| 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 | 02 Sep 2025 | 0001415033 |
| Type | Sym | Class | Transaction | Value $ | Shares | Change % | * Price $ | Shares After | Date | Ownership | Footnotes |
|---|---|---|---|---|---|---|---|---|---|---|---|
| transaction | MPWR | Common Stock | Sale | $80,343 | -100 | -0.23% | $803.43 | 43,839 | 02 Sep 2025 | Direct | F1 |
| transaction | MPWR | Common Stock | Sale | $80,464 | -100 | -0.23% | $804.64 | 43,739 | 02 Sep 2025 | Direct | F1 |
| transaction | MPWR | Common Stock | Sale | $161,314 | -200 | -0.46% | $806.57 | 43,539 | 02 Sep 2025 | Direct | F1, F2 |
| transaction | MPWR | Common Stock | Sale | $80,853 | -100 | -0.23% | $808.53 | 43,439 | 02 Sep 2025 | Direct | F1, F3 |
| transaction | MPWR | Common Stock | Sale | $405,725 | -500 | -1.2% | $811.45 | 42,939 | 02 Sep 2025 | Direct | F1, F4 |
| transaction | MPWR | Common Stock | Sale | $81,284 | -100 | -0.23% | $812.84 | 42,839 | 02 Sep 2025 | Direct | F1 |
| transaction | MPWR | Common Stock | Sale | $81,309 | -100 | -0.23% | $813.09 | 42,739 | 02 Sep 2025 | Direct | F1 |
| transaction | MPWR | Common Stock | Sale | $162,950 | -200 | -0.47% | $814.75 | 42,539 | 02 Sep 2025 | Direct | F1, F5 |
| transaction | MPWR | Common Stock | Sale | $326,156 | -400 | -0.94% | $815.39 | 42,139 | 02 Sep 2025 | Direct | F1, F6 |
| transaction | MPWR | Common Stock | Sale | $468,654 | -574 | -1.4% | $816.47 | 41,565 | 02 Sep 2025 | Direct | F1, F7 |
| transaction | MPWR | Common Stock | Sale | $81,844 | -100 | -0.24% | $818.44 | 41,465 | 02 Sep 2025 | Direct | F1 |
| transaction | MPWR | Common Stock | Sale | $164,140 | -200 | -0.48% | $820.70 | 41,265 | 02 Sep 2025 | Direct | F1, F8 |
| transaction | MPWR | Common Stock | Sale | $164,350 | -200 | -0.48% | $821.75 | 41,065 | 02 Sep 2025 | Direct | F1, F9 |
| transaction | MPWR | Common Stock | Sale | $103,646 | -126 | -0.31% | $822.59 | 40,939 | 02 Sep 2025 | Direct | F1, F10 |
| holding | MPWR | Common Stock | 5,331 | 02 Sep 2025 | Irrevocable Trust FBO Theodore F. Blegen | ||||||
| holding | MPWR | Common Stock | 5,331 | 02 Sep 2025 | Irrevocable Trust FBO Sarah N. 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 $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. |
| 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. |
| 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. |
| 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. |
| 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. |
| 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. |
| 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. |
| 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. |
| 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. |