Blegen Theodore's Form 4 filing
Monolithic Power Systems, Inc. (MPWR) · filed Oct 1, 2025
- Accession no.
- 0001214659-25-014464
- Filed
- Oct 1, 2025
- Trade date
- Oct 1, 2025
- Filing delay
- Same day
- Rule 10b5-1 plan
- Checked
This filing lists 13 non-derivative transactions. Open-market sales total $2.74M. It was filed on the trade date.
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 |
|---|---|---|---|---|---|---|---|---|
| Oct 1, 2025 | Common Stock | SSaleDisposed | −6 | $902.61 | −$5,415.66 | 40,933 | Direct | |
| Oct 1, 2025 | Common Stock | SSaleDisposed | −40 | $903.82 | −$36,152.8 | 40,893 | Direct | |
| Oct 1, 2025 | Common Stock | SSaleDisposed | −60 | $904.00 | −$54,240 | 40,833 | Direct | |
| Oct 1, 2025 | Common Stock | SSaleDisposed | −115 | $905.37F2 | −$104,117.55 | 40,718 | Direct | |
| Oct 1, 2025 | Common Stock | SSaleDisposed | −250 | $907.36F3 | −$226,840 | 40,468 | Direct | |
| Oct 1, 2025 | Common Stock | SSaleDisposed | −80 | $909.52F4 | −$72,761.6 | 40,388 | Direct | |
| Oct 1, 2025 | Common Stock | SSaleDisposed | −65 | $911.27F5 | −$59,232.55 | 40,323 | Direct | |
| Oct 1, 2025 | Common Stock | SSaleDisposed | −676 | $912.73F6 | −$617,005.48 | 39,647 | Direct | |
| Oct 1, 2025 | Common Stock | SSaleDisposed | −138 | $913.87F7 | −$126,114.06 | 39,509 | Direct | |
| Oct 1, 2025 | Common Stock | SSaleDisposed | −390 | $914.71F8 | −$356,736.9 | 39,119 | Direct | |
| Oct 1, 2025 | Common Stock | SSaleDisposed | −440 | $915.43F9 | −$402,789.2 | 38,679 | Direct | |
| Oct 1, 2025 | Common Stock | SSaleDisposed | −580 | $916.37F10 | −$531,494.6 | 38,099 | Direct | |
| Oct 1, 2025 | Common Stock | SSaleDisposed | −160 | $917.17F11 | −$146,747.2 | 37,940 | 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 $905.35 to $905.40. 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 $907.30 to $907.37. 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 $909.22 to $909.82. 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 $911.04 to $911.66. 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 $912.39 to $912.82. 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 $913.84 to $913.87. 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 $914.59 to $914.77. 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.
- 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 $915.01 to $915.68. 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 $916.09 to $916.49. 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 $917.08 to $917.28. 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.