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MONOLITHIC POWER SYSTEMS INC — Director's Dealing 2025
Sep 4, 2025
30057_dirs_2025-09-03_17b18d45-1b51-4bf2-9fc4-f9dced704044.zip
Director's Dealing
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SEC Form 4 — Statement of Changes in Beneficial Ownership
Issuer: MONOLITHIC POWER SYSTEMS INC (MPWR)
CIK: 0001280452
Period of Report: 2025-09-02
Reporting Person: BLEGEN THEODORE (N/A)
Non-Derivative Transactions
| Date | Security | Code | Shares | Price | A/D | Holdings After | Ownership |
|---|---|---|---|---|---|---|---|
| 2025-09-02 | Common Stock | S | 100 | $803.43 | Disposed | 43839 | Direct |
| 2025-09-02 | Common Stock | S | 100 | $804.64 | Disposed | 43739 | Direct |
| 2025-09-02 | Common Stock | S | 200 | $806.57 | Disposed | 43539 | Direct |
| 2025-09-02 | Common Stock | S | 100 | $808.53 | Disposed | 43439 | Direct |
| 2025-09-02 | Common Stock | S | 500 | $811.45 | Disposed | 42939 | Direct |
| 2025-09-02 | Common Stock | S | 100 | $812.84 | Disposed | 42839 | Direct |
| 2025-09-02 | Common Stock | S | 100 | $813.09 | Disposed | 42739 | Direct |
| 2025-09-02 | Common Stock | S | 200 | $814.75 | Disposed | 42539 | Direct |
| 2025-09-02 | Common Stock | S | 400 | $815.39 | Disposed | 42139 | Direct |
| 2025-09-02 | Common Stock | S | 574 | $816.47 | Disposed | 41565 | Direct |
| 2025-09-02 | Common Stock | S | 100 | $818.44 | Disposed | 41465 | Direct |
| 2025-09-02 | Common Stock | S | 200 | $820.70 | Disposed | 41265 | Direct |
| 2025-09-02 | Common Stock | S | 200 | $821.75 | Disposed | 41065 | Direct |
| 2025-09-02 | Common Stock | S | 126 | $822.59 | Disposed | 40939 | Direct |
Holdings (Non-Derivative)
| Security | Shares | Ownership |
|---|---|---|
| Common Stock | 5331 | Indirect |
| Common Stock | 5331 | Indirect |
Footnotes
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.