Monolithic Power Systems (NASDAQ:MPWR) delivers impressive Q3, inventory levels improve

Power management chipmaker Monolithic Power Systems (NASDAQ:MPWR) reported Q3 2026 results topping the market’s revenue expectations, with revenue up 63.1% year on year to $1.20 billion. Next quarter’s revenue guidance ($1.35 billion at the midpoint) was unexpectedly strong, at 10.2% above analysts’ consensus estimates. Its non-GAAP profit of $8.19 per share was 5.7% above analysts’ consensus estimates.

For more on Monolithic Power Systems, read our free full research report.

“Overall, we see accelerated growth. Our diversified growth strategy is paying off,” said Michael Hsing, CEO and founder of MPS.

Revenue growth

A company’s long-term performance is an indicator of its overall quality. Any business can experience short-term success, but top-performing ones sustain growth for years. Monolithic Power Systems’s revenue grew at a strong 27.6% compounded annual growth rate over the last five years. Its growth surpassed the average semiconductor company and shows its offerings resonate with customers. Semiconductors are a cyclical industry, and long-term investors should be prepared for periods of high growth followed by periods of revenue contractions (which can sometimes offer opportune times to buy).

Long-term growth matters most, but within semiconductors, a half-decade historical view may miss new demand cycles or industry trends like AI. Monolithic Power Systems’s annualized revenue growth of 35.4% over the last two years is above its five-year trend, suggesting its demand was strong and recently accelerated.

This quarter, Monolithic Power Systems reported strong year-on-year revenue growth of 63.1%, and its $1.20 billion in revenue beat Wall Street’s consensus estimates by 3.4%. Beyond the beat, this marks 11 straight quarters of growth, showing that the current upcycle has been sustained longer than the typical 8–10 quarters. Company management is currently guiding for a 79.7% year-on-year increase in revenue next quarter.

Looking further ahead, sell-side analysts expect revenue to grow 38.8% over the next 12 months, according to S&P, an improvement versus the last two years. This projection is above average for the sector and implies its newer products and services will spur better top-line performance.

Product demand & outstanding inventory

Days Inventory Outstanding (DIO) is an important metric for chipmakers, as it reflects a business’s capital intensity and the cyclical nature of semiconductor supply and demand. In a tight supply environment, inventories tend to be stable, allowing chipmakers to exert pricing power. Steadily increasing DIO can be a warning sign that demand is weak, and if inventories continue to rise, the company may have to downsize production.

This quarter, Monolithic Power Systems’s DIO came in at 130, which is 35 days below its five-year average. At the moment, these numbers show no indication of an excessive inventory buildup.

Key takeaways from Monolithic Power Systems’s Q3 results

Monolithic Power Systems delivered a solid quarter, with operating income topping Wall Street’s consensus estimates and next-quarter revenue guidance coming in well above analysts’ consensus expectations. Shares edged higher 1.4% to $1,215 immediately after the release.

Monolithic Power Systems had a solid quarter, but is this stock a buy? When making that decision, it’s important to consider its valuation and business quality as well as what has happened in the latest quarter. Read the full research report here (it’s free).