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MONOLITHIC POWER SYSTEMS INC — Director's Dealing 2025
Dec 29, 2025
30057_dirs_2025-12-29_82963b49-1d73-45a5-9da3-68dcfb54206c.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: 2025-12-24
Reporting Person: Lee Victor K (N/A)
Non-Derivative Transactions
| Date | Security | Code | Shares | Price | A/D | Holdings After | Ownership |
|---|---|---|---|---|---|---|---|
| 2025-12-24 | Common Stock | S | 197 | $949.70 | Disposed | 29370 | Direct |
| 2025-12-24 | Common Stock | S | 280 | $950.64 | Disposed | 29090 | Direct |
| 2025-12-24 | Common Stock | S | 160 | $951.60 | Disposed | 28930 | Direct |
| 2025-12-24 | Common Stock | S | 83 | $952.37 | Disposed | 28847 | Direct |
| 2025-12-24 | Common Stock | S | 200 | $953.70 | Disposed | 28647 | Direct |
| 2025-12-24 | Common Stock | S | 80 | $955.08 | Disposed | 28567 | Direct |
Footnotes
F1: These transactions were made pursuant to a Rule 10b5-1 trading plan adopted by the reporting person on 8/25/2025.
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 $949.23 to $949.98. 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.
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 $950.30 to $950.90. 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 $951.24 to $951.84. 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 $952.23 to $952.76. 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.
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 $953.31 to $953.99. 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.
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 $955.05 to $955.10. 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.