SEC Form 4 · accession 0001214659-26-010932
MONOLITHIC POWER SYSTEMS, INC. · MPWR
Statement of changes in beneficial ownership, as filed. Original on EDGAR ↗
Reporting owner
Robert W Dean II
Officer — Interim CFO
Period of report
Aug 24, 2026
Accepted (ET)
Aug 26, 2026 · 7:22 pm EDT
Rule 10b5-1 plan
box not checked
Issuer CIK
0001280452
Table I — non-derivative securities
| Security | Date | Code | Shares | Price | A/D | Owned after | D/I | Nature of ownership |
|---|---|---|---|---|---|---|---|---|
| Common StockF1,F2 | Aug 24, 2026 | S | 32 | $1,297.72 | D | 7,094 | D | |
| Common StockF3 | Aug 24, 2026 | J | 5 | $0.00 | D | 7,089 | D | |
| Common Stock | holding | — | — | — | 65 | I | Held by Parent & Daughter |
Table II — derivative securities
No Table II lines on this filing.
Explanation of responses
- F1The reported sale was to cover tax withholding obligations upon the vesting of restricted stock units.
- F2The price is the weighted average sale price for the transactions reported on this line. The prices for the transactions reported on this line range from $1,296.07 to $1,298.01. The reporting person undertakes to provide, upon request by the staff of the Securities and Exchange Commission, the issuer, or a security holder of the issuer, full information regarding the number of shares sold at each separate price.
- F3The reported transaction involved a transfer of securities from the reporting person's direct holdings to an individual who is not an immediate family member sharing the same household. No funds were exchanged and no sale of shares occurred in the transfer. Following the completion of the transfer, the reporting person no longer retains any pecuniary interest in the shares.