** Shares of natural gas companies rise, as natgas futures climbs about 4% to a 13-month high NGA/

** U.S. natgas prices NGc1 up 4.3% at $3.52 per mln British thermal units (mmBtu) on lower output in recent days, an increase in the amount of gas flowing to liquefied natural gas $(LNG)$ export plants to an 11-month high, and early forecasts for more cold weather in January

** LNG firms EQT Corp EQT.N up 1.1%, Sempra SRE.N rises 1.2%; NextDecade NEXT.O and CNX Resources CNX.N both up 1%

** ETFs United States Natural Gas Fund UNG.P rises 3% and ProShares Ultra Bloomberg Natural Gas BOIL.P up 4.7%

(Reporting by Pooja Menon in Bengaluru)

((Pooja.Menon@thomsonreuters.com))