Shareholders are among the many who have lost money in the multi-billion euro insolvency of the former DAX30 payment provider Wirecard and its allegedly fraudulent business practices. Wirecard had to file for insolvency after assets worth 1.9bn could not be found.
If a publicly traded company is acquired by a private company, its share prices will typically rise to the takeover price. When the deal is closed, existing shareholders will receive cash in return for their stock (i.e., their shares will be sold to the acquiring company).