Tseng Saria's Form 4 filing
Monolithic Power Systems, Inc. (MPWR) · filed Apr 1, 2026
- Accession no.
- 0001214659-26-004185
- Filed
- Apr 1, 2026
- Trade date
- Mar 30, 2026
- Filing delay
- 2 days
- Rule 10b5-1 plan
- Checked
This filing lists 8 non-derivative transactions. Open-market sales total $25.9M. 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 |
|---|---|---|---|---|---|---|---|---|
| Mar 30, 2026 | Common Stock | SSaleDisposed | −5,154 | $1,000.81F2 | −$5,158,174.74 | 195,502 | Direct | |
| Mar 30, 2026 | Common Stock | SSaleDisposed | −9,080 | $1,005.18F4 | −$9,127,034.4 | 186,422 | Direct | |
| Mar 30, 2026 | Common Stock | SSaleDisposed | −3,360 | $1,009.63F5 | −$3,392,356.8 | 183,062 | Direct | |
| Mar 30, 2026 | Common Stock | SSaleDisposed | −3,194 | $1,017.22F6 | −$3,249,000.68 | 179,868 | Direct | |
| Mar 30, 2026 | Common Stock | SSaleDisposed | −2,200 | $1,023.00F7 | −$2,250,600 | 177,668 | Direct | |
| Mar 30, 2026 | Common Stock | SSaleDisposed | −2,440 | $1,029.21F8 | −$2,511,272.4 | 175,228 | Direct | |
| Mar 30, 2026 | Common Stock | SSaleDisposed | −166 | $1,035.60F9 | −$171,909.6 | 175,062 | Direct | |
| Mar 30, 2026 | Common Stock | SSaleDisposed | −80 | $1,041.12F10 | −$83,289.6 | 174,982 | 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.
- 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 $998.36 to $1,002.92. 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.
- 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 $1,003.06 to $1,007.85. 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 $1,008.00 to $1,012.65. 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 $1,013.83 to $1,018.85. 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 $1,020.71 to $1,025.36. 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 $1,027.37 to $1,032.40. 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 $1,033.98 to $1,037.25. 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 $1,039.30 to $1,042.50. 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.