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MONOLITHIC POWER SYSTEMS INC Director's Dealing 2025

Sep 2, 2025

30057_dirs_2025-09-02_114a6000-3dcd-4f01-9a48-efbbfcf3cc0d.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: 2025-08-29

Reporting Person: Elmiger Eugen J (N/A)

Non-Derivative Transactions

Date Security Code Shares Price A/D Holdings After Ownership
2025-08-29 Common Stock S 800 $844.25 Disposed 20413 Direct
2025-08-29 Common Stock S 700 $845.54 Disposed 19713 Direct
2025-08-29 Common Stock S 700 $846.66 Disposed 19013 Direct
2025-08-29 Common Stock S 900 $847.30 Disposed 18113 Direct
2025-08-29 Common Stock S 100 $848.03 Disposed 18013 Direct
2025-08-29 Common Stock S 800 $849.41 Disposed 17213 Direct

Footnotes

F1: 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 $844.00 to $844.62. 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.

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 $845.15 to $845.72. 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.

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 $846.16 to $846.97. 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 $847.19 to $847.44. 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.