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: 25 Aug 2026, 19:13.
Mr. Herbert Chang - 24 Aug 2026 Form 4 Insider Report for MONOLITHIC POWER SYSTEMS, INC. (MPWR)
- Reporting relationship
- Director
- Issuer ticker
- MPWR
- Reported as of
- 24 Aug 2026
- Net transaction value
- -$64,078
- SEC form
- 4
- Accepted by SEC
- 25 Aug 2026, 19:13:50 UTC
- Prior SEC filing
- 13 Aug 2026
- Source filing
- View source filing
- Reporting owner signature
- /s/ Saria Tseng, attorney-in-fact for Mr. Herbert Chang
Source evidence
Original filing metadata and source links for verification.
4 source fields
Reporting owner
1 detail
Key filing fact
Mr. Herbert Chang filed Form 4 for MONOLITHIC POWER SYSTEMS, INC. (MPWR) on 25 Aug 2026.
Change
- Previous filing in this sequence was filed on 13 Aug 2026.
- Current net transaction value: -$64,078.
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
View source filing
Ownership activity is grounded in SEC Form 4 disclosures.
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
- 25 Aug 2026
Reported non-derivative transactions
Shares, units, or other non-derivative securities reported in this filing.
MPWR
transaction
Common Stock
Sale
- Transaction value
- $64,078
- Shares
- -50
- Change %
- -8.8%
- Price
- $1281.57
- Shares after
- 515
- Date
- 24 Aug 2026
- Ownership
- Direct
* marks a reported price that did not pass the local price check.