Marvell Technology (MRVL) Surges 208% in Six Months to $304.87, but Valuation Looms

Marvell Technology shares have rallied 208% over the past six months to $304.87 as of June 5, 2026, propelled by strong quarterly results. The surge has prompted investor questions about whether the stock is overheated. The fabless semiconductor designer posted a 22.9% compound annual sales growth rate over the past five years, outpacing the average chipmaker. Its operating margin expanded by 19.8 percentage points in that period to 16% for the trailing 12 months, reflecting significant operating leverage. However, the company’s five-year average return on invested capital was negative 0.3%, signaling past difficulties in converting growth into profitability. With shares trading at 66.6 times forward earnings, the valuation leaves little room for missteps.