| Name | Relationship | Address | Signature | Signature date | CIK |
|---|---|---|---|---|---|
| BLEGEN THEODORE | EVP and CFO | 5808 LAKE WASHINGTON BLVD NE, KIRKLAND | /s/ Saria Tseng, attorney-in-fact for Mr. Bernie Blegen | 2025-11-04 | 0001415033 |
| Type | Sym | Class | Transaction | Value $ | Shares | Change % | * Price $ | Shares After | Date | Ownership | Footnotes |
|---|---|---|---|---|---|---|---|---|---|---|---|
| transaction | MPWR | Common Stock | Sale | -$207K | -204 | -0.26% | $1,013.62 | 77.1K | Nov 3, 2025 | Direct | F1, F2 |
| transaction | MPWR | Common Stock | Sale | -$137K | -135 | -0.18% | $1,014.47 | 77K | Nov 3, 2025 | Direct | F1, F3 |
| transaction | MPWR | Common Stock | Sale | -$81.3K | -80 | -0.1% | $1,016.51 | 76.9K | Nov 3, 2025 | Direct | F1, F4 |
| transaction | MPWR | Common Stock | Sale | -$6.11K | -6 | -0.01% | $1,017.78 | 76.9K | Nov 3, 2025 | Direct | F1 |
| transaction | MPWR | Common Stock | Sale | -$183K | -180 | -0.23% | $1,018.01 | 76.7K | Nov 3, 2025 | Direct | F1 |
| transaction | MPWR | Common Stock | Sale | -$185K | -181 | -0.24% | $1,019.49 | 76.5K | Nov 3, 2025 | Direct | F1, F5 |
| transaction | MPWR | Common Stock | Sale | -$163K | -160 | -0.21% | $1,020.30 | 76.4K | Nov 3, 2025 | Direct | F1, F6 |
| transaction | MPWR | Common Stock | Sale | -$172K | -168 | -0.22% | $1,021.28 | 76.2K | Nov 3, 2025 | Direct | F1, F7 |
| transaction | MPWR | Common Stock | Sale | -$40.9K | -40 | -0.05% | $1,022.28 | 76.2K | Nov 3, 2025 | Direct | F1 |
| transaction | MPWR | Common Stock | Sale | -$298K | -291 | -0.38% | $1,023.32 | 75.9K | Nov 3, 2025 | Direct | F1, F8 |
| transaction | MPWR | Common Stock | Sale | -$213K | -208 | -0.27% | $1,024.86 | 75.7K | Nov 3, 2025 | Direct | F1, F9 |
| transaction | MPWR | Common Stock | Sale | -$44.1K | -43 | -0.06% | $1,025.91 | 75.6K | Nov 3, 2025 | Direct | F1, F10 |
| transaction | MPWR | Common Stock | Sale | -$205K | -200 | -0.26% | $1,027.49 | 75.4K | Nov 3, 2025 | Direct | F1, F11 |
| transaction | MPWR | Common Stock | Sale | -$247K | -240 | -0.32% | $1,028.43 | 75.2K | Nov 3, 2025 | Direct | F1, F12 |
| transaction | MPWR | Common Stock | Sale | -$253K | -246 | -0.33% | $1,029.45 | 75K | Nov 3, 2025 | Direct | F1, F13 |
| transaction | MPWR | Common Stock | Sale | -$216K | -210 | -0.28% | $1,030.00 | 74.7K | Nov 3, 2025 | Direct | F1 |
| transaction | MPWR | Common Stock | Sale | -$17.5K | -17 | -0.02% | $1,031.86 | 74.7K | Nov 3, 2025 | Direct | F1 |
| transaction | MPWR | Common Stock | Sale | -$190K | -184 | -0.25% | $1,032.07 | 74.5K | Nov 3, 2025 | Direct | F1, F14 |
| transaction | MPWR | Common Stock | Sale | -$82.6K | -80 | -0.11% | $1,033.00 | 74.5K | Nov 3, 2025 | Direct | F1 |
| transaction | MPWR | Common Stock | Sale | -$41.4K | -40 | -0.05% | $1,034.99 | 74.4K | Nov 3, 2025 | Direct | F1 |
| transaction | MPWR | Common Stock | Sale | -$41.4K | -40 | -0.05% | $1,035.25 | 74.4K | Nov 3, 2025 | Direct | F1 |
| transaction | MPWR | Common Stock | Sale | -$48.8K | -47 | -0.06% | $1,038.41 | 74.3K | Nov 3, 2025 | Direct | F1, F15 |
| holding | MPWR | Common Stock | 5.33K | Nov 3, 2025 | Irrevocable Trust FBO Sarah N. Blegen | ||||||
| holding | MPWR | Common Stock | 5.33K | Nov 3, 2025 | Irrevocable Trust FBO Theodore F. Blegen |
Buy Plan / Sale Plan: These are also open market purchases/sales of shares, but in this case the transaction is part of a trading plan. Rule 10b5-1 allows insiders to setup a trading plan to buy/sell stocks over a certain period of time. Since the purchases/sales are predetermined, this protects the insiders from violating insider trading law.
Transaction was made pursuant to a contract, instruction or written plan for the purchase or sale of equity securities of the issuer that is intended to satisfy the affirmative defense conditions of Rule 10b5-1(c).
| Id | Content |
|---|---|
| F1 | These transactions were made pursuant to a Rule 10b5-1 trading plan adopted by the reporting person on 2/26/2025. |
| 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. |
| 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. |
| 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. |
| 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. |
| 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. |
| 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. |
| 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. |
| 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. |
| 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. |
| 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. |
| 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. |
| 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. |
| 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. |
| 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. |