Hsing Michael's Form 4 filing
Monolithic Power Systems, Inc. (MPWR) · filed Nov 13, 2025
- Accession no.
- 0001214659-25-016420
- Filed
- Nov 13, 2025
- Trade date
- Nov 12, 2025
- Filing delay
- 1 day
- Rule 10b5-1 plan
- Not checked
This filing lists 19 non-derivative transactions. Open-market sales total $35.7M. It was filed 1 day 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 12, 2025 | Common Stock | SSaleDisposed | −403 | $957.58F1 | −$385,904.74 | 955,266 | Direct | |
| Nov 12, 2025 | Common Stock | SSaleDisposed | −2,799 | $958.34F2 | −$2,682,393.66 | 952,467 | Direct | |
| Nov 12, 2025 | Common Stock | SSaleDisposed | −440 | $959.36F3 | −$422,118.4 | 952,027 | Direct | |
| Nov 12, 2025 | Common Stock | SSaleDisposed | −403 | $960.45F4 | −$387,061.35 | 951,624 | Direct | |
| Nov 12, 2025 | Common Stock | SSaleDisposed | −1,904 | $961.63F5 | −$1,830,943.52 | 949,720 | Direct | |
| Nov 12, 2025 | Common Stock | SSaleDisposed | −2,817 | $962.61F6 | −$2,711,672.37 | 946,903 | Direct | |
| Nov 12, 2025 | Common Stock | SSaleDisposed | −3,552 | $963.47F7 | −$3,422,245.44 | 943,351 | Direct | |
| Nov 12, 2025 | Common Stock | SSaleDisposed | −3,264 | $964.47F8 | −$3,148,030.08 | 940,087 | Direct | |
| Nov 12, 2025 | Common Stock | SSaleDisposed | −5,619 | $965.50F9 | −$5,425,144.5 | 934,468 | Direct | |
| Nov 12, 2025 | Common Stock | SSaleDisposed | −6,562 | $966.45F10 | −$6,341,844.9 | 927,906 | Direct | |
| Nov 12, 2025 | Common Stock | SSaleDisposed | −3,024 | $967.41F11 | −$2,925,447.84 | 924,882 | Direct | |
| Nov 12, 2025 | Common Stock | SSaleDisposed | −2,072 | $968.37F12 | −$2,006,462.64 | 922,810 | Direct | |
| Nov 12, 2025 | Common Stock | SSaleDisposed | −975 | $969.62F13 | −$945,379.5 | 921,835 | Direct | |
| Nov 12, 2025 | Common Stock | SSaleDisposed | −728 | $970.29F14 | −$706,371.12 | 921,107 | Direct | |
| Nov 12, 2025 | Common Stock | SSaleDisposed | −59 | $971.81F15 | −$57,336.79 | 921,048 | Direct | |
| Nov 12, 2025 | Common Stock | SSaleDisposed | −461 | $972.78F16 | −$448,451.58 | 920,587 | Direct | |
| Nov 12, 2025 | Common Stock | SSaleDisposed | −298 | $973.73F17 | −$290,171.54 | 920,289 | Direct | |
| Nov 12, 2025 | Common Stock | SSaleDisposed | −633 | $979.59F18 | −$620,080.47 | 919,656 | Direct | |
| Nov 12, 2025 | Common Stock | SSaleDisposed | −987 | $980.06F19 | −$967,319.22 | 918,669 | 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 $957.18 to $957.95. 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.
- 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 $958.06 to $958.88. 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 $959.01 to $959.56. 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.
- 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 $960.00 to $960.74. 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 $961.07 to $961.98. 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 $962.02 to $962.99. 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 $963.00 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.
- 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 $964.00 to $964.92. 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.
- 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 $965.00 to $965.98. 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.
- 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 $966.00 to $ 966.99. 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.
- 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 $967.00 to $967.93. 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.
- 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 $968.01 to $968.94. 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 $969.14 to $969.98. 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.
- 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 $970.02 to $970.85. 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.
- 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 $971.74 to $971.96. 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 $972.05 to $972.98. 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.
- F17
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 $973.45 to $973.84. 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.
- F18
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 $979.59 to $979.60. 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.
- F19
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 $980.00 to $980.25. 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.