MONOLITHIC POWER SYSTEMS, INC. 4

Interim CFO Robert W. Dean II sold 32 MPWR common shares (~$41.5K) to cover RSU tax withholding and transferred 5 shares at no cost to a non-family household member, leaving him with 7,089 directly owned shares.

On August 24, 2026, Interim CFO Robert W. Dean II of Monolithic Power Systems, Inc. reported two transactions in common stock. He sold 32 shares at a weighted average price of approximately $1,297.72, generating proceeds of about $41,527, with the sale explicitly identified as being solely to cover tax withholding obligations upon the vesting of restricted stock units. On the same date, he effected a journal transfer of 5 shares at $0.00 from his direct ownership to an unrelated individual, with no consideration exchanged and no continuing pecuniary interest retained in the transferred shares. Following these transactions, he directly owned 7,089 shares, and an additional 65 shares were held indirectly by a parent and daughter, leaving him with an estimated direct holding value of roughly $9.2 million based on the reported sale price.

Filing Facts

CIK

1280452

Ticker

MPWR

Form

4

Source Type

sec

Accession

0001214659-26-010932

Alert Tier

7