Form 4 for MPWR Monolithic Power Systems
Accepted 2025-11-20 00:00:00 ET · period of report 2025-11-19 · accession 0001214659-25-017014 · 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 | 2025-11-20 | 2025-11-19 | MPWR | Sciammas Maurice | EVP, WW Sales, Marketing | S - Sale | $870.21 | -7,034 | 178.7K | -4% | -$6.12M |
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 | 2025-11-19 | S | D | 320 | $870.36 | 178,943 | D | — | — | (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 $870.07 to $870.98. 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. |
| 2 | Common | Common Stock | 2025-11-19 | S | D | 1,842 | $869.39 | 179,263 | D | — | — | (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 $869.00 to $869.91. 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 | 2025-11-19 | S | D | 723 | $868.42 | 181,105 | D | — | — | (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 $868.00 to $868.94. 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 | 2025-11-19 | S | D | 699 | $867.57 | 181,828 | D | — | — | (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 $867.04 to $867.98. 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. |
| 5 | Common | Common Stock | 2025-11-19 | S | D | 339 | $866.19 | 182,527 | D | — | — | (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 $866.16 to $866.51. 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 | 2025-11-19 | S | D | 40 | $865.89 | 182,866 | D | — | — | |
| 7 | Common | Common Stock | 2025-11-19 | S | D | 160 | $863.86 | 182,906 | D | — | — | |
| 8 | Common | Common Stock | 2025-11-19 | S | D | 240 | $862.58 | 183,066 | D | — | — | (F1) 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 $862.25 to $862.75. 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. |
| 9 | Common | Common Stock | 2025-11-19 | S | D | 1,146 | $873.78 | 177,003 | D | — | — | (F9) 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 $873.49 to $873.97. 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. |
| 10 | Common | Common Stock | 2025-11-19 | S | D | 574 | $872.80 | 178,149 | D | — | — | (F8) 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 $872.74 to $872.89. 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. |
| 11 | Common | Common Stock | 2025-11-19 | S | D | 731 | $874.50 | 176,272 | D | — | — | (F10) 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 $874.09 to $874.90. 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. |
| 12 | Common | Common Stock | 2025-11-19 | S | D | 220 | $871.45 | 178,723 | D | — | — | (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 $871.39 to $871.64. 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. |