Monolithic Power's $1 Billion Quarter Is Not the Problem — the Multiple Is

Revenue crossed $1B for the first time and management raised its data-center floor again, but MPWR's tape has already de-rated 29% from its June peak.

MPWR · Earnings Call · 2026-10-29

A Billion-Dollar Quarter, Priced Like a Doubt

Monolithic Power Systems crossed a threshold on Oct. 29 that few analog chip companies ever reach. “In Q3, MPS achieved another significant milestone, exceeding $1 billion in quarterly revenue for the first time.” — Tony Balow, Vice President · 2026-10-29 Revenue was $1.2 billion, up 22% sequentially and 63% year over year. The company's accelerated growth language is backed by hard numbers, not just narrative: the enterprise data end market was strong, communications was positioned as the second-fastest end market for the year, and automotive finally began the second-half ramp management had promised. Yet the stock sits 29.1% below its June 3 peak and is down 16.5% over the last 90 trading days. That gap — record operating momentum versus a de-rating tape — is the real story of this report. The quarter itself was not a one-off. Q2 revenue of $981M was up 54% year over year, and the Q3 print followed with a further step-up. Operating margin was 32.8% in the last reported quarter, and management described opex as falling below its model because the top line is growing too fast to spend the money. “you are going to fall below the model from an opex perspective.” — Tony Balow, Vice President · 2026-10-29 That is a high-class problem — and one investors have heard before.

The Fourth Floor Raise in Four Calls

The headline guidance change was the enterprise data floor: from 130% year-over-year to 150%. “we are comfortable with a floor of 150% year-over-year now going forward.” — Tony Balow, Vice President · 2026-10-29 It sounds explosive, and it is. But it is also the fourth consecutive quarter in which management has raised this same floor. In February the floor was 50%; by April it was 85%; by July it was 130%. “we are willing to raise floor for that particular end market from 85% for the year to 130% for the year.” — Tony Balow, Chief Financial Officer · 2026-07-30 The ritual tells you demand visibility is improving. It also tells you the company is chasing a fast-moving number rather than guiding to a stable long-term model. The more informative disclosure was capacity. MPS said it has surpassed $6 billion of annual revenue support, expects $8 billion in place by the second half of 2027, and is on a path to $10 billion. That is a physical commitment, not a sentiment survey.

Right now, I think what we are trying to strongly signal is that just like we have been doing it the past 20 years, we are making sure that capacity stays ahead of the business. In a world where there is a lot of narrative around there being tightness, we wanted to be very clear to you and our customers how we are growing capacity to support that business.
Tony Balow, Vice President · 2026-10-29

Because MPS is fabless, this does not require a capex hole. But it does require working capital, supplier qualification, and module assembly — the part of the model that management says is harder than silicon.

What the Call Wouldn't Quantify

The most important non-answer was 2027. Analysts tried repeatedly to get a growth rate or a revenue framework for next year; management declined, saying it was too early. Instead, Michael Hsing returned to design activity and customer diversity, arguing that the company does not need to predict end markets if it wins sockets. That is consistent with the diversified growth strategy he has preached for years, and it is supported by the driver of growth language around modules, new customers, and platform refreshes. But the call also pushed the most anticipated technology further out. On 800V data center architectures, MPS is now sampling GaN-based solutions to complement its silicon carbide designs. The revenue timing, however, remains late 2027 and 2028. “It is probably end of 2027 and 2028.” — Michael R. Hsing, Chairman of the Board · 2026-10-29 That is not a 2026 catalyst. It is also a reversal of tone from prior calls, when Michael was openly skeptical of GaN. “I do not believe GaN. And now I think I was proven wrong. But it is up to a point where we cannot ignore GaN.” — Michael R. Hsing, Chief Executive Officer · 2026-07-30 The technology is real; the revenue is not imminent. The same pattern applies to high speed memory products and the first large data converter design win. Both are genuine SAM expanders, and both are slated to ramp in 2027 or later. The AI data center wave is clearly lifting the entire supply chain — global tape data shows AI data center as a broad advancer — but MPS is selling picks and shovels, not the compute itself. optical modules and the switch business are the clearest near-term beneficiaries, and management says communications should be the second-fastest end market this year. That is a powerful story, but it is already in the numbers.

The Multiple Is the Message

The stock's drawdown is not a verdict on the quarter. It is a verdict on the price. Even after falling from its June peak, MPS trades at 21.3x trailing revenue, 71.4x operating income, and 88.9x net income. Those multiples can be justified only if the company sustains hypergrowth and expands margins. Yet gross margin is still 55.2%, at the low end of the 55–60% model, and free cash flow less stock-based compensation was just $92 million in the latest reported quarter. R&D was $119 million on $981 million of Q2 revenue, roughly 12%. The business is high-quality, but the valuation leaves little room for a 2027 guide that fails to quantify the ramp. Management's $450 million of Q3 share repurchases signal confidence. They also signal that the company sees its own stock as undervalued after the de-rating. That may prove right. But buybacks do not change the fundamental debate: can MPS convert AI demand into revenue without sacrificing the 55–60% gross margin model, and can it grow into a multiple that already assumes years of perfection? The next catalyst is the Q4 guide and, more importantly, the first credible 2027 framework. If the floor raises keep coming and the 800V/auto/robotics ramps arrive on schedule, the current drawdown could look like an opportunity. If 2027 remains unquantified and gross margin stays pinned at the low end, the multiple may keep doing the talking. The demand is not the question. The price of that demand is.