KKR lawsuit is specifically seeking recovery for preferred shareholders who bought shares during the preferred shares IPO at $1000 a share. Not for those who bought preferreds afterwards or common shareholders. The other class actions are all stayed until the end of bankruptcy. The main common shareholder class action, https://www.blbglaw.com/cases/00283, was for shareholders of record before April 5, 2016. There's no need to hold shares from April 5, 2016 onwards to be represented in the class.