Tseng Saria's Form 4 filing
Monolithic Power Systems, Inc. (MPWR) · filed Apr 8, 2026
- Accession no.
- 0001214659-26-004460
- Filed
- Apr 8, 2026
- Trade date
- Apr 6, 2026
- Filing delay
- 2 days
- Rule 10b5-1 plan
- Checked
This filing lists 8 non-derivative transactions. Open-market sales total $8.92M. 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 6, 2026 | Common Stock | SSaleDisposed | −244 | $1,139.96F2 | −$278,150.24 | 173,338 | Direct | |
| Apr 6, 2026 | Common Stock | SSaleDisposed | −556 | $1,144.42F3 | −$636,297.52 | 172,782 | Direct | |
| Apr 6, 2026 | Common Stock | SSaleDisposed | −480 | $1,149.05F4 | −$551,544 | 172,302 | Direct | |
| Apr 6, 2026 | Common Stock | SSaleDisposed | −560 | $1,159.62F5 | −$649,387.2 | 171,742 | Direct | |
| Apr 6, 2026 | Common Stock | SSaleDisposed | −684 | $1,165.66F6 | −$797,311.44 | 171,058 | Direct | |
| Apr 6, 2026 | Common Stock | SSaleDisposed | −2,036 | $1,170.38F7 | −$2,382,893.68 | 169,022 | Direct | |
| Apr 6, 2026 | Common Stock | SSaleDisposed | −1,680 | $1,176.35F8 | −$1,976,268 | 167,342 | Direct | |
| Apr 6, 2026 | Common Stock | SSaleDisposed | −1,396 | $1,179.50F9 | −$1,646,582 | 165,946 | 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 $1,136.69 to $1,141.64. 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.
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 $1,141.91 to $ 1,146.02. 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 $1,147.58 to $1,152.19. 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 $1,156.58 to $1,161.42. 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 $1,163.16 to $1,168.12. 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 $1,168.24 to $ 1,172.42. 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 $1,173.31 to $1,178.29. 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 $1,178.53 to $1,180.83. 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.