Blair William & CO Monolithic Power Systems Inc Transaction History

Blair William & CO

$36.3 Billion
Q3 2025

A detailed history of Blair William & CO transactions in Monolithic Power Systems Inc stock. As of the latest transaction made, Blair William & CO holds 10,182 shares of MPWR stock, worth $9.37 Million. This represents 0.03% of its overall portfolio holdings.

Number of Shares

10,182

Previous 8,987 13.3%

Holding current value

$9.37 Million

Previous $6.57 Million 42.62%

% of portfolio

0.03%

Previous 0.02%

33 transactions

Quarter	Operation	Price Per share	shares change	shares Held
Q3 2025 Nov 12, 2025	BUY	$711.24 - $922.81 $849,931 - $1.1 Million	1,195 Added 13.3%	10,182 $9.37 Million
Q2 2025 Jul 24, 2025	SELL	$455.19 - $737.73 $237,153 - $384,357	-521 Reduced 5.48%	8,987 $6.57 Million
Q1 2025 May 09, 2025	SELL	$565.7 - $720.25 $1.05 Million - $1.33 Million	-1,850 Reduced 16.29%	9,508 $5.51 Million
Q4 2024 Feb 12, 2025	BUY	$560.06 - $942.58 $985,145 - $1.66 Million	1,759 Added 18.32%	11,358 $6.72 Million
Q3 2024 Nov 12, 2024	BUY	$757.04 - $947.16 $757 - $947	1 Added 0.01%	9,599 $8.88 Million

Q2 2024 Aug 12, 2024	BUY	$591.52 - $852.56 $66,841 - $96,339	113 Added 1.19%	9,598 $7.89 Million
Q1 2024 May 09, 2024	SELL	$571.06 - $767.6 $1.14 Million - $1.53 Million	-1,990 Reduced 17.34%	9,485 $6.43 Million
Q4 2023 Feb 12, 2024	SELL	$399.73 - $637.39 $13,191 - $21,033	-33 Reduced 0.29%	11,475 $7.24 Million
Q3 2023 Nov 09, 2023	SELL	$440.38 - $588.72 $4.57 Million - $6.1 Million	-10,369 Reduced 47.4%	11,508 $5.32 Million
Q2 2023 Aug 11, 2023	SELL	$398.61 - $540.23 $591,935 - $802,241	-1,485 Reduced 6.36%	21,877 $11.8 Million
Q1 2023 May 12, 2023	BUY	$342.95 - $530.09 $22,977 - $35,516	67 Added 0.29%	23,362 $11.7 Million
Q4 2022 Feb 10, 2023	BUY	$309.2 - $405.03 $1.05 Million - $1.38 Million	3,396 Added 17.07%	23,295 $8.24 Million
Q3 2022 Nov 09, 2022	BUY	$363.4 - $536.88 $2.4 Million - $3.55 Million	6,616 Added 49.81%	19,899 $7.23 Million
Q2 2022 Aug 10, 2022	BUY	$384.04 - $479.19 $1.13 Million - $1.41 Million	2,948 Added 28.52%	13,283 $5.1 Million
Q1 2022 May 13, 2022	BUY	$361.12 - $512.21 $318,868 - $452,281	883 Added 9.34%	10,335 $5.02 Million
Q4 2021 Feb 14, 2022	BUY	$460.83 - $575.97 $1.14 Million - $1.42 Million	2,469 Added 35.36%	9,452 $4.66 Million
Q3 2021 Nov 12, 2021	SELL	$370.18 - $517.92 $1.21 Million - $1.7 Million	-3,273 Reduced 31.91%	6,983 $3.39 Million
Q2 2021 Aug 12, 2021	SELL	$306.1 - $389.53 $96,727 - $123,091	-316 Reduced 2.99%	10,256 $3.83 Million
Q1 2021 May 13, 2021	BUY	$302.05 - $403.18 $29,298 - $39,108	97 Added 0.93%	10,572 $3.73 Million
Q4 2020 Feb 09, 2021	BUY	$272.37 - $366.23 $64,551 - $86,796	237 Added 2.31%	10,475 $3.84 Million
Q3 2020 Nov 06, 2020	BUY	$235.55 - $282.85 $16,488 - $19,799	70 Added 0.69%	10,238 $2.86 Million
Q2 2020 Aug 12, 2020	SELL	$153.42 - $237.0 $31,297 - $48,348	-204 Reduced 1.97%	10,168 $2.41 Million
Q1 2020 May 11, 2020	BUY	$135.22 - $191.43 $244,342 - $345,914	1,807 Added 21.1%	10,372 $1.74 Million
Q4 2019 Feb 13, 2020	BUY	$135.15 - $182.89 $20,407 - $27,616	151 Added 1.79%	8,565 $1.53 Million
Q3 2019 Nov 12, 2019	BUY	$136.01 - $161.55 $802,595 - $953,306	5,901 Added 234.82%	8,414 $1.31 Million
Q2 2019 Aug 13, 2019	SELL	$116.45 - $157.53 $154,762 - $209,357	-1,329 Reduced 34.59%	2,513 $341,000
Q1 2019 May 14, 2019	BUY	$108.61 - $145.01 $104,482 - $139,499	962 Added 33.4%	3,842 $521,000
Q4 2018 Feb 14, 2019	SELL	$104.17 - $134.73 $58,126 - $75,179	-558 Reduced 16.23%	2,880 $335,000
Q3 2018 Nov 13, 2018	SELL	$125.53 - $151.38 $231,728 - $279,447	-1,846 Reduced 34.94%	3,438 $432,000
Q2 2018 Aug 13, 2018	SELL	$110.8 - $141.63 $149,580 - $191,200	-1,350 Reduced 20.35%	5,284 $706,000
Q1 2018 May 15, 2018	SELL	$103.82 - $125.51 $10,382 - $12,551	-100 Reduced 1.49%	6,634 $768,000
Q4 2017 Feb 14, 2018	SELL	$107.55 - $126.64 $5,377 - $6,332	-50 Reduced 0.74%	6,734 $757,000
Q3 2017 Nov 13, 2017	BUY	$95.87 - $106.55 $650,382 - $722,835	6,784	6,784 $723,000

Others Institutions Holding MPWR

# of Institutions

1,096

Shares Held

66.4M

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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