NASDAQ:MPWR

Monolithic Power Systems Stock Insider Trading

Technology > Semiconductors

Buy MPWR

*Your capital is at risk

$1,426.03

+109.85 (+8.35%)

At Close: Jul 31, 2026

Monolithic Power Systems Stock Insider Power

Based on the 100 latest insides trades, we have calculated the insider power to be negative at -99.60. In total, the insiders bought 2.92K and sold 179.09K MPWR shares in the last 100 trades. The insider score can be negative despite buy/sell ratio being positive. The score focuses on the quality of the trades.

Insider Power (Last 100 transactions)	-99.60
● Buy	2.92K shares
● Sell	179.09K shares
2% Buy Activity Negligible or No Correlation
Sell Signal High Confidence Feb 06, 2026 Analysis Breakdown: Strongly supported by a very low Insider Power Score of -99.6. Confidence increased due to high data reliability score of 100. Supported by overwhelming sell-side pressure (2% buys).

Historical Insider Trades

Date	Type	Person	Role	Amount
Jul 25, 2026 Buy	Common Stock A-Award	Dean Robert W Ii Interim CFO	C-Suite Officer	1 359 Value: $1.94M
Jul 15, 2026 Sell	Common Stock S-Sale	Sciammas Maurice EVP, Ww Sales & Marketing	Officer	50 Value: $69.4K
Jul 15, 2026 Sell	Common Stock S-Sale	Sciammas Maurice EVP, Ww Sales & Marketing	Officer	213 Value: $297.4K
Jul 15, 2026 Sell	Common Stock S-Sale	Sciammas Maurice EVP, Ww Sales & Marketing	Officer	110 Value: $154.6K
Jul 15, 2026 Sell	Common Stock S-Sale	Sciammas Maurice EVP, Ww Sales & Marketing	Officer	527 Value: $692.5K
Jul 15, 2026 Sell	Common Stock S-Sale	Sciammas Maurice EVP, Ww Sales & Marketing	Officer	274 Value: $361.2K
Jul 15, 2026 Sell	Common Stock S-Sale	Sciammas Maurice EVP, Ww Sales & Marketing	Officer	240 Value: $328.6K
Jul 15, 2026 Sell	Common Stock S-Sale	Sciammas Maurice EVP, Ww Sales & Marketing	Officer	472 Value: $649.2K
Jul 15, 2026 Sell	Common Stock S-Sale	Sciammas Maurice EVP, Ww Sales & Marketing	Officer	464 Value: $616.8K
Jul 15, 2026 Sell	Common Stock S-Sale	Sciammas Maurice EVP, Ww Sales & Marketing	Officer	409 Value: $541.5K
Jul 15, 2026 Sell	Common Stock S-Sale	Sciammas Maurice EVP, Ww Sales & Marketing	Officer	776 Value: $1.04M
Jul 15, 2026 Sell	Common Stock S-Sale	Sciammas Maurice EVP, Ww Sales & Marketing	Officer	50 Value: $68.0K
Jul 15, 2026 Sell	Common Stock S-Sale	Sciammas Maurice EVP, Ww Sales & Marketing	Officer	5 640 Value: $7.63M
Jul 15, 2026 Sell	Common Stock S-Sale	Sciammas Maurice EVP, Ww Sales & Marketing	Officer	1 506 Value: $2.03M
Jul 15, 2026 Sell	Common Stock S-Sale	Sciammas Maurice EVP, Ww Sales & Marketing	Officer	1 864 Value: $2.51M
Jul 15, 2026 Sell	Common Stock S-Sale	Sciammas Maurice EVP, Ww Sales & Marketing	Officer	1 460 Value: $1.96M
Jul 15, 2026 Sell	Common Stock S-Sale	Sciammas Maurice EVP, Ww Sales & Marketing	Officer	410 Value: $567.5K
Jul 15, 2026 Sell	Common Stock S-Sale	Sciammas Maurice EVP, Ww Sales & Marketing	Officer	418 Value: $576.3K
Jul 15, 2026 Sell	Common Stock S-Sale	Sciammas Maurice EVP, Ww Sales & Marketing	Officer	117 Value: $163.9K
Jul 01, 2026 Sell	Common Stock S-Sale	Sciammas Maurice EVP, Ww Sales & Marketing	Officer	30 Value: $40.5K
Jun 01, 2026 Sell	Common Stock S-Sale	Sciammas Maurice EVP, Ww Sales & Marketing	Officer	30 Value: $46.0K
May 29, 2026 Sell	Common Stock G-Gift	Sciammas Maurice EVP, Ww Sales & Marketing	Officer	12 472 Value: $0
May 27, 2026 Sell	Common Stock S-Sale	Tseng Saria EVP & General Counsel	Officer	7 565 Value: $12.9M
May 26, 2026 Sell	Common Stock S-Sale	Dean Robert W Ii Interim CFO	C-Suite Officer	22 Value: $36.3K
May 26, 2026 Sell	Common Stock S-Sale	Zhou Jeff Director	Director	486 Value: $816.5K

About Insider Power

Insider Power is a proprietary algorithm developed by StockInvest.us to evaluate the significance of insider transactions. The calculation considers the size, type, and timing of transactions, as well as the insider’s role within the company.

It is important to note that, in general, there is little to no correlation between insider transactions and short-term stock price movements. In one of our studies, only 0.22%^* of stocks with insider activity showed a measurable correlation — and even then, it was unclear whether the effect was caused by insider actions or simply by the stock’s broader trend.

While our algorithms are designed to highlight potentially meaningful signals, these cannot be regarded as statistically significant on their own. Insider trading activity should therefore be seen as informative rather than as direct trading guidance. The Insider Power metric was created to present this information in a clearer and more accessible way, helping investors better understand the possible context of insider activity.

* October 6th, 2025 - Tested on 5562 stocks

ABOUT MONOLITHIC POWER SYSTEMS

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 voltages of various electronic systems, such as portable electronic devices, wireless LAN access points, comp...

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