MONOLITHIC POWER SYSTEMS, INC. 4

EVP & General Counsel Saria Tseng transferred 2,000 shares of Monolithic Power Systems, Inc. common stock from her direct ownership to the C&T Family Irrevocable Trust as a non-cash internal transfer.

On August 31, 2026, Saria Tseng, EVP & General Counsel of Monolithic Power Systems, Inc., effected an internal transfer of 2,000 shares of common stock from her direct holdings to the C&T Family Irrevocable Trust, for which she serves as trustee. The transaction is coded as a Form 4 Type G (bona fide gift or transfer) and explicitly states that no funds were exchanged and no sale occurred. Following the transfer, Tseng’s direct ownership decreased to 142,218 shares while indirect ownership through the C&T Family Trust increased to 2,000 shares, with an additional 1,000 shares held indirectly via the C&T Discovery Foundation, leaving her overall economic exposure to the issuer essentially unchanged.

Filing Facts

CIK

1280452

Ticker

MPWR

Form

4

Source Type

sec

Accession

0001214659-26-011363

Alert Tier

6