Blegen Theodore's Form 4 filing
Monolithic Power Systems, Inc. (MPWR) · filed Nov 4, 2025
- Accession no.
- 0001214659-25-015933
- Filed
- Nov 4, 2025
- Trade date
- Nov 3, 2025
- Filing delay
- 1 day
- Rule 10b5-1 plan
- Checked
This filing lists 22 non-derivative transactions. Open-market sales total $3.07M. 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 |
|---|---|---|---|---|---|---|---|---|
| Nov 3, 2025 | Common Stock | SSaleDisposed | −204 | $1,013.62F2 | −$206,778.48 | 77,128 | Direct | |
| Nov 3, 2025 | Common Stock | SSaleDisposed | −135 | $1,014.47F3 | −$136,953.45 | 76,993 | Direct | |
| Nov 3, 2025 | Common Stock | SSaleDisposed | −80 | $1,016.51F4 | −$81,320.8 | 76,913 | Direct | |
| Nov 3, 2025 | Common Stock | SSaleDisposed | −6 | $1,017.78 | −$6,106.68 | 76,907 | Direct | |
| Nov 3, 2025 | Common Stock | SSaleDisposed | −180 | $1,018.01 | −$183,241.8 | 76,727 | Direct | |
| Nov 3, 2025 | Common Stock | SSaleDisposed | −181 | $1,019.49F5 | −$184,527.69 | 76,546 | Direct | |
| Nov 3, 2025 | Common Stock | SSaleDisposed | −160 | $1,020.30F6 | −$163,248 | 76,386 | Direct | |
| Nov 3, 2025 | Common Stock | SSaleDisposed | −168 | $1,021.28F7 | −$171,575.04 | 76,218 | Direct | |
| Nov 3, 2025 | Common Stock | SSaleDisposed | −40 | $1,022.28 | −$40,891.2 | 76,178 | Direct | |
| Nov 3, 2025 | Common Stock | SSaleDisposed | −291 | $1,023.32F8 | −$297,786.12 | 75,887 | Direct | |
| Nov 3, 2025 | Common Stock | SSaleDisposed | −208 | $1,024.86F9 | −$213,170.88 | 75,679 | Direct | |
| Nov 3, 2025 | Common Stock | SSaleDisposed | −43 | $1,025.91F10 | −$44,114.13 | 75,636 | Direct | |
| Nov 3, 2025 | Common Stock | SSaleDisposed | −200 | $1,027.49F11 | −$205,498 | 75,436 | Direct | |
| Nov 3, 2025 | Common Stock | SSaleDisposed | −240 | $1,028.43F12 | −$246,823.2 | 75,196 | Direct | |
| Nov 3, 2025 | Common Stock | SSaleDisposed | −246 | $1,029.45F13 | −$253,244.7 | 74,950 | Direct | |
| Nov 3, 2025 | Common Stock | SSaleDisposed | −210 | $1,030.00 | −$216,300 | 74,740 | Direct | |
| Nov 3, 2025 | Common Stock | SSaleDisposed | −17 | $1,031.86 | −$17,541.62 | 74,723 | Direct | |
| Nov 3, 2025 | Common Stock | SSaleDisposed | −184 | $1,032.07F14 | −$189,900.88 | 74,539 | Direct | |
| Nov 3, 2025 | Common Stock | SSaleDisposed | −80 | $1,033.00 | −$82,640 | 74,459 | Direct | |
| Nov 3, 2025 | Common Stock | SSaleDisposed | −40 | $1,034.99 | −$41,399.6 | 74,419 | Direct | |
| Nov 3, 2025 | Common Stock | SSaleDisposed | −40 | $1,035.25 | −$41,410 | 74,379 | Direct | |
| Nov 3, 2025 | Common Stock | SSaleDisposed | −47 | $1,038.41F15 | −$48,805.27 | 74,332 | 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 $1,013.45 to $1,013.75. 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 $1,014.12 to $1,014.64. 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 $1,016.43 to $1,016.59. 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 $1,019.10 to $1,019.68. 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.
- 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 $1,020.20 to $1,020.40. 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.
- 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 $1,021.04 to $1,021.32. 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 $1,023.07 to $1,023.98. 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.
- 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 $1,024.02 to $1,024.99. 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 $1,025.00 to $1,025.98. 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.
- 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 $1,027.03 to $1,027.89. 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.
- 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 $1,028.00 to $1,028.85. 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.
- 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 $1,029.14 to $1,029.77. 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 $1,032.00 to $1,032.18. 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 $1,038.40 to $1,038.42. 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.