NASDAQ:MPWR

Monolithic Power Systems Stock Insider Trading

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$1,537.88
-25.82 (-1.65%)
At Close: Jun 22, 2026

Monolithic Power Systems Stock Insider Power

Based on the 100 latest insides trades, we have calculated the insider power to be negative at -99.81. In total, the insiders bought 1.56K and sold 204.22K 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)
-99.81
Buy 1.56K shares
Sell 204.22K shares
3% 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 -99.81.
  • Confidence increased due to high data reliability score of 100.
  • Supported by overwhelming sell-side pressure (3% buys).

Historical Insider Trades

Date Type Person Role Amount
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
May 22, 2026
Sell
Common Stock
S-Sale
Tseng Saria
EVP & General Counsel
Officer 5 000
Value: $7.93M
May 22, 2026
Sell
Common Stock
G-Gift
Tseng Saria
EVP & General Counsel
Officer 200
Value: $0
May 18, 2026
Sell
Common Stock
S-Sale
Hsing Michael
CEO
CEO / President 5 819
Value: $8.54M
May 18, 2026
Sell
Common Stock
S-Sale
Hsing Michael
CEO
CEO / President 3 424
Value: $5.01M
May 18, 2026
Sell
Common Stock
S-Sale
Hsing Michael
CEO
CEO / President 5 049
Value: $7.44M
May 18, 2026
Sell
Common Stock
S-Sale
Hsing Michael
CEO
CEO / President 4 082
Value: $6.03M
May 18, 2026
Sell
Common Stock
S-Sale
Dean Robert W Ii
Interim CFO
C-Suite Officer 4
Value: $6K
May 18, 2026
Sell
Common Stock
S-Sale
Hsing Michael
CEO
CEO / President 5 737
Value: $8.51M
May 18, 2026
Sell
Common Stock
S-Sale
Hsing Michael
CEO
CEO / President 2 929
Value: $4.40M
May 18, 2026
Sell
Common Stock
S-Sale
Hsing Michael
CEO
CEO / President 3 769
Value: $5.68M
May 18, 2026
Sell
Common Stock
S-Sale
Hsing Michael
CEO
CEO / President 352
Value: $534.4K
May 18, 2026
Sell
Common Stock
S-Sale
Hsing Michael
CEO
CEO / President 608
Value: $911.7K
May 18, 2026
Sell
Common Stock
S-Sale
Hsing Michael
CEO
CEO / President 862
Value: $1.29M
May 18, 2026
Sell
Common Stock
S-Sale
Hsing Michael
CEO
CEO / President 6 688
Value: $9.94M
May 18, 2026
Sell
Common Stock
S-Sale
Hsing Michael
CEO
CEO / President 130
Value: $197.8K
May 18, 2026
Sell
Common Stock
S-Sale
Hsing Michael
CEO
CEO / President 551
Value: $833.7K
May 15, 2026
Sell
Common Stock
S-Sale
Sciammas Maurice
EVP, Ww Sales & Marketing
Officer 3 741
Value: $5.80M
May 15, 2026
Sell
Common Stock
S-Sale
Sciammas Maurice
EVP, Ww Sales & Marketing
Officer 50
Value: $79.3K
May 15, 2026
Sell
Common Stock
S-Sale
Sciammas Maurice
EVP, Ww Sales & Marketing
Officer 447
Value: $707.2K
May 15, 2026
Sell
Common Stock
S-Sale
Sciammas Maurice
EVP, Ww Sales & Marketing
Officer 1 717
Value: $2.67M

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

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ABOUT MONOLITHIC POWER SYSTEMS
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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