Constellation Energy, is a leading competitive supplier of natural gas, power, and energy products and services for businesses, homes, and government across the continental United States. Our retail business serves more than 100,000 business and public sector customers, including more than two-thirds of the Fortune 100. Constellation's innovative energy solutions help customers from Main Street to Wall Street gain control of energy budgets, manage energy consumption, meet environmental goals, and utilize renewable energy sources. In 2017 Constellation supplied 730 Billion Cubic Feet of natural gas to our customers.
In addition to reliable supplies of natural gas at competitive prices, Constellation customizes an energy strategy specific to our customer's goals. Constellation's SmartPortfolio solution to purchasing natural gas provides reliability, supply management and long-term price stability. Through SmartPortfolio our customers participate in a large regional pool for monthly purchases and include traditional point in time fixed price opportunities as well as systematic long-term purchases which smooths the price curve. Our risk management tools provide an effective way to manage facility operational budgets and protect against unexpected price volatility. In addition, customers receive regular natural gas market updates, webinars, and a dedicated account management team.
Constellation is an approved natural gas marketer on Black Hills Energy natural gas distribution systems in Iowa,