Mr. Herbert Chang - 03 Feb 2026 Form 4 Insider Report for MONOLITHIC POWER SYSTEMS INC (MPWR)

Reporting relationship: Director
Issuer ticker: MPWR
Reported as of: 03 Feb 2026
Net transaction value: $0
SEC form: 4
Accepted by SEC: 05 Feb 2026, 20:01:11 UTC
Prior SEC filing: 25 Nov 2025
Source filing: View source filing
Reporting owner signature: /s/ Saria Tseng, attorney-in-fact for Mr. Herbert Chang

Key filing fact

Mr. Herbert Chang filed Form 4 for MONOLITHIC POWER SYSTEMS INC (MPWR) on 05 Feb 2026.

Key facts

This page summarizes Mr. Herbert Chang's Form 4 filing for MONOLITHIC POWER SYSTEMS INC (MPWR).
1 reported transaction and 0 derivative rows are listed below.
Accepted by SEC: 05 Feb 2026, 20:01.

Change

Previous filing in this sequence was filed on 25 Nov 2025.
Current net transaction value: $0.

Research use

This tells you what this filing adds before you inspect full transaction and derivative tables.
You can trace every row back to the original SEC filing document.

Evidence

Filed on Form 4

Ownership activity is grounded in SEC Form 4 disclosures.

View source filing

Reporting Owners (1)

CIK 0001192171 Primary reporting owner

CHANG KUO WEI HERBERT

Relationship: Director
Address: 1555 PALM BEACH LAKES BLVD., WEST PALM BEACH
Signature: /s/ Saria Tseng, attorney-in-fact for Mr. Herbert Chang
Signature date: 03 Feb 2026

Reported non-derivative transactions

Shares, units, or other non-derivative securities reported in this filing.

MPWR transaction

Common Stock

Award

Transaction value: $0
Shares: +189
Change %: +44%
Price: $0.000000
Shares after: 615
Date: 03 Feb 2026
Ownership: Direct
Footnotes: F1

^* marks a reported price that did not pass the local price check.

Additional SEC filing notes

Filing notes and footnotes

Explanation of responses 1 footnote

Footnote F1

On February 3, 2026, the Board of Directors approved the annual restricted stock unit grant to each independent director. The RSU grant will vest one year after the grant date, subject to continued service with the company.