MPWR Shares Surge 5.1% on Q4 Beat and Q1 Outlook; Year-to-Date Up 30.2%

Monolithic Power Systems (NASDAQ:MPWR) rose 5.1% in afternoon trading after reporting Q4 revenue of $751.2M, up 20.8% YoY, and adjusted EPS of $4.79 that beat estimates. The company guided to $780M midpoint for Q1 2026, 5.7% above consensus, despite higher inventory, reflecting confidence in demand. The stock is volatile, with 28 moves exceeding 5% over the past year, and is up 30.2% YTD, reaching a new 52-week high at $1,219. Positive macro tailwinds continued from ASML’s €32.7B 2025 sales and €9.6B net income, including “blowout orders” and an upbeat 2026 forecast, signaling robust advanced chip demand. Management at MPWR expects 30%–40% growth in enterprise data for 2026.