1. Allegro MicroSystems revenue climbs 29% to $276.9 million
Allegro MicroSystems revenue rose 29% to $276.9 million in its fiscal second quarter of 2027, up from $214.3 million a year earlier. The Nasdaq-listed chipmaker said data center sales set a record of about $46 million, more than 150% higher year over year, while automotive sales grew 11% and industrial sales jumped 79%.
The result marks one of the stronger quarters in the company's recent history and comes at a time when demand for components that manage electricity inside AI servers is rising quickly. Allegro, which trades under the ticker ALGM, has positioned itself as a supplier to two of the most important structural trends in the semiconductor industry: the build-out of AI computing infrastructure and the steady electrification of vehicles.
Profitability improved even faster than sales. Adjusted earnings per share doubled, and earnings under standard accounting rules roughly quadrupled. Management also pointed to a run of forward-looking indicators, including record design wins and rising bookings, as evidence that the momentum extends beyond a single reporting period.
2. What does Allegro MicroSystems make?
Allegro MicroSystems designs magnetic sensors and power integrated circuits, the chips that measure, monitor and control the flow of electricity within larger electronic systems. These parts rarely attract the attention given to the processors at the heart of a computer or a car, but they are essential to making those systems run safely and efficiently.
Magnetic sensors detect position, speed and electrical current without direct physical contact, which makes them useful in environments where reliability matters, such as a vehicle's steering system or a motor in an industrial machine. Power integrated circuits handle the conversion and regulation of electricity, ensuring that sensitive components receive exactly the voltage and current they need.
Because nearly every modern electronic system depends on precise control of power, demand for these components tends to track the growth of the broader technology economy. What has changed in recent years is the intensity of that demand in two specific markets, AI data centers and automobiles, where the amount of power being managed has grown sharply.
3. Allegro MicroSystems revenue by end market
Automotive remains Allegro's largest business by a wide margin. Sales to carmakers and their suppliers reached $172.5 million in the quarter, an increase of 11% from the prior year. The company attributed that growth to vehicle electrification and to advanced driver assistance systems, the features that help drivers stay in their lane, brake automatically in an emergency and monitor their surroundings.
The industrial and other category was the standout performer. Sales there reached a record $104.4 million, up 79% from a year earlier. A gain of that size in a segment that is often treated as a secondary contributor suggests that Allegro's growth is not dependent on a single product line or customer group.
Data center sales, while still much smaller than automotive, grew the fastest. The company said revenue from data center customers hit a record of about $46 million, more than two and a half times the level of a year earlier. Allegro tied the increase to the rising power density of AI infrastructure, where servers draw more electricity in tighter physical spaces than conventional computing equipment.
Chief Executive Mike Doogue described the growth as broad-based across the automotive and industrial businesses, with data center demand leading the way. The mix matters for investors: a company whose fastest-growing market is also exposed to one of the largest capital spending cycles in technology may be valued differently from a supplier that depends mainly on car production.
4. Why do AI data centers need power management chips?
AI data centers need specialized power management chips because the servers that train and run AI models consume far more electricity than traditional computing hardware, and they pack that consumption into very small areas. Delivering that power safely and efficiently requires careful conversion, regulation and monitoring at every stage.
Each rack of AI accelerators can draw several times the power of a conventional server rack. That creates two engineering problems. The first is efficiency: any electricity lost during conversion turns into heat, which raises cooling costs and limits how densely equipment can be packed. The second is monitoring: operators need precise, real-time information about current flow to protect expensive hardware and keep systems stable.
Suppliers that make the sensors and power chips solving those problems stand to benefit as power density increases. Allegro's results suggest it is capturing a growing share of that opportunity. Its data center revenue is still modest compared with its automotive business, but the growth rate shows how quickly the market is expanding.
The same dynamic is visible across the broader AI hardware supply chain. As operators race to add computing capacity, attention has gradually widened from the processors themselves to the supporting components, from memory and networking to power delivery, that determine how much useful work a data center can do with a given amount of electricity.
5. Earnings growth outpaces sales
Allegro's profitability improved sharply in the quarter. Adjusted diluted earnings per share, which exclude certain items such as stock-based compensation, came in at $0.26, double the figure from the same quarter a year earlier.
Earnings per share calculated under generally accepted accounting principles were $0.12, roughly four times the prior-year level. The gap between sales growth of 29% and much faster earnings growth reflects operating leverage, the effect that occurs when revenue rises faster than the fixed costs of running the business, allowing a larger share of each additional dollar of sales to reach the bottom line.
For a semiconductor company, operating leverage is especially pronounced because the costs of design teams, manufacturing relationships and research are largely fixed in the short term. When demand picks up, margins can expand quickly, as they appear to have done at Allegro this quarter.
Investors generally pay close attention to whether margin gains of this kind are repeatable. Earnings that rise mainly because of higher volumes on a stable cost base tend to be viewed as more durable than gains driven by one-time items, which is why the relationship between sales growth and earnings growth is often watched as closely as the headline revenue figure.
6. Bookings and design wins point to sustained demand
The quarter extended several winning streaks. Sales grew on a sequential basis for the seventh consecutive quarter, meaning each three-month period has topped the one before it for well over a year. Bookings, the orders customers place for future delivery, rose for the eighth straight quarter.
Design wins rose nearly 40% from a year earlier, reaching the highest quarterly level since the company's initial public offering. A design win occurs when a customer selects a particular chip for a product it is still developing. Because cars, industrial systems and data center equipment often take years to move from design to production, design wins are among the most useful early indicators of a chip supplier's future revenue.
Taken together, the bookings and design win figures suggest that customers are committing to Allegro's components for products that have not yet shipped. Doogue described the company's forward demand signals as having strengthened significantly during the quarter.
These indicators carry particular weight in the semiconductor industry, which has a long history of boom-and-bust cycles. Rising orders and new design commitments do not guarantee future sales, but they provide a measure of visibility that a single strong quarter of revenue cannot.
7. How the automotive business fits the picture
An 11% gain in automotive sales may look modest next to the growth in data center and industrial revenue, but the drivers behind it are structural rather than cyclical. Electric and hybrid vehicles use considerably more power electronics than conventional cars, and each new model tends to include more sensors and power management components than the one it replaces.
Driver assistance features add to that demand. Systems that keep a car in its lane or trigger emergency braking rely on a network of sensors and control units, many of which need precise power regulation and current measurement. As these features move from optional extras to standard equipment, the amount of semiconductor content in each vehicle rises.
That trend toward more chip content per vehicle helps explain how Allegro can grow its automotive business even when overall vehicle production is not expanding rapidly. The pace of electrification continues to vary across regions and manufacturers, which makes the durability of this growth one of the key questions for the company.
8. What comes next for Allegro MicroSystems
For the fiscal third quarter of 2027, Allegro expects net sales of between $278 million and $288 million. The midpoint of that range would represent growth of about 23% from a year earlier, a slight deceleration from the second quarter's 29% but still a strong pace.
Management attributed the outlook to continued demand for power management in AI systems and for automotive safety applications. Investors will be watching several things over the coming quarters: whether data center revenue keeps compounding at a rapid rate, whether the automotive business holds up as electrification trends evolve, and whether results land inside the guided range.
The company's ability to sustain its margin expansion will also be in focus. Doubling adjusted earnings on 29% sales growth is a strong outcome, and maintaining that kind of operating leverage as the business scales will be an important test of the current momentum.
For now, Allegro's latest quarter offers a clear example of how the AI build-out is spreading benefits beyond the best-known chip designers to the suppliers of the less visible components that keep data centers running.