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Insider Trading Arrangements
 3 Months Ended 12 Months Ended
Dec. 31, 2025
shares
Dec. 31, 2025
shares
Trading Arrangements, by Individual [Table]    
Material Terms of Trading Arrangement [Text Block]  

Item 9B.

Other Information

 

10b5-1 Trading Plans

 

Certain of our executive officers and directors have entered into trading plans pursuant to Rule 10b5-1(c) of the Securities Exchange Act of 1934, as amended. A trading plan is a written document that pre-establishes the amounts, prices and dates (or formula for determining the amounts, prices and dates) of future purchases or sales of our common stock, including the sale of shares acquired pursuant to the Monolithic Power Systems, Inc. 2004 Employee Stock Purchase Plan, amended and restated, and upon vesting of RSUs.

 

The following table summarizes the adoption of trading plans intended to satisfy the affirmative defense conditions of Rule 10b5-1(c) during the three months ended December 31, 2025:

 

Name and Title

 

Adoption Date

 

Plan Duration

 

Intended Sale Amount

(in shares)

Deming Xiao, Executive Vice President, Global Operations

 

November 13, 2025

 

Through November 13, 2026

 

Up to 80,976

Maurice Sciammas, Executive Vice President, Worldwide Sales and Marketing

 

November 24, 2025

 

Through December 31, 2026

 

Up to 42,000

Saria Tseng, Executive Vice President, Strategic Corporate Development, General Counsel and Corporate Secretary

 

November 28, 2025

 

Through November 27, 2026

 

Up to 43,673

 

The following table summarizes the termination of trading plans intended to satisfy the affirmative defense conditions of Rule 10b5-1(c) during the three months ended December 31, 2025:

 

Name and Title

 

Termination Date

 

Original Plan Duration

 

Intended Sale Amount

(in shares)

 

Sold Amount

(in shares)

Saria Tseng, Executive Vice President, Strategic Corporate Development, General Counsel and Corporate Secretary

 

November 17, 2025

 

Through December 31, 2025

 

Up to 33,963

 

32,650

 

During the three months ended December 31, 2025, no trading plans intended to satisfy the affirmative defense conditions of Rule 10b5-1(c) were modified, and no other written trading arrangements that are not intended to qualify for the Rule 10b5-1(c) affirmative defense were adopted, modified, or terminated.
Non-Rule 10b5-1 Arrangement Adopted [Flag] false  
Non-Rule 10b5-1 Arrangement Terminated [Flag] false  
Deming Xiao [Member]    
Trading Arrangements, by Individual [Table]    
Rule 10b5-1 Arrangement Adopted [Flag] true  
Trading Arrangement, Individual Name Deming Xiao  
Trading Arrangement, Individual Title Executive Vice President, Global Operations  
Trading Arrangement Adoption Date November 13, 2025  
Trading Arrangement Expiration Date November 13, 2026  
Trading Arrangement, Securities Aggregate Available Amount 80,976 80,976
Maurice Sciammas [Member]    
Trading Arrangements, by Individual [Table]    
Rule 10b5-1 Arrangement Adopted [Flag] true  
Trading Arrangement, Individual Name Maurice Sciammas  
Trading Arrangement, Individual Title Executive Vice President, Worldwide Sales and Marketing  
Trading Arrangement Adoption Date November 24, 2025  
Trading Arrangement Expiration Date December 31, 2026  
Trading Arrangement, Securities Aggregate Available Amount 42,000 42,000
Saria Tseng [Member]    
Trading Arrangements, by Individual [Table]    
Rule 10b5-1 Arrangement Adopted [Flag] true  
Trading Arrangement, Individual Name Saria Tseng  
Trading Arrangement, Individual Title Executive Vice President, Strategic Corporate Development, General Counsel and Corporate Secretary  
Trading Arrangement Adoption Date November 28, 2025  
Trading Arrangement Expiration Date November 27, 2026  
Trading Arrangement, Securities Aggregate Available Amount 43,673 43,673
Saria Tseng 2 [Member]    
Trading Arrangements, by Individual [Table]    
Trading Arrangement, Individual Name Saria Tseng  
Trading Arrangement, Individual Title Executive Vice President, Strategic Corporate Development, General Counsel and Corporate Secretary  
Trading Arrangement Expiration Date December 31, 2025  
Trading Arrangement, Securities Aggregate Available Amount 32,650 32,650
Rule 10b5-1 Arrangement Terminated [Flag] true  
Trading Arrangement Termination Date November 17, 2025