Allegro's Record Quarter Meets a 40% Drawdown

Allegro's Record Quarter Meets a 40% Drawdown

On paper, Allegro MicroSystems just delivered the kind of quarter that should have been rewarded. Fiscal Q2 2027 sales were $277 million, up 29% year over year and above the high end of guidance; non-GAAP EPS doubled to $0.26; gross margin reached 51.5%; and the company posted a seventh consecutive quarter of sequential growth. Guidance for the December quarter calls for $278 million to $288 million, up 23% at the midpoint, with EPS implying an 80% year-over-year increase. Yet the stock is down 40.4% over the last 90 trading days and 52.6% from its June peak. That gap — between operating momentum and market price — is the story.

The operating beat was real — and broad

This was not a one-line beat. CEO Mike Doogue said Allegro delivered “our highest quarterly design win performance since our 2020 IPO, with total design wins increasing nearly 40% year-over-year” — Mike Doogue, President and Chief Executive Officer · 2026-10-29. Bookings rose 45% year over year, the eighth consecutive quarterly increase, and backlog expanded across automotive and industrial. Auto sales grew 11% year over year, industrial and other sales jumped 79% to $104 million, and the data center business hit a record $46 million, up more than 150% year over year. Doogue also flagged that current-sensor design wins for data center applications more than doubled sequentially, including more than 10 wins with top Taiwanese power-supply providers for hyperscaler PSUs, BBUs and UPS systems.

The magnetic sensor franchise is at the center of this. Allegro is arguing that higher rack power densities make legacy resistive shunts and bulky transformers less attractive, pulling its high-precision current sensors into power supplies. Management repeated its dollar content story: $150 of content per traditional rack growing to more than $425 in AI-forward racks, with isolated gate drivers potentially adding hundreds of dollars more later. That is a credible content-expansion narrative, not just a market-growth story.

The air pocket: data center timing broke the spell

The problem is that the data-center revenue line did not behave like a straight line this quarter. After a June quarter in which data center grew more than 30% sequentially, September growth slowed to roughly 4%. Doogue did not hide it. He attributed the pause to program timing:

Those big programs were pushed out by a quarter or two... the push out seemed to be related to the delay of some 800 volt programs with the hyperscalers.

That is the first explicit timing excuse after several quarters in which management insisted there was no timing issue at all. In July, CFO Derek D'Antilio was asked why data center growth was decelerating and answered: “No, it's not really timing. It's really just the law of large numbers.” — Derek D’Antilio, Executive Vice President · 2026-07-30 Six months earlier, the same point was framed as math, not program slippage. The shift matters because it turns a smooth compounding story into a lumpy one. Investors can underwrite a law-of-large-numbers deceleration; they have a harder time underwriting a hyperscaler-driven air pocket when the stock already trades at a premium.

The company insists the pause is temporary. Doogue said the big programs are "on the come" and that data center remains on track to more than double in fiscal 2027. But the market heard the word "push out" and sold first. The global AI data center tape has also been weak over the last 90 days, with high-performance-compute names among the decliners, so Allegro is catching a sector de-rating on top of its own timing wobble.

New, recurring, and what the tape is saying

The genuinely new pieces are in robotics and energy infrastructure. Allegro secured a win with a leading Chinese humanoid supplier that uses roughly 60 ICs per robot and ramps within six months. Doogue called it validation: “60 ICs in a single robot in a single win” — Mike Doogue, President and Chief Executive Officer · 2026-10-29 proves the theoretical $150 content opportunity is real. In fiscal Q3, Allegro will begin sampling what it calls the industry's first fully integrated magnetic sensor and motor driver IC designed specifically for humanoid hands and fingers. It also landed its first major silicon-carbide high-voltage gate driver win with a leading solar provider, a small but strategic beachhead in energy infrastructure.

What is not new: thin automotive inventories and no restocking. In May, Doogue said “We've seen no clear signs of restocking” — Michael Doogue, President and Chief Executive Officer · 2026-05-07; on this call he said customers are only talking about strategic inventory, with little activity yet. What is also not new is the long ramp for isolated gate drivers. In May, management said that business was "still 18 to 24 months out" from material data-center revenue. This quarter Doogue said Allegro might beat that timeline, but the revenue is still ahead of the company, not in it.

Fundamentally, the last filed quarter understates the current run rate. The last filed quarter showed $259 million in revenue, up 27% year over year, and the September quarter just reported $277 million. Gross margin was 48.5% in the last filed quarter and 51.5% in the September quarter. Operating income was $25 million in the last filed quarter, up 355% year over year. The operating trajectory is clearly improving; the stock is not disputing the past, it is discounting the next two quarters.

What to watch

The bull case rests on data-center reacceleration in the December quarter, the 800-volt programs shipping rather than slipping again, and gross margin continuing toward the >55% target as pricing actions layer in. The bear case is that the data-center pause extends, capacity constraints at the back-end test limit upside, and the humanoid optionality — still only 3% to 4% of sales in factory automation and robotics for fiscal 2027 — remains too small to matter near term. For now, Allegro has a record order book and a broken stock. That is a classic setup only if the timing issue is truly one quarter.