Natgas companies' shares down on surprise storage build, lower demand forecasts

** Shares of U.S. natural gas companies fall, tracking a decline in natgas futures

** U.S. natgas futures Natgas companies' shares down on surprise storage build, lower demand forecasts NG1! down ~5% at $4.04 per million British thermal units. On Wednesday, the contract closed at its highest since March 11

** Natural gas prices dropped on a surprise storage build and forecasts for milder weather and less demand next week than previously expected

** The U.S. Energy Information Administration says utilities added 9 billion cubic feet of gas out of storage during the week ended March 14, surpassing forecasts of 3 bcf

** Shares of natgas companies NextDecade Natgas companies' shares down on surprise storage build, lower demand forecasts NEXT down 3.5% and Sempra Natgas companies' shares down on surprise storage build, lower demand forecasts SRE down ~1%

** CNX Resources Natgas companies' shares down on surprise storage build, lower demand forecasts CNX and Energy Transfer Natgas companies' shares down on surprise storage build, lower demand forecasts ET both down marginally

** ETFs United States Natural Gas Fund Natgas companies' shares down on surprise storage build, lower demand forecasts UNG and ProShares Ultra Bloomberg Natural Gas Natgas companies' shares down on surprise storage build, lower demand forecasts BOIL fall 4.1% and 8.1%, respectively

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