Tseng Saria's Form 4 filing
Monolithic Power Systems, Inc. (MPWR) · filed Apr 10, 2026
- Accession no.
- 0001214659-26-004535
- Filed
- Apr 10, 2026
- Trade date
- Apr 8, 2026
- Filing delay
- 2 days
- Rule 10b5-1 plan
- Checked
This filing lists 10 non-derivative transactions. Open-market sales total $11.7M. 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 |
|---|---|---|---|---|---|---|---|---|
| Apr 8, 2026 | Common Stock | SSaleDisposed | −560 | $1,266.48F2 | −$709,228.8 | 165,386 | Direct | |
| Apr 8, 2026 | Common Stock | SSaleDisposed | −360 | $1,270.29F3 | −$457,304.4 | 165,026 | Direct | |
| Apr 8, 2026 | Common Stock | SSaleDisposed | −240 | $1,279.55F4 | −$307,092 | 164,786 | Direct | |
| Apr 8, 2026 | Common Stock | SSaleDisposed | −120 | $1,287.12F5 | −$154,454.4 | 164,666 | Direct | |
| Apr 8, 2026 | Common Stock | SSaleDisposed | −400 | $1,292.08F6 | −$516,832 | 164,266 | Direct | |
| Apr 8, 2026 | Common Stock | SSaleDisposed | −800 | $1,302.52F7 | −$1,042,016 | 163,466 | Direct | |
| Apr 8, 2026 | Common Stock | SSaleDisposed | −1,279 | $1,308.30F8 | −$1,673,315.7 | 162,187 | Direct | |
| Apr 8, 2026 | Common Stock | SSaleDisposed | −4,244 | $1,312.82F9 | −$5,571,608.08 | 157,943 | Direct | |
| Apr 8, 2026 | Common Stock | SSaleDisposed | −840 | $1,319.25F10 | −$1,108,170 | 157,103 | Direct | |
| Apr 8, 2026 | Common Stock | SSaleDisposed | −120 | $1,321.94F11 | −$158,632.8 | 156,983 | 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 $1,264.04 to $1,268.56. 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 $1,269.36 to $1,272.23. 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 $1,277.78 to $1,281.49. 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 $1,284.26 to $1,289.24. 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 $1,290.95 to $1,294.78. 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 $1,299.99 to $1,304.82. 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.
- 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 $1,305.08 to $1,310.00. 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 $1,310.27 to $1,315.08. 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 $1,316.25 to $1,321.04. 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 $1,321.50 to $1,322.56. 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.