Top Analyst Upgrades By: TalkMarkets August 16, 2016 at 11:37 AM EDT Noble Corp. and Patterson-UTI were upgraded to Neutral from Underperform while Marathon Oil and Sasol were upgraded to Buy from Neutral at BofA/Merrill. Read More >> Related Stocks: Chesapeake Energy Forum Energy Technologies Inc Marathon Oil Noble Corp Patterson-Uti Energy Sasol Ltd ADR Sentinelone Inc Cl A Shenandoah Telecom Vipshop Holdings Ltd ADR