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Royalty Clerk

Texas operator · P-5 745991

San Isidro Development Co, L. C.

The Railroad Commission lists San Isidro Development Co, L. C. as operator number 745991, P-5 active, in Sandia, TX. Its leases reported 15,528 barrels of oil and 1,817 mcf of gas in the last twelve months.
The state recordGot a letter from them?

Facts and their sources. No rating, no opinion.

The record

What the state's files show about San Isidro Development Co, L. C.

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
SAN ISIDRO DEVELOPMENT CO, L. C.
Operator number (P-5)
745991
P-5 status
Active
Organization type
Limited liability company (code not in the RRC's 2014 layout; inferred from the names)
Location
Sandia, TX
Mailing city
Sandia, TX
Activities filed
Gas Operator, Oil Operator
Last P-5 received
June 25, 2026
Record built
August 25, 2003
Refiling required
Yes

Source: Railroad Commission of Texas, P-5 Organization Report data set, as of September 22, 2026.

Owner relations

How to reach San Isidro Development Co, L. C. as an owner

Not checked yet

We have not checked San Isidro Development Co, L. C.’s owner-relations desk yet. Here is how owners usually find it:

  1. Look at a recent check stub or statement. The phone number and address printed on it usually reach the owner relations department.
  2. Search the company’s own website for “owner relations” or “royalty owners”. Larger operators have a page and an online owner portal.
  3. The Railroad Commission file above has the company’s mailing address. A letter sent there reaches the company, though not always the right desk.
  4. Put your owner number and the property name or number on every letter and call.

Comptroller and Secretary of State

The business entity on file

Legal name
SAN ISIDRO DEVELOPMENT COMPANY, L.C.
Taxpayer number
17428344430
Entity type
Texas limited liability company
Secretary of State file number
0702278522
Secretary of State status
Active (December 20, 1996)
Right to transact business in Texas
Active
Formed
December 20, 1996
Formed in
TX
Mailing city
Sandia, 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 0702278522), Comptroller account status.

Production

What the state's reports show

Oil, last 12 months
15,528 barrels
Down 6.8% from the 12 months before
Gas, last 12 months
1,817 mcf
Down 62.9% from the 12 months before

Oil reported each month, in barrels

  • Jul 20261,382
  • Jun 20261,351
  • May 20261,305
  • Apr 20261,233
  • Mar 20261,093
  • Feb 20261,006
  • Jan 20261,213
  • Dec 20251,373
  • Nov 20251,201
  • Oct 20251,345
  • Sep 20251,325
  • Aug 20251,701

Source: Railroad Commission of Texas, production data query, as of July 1, 2026.

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

11 leases on the state record, 6 with production in the last twelve months. The largest by production:

Operator changes

Leases this company took over or handed over

10 taken over and 5 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.

  • Took over 76 Ranch MCM, McMullen CountyOct 2022 · from Chesapeake Operating, L.L.C.
  • Took over Zamora A, Webb CountyOct 2022 · from Lewis Petro Properties, Inc.
  • Took over Zamora A, Webb CountyOct 2022 · from Lewis Petro Properties, Inc.
  • Took over Rooke, Refugio CountyJun 2022 · from Acock/Anaqua Operating Co., LP
  • Took over Rooke, Refugio CountyJun 2022 · from Acock/Anaqua Operating Co., LP
  • Took over Rooke, Refugio CountyJun 2022 · from Acock/Anaqua Operating Co., LP
  • Took over Rooke, Refugio CountyJun 2022 · from Acock/Anaqua Operating Co., LP
  • Took over Rooke, Refugio CountyJun 2022 · from Acock/Anaqua Operating Co., LP
  • Took over Rooke, Refugio CountyJun 2022 · from Acock/Anaqua Operating Co., LP
  • Took over Rooke, Refugio CountyJun 2022 · from Acock/Anaqua Operating Co., LP
  • Handed over Ramirez, C. H. Minerals, LTD B, Webb CountyMay 2020 · to Encina Resources, LLC
  • Handed over Ramirez, C. H. Minerals, LTD B, Webb CountyMay 2020 · to Encina Resources, LLC

Use it

Follow this company, or check a paper it sent you

New permits and production

One email a week when San Isidro Development Co, L. C. files a drilling permit, completes a well or reports first production. Free with an account.

Leases, counties and fields for San Isidro Development Co, L. C.

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.

Read a letterCheck a buyout offerCheck a lease offer

FAQ

Questions people ask

Who is San Isidro Development Co, L. C.?

The Railroad Commission lists San Isidro Development Co, L. C. as operator number 745991, P-5 active, in Sandia, TX. Its leases reported 15,528 barrels of oil and 1,817 mcf of gas in the last twelve months.

Is San Isidro Development Co, L. C. a registered business in Texas?

The Comptroller's franchise tax file lists a business entity that matches the company: SAN ISIDRO DEVELOPMENT COMPANY, L.C., a texas limited liability company, Secretary of State status Active, right to transact business in Texas: Active. Confirm it in the Secretary of State's business search.

How much oil and gas did San Isidro Development Co, L. C. report?

In the last twelve months the leases San Isidro Development Co, L. C. operates reported 15,528 barrels of oil and 1,817 mcf of gas to the Railroad Commission, through July 1, 2026. It has 11 leases on the state record, 6 with production in that time.

I got a letter or an offer from San Isidro Development Co, L. C.: 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.

Upload the letter

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

Sources

Primary sources, opened on 29 September 2026. Statute text is the current version on statutes.capitol.texas.gov.