Mr. Deming Xiao - 06 Feb 2026 Form 4 Insider Report for MONOLITHIC POWER SYSTEMS INC (MPWR)

Role
EVP, Global Operations
Signature
/s/ Saria Tseng, attorney-in-fact for Mr. Deming Xiao
Issuer symbol
MPWR
Transactions as of
06 Feb 2026
Net transactions value
-$26,790,370
Form type
4
Filing time
10 Feb 2026, 18:59:14 UTC
Previous filing
05 Feb 2026
SEC
View on sec.gov

Reporting Owners (1)

Name Relationship Address Signature Signature date CIK
Xiao Deming EVP, Global Operations 1555 PALM BEACH LAKES BLVD., WEST PALM BEACH /s/ Saria Tseng, attorney-in-fact for Mr. Deming Xiao 10 Feb 2026 0001308647

Transactions Table

Type Sym Class Transaction Value $ Shares Change % * Price $ Shares After Date Ownership Footnotes
transaction MPWR Common Stock Sale $26,790,370 -22,875 -8.8% $1171.16 235,932 06 Feb 2026 Direct F1
holding MPWR Common Stock 20,455 06 Feb 2026 by Spouse
holding MPWR Common Stock 4,336 06 Feb 2026 Christopher Chao Xiao Trust
* An asterisk sign (*) next to the price indicates that the price is likely invalid.

Explanation of Responses:

Id Content
F1 The reported sales were to cover taxes upon the release of restricted stock units, as required by the Company's equity incentive plan.