Blegen Theodore's Form 4 filing
Monolithic Power Systems, Inc. (MPWR) · filed Sep 3, 2025
- Accession no.
- 0001214659-25-013303
- Filed
- Sep 3, 2025
- Trade date
- Sep 2, 2025
- Filing delay
- 1 day
- Rule 10b5-1 plan
- Checked
This filing lists 14 non-derivative transactions. Open-market sales total $2.44M. 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 |
|---|---|
| Blegen TheodoreCIK 0001415033 | Officer (EVP and CFO) |
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 |
|---|---|---|---|---|---|---|---|---|
| Sep 2, 2025 | Common Stock | SSaleDisposed | −100 | $803.43 | −$80,343 | 43,839 | Direct | |
| Sep 2, 2025 | Common Stock | SSaleDisposed | −100 | $804.64 | −$80,464 | 43,739 | Direct | |
| Sep 2, 2025 | Common Stock | SSaleDisposed | −200 | $806.57F2 | −$161,314 | 43,539 | Direct | |
| Sep 2, 2025 | Common Stock | SSaleDisposed | −100 | $808.53F3 | −$80,853 | 43,439 | Direct | |
| Sep 2, 2025 | Common Stock | SSaleDisposed | −500 | $811.45F4 | −$405,725 | 42,939 | Direct | |
| Sep 2, 2025 | Common Stock | SSaleDisposed | −100 | $812.84 | −$81,284 | 42,839 | Direct | |
| Sep 2, 2025 | Common Stock | SSaleDisposed | −100 | $813.09 | −$81,309 | 42,739 | Direct | |
| Sep 2, 2025 | Common Stock | SSaleDisposed | −200 | $814.75F5 | −$162,950 | 42,539 | Direct | |
| Sep 2, 2025 | Common Stock | SSaleDisposed | −400 | $815.39F6 | −$326,156 | 42,139 | Direct | |
| Sep 2, 2025 | Common Stock | SSaleDisposed | −574 | $816.47F7 | −$468,653.78 | 41,565 | Direct | |
| Sep 2, 2025 | Common Stock | SSaleDisposed | −100 | $818.44 | −$81,844 | 41,465 | Direct | |
| Sep 2, 2025 | Common Stock | SSaleDisposed | −200 | $820.70F8 | −$164,140 | 41,265 | Direct | |
| Sep 2, 2025 | Common Stock | SSaleDisposed | −200 | $821.75F9 | −$164,350 | 41,065 | Direct | |
| Sep 2, 2025 | Common Stock | SSaleDisposed | −126 | $822.59F10 | −$103,646.34 | 40,939 | 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 $806.25 to $806.89. 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 $808.38 to $808.63. 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.
- 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 $811.11 to $811.96. 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.
- 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 $814.61 to $814.88. 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.
- 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 $815.10 to $815.74. 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.
- 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 $816.20 to $816.76. 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 $820.50 to $820.88. 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.
- 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 $821.64 to $821.86. 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.
- 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 $822.31 to $822.72. 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.