Me 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.

Me filed for bankruptcy on Sunday, hit by faltering demand for its ancestry testing kits as it struggled to contain the reputational damage from a widespread data breach.

Struggling genetic testing company 23andMe has filed for bankruptcy and its co-founder and CEO has resigned, leaving its millions of ancestry testing kit customers with questions about what happens to their data.