Allegro MicroSystems through the years: building magnetic sensing and power semiconductors
Allegro MicroSystems traces its semiconductor and sensing roots to operations in Worcester, Massachusetts, where company history points back to Sprague Electric activity established in 1965.
How Allegro MicroSystems developed
The business developed expertise in magnetic sensing and power integrated circuits, technologies used to measure position, speed and current in automotive and industrial systems. Allegro later emerged as a separately traded public company in 2020.
Allegro MicroSystems in 2026
By 2026, Allegro supplied magnetic sensor ICs and power-management semiconductors to automotive, industrial and clean-energy markets.
The company’s long technical lineage matters because modern electric vehicles and automated machinery depend heavily on accurate sensing and power control even though those chips are less visible than processors or memory.
Information was checked against public company material, regulatory filings and reputable independent reporting where available, using sources accessible on 18 September 2026.
