Employers took 1,599 mass layoff actions in May involving 143,540 workers, seasonally adjusted, as measured by new filings for unemployment insurance benefits during the month, the U.S. Bureau of Labor Statistics reported. Each mass layoff involved at least 50 workers from a single employer. The number of mass layoff events in May increased by 35, or 2 percent, from April, while the number of associated initial claims decreased by 387, or less than 1 percent. In May, 373 mass layoff events were reported in the manufacturing sector, seasonally adjusted, resulting in 38,673 initial claims; both figures increased over the month.