Argument Transcripts in Costco and Concepcion By Barry Barnett on November 9, 2010 The Supreme Court has posted the oral argument transcripts in the two business cases we wrote about a few days ago (post here): Costco Wholesale Corp. v. Omega, S.A., No. 08-1423 (U.S.) AT&T Mobility LLC v. Concepcion, No. 09-893 (U.S.)