Key facts
- This page summarizes Mr. Robert W. Dean II's Form 4 filing for MONOLITHIC POWER SYSTEMS, INC. (MPWR).
- 1 reported transaction and 0 derivative rows are listed below.
- Accepted by SEC: 19 Aug 2026, 20:44.
Mr. Robert W. Dean II - 17 Aug 2026 Form 4 Insider Report for MONOLITHIC POWER SYSTEMS, INC. (MPWR)
- Reporting relationship
- Interim CFO
- Issuer ticker
- MPWR
- Reported as of
- 17 Aug 2026
- Net transaction value
- -$8,482
- SEC form
- 4
- Accepted by SEC
- 19 Aug 2026, 20:44:57 UTC
- Prior SEC filing
- 06 Aug 2026
- Source filing
- View source filing
- Reporting owner signature
- /s/ Saria Tseng, attorney-in-fact for Mr. Robert W. Dean II
Source evidence
Original filing metadata and source links for verification.
4 source fields
Reporting owner
1 detail
Key filing fact
Mr. Robert W. Dean II filed Form 4 for MONOLITHIC POWER SYSTEMS, INC. (MPWR) on 19 Aug 2026.
Change
- Previous filing in this sequence was filed on 06 Aug 2026.
- Current net transaction value: -$8,482.
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 0001445300
Primary reporting owner
DEAN ROBERT W II
- Relationship
- Interim CFO
- Address
- 1555 PALM BEACH LAKES BLVD., WEST PALM BEACH
- Signature
- /s/ Saria Tseng, attorney-in-fact for Mr. Robert W. Dean II
- Signature date
- 19 Aug 2026
Reported non-derivative transactions
Shares, units, or other non-derivative securities reported in this filing.
MPWR
transaction
Common Stock
Sale
- Transaction value
- $8,482
- Shares
- -6
- Change %
- -0.08%
- Price
- $1413.64
- Shares after
- 7,126
- Date
- 17 Aug 2026
- Ownership
- Direct
- Footnotes
- F1
MPWR
holding
Common Stock
No transaction description listed
- Transaction value
- Shares
- Change %
- Price
- Shares after
- 65
- Date
- 17 Aug 2026
- Ownership
- Held by Parent & Daughter
* 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
The reported sale was to cover tax withholding obligations upon the vesting of restricted stock units.