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
May 13, 2026 Sell	Common Stock G-Gift	Sciammas Maurice EVP, Ww Sales & Marketing	Officer	1 563 Value: $0
May 13, 2026 Buy	Common Stock G-Gift	Sciammas Maurice EVP, Ww Sales & Marketing	Officer	1 563 Value: $2.58M
May 06, 2026 Sell	Common Stock S-Sale	Wynne Eileen Director	Director	335 Value: $530.2K
May 06, 2026 Sell	Common Stock S-Sale	Xiao Deming EVP, Global Operations	Officer	907 Value: $1.51M
May 06, 2026 Sell	Common Stock S-Sale	Xiao Deming EVP, Global Operations	Officer	11 597 Value: $19.2M
May 06, 2026 Sell	Common Stock S-Sale	Xiao Deming EVP, Global Operations	Officer	14 167 Value: $23.4M
May 06, 2026 Sell	Common Stock S-Sale	Xiao Deming EVP, Global Operations	Officer	3 329 Value: $5.49M
May 06, 2026 Sell	Common Stock S-Sale	Elmiger Eugen J Director	Director	514 Value: $822.5K
May 06, 2026 Sell	Common Stock S-Sale	Elmiger Eugen J Director	Director	2 619 Value: $4.18M
May 06, 2026 Sell	Common Stock S-Sale	Elmiger Eugen J Director	Director	1 355 Value: $2.16M
May 06, 2026 Sell	Common Stock S-Sale	Elmiger Eugen J Director	Director	2 587 Value: $4.11M
May 06, 2026 Sell	Common Stock S-Sale	Elmiger Eugen J Director	Director	1 879 Value: $2.97M
May 06, 2026 Sell	Common Stock S-Sale	Elmiger Eugen J Director	Director	834 Value: $1.31M
May 06, 2026 Sell	Common Stock S-Sale	Elmiger Eugen J Director	Director	814 Value: $1.28M
May 06, 2026 Sell	Common Stock S-Sale	Elmiger Eugen J Director	Director	1 078 Value: $1.69M
May 06, 2026 Sell	Common Stock S-Sale	Elmiger Eugen J Director	Director	320 Value: $499.2K
May 06, 2026 Sell	Common Stock S-Sale	Zhou Jeff Director	Director	500 Value: $825.0K
May 05, 2026 Sell	Common Stock S-Sale	Zhou Jeff Director	Director	514 Value: $809.3K
May 05, 2026 Sell	Common Stock S-Sale	Zhou Jeff Director	Director	500 Value: $800.0K
May 05, 2026 Sell	Common Stock S-Sale	Sciammas Maurice EVP, Ww Sales & Marketing	Officer	380 Value: $601.8K
May 04, 2026 Sell	Common Stock S-Sale	Sciammas Maurice EVP, Ww Sales & Marketing	Officer	30 Value: $47.7K
Apr 08, 2026 Sell	Common Stock S-Sale	Tseng Saria EVP & General Counsel	Officer	240 Value: $307.1K
Apr 08, 2026 Sell	Common Stock S-Sale	Tseng Saria EVP & General Counsel	Officer	360 Value: $457.3K
Apr 08, 2026 Sell	Common Stock S-Sale	Tseng Saria EVP & General Counsel	Officer	560 Value: $709.2K
Apr 08, 2026 Sell	Common Stock S-Sale	Tseng Saria EVP & General Counsel	Officer	120 Value: $154.5K

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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