Sciammas Maurice's Form 4 filing
Monolithic Power Systems, Inc. (MPWR) · filed Nov 20, 2025
- Accession no.
- 0001214659-25-017016
- Filed
- Nov 20, 2025
- Trade date
- Nov 19, 2025
- Filing delay
- 1 day
- Rule 10b5-1 plan
- Not checked
This filing lists 12 non-derivative transactions. Open-market sales total $24.7M. It was filed 1 day after the trade.
Reporting owners
A Form 4 can have several reporting owners, such as a person and a fund they control. Trade tables show the first one.
| Owner | Relationship to the company |
|---|---|
| Sciammas MauriceCIK 0001360833 | Officer (EVP, WW Sales & Marketing) |
Non-derivative securities (Table I)
Acquisitions and disposals of common stock and similar shares, one row per line on the filing.
| Trade date | Security | Transaction | Shares | Price | Value | Shares after | Ownership | Flags |
|---|---|---|---|---|---|---|---|---|
| Nov 19, 2025 | Common Stock | SSaleDisposed | −431 | $875.26F1 | −$377,237.06 | 175,841 | Direct | |
| Nov 19, 2025 | Common Stock | SSaleDisposed | −940 | $876.62F2 | −$824,022.8 | 174,901 | Direct | |
| Nov 19, 2025 | Common Stock | SSaleDisposed | −1,976 | $877.45F3 | −$1,733,841.2 | 172,925 | Direct | |
| Nov 19, 2025 | Common Stock | SSaleDisposed | −1,854 | $878.55F4 | −$1,628,831.7 | 171,071 | Direct | |
| Nov 19, 2025 | Common Stock | SSaleDisposed | −1,966 | $879.54F5 | −$1,729,175.64 | 169,105 | Direct | |
| Nov 19, 2025 | Common Stock | SSaleDisposed | −3,776 | $880.58F6 | −$3,325,070.08 | 165,329 | Direct | |
| Nov 19, 2025 | Common Stock | SSaleDisposed | −2,469 | $881.42F7 | −$2,176,225.98 | 162,860 | Direct | |
| Nov 19, 2025 | Common Stock | SSaleDisposed | −3,344 | $882.51F8 | −$2,951,113.44 | 159,516 | Direct | |
| Nov 19, 2025 | Common Stock | SSaleDisposed | −6,513 | $883.50F9 | −$5,754,235.5 | 153,003 | Direct | |
| Nov 19, 2025 | Common Stock | SSaleDisposed | −2,149 | $884.44F10 | −$1,900,661.56 | 150,854 | Direct | |
| Nov 19, 2025 | Common Stock | SSaleDisposed | −1,738 | $885.10F11 | −$1,538,303.8 | 149,116 | Direct | |
| Nov 19, 2025 | Common Stock | SSaleDisposed | −810 | $886.01F12 | −$717,668.1 | 148,306 | Direct |
Footnotes and remarks
Livermore keeps the footnotes that transaction prices refer to, all footnotes of amendments (Form 4/A) and the filing's remarks. Other footnotes, such as how indirect holdings are held or the details of a trading plan, are only in the original on SEC EDGAR.
- 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 $875.01 to $875.95. 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.
Referenced by the price of 1 transaction in Table I.
- 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 $876.28 to $876.97. 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.
Referenced by the price of 1 transaction in Table I.
- 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 $877.00 to $877.97. 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.
Referenced by the price of 1 transaction in Table I.
- 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 $878.00 to $878.97. 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.
Referenced by the price of 1 transaction in Table I.
- 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 $879.25 to $879.99. 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.
Referenced by the price of 1 transaction in Table I.
- 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 $880.07 to $880.94. 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.
Referenced by the price of 1 transaction in Table I.
- 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 $881.01 to $881.93. 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.
Referenced by the price of 1 transaction in Table I.
- 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 $882.06 to $882.92. 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.
Referenced by the price of 1 transaction in Table I.
- 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 $883.00 to $883.93. 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.
Referenced by the price of 1 transaction in Table I.
- 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 $884.00 to $884.69. 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.
Referenced by the price of 1 transaction in Table I.
- F11
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 $885.00 to $885.99. 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.
Referenced by the price of 1 transaction in Table I.
- F12
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 $886.00 to $886.15. 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.
Referenced by the price of 1 transaction in Table I.