Southwest Airlines Co. added six new board directors in a pact with Elliott Investment Management, as the carrier seeks to address the activist's push for changes and salvage the job of its chief executive officer. New board members include former Chevron Corp. CFO Pierre Breber, former Virgin America CEO David Cush, ex-federal railroad administrator Sarah Feinberg, former Marriott International Group President Dave Grissen, ex-WestJet CEO Gregg Saretsky and NCR Atleos Chief Information, Technology Officer Patricia Watson, who all join Nov. 1.