Home / Operators / Occidental
NYSE: OXY · Houston, Texas · Permian-led U.S. independent

Occidental
Petroleum

A publicly traded U.S. independent producer with one of the largest Permian Basin positions in the country, plus DJ Basin, Anadarko, and Hugoton acreage carried over from the Anadarko Petroleum acquisition.

3
Active Basins
Permian, DJ, Anadarko
5
States
TX, NM, CO, WY, OK
1920
Founded
Los Angeles roots
2
Predecessors
Anadarko, CrownRock
Public
Status
NYSE: OXY
01 The Company

Who Occidental is, and what they hold.

A publicly traded U.S. independent with one of the largest Permian positions in the country, anchored by the 2019 Anadarko acquisition and deepened by CrownRock in 2024.

Occidental Petroleum, commonly referenced by its ticker OXY, is a publicly traded U.S. independent oil and gas producer headquartered in Houston, Texas. Following the 2019 acquisition of Anadarko Petroleum and the 2024 acquisition of CrownRock LP, Occidental holds among the largest Permian Basin positions of any operator in the country, alongside material positions in the DJ Basin in Colorado and parts of the Anadarko and Hugoton areas in Oklahoma and adjacent regions.

The Anadarko Petroleum legacy is particularly important for mineral owners. Despite the 2019 acquisition, the Anadarko name remains a frequently-encountered legacy name on royalty paperwork, particularly in the DJ Basin Wattenberg Field where Anadarko was a dominant operator for decades. Royalty statements and division orders bearing the Anadarko name almost always trace to Occidental as the current operator.

Have minerals leased to Occidental?

Send us what you have, and we will take a look.

Send Us the Details →
02 Where They Work

Three basins, with Anadarko legacy still visible everywhere.

Occidental's footprint reflects two major acquisitions plus organic activity. The Anadarko name persists on paperwork in every basin it touches.

In the Permian Basin, Occidental’s position spans both the Midland and Delaware sub-basins across multiple counties in Texas and New Mexico. The CrownRock addition in 2024 deepened the Midland Basin position particularly in Midland and Martin counties.

In the DJ Basin, the legacy Anadarko acreage concentrates in Weld County, Colorado, alongside the operator’s other Wattenberg Field holdings. The company’s Anadarko Basin positions in Oklahoma, plus Hugoton-area gas in southwestern Kansas and the Texas Panhandle, round out the U.S. onshore footprint in our coverage.

03Corporate History

Recent activity, andwhat is behind it.

Material events that affected Occidental's operating footprint and, by extension, mineral owners on its leased acreage.

  1. 2024
    Closed acquisition of CrownRock LP, a Midland Basin operator backed by CrownQuest Operating, deepening the Midland Basin position. Source: Occidental press release, August 1, 2024.
  2. 2019
    Closed acquisition of Anadarko Petroleum, adding Anadarko's substantial DJ Basin, Permian, and Gulf of Mexico positions. Source: Occidental press release, August 8, 2019.
04Predecessors and Acquisitions

Names that becameOccidental.

If a division order or royalty statement shows one of these names, the operator of record on the well today is Occidental. The underlying interest carried over unchanged through each transaction.

Anadarko Petroleum
Acquired
2019
Closed August 2019. Added Anadarko's substantial DJ Basin (Wattenberg), Permian, and Gulf of Mexico positions. Anadarko remains a frequently-encountered legacy name on royalty paperwork.
Rolled into Occidental PetroleumView page →
Crownrock LP
Acquired
2024
Closed August 2024. CrownRock LP was a private Midland Basin operator backed by CrownQuest Operating; the acquisition deepened Occidental's Midland Basin position particularly in Midland and Martin counties, Texas.
Rolled into Occidental Petroleum
Division order shows an old name?

If your statements still say Anadarko or CrownRock, we can trace it.

Send Us the Details →
05 What This Means for Mineral Owners

If you receive royalty checks from Occidental.

Occidental's two recent acquisitions and the durability of the Anadarko brand on legacy paperwork both shape what mineral owners see on statements.

Receiving royalty checks from Occidental Petroleum means you own a fractional interest in producing wells operated by Occidental, often abbreviated OXY. The company’s footprint expanded substantially through two recent acquisitions: Anadarko Petroleum in 2019 and CrownRock LP in 2024. Both transactions transferred operator of record on a meaningful number of wells, and many royalty owners continue to see legacy names on their paperwork as a result.

Occidental’s main operating areas in our 12-state footprint are the Permian Basin in Texas and New Mexico, now one of the largest single positions of any operator, the DJ Basin in Colorado, the Anadarko Basin in Oklahoma, and parts of the Powder River Basin in Wyoming. Wattenberg owners in particular are likely to encounter Occidental: Anadarko was the dominant Wattenberg operator for decades before the 2019 acquisition, and Occidental now operates the wells previously branded under that name.

The Anadarko legacy is unusually persistent. Despite the 2019 close, Anadarko remains a frequently-encountered legacy name on royalty paperwork. Re-issuance of division orders takes time, and many mineral owners still see the Anadarko name on the property line of their statements even when Occidental is the remitter. The underlying mineral interest, the royalty rate, and the legal description on the division order do not change as a result of the corporate transaction.

