1. Automated health software start-up Olive, based in Columbus, Ohio, laid off 450 employees, nearly 35 percent of the company, on July 19.
2. Dallas, Texas-based Signify Health laid off 489 employees on Aug. 12.
3. Texas-based Beaumont-Spectrum, formed earlier this year from a merger, laid off 400 corporate employees on Sept. 9.
4. Pharmaceutical company AbbVie laid off 99 employees in September.
5. Pharmaceutical company Bristol Myers Squibb laid off 261 workers in September.
