MPS Q3 revenue tops $1.2B for first time, up 63% YoY; GAAP EPS $5.51, non-GAAP $8.19

MONOLITHIC POWER SYSTEMS INC

• Revenue $1,202.4M, up 22.6% QoQ and 63.1% YoY, first quarter above $1B; GAAP diluted EPS $5.51, non-GAAP $8.19.
• Enterprise Data revenue $506.7M rose 33.2% QoQ and 164.6% YoY, 42.1% of total; Communications $187.4M rose 42.5% QoQ and 134.7% YoY.
• Q4 2026 outlook: revenue $1.315B-$1.385B, non-GAAP gross margin 55.5%-56.1%, GAAP opex $334M-$342M, non-GAAP tax rate 15%.
• Board named Tony Balow VP/CFO and Robert Dean VP/CAO effective Oct 27, 2026; Balow was VP Finance, Dean had been interim CFO since Feb 2026.
• Q3 stock repurchases $453.4M vs $4.0M in Q2; board added $500M authorization, bringing total current authorization to $1B.