282 - $1.21 Million	2,099 Added 8.72%	26,165 $13 Million
Q3 2021 Nov 02, 2021	BUY	$370.18 - $517.92 $166,951 - $233,581	451 Added 1.91%	24,066 $11.7 Million
Q2 2021 Aug 03, 2021	BUY	$306.1 - $389.53 $1.34 Million - $1.7 Million	4,373 Added 22.73%	23,615 $8.82 Million
Q1 2021 May 14, 2021	SELL	$302.05 - $403.18 $294,196 - $392,697	-974 Reduced 4.82%	19,242 $6.8 Million
Q4 2020 Feb 12, 2021	BUY	$272.37 - $366.23 $5.51 Million - $7.4 Million	20,216 New	20,216 $7.13 Million
Q1 2020 May 14, 2020	SELL	$135.22 - $191.43 $348,867 - $493,889	-2,580 Closed	0 $0
Q4 2019 Feb 14, 2020	SELL	$135.15 - $182.89 $266,245 - $360,293	-1,970 Reduced 43.3%	2,580 $459,000
Q3 2019 Nov 14, 2019	SELL	$136.01 - $161.55 $543,903 - $646,038	-3,999 Reduced 46.78%	4,550 $709,000
Q2 2019 Aug 14, 2019	SELL	$116.45 - $157.53 $451,709 - $611,058	-3,879 Reduced 31.21%	8,549 $1.16 Million
Q1 2019 May 15, 2019	SELL	$108.61 - $145.01 $483,097 - $645,004	-4,448 Reduced 26.36%	12,428 $1.68 Million
Q3 2018 Nov 14, 2018	SELL	$125.53 - $151.38 $1.71 Million - $2.07 Million	-13,651 Reduced 44.72%	16,876 $2.13 Million
Q2 2018 Aug 14, 2018	BUY	$110.8 - $141.63 $2.73 Million - $3.49 Million	24,638 Added 418.37%	30,527 $4.1 Million
Q1 2018 May 14, 2018	BUY	$103.82 - $125.51 $611,395 - $739,128	5,889 New	5,889 $682,000
Q4 2017 Feb 14, 2018	SELL	$107.55 - $126.64 $449,559 - $529,355	-4,180 Closed	0 $0
Q3 2017 Nov 14, 2017	BUY	$95.87 - $106.55 $43,237 - $48,054	451 Added 12.09%	4,180 $445,000
Q2 2017 Aug 14, 2017	BUY	N/A	3,729	3,729 $361,000

Others Institutions Holding MPWR

# of Institutions

1,109

Shares Held

66.6M

Call Options Held

391K

Put Options Held

412K

View Full List

About MONOLITHIC POWER SYSTEMS INC

Ticker MPWR
Exchange NASDAQ
Sector Technology
Industry Semiconductors
Shares Outstandng 46,941,000
Market Cap $43.2B
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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Asset Management One Co., Ltd. Monolithic Power Systems Inc Transaction History