A federal district court judge denied a motion to amend a securities fraud class action against a quantum computing company, ruling the amendment would be futile due to failure to adequately plead claims. Separately, GameStop CEO Ryan Cohen lost a bid to dismiss a lawsuit accusing him of profiting $47 million from the sale of his stake in Bed Bath & Beyond. In another case, a U.S. judge rejected short seller Andrew Left's motion to dismiss a Securities and Exchange Commission (SEC) lawsuit alleging he and his firm, Citron Research, engaged in a $20 million multi-year scheme to defraud followers by publishing false and misleading statements about stock recommendations. The SEC's case against Left includes accusations of fraud through stock trades, social media posts, and research reports.