Tseng Saria's Form 4 filing
Monolithic Power Systems, Inc. (MPWR) · filed Nov 28, 2025
- Accession no.
- 0001214659-25-017305
- Filed
- Nov 28, 2025
- Trade date
- Nov 26, 2025
- Filing delay
- 2 days
- Rule 10b5-1 plan
- Not checked
This filing lists 9 non-derivative transactions. Open-market sales total $18.5M. It was filed 2 days 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 |
|---|---|
| Tseng SariaCIK 0001312593 | Officer (EVP & General Counsel) |
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 26, 2025 | Common Stock | SSaleDisposed | −240 | $922.78F1 | −$221,467.2 | 187,091 | Direct | |
| Nov 26, 2025 | Common Stock | SSaleDisposed | −1,200 | $923.54F2 | −$1,108,248 | 185,891 | Direct | |
| Nov 26, 2025 | Common Stock | SSaleDisposed | −1,327 | $924.32F3 | −$1,226,572.64 | 184,564 | Direct | |
| Nov 26, 2025 | Common Stock | SSaleDisposed | −1,126 | $925.55F4 | −$1,042,169.3 | 183,438 | Direct | |
| Nov 26, 2025 | Common Stock | SSaleDisposed | −10,360 | $926.02F5 | −$9,593,567.2 | 173,078 | Direct | |
| Nov 26, 2025 | Common Stock | SSaleDisposed | −1,845 | $927.41F6 | −$1,711,071.45 | 171,233 | Direct | |
| Nov 26, 2025 | Common Stock | SSaleDisposed | −984 | $928.60F7 | −$913,742.4 | 170,249 | Direct | |
| Nov 26, 2025 | Common Stock | SSaleDisposed | −2,238 | $929.29F8 | −$2,079,751.02 | 168,011 | Direct | |
| Nov 26, 2025 | Common Stock | SSaleDisposed | −680 | $930.48F9 | −$632,726.4 | 167,331 | 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 $922.42 to $922.94. 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.
- 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 $923.11 to $923.98. 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.
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 $924.00 to $924.83. 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 $925.18 to $925.82. 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 $926.00 to $926.63. 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 $927.01 to $927.86. 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 $928.40 to $928.98. 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.
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 $929.00 to $929.72. 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 $930.01 to $930.98. 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.
Referenced by the price of 1 transaction in Table I.