** Shares of liquefied natural gas producer NextDecade NEXT.O up 3.1% at $10.40 premarket

** Company late on Monday said ConocoPhillips COP.N will purchase 1 million tonnes per annum of LNG from NEXT's Rio Grande export facility in Texas for 20 years

** The deal brings NextDecade closer to making a positive final investment decision on Train 5, which is now expected in the fourth quarter

** Separately, TotalEnergies TTEF.PA CEO Patrick Pouyanne said in an interview with CNBC that NEXT would announce an FID on an additional liquefaction unit at its Rio Grande LNG project

** TTEF owns a 10% stake in the fourth liquefaction plant (Train 4) at NEXT's facility in Texas

** As of last close, NEXT shares up 30.9% YTD

(Reporting by Sumit Saha in Bengaluru)

((Sumit.Saha@thomsonreuters.com;))