Nature of the Business and Basis of Presentation |
12 Months Ended |
|---|---|
Mar. 27, 2026 | |
| Organization, Consolidation and Presentation of Financial Statements [Abstract] | |
| Nature of the Business and Basis of Presentation | 1. Nature of the Business and Basis of Presentation Allegro MicroSystems, Inc., together with its consolidated subsidiaries (the “Company”), is a global leader in the design, development, and marketing of sensor integrated circuits (“ICs”) and application-specific power ICs, that enable the sensing, motion control, and power management functions of complex electromechanical or power conversion systems. The Company primarily serves automotive and industrial markets, where its solutions enable customers to sense, move, and manage power with efficiency, precision, and reliability. The Company is incorporated under the laws of Delaware. The Company is headquartered in Manchester, New Hampshire and has a global footprint, with 27 locations across four continents. The Company prepares its financial statements in accordance with accounting principles generally accepted in the United States (“GAAP”). Financial Periods The Company’s fiscal year is the 52-week or 53-week period ending on the last Friday in March. The Company’s 2026 fiscal year ended March 27, 2026 (“fiscal year 2026”), the 2025 fiscal year ended March 28, 2025 (“fiscal year 2025”), and 2024 fiscal year ended March 29, 2024 (“fiscal year 2024”) were each 52-week periods. |