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
Apr 08, 2026 Sell	Common Stock S-Sale	Tseng Saria EVP & General Counsel	Officer	400 Value: $516.8K
Apr 08, 2026 Sell	Common Stock S-Sale	Tseng Saria EVP & General Counsel	Officer	800 Value: $1.04M
Apr 08, 2026 Sell	Common Stock S-Sale	Tseng Saria EVP & General Counsel	Officer	1 279 Value: $1.67M
Apr 08, 2026 Sell	Common Stock S-Sale	Tseng Saria EVP & General Counsel	Officer	4 244 Value: $5.57M
Apr 08, 2026 Sell	Common Stock S-Sale	Tseng Saria EVP & General Counsel	Officer	840 Value: $1.11M
Apr 08, 2026 Sell	Common Stock S-Sale	Tseng Saria EVP & General Counsel	Officer	120 Value: $158.6K
Apr 06, 2026 Sell	Common Stock S-Sale	Tseng Saria EVP & General Counsel	Officer	1 396 Value: $1.65M
Apr 06, 2026 Sell	Common Stock S-Sale	Tseng Saria EVP & General Counsel	Officer	1 680 Value: $1.98M
Apr 06, 2026 Sell	Common Stock S-Sale	Tseng Saria EVP & General Counsel	Officer	2 036 Value: $2.38M
Apr 06, 2026 Sell	Common Stock S-Sale	Tseng Saria EVP & General Counsel	Officer	684 Value: $797.3K
Apr 06, 2026 Sell	Common Stock S-Sale	Tseng Saria EVP & General Counsel	Officer	560 Value: $649.4K
Apr 06, 2026 Sell	Common Stock S-Sale	Tseng Saria EVP & General Counsel	Officer	480 Value: $551.5K
Apr 06, 2026 Sell	Common Stock S-Sale	Tseng Saria EVP & General Counsel	Officer	244 Value: $278.2K
Apr 06, 2026 Sell	Common Stock S-Sale	Tseng Saria EVP & General Counsel	Officer	556 Value: $636.3K
Apr 01, 2026 Sell	Common Stock S-Sale	Sciammas Maurice EVP, Ww Sales & Marketing	Officer	30 Value: $33.5K
Apr 01, 2026 Sell	Common Stock S-Sale	Tseng Saria EVP & General Counsel	Officer	576 Value: $651.6K
Apr 01, 2026 Sell	Common Stock S-Sale	Tseng Saria EVP & General Counsel	Officer	184 Value: $208.3K
Apr 01, 2026 Sell	Common Stock S-Sale	Tseng Saria EVP & General Counsel	Officer	160 Value: $181.5K
Apr 01, 2026 Sell	Common Stock S-Sale	Tseng Saria EVP & General Counsel	Officer	188 Value: $213.6K
Apr 01, 2026 Sell	Common Stock S-Sale	Tseng Saria EVP & General Counsel	Officer	292 Value: $332.0K
Mar 30, 2026 Sell	Common Stock S-Sale	Tseng Saria EVP & General Counsel	Officer	2 440 Value: $2.51M
Mar 30, 2026 Sell	Common Stock S-Sale	Tseng Saria EVP & General Counsel	Officer	2 200 Value: $2.25M
Mar 30, 2026 Sell	Common Stock S-Sale	Tseng Saria EVP & General Counsel	Officer	3 194 Value: $3.25M
Mar 30, 2026 Sell	Common Stock S-Sale	Tseng Saria EVP & General Counsel	Officer	3 360 Value: $3.39M
Mar 30, 2026 Sell	Common Stock S-Sale	Tseng Saria EVP & General Counsel	Officer	9 080 Value: $9.13M

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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