Court of Appeals
On February 6, 2007, a three-judge panel of the Ninth Circuit affirmed the district court's class certification. Judge Harry Pregerson wrote for the majority, which also included Judge Michael Daly Hawkins. Judge Andrew J. Kleinfeld dissented and criticized the majority's view of the class certification standards.[6]
Walmart promptly filed for a rehearing and a rehearing en banc, contending that the majority committed legal error with regard to whether the grounds for class action certification had been met.
On December 11, 2007, the same Ninth Circuit panel withdrew its initial opinion and issued a subsequent, superseding opinion, which still permitted class certification.[7] The panel dismissed the original petition for rehearing as moot in light of its superseding opinion, on the grounds that the revised opinion addressed the legal errors claimed in the petition, but Walmart was permitted to refile its petition. Among other changes to its original opinion, the Ninth Circuit altered its opinion with respect to the admissibility of expert testimony and the use of Daubert challenges during a motion for class certification. Walmart filed another petition for a rehearing en banc.
On February 13, 2009, the Ninth Circuit granted Walmart's petition for rehearing en banc on the class action certification.[8] As a result, the December 2007 Ninth Circuit opinion was no longer effective.[9]
On March 24, 2009, an en banc panel of eleven Ninth Circuit judges, led by Chief Judge Alex Kozinski, heard oral argument.[10] On April 26, 2010, the en banc court affirmed the district court's class certification on a 6-5 vote, with Judge Michael Daly Hawkins writing the majority opinion and Judge Sandra Segal Ikuta writing the dissenting opinion.[11]
Walmart's lead appellate counsel, Theodore Boutrous Jr., said in a statement that the decision violates "both due process and federal class action rules, contradicting numerous decisions of other federal appellate courts and the Supreme Court itself" and indicated that Walmart would appeal to the Supreme Court.[12] Plaintiffs' counsel argued that "Wal-Mart is attempting to dismantle the Supreme Court's employment discrimination class action jurisprudence [that] would require the Court to overrule 45 years of civil rights and class action precedent."[13]