Eugen J. Elmiger - Aug 29, 2025 Form 4 Insider Report for MONOLITHIC POWER SYSTEMS INC (MPWR)

Role
Director
Signature
/s/ Saria Tseng, attorney-in-fact for Mr. Eugen J. Elmiger
Stock symbol
MPWR
Transactions as of
Aug 29, 2025
Transactions value $
-$3,386,841
Form type
4
Date filed
9/2/2025, 04:04 PM
Previous filing
Feb 6, 2025
SEC
View on sec.gov

Reporting Owners (1)

Name Relationship Address Signature Signature date CIK
Elmiger Eugen J Director 5808 LAKE WASHINGTON BLVD NE, KIRKLAND /s/ Saria Tseng, attorney-in-fact for Mr. Eugen J. Elmiger 2025-08-29 0001560945

Transactions Table

Type Sym Class Transaction Value $ Shares Change % * Price $ Shares After Date Ownership Footnotes
transaction MPWR Common Stock Sale -$675K -800 -3.77% $844.25 20.4K Aug 29, 2025 Direct F1
transaction MPWR Common Stock Sale -$592K -700 -3.43% $845.54 19.7K Aug 29, 2025 Direct F2
transaction MPWR Common Stock Sale -$593K -700 -3.55% $846.66 19K Aug 29, 2025 Direct F3
transaction MPWR Common Stock Sale -$763K -900 -4.73% $847.30 18.1K Aug 29, 2025 Direct F4
transaction MPWR Common Stock Sale -$84.8K -100 -0.55% $848.03 18K Aug 29, 2025 Direct
transaction MPWR Common Stock Sale -$680K -800 -4.44% $849.41 17.2K Aug 29, 2025 Direct
* An asterisk sign (*) next to the price indicates that the price is likely invalid.

Explanation of Responses:

Id Content
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.