XOM — Exxon Mobil Corporation

Chevron is one of the largest integrated oil and gas companies in the world, with upstream exploration and production operations in the Permian Basin, Gulf of Mexico, Australia (LNG), Kazakhstan, and other regions. Its downstream refining operations produce gasoline, jet fuel, and petrochemicals, while chemicals and lubricants generate additional revenue. Chevron is one of the most financially disciplined major oil companies, known for variable dividend commitments and share buybacks tied to cash flow. Chevron attempted to acquire Hess Corporation in 2023, which faced arbitration complications related to Guyana.

ConocoPhillips is the world's largest independent oil and gas exploration and production company, having divested its downstream refining assets in 2012. The company focuses exclusively on upstream production across the Permian Basin, Eagle Ford, Bakken, Alaska, Canada, Norway, Australia, and other international basins. ConocoPhillips is known for disciplined capital allocation, a low cost of supply (breakeven price), and a shareholder-return framework that prioritizes variable returns of capital (VROC) above base dividends.

SLB (formerly Schlumberger) is the world's largest oilfield services company, providing technology, equipment, and services for oil and gas exploration and production. The company's portfolio spans seismic data and reservoir characterization, drilling, well construction, well completions, and production optimization. SLB operates in over 100 countries and is a critical technology partner to national oil companies (NOCs), integrated majors, and independents. The company is also investing in digital and energy transition services.

EOG Resources is one of the largest and most technically sophisticated independent oil and gas companies in the United States, with premier acreage in the Permian Basin, Eagle Ford, Bakken, and Delaware Basin. EOG's culture emphasizes decentralized decision-making, technology-driven well performance, and strict capital discipline. The company consistently achieves best-in-class drilling efficiency and well productivity metrics, generating strong returns on capital even at moderate oil prices.