** Shares of natural gas companies down as natgas futures ease about 1% to one-week low

** U.S. natgas prices down 2.6% at $3.13 per mln British thermal units (mmBtu) on rising output and forecasts for mild weather and low-heating demand through start of new year

** LNG firms - NextDecade down 1.3%, CNX Resources

falls 2.4%, EQT Corp down 1.6% and Williams Companies falls 1%

** ETFs - United States Natural Gas Fund down 3.1% and ProShares Ultra Bloomberg Natural Gas falls 5%

(Reporting by Pooja Menon in Bengaluru)

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