Texas operator · RRC P-5 531346
Mas Operating Co.
Mas Operating Co. runs 9 producing leases in 2 Texas counties. The Railroad Commission shows 23,213 barrels of oil and 231 mcf of gas in the 12 months through Jul 2026.
Operator dossier · 2 counties
- Producing leases
- 9
- Counties
- 2
- Biggest county
- Winkler County
- Biggest field
- Hendrick
Get checks from Mas Operating Co.?
Upload a royalty check stub or a phone photo. We compare each month with the state numbers for the lease and tell you what to ask.
Where they work
fewermore
- Gas, last 12 months
- 231 mcf
- RRC operator no.
- 531346
- Leases on record
- 9
- Data through
- Jul 2026
Production
Five years of Mas Operating Co. output
Oil output from Mas Operating Co. fell 8% over the last 12 months
23.2k bbl in the 12 months through Jul 2026, against 25.2k bbl in the 12 months before. Peak month: Mar 2023, 2,688 bbl.
Gas output from Mas Operating Co. fell 92% over the last 12 months
231 mcf in the 12 months through Jul 2026, against 2,962 mcf in the 12 months before. Peak month: Aug 2021, 11.3k mcf.
SourceTexas Railroad Commission, Production Data Query, summed over every lease reported under operator 531346. Reported through Jul 2026, file dated Sep 18, 2026. The newest month is often revised as operators file late.
Leases
Mas Operating Co. leases, biggest first
8,498bbl oil0% on the year before
3,132bbl oil−3% on the year before
2,606bbl oil−6% on the year before
2,497bbl oil−19% on the year before
- LECK UNIT
08-19408Winkler CountyKermit
1,925bbl oil−11% on the year before
1,758bbl oil+12% on the year before
1,415bbl oil−39% on the year before
- GLOYD
08-12960Winkler CountyKermit
905bbl oil−11% on the year before
477bbl oil−9% on the year before
Showing 9 of 9.
SourceTexas Railroad Commission, Production Data Query. Ranked by an approximate value of last-12-month output, so oil and gas wells sort together.
Where they work
Counties and fields where Mas Operating Co. produces
Counties, by Mas Operating Co. oil
Winkler County leads
Fields, by Mas Operating Co. oil
Hendrick leads
- Hendrick1 producing lease · District 08 · Field 404060018,498bbl
- Keystone (Colby)2 producing leases · District 08 · Field 491291324,364bbl
- Keystone (Consolidated)2 producing leases · District 08 · Field 491291503,912bbl
- Crockett1 producing lease · District 7C · Field 217660013,132bbl
- Kermit2 producing leases · District 08 · Field 490380012,830bbl
- Scarborough1 producing lease · District 08 · Field 81392001477bbl
Recent drilling permits for Mas Operating Co.
No recent drilling permits for Mas Operating Co. are in our data yet.
How to read the statement
How to read a Mas Operating Co. royalty statement
The header: who paid you, and for which check
Look for the payor name, your owner number, the check number and the check date. Keep the owner number: every call or letter to the operator starts with it.
What we knowMas Operating Co. is Railroad Commission operator 531346. The name on your check may be a parent company or a payment subsidiary.
The property line: which lease this is
Each lease you own in gets its own block, named as the operator names it. That name can be shorter than the state's, or carry a suffix such as a well number or unit letter.
What we knowMas Operating Co. runs 9 producing leases across 2 counties, so one check can list many properties. Find yours in the table above by name, or search for the name printed on the stub.
Product and volume: barrels, mcf, and the month
The stub shows the production month (the production month, not the check month), the product and your share of the volume. Divide your volume by your decimal to get the lease total, then compare it with the lease page.
What we knowFor example, open HENDRICK, T. G. -F-, UNIVERSITY -K- or WALTON, J. B., TRACT -B- and read the “oil sold” and “gas sold” columns.
Price: what the operator says it got
Oil is usually close to the WTI benchmark for the month. Gas prices vary widely: they depend on where the gas is sold and on what the operator subtracts before it reports a price.
Deductions: gathering, compression, processing
Costs taken after the well. Some leases allow them and some do not; your lease and division order say which. A deduction that appears in one month and not the next is worth a question.
What we knowAbout 100% of the gas Mas Operating Co. reported in the last 12 months went straight into pipelines rather than to a processing plant. A processing fee on that gas is worth asking about.
Taxes: severance and ad valorem
Texas severance tax is taken from your share: 4.6% of oil value and 7.5% of gas value at market. Ad valorem tax may also appear. The rate on your stub should match these.
Net: gross, minus deductions and taxes, times your share
Check the arithmetic: volume times price gives gross value, then subtract deductions and taxes. If the net does not match your check, or a month is missing, that is the first thing to ask about.
At a glance
Mas Operating Co.
- RRC operator number (P-5)
- 531346
- Producing leases
- 9
- Counties
- 2
- Biggest county
- Winkler County
- Oil, last 12 months
- 23,213 bbl
- Gas sent to plants
- 0.0%
- Gas sold to pipelines
- 100%
- Gas flared or vented
- 0.0%
Owner relations
Who to call at Mas Operating Co.
We have not yet added Mas Operating Co.’s owner relations phone, mailing address or online portal. It is usually printed at the top or bottom of your statement. The Railroad Commission also holds an address for the operator under number 531346.
When there is something to ask