Texas operator · P-5 101846
Mammoth Operating LLC
Facts and their sources. No rating, no opinion.
The record
What the state's files show about Mammoth Operating LLC
Railroad Commission record
Who the state lists
The Railroad Commission lists this company as an operator: it reports wells and leases in Texas.
- Name on file
- MAMMOTH OPERATING LLC
- Operator number (P-5)
- 101846
- P-5 status
- active
- Organization type
- Limited liability company (code not in the RRC's 2014 layout; inferred from the names)
- Location
- Spicewood, TX
- Mailing city
- Spicewood, TX
- Activities filed
- Oil Operator
- Last P-5 received
- December 1, 2025
- Record built
- December 19, 2023
- Refiling required
- Yes
Source: Railroad Commission of Texas, P-5 Organization Report data set, as of September 22, 2026.
Comptroller and Secretary of State
The business entity on file
- Legal name
- MAMMOTH OPERATING LLC
- Taxpayer number
- 32052625467
- Entity type
- Texas limited liability company
- Secretary of State file number
- 0801893838
- Secretary of State status
- Reinstated (July 28, 2025)
- Right to transact business in Texas
- Active
- Formed
- December 5, 2013
- Formed in
- TX
- Mailing city
- Spicewood, TX
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 0801893838), Comptroller account status.
Production
What the state's reports show
- Oil, last 12 months
- 3,074 barrels
- Down 10.7% from the 12 months before
- Gas, last 12 months
- 0 mcf
Oil reported each month, in barrels
- Jul 2026194
- Jun 2026235
- May 2026228
- Apr 2026205
- Mar 2026223
- Feb 2026141
- Jan 2026146
- Dec 2025254
- Nov 2025264
- Oct 2025372
- Sep 2025466
- Aug 2025346
Source: Railroad Commission of Texas, production data query, as of July 1, 2026.
Drilling permits
Permits filed with the state
1 drilling permits in the last three years: 1 in 2026. A permit is permission to drill. It is not a well.
| Issued | Lease, county and type |
|---|---|
| 2026-07-17 | MCCLURG, M. L. #18Young County · Vertical |
Source: Railroad Commission of Texas, drilling permit records.
Leases
Leases this company operates
6 leases on the state record, 5 with production in the last twelve months. The largest by production:
Operator changes
Leases this company took over or handed over
6 taken over and 1 handed over since the state's history begins; 0 and 1 in the last twelve months. The month is the first month the change shows in production reports.
- Handed over Northwest Valera Unit, Coleman CountyNov 2025 · to Rolling Hills Oil & Gas, Inc
- Took over Northwest Valera Unit, Coleman CountyApr 2025 · from TLH Production LLC
- Took over Henderson, O C, Jack CountyApr 2025 · from Wineglass Production, LLC
- Took over Henderson, Jack CountyOct 2024 · from Wineglass Production, LLC
- Took over Drum, L. R., Young CountyJan 2024 · from J-LYN Oil Co.
- Took over McClurg, M. L., Young CountyJan 2024 · from J-LYN Oil Co.
- Took over Edwards 127, Young CountyJan 2024 · from J-LYN Oil Co.
Use it
Follow this company, or check a paper it sent you
New permits and production
One email a week when Mammoth Operating LLC 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 Mammoth Operating LLC?
The Railroad Commission lists Mammoth Operating LLC as operator number 101846, P-5 active, in Spicewood, TX. Its leases reported 3,074 barrels of oil and 0 mcf of gas in the last twelve months.
Is Mammoth Operating LLC a registered business in Texas?
The Comptroller's franchise tax file lists a business entity that matches the company: MAMMOTH OPERATING LLC, a texas limited liability company, Secretary of State status Reinstated, right to transact business in Texas: Active. Confirm it in the Secretary of State's business search.
How much oil and gas did Mammoth Operating LLC report?
In the last twelve months the leases Mammoth Operating LLC operates reported 3,074 barrels of oil and 0 mcf of gas to the Railroad Commission, through July 1, 2026. It has 6 leases on the state record, 5 with production in that time.
How many drilling permits has Mammoth Operating LLC filed?
1 drilling permits in the last three years in the permit feed this site reads. A permit is permission to drill, not a well: many are never drilled.
I got a letter or an offer from Mammoth Operating LLC: 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.