Form 4 for MPWR Monolithic Power Systems
Accepted 2025-12-29 00:00:00 ET · period of report 2025-12-24 · accession 0001214659-25-018478 · SEC index · Original document
Summary rows
Aggregated the way they appear in lists: one row per insider, transaction code and security table.
| X | Filed | Traded | Ticker | Insider | Title | Type | Price | Qty | Owned | ΔOwn | Value |
|---|---|---|---|---|---|---|---|---|---|---|---|
| M | 2025-12-29 | 2025-12-24 | MPWR | Lee Victor K | Dir | S - Sale | $951.72 | -1,000 | 29.4K | -3% | -$951.7K |
Purchase Sale Sale after option exercise All abbreviations
Every reported transaction
| # | Table | Security | Date | Code | A/D | Shares | Price | Owned after | Own | Exercise / expiry | Underlying | Footnotes |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 1 | Common | Common Stock | 2025-12-24 | S | D | 200 | $953.70 | 28,647 | D | — | — | (F1) These transactions were made pursuant to a Rule 10b5-1 trading plan adopted by the reporting person on 8/25/2025. (F6) The 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 $953.31 to $953.99. 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. |
| 2 | Common | Common Stock | 2025-12-24 | S | D | 80 | $955.08 | 28,567 | D | — | — | (F1) These transactions were made pursuant to a Rule 10b5-1 trading plan adopted by the reporting person on 8/25/2025. (F7) The 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 $955.05 to $955.10. 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. |
| 3 | Common | Common Stock | 2025-12-24 | S | D | 83 | $952.37 | 28,847 | D | — | — | (F1) These transactions were made pursuant to a Rule 10b5-1 trading plan adopted by the reporting person on 8/25/2025. (F5) The 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 $952.23 to $952.76. 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. |
| 4 | Common | Common Stock | 2025-12-24 | S | D | 160 | $951.60 | 28,930 | D | — | — | (F1) These transactions were made pursuant to a Rule 10b5-1 trading plan adopted by the reporting person on 8/25/2025. (F4) The 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 $951.24 to $951.84. 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. |
| 5 | Common | Common Stock | 2025-12-24 | S | D | 280 | $950.64 | 29,090 | D | — | — | (F1) These transactions were made pursuant to a Rule 10b5-1 trading plan adopted by the reporting person on 8/25/2025. (F3) The 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 $950.30 to $950.90. 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. |
| 6 | Common | Common Stock | 2025-12-24 | S | D | 197 | $949.70 | 29,370 | D | — | — | (F1) These transactions were made pursuant to a Rule 10b5-1 trading plan adopted by the reporting person on 8/25/2025. (F2) The 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 $949.23 to $949.98. 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. |