Texas operator and buyer · P-5 876520
Union Oil Company of California
Facts and their sources. No rating, no opinion.
The record
What the state's files show about Union Oil Company of California
Railroad Commission record
Who the state lists
The Railroad Commission lists this company as an operator, and the state's records list it as a purchaser or gatherer.
- Name on file
- UNION OIL COMPANY OF CALIFORNIA
- Operator number (P-5)
- 876520
- P-5 status
- Inactive
- Organization type
- Corporation
- Location
- Midland, TX
- Mailing city
- Midland, TX
- Last P-5 received
- November 18, 2020
- Record built
- June 17, 1977
- Inactive since
- February 1, 2023
- Refiling required
- Yes
The Railroad Commission lists this company’s P-5 registration as inactive since February 1, 2023. If your royalty checks from it stopped, check your lease for the likely reasons and who to write to.
Source: Railroad Commission of Texas, P-5 Organization Report data set, as of September 22, 2026.
Owner relations
How to reach Union Oil Company of California as an owner
Not checked yet
We have not checked Union Oil Company of California’s owner-relations desk yet. Here is how owners usually find it:
- Look at a recent check stub or statement. The phone number and address printed on it usually reach the owner relations department.
- Search the company’s own website for “owner relations” or “royalty owners”. Larger operators have a page and an online owner portal.
- The Railroad Commission file above has the company’s mailing address. A letter sent there reaches the company, though not always the right desk.
- Put your owner number and the property name or number on every letter and call.
Name changes and sales
Union Oil Company of California is still on file under this name
We hold no record of a new name, a sale or a merger for this company. The Railroad Commission lists its P-5 registration as inactive.
Railroad Commission no. 876520
The Railroad Commission's P-5 file links this organization to number 876352 (Union Expl. Partners, Ltd.). The file does not say how the two are related, for example which is the older name.
Comptroller and Secretary of State
A possible match in the Comptroller's file
This record matched the company by name and place, not by a number both files share. Check it before relying on it.
- Legal name
- UNION OIL COMPANY OF CALIFORNIA
- Taxpayer number
- 19513154500
- Entity type
- Foreign profit corporation
- Secretary of State file number
- 0000805806
- Secretary of State status
- Active (March 7, 1934)
- Right to transact business in Texas
- Active
- Formed
- March 7, 1934
- Formed in
- Outside Texas (the file does not say where)
- Mailing city
- San Ramon, CA
Source: Texas Comptroller, franchise tax permit holder file (data.texas.gov), as of September 26, 2026.
Look it up yourself: Secretary of State business filings (search for file number 0000805806), Comptroller account status.
Production
What the state's reports show
- Oil, last 12 months
- 303,500 barrels
- Gas, last 12 months
- 182,640 mcf
Oil reported each month, in barrels
- Dec 202024,519
- Nov 202023,834
- Oct 202024,332
- Sep 202023,319
- Aug 202024,669
- Jul 202025,779
- Jun 202024,793
- May 202026,333
- Apr 202025,879
- Mar 202026,713
- Feb 202025,474
- Jan 202027,856
Source: Railroad Commission of Texas, production data query, as of December 1, 2020.
Drilling permits
Permits filed with the state
0 drilling permits in the last three years. A permit is permission to drill. It is not a well.
Source: Railroad Commission of Texas, drilling permit records.
Leases
Leases this company operates
5 leases on the state record, 0 with production in the last twelve months. The largest by production:
Operator changes
Leases this company took over or handed over
0 taken over and 100 handed over since the state's history begins; 0 and 0 in the last twelve months. The month is the first month the change shows in production reports.
- Handed over Swain, W.f. 14, Van Zandt CountyJan 2021 · to Basa Resources, Inc.
- Handed over Crim, J. F. 16, Van Zandt CountyJan 2021 · to Basa Resources, Inc.
- Handed over Shivers, J. R. 12, Van Zandt CountyJan 2021 · to Basa Resources, Inc.
- Handed over Leonard, J. M. 30, Van Zandt CountyJan 2021 · to Basa Resources, Inc.
- Handed over Thompson, I. W. 401, Van Zandt CountyJan 2021 · to Basa Resources, Inc.
- Handed over Oliver, J. R. 207, Van Zandt CountyJan 2021 · to Basa Resources, Inc.
- Handed over Bracken, J. A. 503, Van Zandt CountyJan 2021 · to Basa Resources, Inc.
- Handed over Van,sw Lewisville Unit, Van Zandt CountyJan 2021 · to Basa Resources, Inc.
- Handed over Smith, F. B. 104, Van Zandt CountyJan 2021 · to Basa Resources, Inc.
- Handed over Bracken, J. A. 503, Van Zandt CountyJan 2021 · to Basa Resources, Inc.
- Handed over York, W. A. 13, Van Zandt CountyJan 2021 · to Basa Resources, Inc.
- Handed over Swain, W. F. 9, Van Zandt CountyJan 2021 · to Basa Resources, Inc.
Use it
Follow this company, or check a paper it sent you
New permits and production
One email a week when Union Oil Company of California files a drilling permit, completes a well or reports first production. Free with an account.
A paper from this company
A division order, a lease, a buyout offer or a letter: upload it and we say what it is, what it asks and which terms deserve a question.
FAQ
Questions people ask
Who is Union Oil Company of California?
The Railroad Commission lists Union Oil Company of California as operator number 876520, P-5 inactive, in Midland, TX. Its leases reported 303,500 barrels of oil and 182,640 mcf of gas in the last twelve months. The state's records also list it as a purchaser or gatherer.
Is Union Oil Company of California a registered business in Texas?
The Comptroller's franchise tax file lists a possible match by name and place: UNION OIL COMPANY OF CALIFORNIA, a foreign profit corporation, Secretary of State status Active, right to transact business in Texas: Active. The match is by name and place, not by a number both files share, so check it before relying on it. Confirm it in the Secretary of State's business search.
How much oil and gas did Union Oil Company of California report?
In the last twelve months the leases Union Oil Company of California operates reported 303,500 barrels of oil and 182,640 mcf of gas to the Railroad Commission, through December 1, 2020. It has 5 leases on the state record, 0 with production in that time.
I got a letter or an offer from Union Oil Company of California: what should I do?
Do not sign or call yet. Keep every page and the envelope, compare the paper with your deed, lease and last statements, and answer in writing. You can upload the letter to have it read: it says what kind of paper it is, what it asks, and which terms deserve a question, quoting the words they come from.
Where does this page's information come from, and how current is it?
The record is the Railroad Commission's P-5 Organization Report file, dated September 22, 2026. The entity is the Comptroller's franchise tax file. Production, permits and leases are the Commission's own reports. The page shows no rating and no opinion.
Related
Keep going
- Texas dataTexas oil and gas companiesOperators and buyers: the state's record, permits, leases, production.
- HelpI got a letter from an oil companyUpload it. We say what it is, what it asks and what to look at.
- ToolTexas well watchPermit, completion, first production and when the first check is due.
- Texas dataTexas operator changesWho took over whose leases in the last 24 months.
- CheckCheck my statementUpload a stub. Every month against the state record.
- HelpTexas division ordersWhat you may sign, what you may refuse, what to check.
Sources
Primary sources, opened on 29 September 2026. Statute text is the current version on statutes.capitol.texas.gov.