An energy company is a company which operates within the energy industry, which can be involved in the production and sale of energy, including fuel extraction, manufacturing, refining and distribution. The companies listed below are traded on public stock exchanges, as such those shares traded on the NYSE, as indicated by the relevant ticker symbol. In January, 2017, more than 450 companies were listed on the Brazilian stock exchange B3, according to the exchange's website. The following is a list of the components of Ibovespa, B3 index, in the period January - April 2018, their B3 ticker symbol, industry and headquarters SA, oil and gas, Rio de Janeiro · Petrobras These 10 gas and oil stocks are rated highest by TheStreet Ratings' value- focused stock rating model. Equity Top: Oil, Gas & Consumable Fuel. Symbol.