** U.S.-listed shares of oil companies gain premarket, tracking rising oil prices O/R

** Brent crude futures LCOc1 up 0.9% at $67.72/barrel and U.S. West Texas Intermediate crude futures CLc1 up 0.9% at $66.09/barrel

** Oil prices edge up as Iran suspended cooperation with the U.N. nuclear watchdog and markets weighed expectations of increased supply from major producers next month, while the U.S. dollar softened further

** Top oil and gas companies Exxon Mobil XOM.N and Chevron CVX.N each rise marginally

** APA Corp APA.O up 1%, EQT Corp EQT.N rises 1.2% and Occidental Petroleum OXY.N up 1%

** Shares of oilfield services companies Halliburton HAL.N and SLB SLB.N rise 1.1% and ~1%, respectively

** Refiner Phillips 66 PSX.N up marginally

(Reporting by Pooja Menon in Bengaluru)

((Pooja.Menon@thomsonreuters.com;))