I think Dave W would be lead plaintiff in such a class action suit. Funny, most shareholder lawsuits are against company mgt., not a major shareholder, but to answer your question, yes, anyone can file a civil suit, but it seems that the company's covered that topic in the cross complaint.
I do not know if the damages of having lost money in selling the stock at a loss can be separately pinned on the same perpetrator for the same criminal actions. You would need a competent attorney, but there have been a lot of those around lately. Would like to hear more from you as your questions are answered.
Market Data 
Markets 
AI
