The below memo discusses the Second Circuit’s April 27, 2010 decision in Pacific Investment Management Co. LLC (“PIMCO”) v. Mayer Brown LLP, which held that a secondary actor can be held liable in a private damages action under Section 10(b) of the Exchange Act only for false statements “attributed” to the secondary-actor defendant at the time of dissemination. In so holding, the Court of Appeals clarified its inconsistent prior precedents, and rejected a more relaxed standard for secondary actor liability advanced both by the plaintiffs and the SEC as an amicus.