If you have a question about a specific Occidental-paid or Anadarko-era interest, the operator’s owner relations channel handles account-level questions (decimal interest, statements, address changes, probate updates). The relevant state regulator’s well database confirms operator-of-record status by API number. We are happy to help you read what you have and identify what is missing if the Anadarko-to-Occidental chain makes the records hard to follow.

Want context on your specific account?

Send us what you have. We can walk through it.

Send Us the Details →
06Questions Mineral Owners Ask

What peopleactually ask about Occidental.

We have walked through these conversations with mineral owners many times. Below are honest answers to the things people most often want to know.

01
How do I update my mailing address with Occidental?
Occidental publishes its owner relations contact channel at oxy.com/contact-us. The request typically needs to be in writing, signed, and submitted with an updated W-9. Address changes filed with Occidental cover statements issued under the Anadarko legacy name as well, since Occidental is the current operator on those wells. We are not affiliated with Occidental and cannot resolve account-level questions on the operator's behalf.
02
My division order shows Anadarko Petroleum. What changed?
Occidental acquired Anadarko Petroleum in August 2019. Anadarko's substantial DJ Basin Wattenberg position became part of Occidental, alongside Anadarko's Permian and Gulf of Mexico assets. If your division order still shows Anadarko, the underlying mineral interest carried over to Occidental unchanged. Your royalty rate and decimal interest should be the same. The Colorado ECMC well search by API number confirms Occidental as the current operator of record on former Anadarko wells in Colorado.
03
My Midland Basin checks switched from CrownRock to Occidental in 2024. What happened?
Occidental closed the acquisition of CrownRock LP in August 2024. CrownRock was a private Midland Basin operator backed by CrownQuest Operating, with positions concentrated in Midland and Martin counties, Texas. Royalty owners on former CrownRock wells should expect re-issued division orders in the Occidental name. Your decimal interest should reconcile across the transition; if it does not, that is almost always a transcription issue that owner relations can correct.
04
How do I confirm Occidental is the current operator on a specific well?
Each state regulator publishes a public well database. The Texas Railroad Commission, New Mexico Oil Conservation Division, Colorado ECMC, Wyoming Oil and Gas Conservation Commission, and Oklahoma Corporation Commission all maintain searchable records by API number or by section, township, and range. The current operator of record is shown in the well's permit data. Many former Anadarko wells still appear in older paperwork under the Anadarko name even though Occidental operates them today.
05
Can I sell mineral rights that pay royalties through Occidental?
Yes. Mineral rights paid through Occidental are bought and sold the same way as any other producing interest. The sale of your mineral interest does not require Occidental's involvement; it is a transaction between you and the buyer. We are happy to look at what you have and walk through what it might be worth, whether your statements show Occidental, Anadarko, or CrownRock.
06
I think an Occidental royalty payment is late or short. What is the right next step?
The first thing to check is whether the well was producing during the relevant production month. Operators typically pay one to three months in arrears. If timing checks out and the amount looks wrong, the most common issue is decimal interest transcribed incorrectly during a re-issue, particularly after the Anadarko or CrownRock transitions. Occidental's owner relations team can pull the calculation. They generally need the property name or well number from the statement to research it.
07
I inherited mineral rights and the prior owner's name is on Occidental's payment. How do I get the account changed?
This requires probate documentation. Once the estate has been probated and you have Letters Testamentary or equivalent court paperwork showing you are the rightful heir, you submit copies along with a recorded conveyance (mineral deed of distribution, probate decree, or similar) to Occidental's owner relations team, plus a new W-9 in your name. They will then re-issue the division order. If the estate is still in probate, payments may be held in suspense until the chain of title is clear.

Need help with
Occidental Petroleum
minerals?

Send us what you have, or what you think you have. If your statements are from Occidental Petroleum, or from a name they acquired, we can pull operator data, check decimal interest math, and put together a plain-English summary with our reasoning. If it makes sense to go further, we move on your timeline. If not, you have a free breakdown you can take anywhere.

Request a Valuation (512) 626-7267
Free · No Obligation · Your Timeline

For account-level questions (decimal interest, statements, address changes, probate updates): Occidental owner relations → · Investor relations and SEC filings →

Information about Occidental Petroleum on this page is drawn from publicly available sources, including company press releases, SEC filings where applicable, state regulator data, and mainstream news reporting. It is current as of May 2026. Operator ownership, corporate structure, and active basins can change. Verify current status with the operator directly before making any decisions about a lease, division order, or sale.

07 Other Operators

More names in the same basins.

Permian Basin
ExxonMobil
Among the largest energy companies in the world, ExxonMobil's U.S. onshore production runs through XTO Energy and now includes the former Pioneer Natural Resources position in the Permian Basin.
View page  →
DJ Basin
Chevron Corporation
A multinational integrated energy company with major U.S. onshore positions in the DJ Basin, the Permian, and following the 2025 close of the Hess acquisition, the Bakken.
View page  →
Permian Basin
Diamondback Energy
A publicly traded Permian-focused producer headquartered in Midland, Texas. Following the 2024 Endeavor Energy Resources merger, Diamondback holds among the largest pure-play Permian Basin positions in the country.
View page  →