Hsing Michael's Form 4 filing
Monolithic Power Systems, Inc. (MPWR) · filed Aug 18, 2025
- Accession no.
- 0001214659-25-012411
- Filed
- Aug 18, 2025
- Trade date
- Aug 15, 2025
- Filing delay
- 3 days
- Rule 10b5-1 plan
- Not checked
This filing lists 11 non-derivative transactions. Open-market sales total $16.8M. It was filed 3 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 |
|---|---|
| Hsing MichaelCIK 0001308676 | Director, Officer (CEO) |
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 |
|---|---|---|---|---|---|---|---|---|
| Aug 15, 2025 | Common Stock | SSaleDisposed | −2,603 | $825.69F1 | −$2,149,271.07 | 832,295 | Direct | |
| Aug 15, 2025 | Common Stock | SSaleDisposed | −2,555 | $826.64F2 | −$2,112,065.2 | 829,740 | Direct | |
| Aug 15, 2025 | Common Stock | SSaleDisposed | −3,878 | $827.72F3 | −$3,209,898.16 | 825,862 | Direct | |
| Aug 15, 2025 | Common Stock | SSaleDisposed | −396 | $828.64F4 | −$328,141.44 | 825,466 | Direct | |
| Aug 15, 2025 | Common Stock | SSaleDisposed | −4,101 | $829.45F5 | −$3,401,574.45 | 821,365 | Direct | |
| Aug 15, 2025 | Common Stock | SSaleDisposed | −2,100 | $830.46F6 | −$1,743,966 | 819,265 | Direct | |
| Aug 15, 2025 | Common Stock | SSaleDisposed | −1,953 | $831.57F7 | −$1,624,056.21 | 817,312 | Direct | |
| Aug 15, 2025 | Common Stock | SSaleDisposed | −1,510 | $832.57F8 | −$1,257,180.7 | 815,802 | Direct | |
| Aug 15, 2025 | Common Stock | SSaleDisposed | −535 | $833.37F9 | −$445,852.95 | 815,267 | Direct | |
| Aug 15, 2025 | Common Stock | SSaleDisposed | −200 | $834.92 | −$166,984 | 815,067 | Direct | |
| Aug 15, 2025 | Common Stock | SSaleDisposed | −400 | $836.40F10 | −$334,560 | 814,667 | 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 $825.06 to $825.86. 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.
- 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 $826.12 to $826.98. 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 $827.06 to $827.98. 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.
- 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 $828.07 to $828.84. 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 $829.23 to $829.86. 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.
- 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 $830.01 to $830.97. 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.
- 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 $831.00 to $831.87. 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 $832.05 to $832.90. 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 $833.20 to $833.50. 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.
- 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 $836.11 to $836.50. 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.