Monolithic Power Systems (MPWR) Stock Jumps On Record EPS As Margin Questions Persist

The market rewarded Monolithic Power Systems with an 8.4% jump to about US$1,426, yet the real story sits inside a single theme. This quarter was about sheer earnings power. Q2 2026 revenue reached about US$980.6m and basic earnings per share came in at US$5.24, setting a new quarterly high for the company.

Coming into this print, the stock had cooled over the past three months. Today’s move shows investors are paying up for that growth, even as questions around margins and a rich P/E tag will linger in the background of any long term thesis.

Is Monolithic Power Systems now priced for perfection or already stretching past what the current fundamentals support? Compare the rich P/E and DCF gap with our valuation analysis for Monolithic Power Systems

Q2 2026 Earnings Summary

• Revenue (Q2 2026 vs Q2 2025): US$980.6m vs. US$664.6m (up about 47.5%)
• Net Income (Excl. Extra Items, Q2 2026 vs Q2 2025): US$257.3m vs. US$133.7m (up about 92.4%)
• Basic EPS (Q2 2026 vs Q2 2025): US$5.24 vs. US$2.79 (up about 87.7%)
• Trailing Net Profit Margin (Last 12 Months vs Prior Year): 24.5% vs. 65.6% a year earlier (margin percentage lower year on year)

Prefer clean charts instead of scrolling through walls of earnings tables and raw figures? Get a full visual read on how Monolithic Power Systems is being valued right now in the company report for Monolithic Power Systems.

Monolithic Power bullish story clears several key hurdles

Bulls argue Monolithic Power Systems can turn AI data center and automotive exposure into durable revenue growth with stronger margins from higher value solutions. Q2 gives that view some support. Enterprise data and communications are acting as genuine engines, with enterprise data highlighted as the primary growth driver and communications revenue up sharply quarter on quarter, helped by optical power modules and switch or DPU or SmartNIC content. Management raised its capacity ambition significantly beyond US$6b in future revenue support and is already shipping 48V vertical power modules to multiple customers. Record quarterly revenue of about US$980.6m and basic EPS of US$5.24, along with operating leverage from higher volumes, indicate the model is scaling. Automotive is not yet a second pillar, but mid teens full year growth guidance and 1,500 new sockets year to date point to progress against that milestone.

Bear case flags governance, margins and order risk

Skeptics focus on high expectations, governance overhangs and margin pressure. The Q2 print does not fully resolve those concerns. Trailing net profit margin over the last 12 months is 24.5%, far below the 65.6% level a year earlier, which means margin expansion is not yet on a clear upward path even as revenue and EPS set records. Restatement related investigations and allegations around Nvidia order cancellations remain live as of late July 2026, so customer concentration and disclosure risk still hang over the story. Heavy insider selling over recent months, with no offsetting insider purchases, sits uncomfortably alongside a rich P/E and an 8.4% price jump on the results. Management’s decision to push capacity significantly beyond US$6b and ramp complex module assembly increases execution risk if AI or automotive ramps do not match those ambitions.

Review whether margin compression, insider selling, and capacity bets are isolated. Then scan our risk analysis for Monolithic Power Systems which shows 2 important warning signs for deeper hidden vulnerabilities.

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This article by Simply Wall St is general in nature. We provide commentary based on historical data and analyst forecasts only using an unbiased methodology and our articles are not intended to be financial advice. It does not constitute a recommendation to buy or sell any stock, and does not take account of your objectives, or your financial situation. We aim to bring you long-term focused analysis driven by fundamental data. Note that our analysis may not factor in the latest price-sensitive company announcements or qualitative material. Simply Wall St has no position in any stocks mentioned.

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