# Top Oil & Gas Operators: Understanding the Companies That Develop Mineral Rights

**TL;DR:** Mineral owners work with oil and gas operators who lease, drill, and produce wells on their property. This guide profiles the largest U.S. operators—from supermajors like ExxonMobil and Chevron to independent producers like Devon Energy and Diamondback—explaining their operational footprints, acquisition histories, and what mineral owners should know about each company's owner relations practices.

## Key Takeaways

- **Operators hold working interests and pay all drilling costs; mineral owners receive royalty payments without bearing operational expenses**—the operator is determined by who leases your minerals, not by owner choice
- **ExxonMobil became the dominant Permian operator after acquiring Pioneer Natural Resources in 2024**, now controlling over 1.4 million net acres and producing approximately 1.3 million barrels of oil equivalent per day from the basin
- **Recent industry consolidation includes ExxonMobil-Pioneer, ConocoPhillips-Marathon Oil, Diamondback-Endeavor, and Occidental-CrownRock acquisitions in 2024**, with transition periods of 1-3 months typical as payment systems merge
- **Major integrated companies (supermajors) like ExxonMobil, Chevron, and ConocoPhillips operate globally across exploration, production, refining, and retail**, while independent operators focus primarily on drilling and production in specific basins
- **Mineral owners can identify their operator through royalty statements, state regulatory databases (Texas RRC, Oklahoma OCC, North Dakota Industrial Commission), lease documents, or division orders**
- **Mergers and acquisitions do not change existing lease terms**—the acquiring operator assumes all obligations, though new division orders and temporary payment delays are common during transitions
- **Most large operators maintain dedicated owner relations departments with phone support and online portals** (ExxonMobil, Chevron, Devon's DevonConnect, Occidental's OxyLink) for royalty statement access and account management
- **Each state's oil and gas regulatory agency maintains public records of all operators and well data**, providing mineral owners with resources to verify operational information and resolve disputes

## Page Highlights

**Understanding Operators vs. Mineral Owners**: Operators hold working interests, pay drilling costs, manage operations, and are responsible for royalty payments. Mineral owners hold rights but bear no costs. The operator is determined by who leases and develops your minerals.

**ExxonMobil**: The largest U.S. oil company by market cap operates primarily in the Permian Basin, Bakken, and Gulf of Mexico. After acquiring Pioneer in 2024, ExxonMobil holds 1.4 million net acres in the Permian with extensive owner relations infrastructure.

**Chevron**: The second-largest integrated company holds 2.2 million net acres in the Permian (Delaware and Midland Basins) and DJ Basin operations following PDC Energy acquisition. Known for detailed royalty statements and reliable payment schedules.

**ConocoPhillips**: The largest pure-play E&P company expanded through Marathon Oil acquisition in 2024, adding Eagle Ford and Bakken acreage. Operates across multiple basins with regional owner relations offices.

**Occidental Petroleum**: Holds approximately 2.8 million net acres primarily in the Permian after acquiring Anadarko (2019) and CrownRock (2024). Offers OxyLink portal for mineral owner account access.

**Devon Energy**: Multi-basin operator with strong Delaware Basin presence, headquartered in Oklahoma City. Provides DevonConnect online portal and has dedicated owner relations for Oklahoma mineral owners.

**Diamondback Energy**: Permian pure-play based in Midland that acquired Endeavor Energy in 2024. Known for efficient operations, low breakeven costs, and deep local Permian expertise.

**EOG Resources**: One of the largest independents operating across Permian, Eagle Ford, Bakken, and Powder River basins. Pioneer of horizontal drilling in shale formations with regional offices providing localized support.

**Continental Resources**: Largest private U.S. oil company and Bakken pioneer, went private in 2022. Maintains owner relations despite not being subject to public company reporting requirements.

**Merger and Acquisition Impacts**: Industry consolidation means operators change but lease terms remain unchanged. Expect 1-3 month transition periods, new division orders, and communication from both selling and acquiring companies.

**Finding Your Operator**: Check royalty statements, search state regulatory databases (Texas Railroad Commission, Oklahoma Corporation Commission, North Dakota Industrial Commission, etc.), review lease/division order documents, or contact mineral buyers for identification assistance.

## Related Topics

- [Permian Basin overview and operator landscape](https://www.buckheadenergy.com/basins/permian)
- [Delaware Basin specifics](https://www.buckheadenergy.com/basins/delaware)
- [Midland Basin operations](https://www.buckheadenergy.com/basins/midland)
- [Eagle Ford Shale operator information](https://www.buckheadenergy.com/basins/eagle-ford)
- [Bakken/Williston Basin details](https://www.buckheadenergy.com/basins/bakken)
- [Understanding oil and gas leases](https://www.buckheadenergy.com/learn/oil-gas-lease)
- [Division orders explained](https://www.buckheadenergy.com/learn/division-orders)
- [Royalty payment fundamentals](https://www.buckheadenergy.com/learn/royalty-payments)

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