Hsing Michael's Form 4 filing
Monolithic Power Systems, Inc. (MPWR) · filed Nov 13, 2025
- Accession no.
- 0001214659-25-016419
- Filed
- Nov 13, 2025
- Trade date
- Nov 11, 2025
- Filing delay
- 2 days
- Rule 10b5-1 plan
- Not checked
This filing lists 17 non-derivative transactions. Open-market sales total $38.3M. 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 |
|---|---|
| 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 |
|---|---|---|---|---|---|---|---|---|
| Nov 11, 2025 | Common Stock | SSaleDisposed | −80 | $951.69 | −$76,135.2 | 995,589 | Direct | |
| Nov 11, 2025 | Common Stock | SSaleDisposed | −1,516 | $952.62F1 | −$1,444,171.92 | 994,073 | Direct | |
| Nov 11, 2025 | Common Stock | SSaleDisposed | −2,927 | $953.69F2 | −$2,791,450.63 | 991,146 | Direct | |
| Nov 11, 2025 | Common Stock | SSaleDisposed | −7,934 | $954.61F3 | −$7,573,875.74 | 983,212 | Direct | |
| Nov 11, 2025 | Common Stock | SSaleDisposed | −4,056 | $955.46F4 | −$3,875,345.76 | 979,156 | Direct | |
| Nov 11, 2025 | Common Stock | SSaleDisposed | −797 | $956.50F5 | −$762,330.5 | 978,359 | Direct | |
| Nov 11, 2025 | Common Stock | SSaleDisposed | −1,020 | $957.71F6 | −$976,864.2 | 977,339 | Direct | |
| Nov 11, 2025 | Common Stock | SSaleDisposed | −2,500 | $958.59F7 | −$2,396,475 | 974,839 | Direct | |
| Nov 11, 2025 | Common Stock | SSaleDisposed | −4,010 | $959.45F8 | −$3,847,394.5 | 970,829 | Direct | |
| Nov 11, 2025 | Common Stock | SSaleDisposed | −2,734 | $960.45F9 | −$2,625,870.3 | 968,095 | Direct | |
| Nov 11, 2025 | Common Stock | SSaleDisposed | −3,900 | $961.47F10 | −$3,749,733 | 964,195 | Direct | |
| Nov 11, 2025 | Common Stock | SSaleDisposed | −4,172 | $962.57F11 | −$4,015,842.04 | 960,023 | Direct | |
| Nov 11, 2025 | Common Stock | SSaleDisposed | −1,894 | $963.41F12 | −$1,824,698.54 | 958,129 | Direct | |
| Nov 11, 2025 | Common Stock | SSaleDisposed | −739 | $964.38F13 | −$712,676.82 | 957,390 | Direct | |
| Nov 11, 2025 | Common Stock | SSaleDisposed | −321 | $965.44F14 | −$309,906.24 | 957,069 | Direct | |
| Nov 11, 2025 | Common Stock | SSaleDisposed | −1,246 | $966.30F15 | −$1,204,009.8 | 955,823 | Direct | |
| Nov 11, 2025 | Common Stock | SSaleDisposed | −154 | $967.15F16 | −$148,941.1 | 955,669 | 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 $952.05 to $952.98. 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.
- 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 $953.14 to $953.99. 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 $954.00 to $954.98. 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 $955.13 to $955.93. 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 $956.00 to $956.98. 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.
- 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 $957.00 to $957.99. 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 $958.13 to $958.99. 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 $959.00 to $959.95. 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 $960.00 to $960.99. 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 $961.00 to $961.95. 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 $962.00 to $962.97. 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.
- F12
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 $963.08 to $963.99. 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.
- F13
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 $964.00 to $964.77. 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.
- F14
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 $965.36 to $965.63. 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.
- F15
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 $966.06 to $966.80. 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.
- F16
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 $967.14 to $967.17. 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.