Oppenheimer Asset Management Inc. Monolithic Power Systems Inc Transaction History

Oppenheimer Asset Management Inc.

$8.74 Billion
Q3 2025

A detailed history of Oppenheimer Asset Management Inc. transactions in Monolithic Power Systems Inc stock. As of the latest transaction made, Oppenheimer Asset Management Inc. holds 2,036 shares of MPWR stock, worth $1.87 Million. This represents 0.02% of its overall portfolio holdings.

Number of Shares

2,036

Previous 2,129 4.37%

Holding current value

$1.87 Million

Previous $1.56 Million 20.36%

% of portfolio

0.02%

Previous 0.02%

32 transactions

Quarter	Operation	Price Per share	shares change	shares Held
Q3 2025 Nov 05, 2025	SELL	$711.24 - $922.81 $66,145 - $85,821	-93 Reduced 4.37%	2,036 $1.87 Million
Q2 2025 Jul 31, 2025	BUY	$455.19 - $737.73 $134,736 - $218,368	296 Added 16.15%	2,129 $1.56 Million
Q1 2025 Apr 22, 2025	SELL	$565.7 - $720.25 $120,494 - $153,413	-213 Reduced 10.41%	1,833 $1.06 Million
Q4 2024 Feb 04, 2025	SELL	$560.06 - $942.58 $66,647 - $112,167	-119 Reduced 5.5%	2,046 $1.21 Million
Q3 2024 Nov 05, 2024	SELL	$757.04 - $947.16 $1.05 Million - $1.31 Million	-1,386 Reduced 39.03%	2,165 $2 Million

Q2 2024 Aug 08, 2024	BUY	$591.52 - $852.56 $138,415 - $199,499	234 Added 7.05%	3,551 $2.92 Million
Q1 2024 May 06, 2024	SELL	$571.06 - $767.6 $1.68 Million - $2.26 Million	-2,945 Reduced 47.03%	3,317 $2.25 Million
Q4 2023 Feb 13, 2024	SELL	$399.73 - $637.39 $131,111 - $209,063	-328 Reduced 4.98%	6,262 $3.95 Million
Q3 2023 Nov 07, 2023	SELL	$440.38 - $588.72 $20,697 - $27,669	-47 Reduced 0.71%	6,590 $3.04 Million
Q2 2023 Aug 02, 2023	BUY	$398.61 - $540.23 $88,491 - $119,931	222 Added 3.46%	6,637 $3.59 Million
Q1 2023 May 10, 2023	SELL	$342.95 - $530.09 $337,119 - $521,078	-983 Reduced 13.29%	6,415 $3.21 Million
Q4 2022 Feb 06, 2023	SELL	$309.2 - $405.03 $693,226 - $908,077	-2,242 Reduced 23.26%	7,398 $2.62 Million
Q3 2022 Nov 14, 2022	SELL	$363.4 - $536.88 $199,143 - $294,210	-548 Reduced 5.38%	9,640 $3.5 Million
Q2 2022 Aug 08, 2022	SELL	$384.04 - $479.19 $421,291 - $525,671	-1,097 Reduced 9.72%	10,188 $3.91 Million
Q1 2022 May 12, 2022	SELL	$361.12 - $512.21 $305,146 - $432,817	-845 Reduced 6.97%	11,285 $5.48 Million
Q4 2021 Feb 02, 2022	SELL	$460.83 - $575.97 $1 Million - $1.25 Million	-2,178 Reduced 15.22%	12,130 $5.98 Million
Q3 2021 Nov 12, 2021	SELL	$370.18 - $517.92 $567,856 - $794,489	-1,534 Reduced 9.68%	14,308 $6.94 Million
Q2 2021 Aug 03, 2021	BUY	$306.1 - $389.53 $19,284 - $24,540	63 Added 0.4%	15,842 $5.92 Million
Q1 2021 May 17, 2021	BUY	$302.05 - $403.18 $28,694 - $38,302	95 Added 0.61%	15,779 $5.57 Million
Q4 2020 Feb 11, 2021	SELL	$272.37 - $366.23 $1.36 Million - $1.83 Million	-5,006 Reduced 24.2%	15,684 $5.74 Million
Q3 2020 Nov 13, 2020	SELL	$235.55 - $282.85 $88,331 - $106,068	-375 Reduced 1.78%	20,690 $5.78 Million
Q2 2020 Aug 11, 2020	SELL	$153.42 - $237.0 $713,709 - $1.1 Million	-4,652 Reduced 18.09%	21,065 $4.99 Million
Q1 2020 May 08, 2020	BUY	$135.22 - $191.43 $27,990 - $39,626	207 Added 0.81%	25,717 $4.31 Million
Q4 2019 Feb 07, 2020	BUY	$135.15 - $182.89 $14,461 - $19,569	107 Added 0.42%	25,510 $4.54 Million
Q3 2019 Oct 31, 2019	BUY	$136.01 - $161.55 $3,944 - $4,684	29 Added 0.11%	25,403 $3.95 Million
Q2 2019 Aug 09, 2019	SELL	$116.45 - $157.53 $47,977 - $64,902	-412 Reduced 1.6%	25,374 $3.45 Million
Q1 2019 Apr 24, 2019	SELL	$108.61 - $145.01 $30,628 - $40,892	-282 Reduced 1.08%	25,786 $3.49 Million
Q4 2018 Jan 30, 2019	SELL	$104.17 - $134.73 $110,316 - $142,679	-1,059 Reduced 3.9%	26,068 $3.03 Million
Q3 2018 Oct 26, 2018	BUY	$125.53 - $151.38 $85,485 - $103,089	681 Added 2.58%	27,127 $3.41 Million
Q2 2018 Aug 10, 2018	BUY	$110.8 - $141.63 $2,880 - $3,682	26 Added 0.1%	26,446 $3.54 Million
Q1 2018 May 09, 2018	SELL	$103.82 - $125.51 $1.13 Million - $1.37 Million	-10,910 Reduced 29.23%	26,420 $3.06 Million
Q3 2017 Nov 14, 2017	BUY	$95.87 - $106.55 $3.58 Million - $3.98 Million	37,330	37,330 $3.98 Million

Others Institutions Holding MPWR

# of Institutions

1,104

Shares Held

66.6M

Call Options Held

391K

Put Options Held

403K

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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Oppenheimer Asset Management Inc. Monolithic Power Systems Inc Transaction History