Notice of Proposed Sale · 144
Monolithic Power Systems, Inc.
MPWRNASDAQEQUITYCurrent
Notice of Proposed Sale
Structured filing — 144
primary_doc.xml
Notice of proposed sale. The proposed amounts below do not establish that a sale occurred.
Proposed-sale notice
- Issuer
- MONOLITHIC POWER SYSTEMS, INC.
- Issuer CIK
- 0001280452
- SEC file number
- 000-51026
- Phone
- 561-839-3999
- Person for whose account securities are to be sold
- DEAN ROBERT W II
- Relationships to issuer
- Officer
- Street
- 1555 PALM BEACH LAKES BLVD.
- City
- WEST PALM BEACH
- State / country code
- FL
- Postal code
- 33401
Securities proposed for sale
| Security | Proposed units | Aggregate market value | Units outstanding | Approximate sale date | Exchange | Broker / market maker |
|---|---|---|---|---|---|---|
| Common Stock | 6 | 8,128.45 | 49,104,390 | 08/17/2026 | NASDAQ | Morgan Stanley Smith Barney LLC Executive Financial Services |
Broker / market maker — proposed row 1, entry 1
- Name
- Morgan Stanley Smith Barney LLC Executive Financial Services
- Street
- 1 New York Plaza
- Street (continued)
- 8th Floor
- City
- New York
- State / country code
- NY
- Postal code
- 10004
Acquisition of securities to be sold
| Security | Acquired | Nature of acquisition | Acquired from | Amount acquired | Gift transaction | Payment date | Nature of payment |
|---|---|---|---|---|---|---|---|
| Common Stock | 08/15/2026 | Time-based restricted stock units | Issuer | 6 | N | 08/15/2026 | N/A |
Sales reported in the preceding three months
| Seller | Security | Sale date | Amount sold | Gross proceeds |
|---|---|---|---|---|
| Robert Dean | Common Stock | 08/05/2026 | 105 | 141,148.35 |
| Robert Dean | Common Stock | 05/26/2026 | 22 | 35,882.23 |
| Robert Dean | Common Stock | 05/18/2026 | 4 | 6,253.12 |
Seller — prior-sale row 1, entry 1
- Name
- Robert Dean
- Street
- 1555 PALM BEACH LAKESBLVD.
- City
- WEST PALM BEACH
- State / country code
- FL
- Postal code
- 98033
Seller — prior-sale row 2, entry 1
- Name
- Robert Dean
- Street
- 1555 PALM BEACH LAKESBLVD.
- City
- WEST PALM BEACH
- State / country code
- FL
- Postal code
- 98033
Seller — prior-sale row 3, entry 1
- Name
- Robert Dean
- Street
- 1555 PALM BEACH LAKES BLVD.
- City
- WEST PALM BEACH
- State / country code
- FL
- Postal code
- 98033
Prior-sale reporting
- Nothing to report for the preceding three months
- N
Notice signature
- Notice date
- 08/17/2026
- Signed
- /s/ Robert Dean