Monolithic Power Systems IncPremium valuation faces margin scrutiny; flat gross margin, rising inventory, and high short interest suggest caution.

Monolithic Power Systems is trading at a forward P/E of about 54, well above Analog Devices at roughly 26 and Texas Instruments at around 38, as investors price in years of AI-driven power-management growth. First-quarter 2026 revenue rose 26.1% year over year to a record $804.2 million, with adjusted EPS up 26.2% to $5.10, while the Enterprise Data segment—its AI server business—surged 97.7% and now drives nearly 80% of total revenue growth. Management raised its manufacturing capacity target from 4 billion to 6 billion units, signaling confidence in sustained demand, and the recent dismissal of the Bel Power Solutions lawsuit removed a legal overhang. However, gross margin was flat sequentially at 55.5% and lower than a year ago, inventory rose to $619.2 million with days increasing to 157 from 146, and short interest stands at 6.07% of float, above Analog Devices at 2.76% and Texas Instruments at 2.07%, suggesting caution around the premium valuation. Hedge fund holdings edged down to 49 from 50, while Analog Devices saw a sharp increase to 109 from 86, indicating stronger institutional conviction shifting toward the lower-multiple peer.
Monolithic Power Systems IncPremium valuation faces margin scrutiny; flat gross margin, rising inventory, and high short interest suggest caution.
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