MONOLITHIC POWER SYSTEMS, INC. 4

EVP Maurice Sciammas sold 20,268 shares of Monolithic Power Systems (MPWR) common stock on 2026-07-15 in multiple open‑market transactions totaling roughly $27.4 million under a Rule 10b5‑1 plan.

On July 15, 2026, Maurice Sciammas, EVP, WW Sales & Marketing of Monolithic Power Systems, Inc., executed a series of open‑market sales of the company’s common stock under a pre‑arranged Rule 10b5‑1 trading plan adopted on November 24, 2025. Across 18 separate price‑tiered trades, he sold an aggregate of 20,268 shares at weighted‑average prices ranging from approximately $1,314 to $1,406 per share, generating total proceeds of roughly $27.4 million. Following these sales, he continued to hold 151,644 shares directly (worth about $213 million at ~$1,405 per share) and had additional indirect holdings through multiple Sciammas family trusts and brokerage accounts, indicating that while the transaction represents a meaningful liquidity event, he retains a substantial equity stake in the issuer.

Filing Facts

CIK

1280452

Ticker

MPWR

Form

4

Source Type

sec

Accession

0001214659-26-008703

Alert Tier

9