The largest single corporate layoff in U.S. history was IBM's reduction of its workforce by 60,000 employees in 1993.
However, the ongoing mass federal layoffs under the second Trump administration, potentially exceeding 200,000 workers and possibly reaching 300,000, could surpass this corporate record if completed. More to come in 4th Quarter 2025
Other major layoffs include Citigroup's 50,000 job cuts in 2008 and Sears' 50,000 job cuts in 1993.