The largest oil company in the world by market capitalization, daily production volume, and overall financial profitability is Saudi Aramco, the state-owned petroleum and natural gas giant of Saudi Arabia. Operating massive low-cost onshore and offshore reservoirs, the company supplies a significant percentage of global crude oil demand. Among publicly traded Western oil supermajors, corporations like ExxonMobil and Shell occupy leading positions in terms of revenue, asset scale, and global operational footprints spanning upstream, midstream, and downstream sectors.