23andMe, the company whose mail-in self-testing kits became synonymous with DNA testing, is filing for bankruptcy . Anne Wojcicki, who co-founded 23andMe in 2006, is stepping down as CEO as the company tries to find a buyer amid slowing sales four years after going public.

23andMe Holding Co.’s stock tumbled 47% Monday, after the DNA-testing company filed for Chapter 11 bankruptcy, just months after admitting there was substantial doubt about its ability to continue as a going concern.