Chevron Corporation (CVX) is the second-largest integrated oil company in the US, after ExxonMobil Corp (XOM). It is included in the ‘Big Oil’ category, which comprises the six largest publicly-owned oil and gas companies, namely: Exxon, Royal Dutch Shell plc (RDS.A), BP plc (BP), Total S.A. (TOT) and ConocoPhillips Co. (COP).
Chevron is involved in the exploration of oil and gas reserves, their extraction, the production and refinement of crude oil, and the marketing of petroleum products to end-users. Exploration and production (E&P) forms its upstream segment, while refining and marketing activities (R&M) are part of its downstream segment. CVX.