Allegro MicroSystems reported net sales of $276.9 million for its fiscal second quarter ended 25 September 2026, up 29% from a year earlier, in results released on 29 October. Chief executive Mike Doogue said growth in its automotive and industrial markets was “led by data center, which established a new record”.
Allegro’s Industrial and Other sales rose 79% to $104.4 million, while Automotive rose 11% to $172.5 million. By our arithmetic, Industrial and Other supplied $45.9 million of the $62.6 million increase in total sales, about 73%, and rose to 37.7% of sales from 27.3% a year earlier.
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The key insight: By our arithmetic, Allegro’s Industrial and Other line supplied about 73% of its $62.6 million year-on-year sales increase, while Automotive, still the larger line at $172.5 million, supplied the rest.
The release, filed with the SEC as Exhibit 99.1, gives net sales of $276,884 thousand against $214,294 thousand in the same quarter of fiscal 2026. Non-GAAP gross margin was 51.5% and non-GAAP operating margin 20.6%. Non-GAAP diluted earnings per share were $0.26, against $0.13 a year earlier.
Its headline calls the quarter one of “Record Industrial & Other and Data Center Sales”. The release does not give a separate data center sales figure in the tables we read.
Allegro MicroSystems net sales by end market in the September 2025, June 2026 and September 2026 quarters, US$ million, as reported. Industrial and Other was 37.7% of sales against 27.3% a year earlier; the shares are our arithmetic. Source: Allegro MicroSystems Q2 fiscal 2027 results (Exhibit 99.1, 29 Oct 2026).
Key Updates: ๐น Debt Repayment: $25M voluntary repayment following quarter-end
Comments: ๐ธ โOur forward demand signals strengthened significantly this quarter. We delivered our highest quarterly design-win performance since our 2020 IPOโup nearly 40% year-over-yearโand bookings increased for the eighth consecutive quarter.โ
๐ธ โWith record design wins, a robust backlog, and expanding content across our target Automotive and Industrial markets, the leading indicators across our business give us high confidence in our path to exceed our target model of mid-teens annual sales growth.โ
A post by @wallstengine summarising Allegro MicroSystems’ fiscal second-quarter 2027 results, including revenue of $277M, up 29% year on year, and Industrial & Other revenue of $104.4M, up 79%.
The Demand Signals
Doogue said: “We delivered our highest quarterly design-win performance since our 2020 IPOโup nearly 40% year-over-yearโand bookings increased for the eighth consecutive quarter”. He said the leading indicators give Allegro “high confidence in our path to exceed our target model of mid-teens annual sales growth”.
For the third quarter of fiscal 2027, ending 25 December 2026, Allegro expects net sales of $278 million to $288 million, which it says implies 23% growth at the midpoint.
Cash and Debt
Non-GAAP free cash flow was $30.5 million, or 11.0% of net sales, according to the release’s reconciliation table. Chief financial officer Derek D’Antilio said that on 30 September, after the quarter closed, Allegro made “another $25 million voluntary debt repayment”.
Allegro describes itself in the release as using magnetic sensing and power chips to propel “electrification, automation, AI data center, and robotics”.
The Structural Read
As we read the release, the chief executive ties the quarter to data center, but the tables report only two end markets, Automotive and Industrial and Other, so the record is described rather than sized.
By our arithmetic, Industrial and Other grew 11.2% from the June quarter to the September quarter, from $93.9 million to $104.4 million, while Automotive grew 4.3%.
As we read the outlook, the $278 million to $288 million range for the December quarter sits above the $276.9 million just reported; Allegro says the midpoint implies 23% growth on a year earlier.
Mike Doogue, President and CEO of Allegro, in the release of 29 October 2026
“Our forward demand signals strengthened significantly this quarter”
Three Implications
FOR THE DATA CENTER SUPPLY CHAIN Allegro describes its business as magnetic sensing and power chips used in electrification, automation, AI data center and robotics; the release does not name the data center customers.
FOR THE BALANCE SHEET The release gives non-GAAP free cash flow of $30.5 million for the quarter, and the chief financial officer said Allegro made another $25 million voluntary debt repayment on 30 September.
FOR THE NEXT QUARTER Allegro guides non-GAAP gross margin of 51.5% to 52.5% for the December quarter, against 51.5% in the quarter just reported.
The framework argues: “The structural bottleneck isn’t computing, it’s electrons.”
As we read it, a sensor and power-chip maker reporting a data center record is one place that argument shows up in a filing: the parts that measure and manage power inside the racks. The framework does not discuss Allegro.
The release does not break out data center sales in the tables we read, so the size of the record Doogue described is not given. It also does not say which customers or products drove the Industrial and Other increase. We did not read or listen to the earnings call. The 73% share of growth and the end-market shares are our arithmetic from the release’s segment table.
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Allegro’s sales rose 29% to $276.9 million, and its chief executive said the growth was led by a record in data center. By our arithmetic, Industrial and Other, up 79%, supplied about 73% of the increase and is now 37.7% of sales; the release gives no data center sales figure.
A note on sourcing. All figures and quotations come from Allegro MicroSystems’ second-quarter fiscal 2027 earnings release (Exhibit 99.1 to its 8-K of 29 October 2026). We did not read or listen to the earnings call. Shares of sales and the share of growth are our arithmetic.
Gennaro Cuofano is a CRO and tech executive who has worked in AI since late 2015, starting with bringing NLP, natural-language generation, voice and chatbot products to the marketing industry. His background is in law and finance: he holds a Master's degree in Law and an International MBA with an emphasis on corporate finance (LUISS Business School and the University of San Diego, 2012), and worked as a financial analyst at a real-estate investment firm in San Diego and as an assistant controller. His work focuses on business model strategy, business engineering and, more broadly, structural analysis: how companies make money, read from their own filings. He created FourWeekMBA and leads research there and at The Business Engineer, his newsletter on AI and business strategy, with over 95,000 subscribers and more than 1,000 published analyses. His writing has also appeared on Entrepreneur (for example, How to Digitize a Family Business in Europe) and HackerNoon. Find him on LinkedIn and Substack. See how we source.
