| 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 | 04 Nov 2025 | 0001415033 |
| Type | Sym | Class | Transaction | Value $ | Shares | Change % | * Price $ | Shares After | Date | Ownership | Footnotes |
|---|---|---|---|---|---|---|---|---|---|---|---|
| transaction | MPWR | Common Stock | Sale | $206,778 | -204 | -0.26% | $1013.62 | 77,128 | 03 Nov 2025 | Direct | F1, F2 |
| transaction | MPWR | Common Stock | Sale | $136,953 | -135 | -0.18% | $1014.47 | 76,993 | 03 Nov 2025 | Direct | F1, F3 |
| transaction | MPWR | Common Stock | Sale | $81,321 | -80 | -0.1% | $1016.51 | 76,913 | 03 Nov 2025 | Direct | F1, F4 |
| transaction | MPWR | Common Stock | Sale | $6,107 | -6 | -0.01% | $1017.78 | 76,907 | 03 Nov 2025 | Direct | F1 |
| transaction | MPWR | Common Stock | Sale | $183,242 | -180 | -0.23% | $1018.01 | 76,727 | 03 Nov 2025 | Direct | F1 |
| transaction | MPWR | Common Stock | Sale | $184,528 | -181 | -0.24% | $1019.49 | 76,546 | 03 Nov 2025 | Direct | F1, F5 |
| transaction | MPWR | Common Stock | Sale | $163,248 | -160 | -0.21% | $1020.30 | 76,386 | 03 Nov 2025 | Direct | F1, F6 |
| transaction | MPWR | Common Stock | Sale | $171,575 | -168 | -0.22% | $1021.28 | 76,218 | 03 Nov 2025 | Direct | F1, F7 |
| transaction | MPWR | Common Stock | Sale | $40,891 | -40 | -0.05% | $1022.28 | 76,178 | 03 Nov 2025 | Direct | F1 |
| transaction | MPWR | Common Stock | Sale | $297,786 | -291 | -0.38% | $1023.32 | 75,887 | 03 Nov 2025 | Direct | F1, F8 |
| transaction | MPWR | Common Stock | Sale | $213,171 | -208 | -0.27% | $1024.86 | 75,679 | 03 Nov 2025 | Direct | F1, F9 |
| transaction | MPWR | Common Stock | Sale | $44,114 | -43 | -0.06% | $1025.91 | 75,636 | 03 Nov 2025 | Direct | F1, F10 |
| transaction | MPWR | Common Stock | Sale | $205,498 | -200 | -0.26% | $1027.49 | 75,436 | 03 Nov 2025 | Direct | F1, F11 |
| transaction | MPWR | Common Stock | Sale | $246,823 | -240 | -0.32% | $1028.43 | 75,196 | 03 Nov 2025 | Direct | F1, F12 |
| transaction | MPWR | Common Stock | Sale | $253,245 | -246 | -0.33% | $1029.45 | 74,950 | 03 Nov 2025 | Direct | F1, F13 |
| transaction | MPWR | Common Stock | Sale | $216,300 | -210 | -0.28% | $1030.00 | 74,740 | 03 Nov 2025 | Direct | F1 |
| transaction | MPWR | Common Stock | Sale | $17,542 | -17 | -0.02% | $1031.86 | 74,723 | 03 Nov 2025 | Direct | F1 |
| transaction | MPWR | Common Stock | Sale | $189,901 | -184 | -0.25% | $1032.07 | 74,539 | 03 Nov 2025 | Direct | F1, F14 |
| transaction | MPWR | Common Stock | Sale | $82,640 | -80 | -0.11% | $1033.00 | 74,459 | 03 Nov 2025 | Direct | F1 |
| transaction | MPWR | Common Stock | Sale | $41,400 | -40 | -0.05% | $1034.99 | 74,419 | 03 Nov 2025 | Direct | F1 |
| transaction | MPWR | Common Stock | Sale | $41,410 | -40 | -0.05% | $1035.25 | 74,379 | 03 Nov 2025 | Direct | F1 |
| transaction | MPWR | Common Stock | Sale | $48,805 | -47 | -0.06% | $1038.41 | 74,332 | 03 Nov 2025 | Direct | F1, F15 |
| holding | MPWR | Common Stock | 5,331 | 03 Nov 2025 | Irrevocable Trust FBO Sarah N. Blegen | ||||||
| holding | MPWR | Common Stock | 5,331 | 03 Nov 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. |