Shareholders who acquired shares post-bankruptcy-confirmation are transferees who step into the shoes of the previous owners, and their post-confirmation claims based on FINRA and tort are therefore barred by the bankruptcy's release of claims.
http://www2.ca3.uscourts.gov/opinarch/172522p.pdf
Since 2011. An occasional commonplacing of the U.S. Circuit Courts of Appeal.
Neither an authoritative statement of the law nor legal advice. Quick work.