Allegro MicroSystems, Inc. (ALGM) | The Buildout — AI Infrastructure

The Verdict

Allegro MicroSystems designs the sensor and power chips that go inside cars, factories and data-center racks. In AI infrastructure its parts handle cooling and power delivery rather than compute: three-phase fan drivers that keep servers cool, current sensors that measure current in the power-supply stages, and, later, isolated gate drivers for high-voltage power conversion. The franchise is magnetic sensing, where the company describes itself as the world's leading supplier by market share, and its content per rack scales with how much power each rack draws. That makes it an indirect play: the demand comes from the build-out, but it sells components, not systems.

Earnings Beat

Allegro's latest reported quarter, ended June 26, 2026, produced revenue of $259.2M, up 6.6% sequentially and about 27% above the $203.4M reported a year earlier. Gross margin was 48.5%, against 44.9% a year ago. Net income was $15.9M and free cash flow $14.4M. The company's own commentary on that quarter is not in the source material.

Management tone: The most recent call in the source material — FY2026 Q4, on 2026-05-07 — showed confident, numerically specific management. Data-center growth language firmed to well above 20% for FY2027, the backlog description was upgraded from multi-quarter highs to a multiyear high, and the pricing posture shifted from very low single-digit reductions to select increases beginning at the end of Q1 FY2027. Management stayed cautious on automotive, saying inventories remain thin with no clear signs of broad restocking, and it conceded that GPU and TPU fans will move to liquid cooling while arguing the power-supply fan offset more than covers the loss. It disclosed pockets of order delinquency and reaffirmed, rather than pulled in, the 18-to-24-month isolated-gate-driver timeline, and it declined to commit to a quarterly data-center revenue breakout. No call detail for the quarter ended June 26, 2026 is in the source material.

Management Guidance

For Q1 FY2027, management guided net sales of $245M–$255M (midpoint about +23% YoY and about +3% sequentially), non-GAAP gross margin of 50%–51%, and non-GAAP operating expenses of $80M ± $2M. The call added a diluted share count of 187M and an embedded drop-through of about 70% versus a typical 60–65%. Management said auto and focus auto would each be up a couple of percentage points sequentially and that data center would be 16–17% of sales, implying 20–25% sequential growth. Longer-term framing on the same call: data-center growth well above 20% in FY2027 and north of 20% long term, focus auto growth similar to FY2026, a long-term gross-margin target above 55%, and select price increases beginning at the end of Q1 FY2027.

Trajectory

Revenue rose sequentially in each of the last four quarters, from $214.3M to $259.2M, with increases of 5.4%, 7.0%, 6.1% and 6.6%. Gross margin moved from 46.3% to 48.5% over the same span and EBITDA margin from 10.7% to 16.3%. The driver is mix: in the March 2026 quarter, industrial and other revenue grew 23% sequentially while automotive was flat, and data center within industrial grew 41% sequentially to a record share. Management attributes the leverage to 60–65% drop-through on incremental revenue — guided at about 70% for Q1 FY2027 — plus factory efficiencies that offset an approximately 200 basis point gold headwind in FY2026.

The Model

The model projects FY+1 revenue of $1,120M with EBITDA of $211M (18.8% margin), and FY+2 revenue of $1,350M with EBITDA of $290M (21.5% margin). The near term is anchored on the Q1 FY2027 guide of $245M–$255M in sales and a 50%–51% gross-margin range, with data center guided to 16–17% of sales and about 70% drop-through on incremental revenue. FY+2 depends on the data-center business compounding at management's stated well-above-20% FY2027 rate, current sensors continuing to scale inside that mix, and gross margin progressing toward the company's long-term target of above 55%.

Projections are the median of 5 independent model runs. The model’s revenue sits 4.8% above analyst consensus.

For Q1 FY2027, management guided net sales of $245M–$255M (midpoint about +23% YoY and about +3% sequentially), non-GAAP gross margin of 50%–51%, and non-GAAP operating expenses of $80M ± $2M. The call added a diluted share count of 187M and an embedded drop-through of about 70% versus a typical 60–65%. Management said auto and focus auto would each be up a couple of percentage points sequentially and that data center would be 16–17% of sales, implying 20–25% sequential growth. Longer-term framing on the same call: data-center growth well above 20% in FY2027 and north of 20% long term, focus auto growth similar to FY2026, a long-term gross-margin target above 55%, and select price increases beginning at the end of Q1 FY2027.

What Could Go Right — and Wrong

Looking Ahead

Over the next 12 months the questions are how fast the data-center mix rises, whether the price increases land, and whether robotics ships. Management guided Q1 FY2027 sales to $245M–$255M with data center at 16–17% of sales, expects data-center growth well above 20% for FY2027, and expects focus auto to grow something similar to FY2026's 30%. Robotics design wins are slated for initial shipments in calendar 2026, with volumes increasing in 2027. The isolated-gate-driver leg stays 18 to 24 months out, so the near term rests on products already shipping.

Financials

Annual Summary

Key Ratios (Trailing)

The Company

Allegro designs and sells sensor ICs and application-specific power ICs — magnetic sensors for current, position and speed, and power ICs for motor driving, regulation and isolated gate driving. The chips enable sensing, motion control and power management, and the company sells mostly into automotive and industrial markets, including AI data centers, robotics and energy infrastructure. It ships about 2.1 billion units a year to more than 15,000 customers, and it describes itself as the world's leading supplier of magnetic sensor ICs by market share.

Allegro owns the back end and rents the front end. Assembly and testing run primarily through its Manila, Philippines site — about 440,000 square feet, owned — alongside a leased R&D and administrative office in Muntinlupa City and its Manchester, New Hampshire headquarters of about 125,000 square feet. Wafers come from four named third-party foundries: UMC, Polar Semiconductor, Tower Semiconductor and TSMC, two of which are in Taiwan. Sales run heavily through distribution — all of Japan, a little more than half of China and 90% of industrial sales including data center — and the largest non-affiliated distributor accounted for 9.4% of FY2026 net sales, with no end customer above 10%.

Business Segments

Competitive Landscape

The 10-K does not name competitors, and the competitive picture in the source material comes from a lower-confidence relationship map. Allegro's own claim is narrow: it describes itself as the world's leading supplier of magnetic sensor ICs by market share, and says its magnetic current sensors lead in output accuracy, bandwidth and power density. The clearest disclosed competitive datum is a robotics design win in which its current sensors were selected over local alternatives on performance and smaller package size. Management also addressed a substitution threat directly, conceding that GPU and TPU fans will move to liquid cooling while arguing that fan proliferation into power supplies and network switching more than offsets the loss.

Supply Chain

Allegro buys wafers from four named foundries, owns assembly and test in the Philippines, and reaches customers mostly through distribution. No supply-chain neighbor in the source material names Allegro by name, so the corroboration is indirect.