UGI Energy Services, LLC is the marketing, midstream and power generation subsidiary of UGI Corporation. In 1985, UGI Corporation established the tradename, GASMARK, as one of the first marketers to sell natural gas to business users in the deregulated marketplace. In 1995, UGI Energy Services was formed as a separate company to pursue the opportunities created by federal and state deregulation of electricity and natural gas commodity supply markets, direct access and customer choice. UGI Energy Services is now an integrated energy marketing and asset-based company operating throughout the Northeast and Mid-Atlantic regions. UGI Energy Services markets natural gas, electricity and liquid fuels, now under the trade name UGI EnergyLink, to approximately 43,000 commercial, industrial, institutional, government, and residential customers in nine states as well as the District of Columbia. Additionally, UGI Energy Services buys and sells energy commodities at the wholesale level and owns and operates a variety of electric generation assets in Pennsylvania as well as a variety of midstream natural gas assets that support the storage, transportation and delivery of natural gas.