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Royalty Clerk

Texas oil lease · RRC district 6E · Lease 06438

Producing

COX

Cox is an oil lease in Rusk County, Texas, operated by ZTH Operating, LLC in the East Texas field. The Railroad Commission shows 1,854 bbl of oil in the 12 months through Jul 2026.

Oil lease dossier · 8 wells

1,854bbl oil, last 12 months+4% vs prior year
Operator
ZTH Operating, LLC
County
Rusk County
Field
East Texas
RRC lease
6E-06438

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Where it sits

This county

Rusk CountyRuskPanolaGreggUpshurShelbySmithHarrisonCherokeeRusk County
Rusk County · RRC district 6EOpen Rusk County →
Oil in Jul 2026
160 bbl
Reporting to the state
since Jan 2020
Wells
8
Data through
Jul 2026

Production

Month by month, from the state record

What the Railroad Commission says this oil lease produced. Oil is in barrels (bbl). Gas is in thousand cubic feet (mcf).

Oil output rose 4% over the last 12 months

1,854 bbl in the 12 months through Jul 2026, against 1,788 bbl in the 12 months before.

  • Oil (bars, left axis)
  • Last 12 months
Oil output rose 4% over the last 12 monthsMonthly oil production for COX, Aug 2023 to Jul 2026. Oil output rose 4% over the last 12 months. 1,854 bbl in the 12 months through Jul 2026, against 1,788 bbl in the 12 months before.Last 12 months: 1,854 bblbbl per month050100150200250Oct 23Jan 24AprJulOctJan 25AprJulOctJan 26AprJul
Oil output rose 4% over the last 12 monthsMonthly oil production for COX, Aug 2023 to Jul 2026. Oil output rose 4% over the last 12 months. 1,854 bbl in the 12 months through Jul 2026, against 1,788 bbl in the 12 months before.Last 12 monthsbbl per month050100150200250Jan 24JulJan 25JulJan 26Jul

SourceTexas Railroad Commission Production Data Query, oil lease 06438, district 6E. Reported through Jul 2026. The state revises recent months.

Gas disposition

Where the gas went

Every month the operator tells the state where each mcf of gas went, using a code. The code decides how your gas is paid.

No gas disposition reported for this lease

The operator has not reported where the gas went in the months we hold.

Operator history

Who has run this lease

The operator runs the wells and pays your royalty. When the operator changes, payments often slip for a month or two.

The operator changed once, most recently in May 2021

If your statements skip or shrink around a change, ask the new operator's owner relations department whether the month is in suspense.

Operators of this lease over timeAbleready, Inc., Jan 2020 to Apr 2021; ZTH Operating, LLC, May 2021 to Jul 20262020202120222023202420252026Changed May 2021Ableready, Inc.Jan 2020 to Apr 2021ZTH Operating, LLCMay 2021 to now
Operators of this lease over timeAbleready, Inc., Jan 2020 to Apr 2021; ZTH Operating, LLC, May 2021 to Jul 20262020202120222023202420252026Changed May 2021Ableready, Inc.Jan 2020 to Apr 2021ZTH Operating, LLCMay 2021 to now

SourceTexas Railroad Commission Production Data Query, operator by month. Reported through Jul 2026.

Wells

8 wells on this lease

Every well the Railroad Commission links to oil lease 06438 in district 6E. The API number is the state’s ID for a well.
Wells on COX
API numberWell no.Status
42-401-809031Active
42-401-809042Active
42-401-809053Active
42-401-809064Shut-in
42-401-809075Shut-in
42-401-809086Shut-in
42-401-809097Active
42-401-809108Shut-in

SourceTexas Railroad Commission Wellbore Query, district 6E, lease 06438.

Who buys and gathers

Who moves and buys this lease's production

The operator files a Form P-4 with the Railroad Commission naming the companies authorised to gather and buy the oil and gas. The buyer's price is the one your royalty is figured on.

  • Oil

    Dk Trading & Supply, LLC and Plains Marketing, L.p. gather it.

    Dk Trading & Supply, LLC gathers it: 50% of it, on the list since Feb 1, 2025 · Plains Marketing, L.p. gathers it: 50% of it, on the list since Feb 1, 2025

Companies that used to be listed: Plains Marketing, L.p. (gathers it, until Feb 1, 2025); Lion Oil Trading & Trans, LLC (gathers it, until May 1, 2021); Plains Marketing, L.p. (gathers it, until May 1, 2021); Plains Marketing, L.p. (gathers it, until May 8, 2020); Plains Marketing, L.p. (gathers it, until Sep 1, 2019); Sunoco Ptnrs. Mktg.&terminals LP (gathers it, until Sep 1, 2019).

SourceRailroad Commission of Texas, Form P-4 file, dated Sep 24, 2026 (source). A listed company is authorised to move or buy the production; the state does not say what it paid.

Who buys my oil and gasIs my oil price fair?

Unit and wells

What the drilling permits say

Acres and wells as the operator filed them on its Railroad Commission drilling permits. Your decimal is your net acres over the unit acres, so this is the number to hold your division order against.
Wells on the permits
87 not plugged
Horizontal
0
First completion
Jan 12, 1984
Latest permit
–

8 wells are listed on this lease

Each well can have its own unit. The decimal for one well does not have to equal the decimal for another.

Wells and acres on the permits for Cox
API numberWell no.Acreson the permit
42-401-809031–
42-401-809042–
42-401-809053–
42-401-809064–
42-401-809075–
42-401-809086–
42-401-809097–
42-401-809108–

SourceRailroad Commission of Texas, drilling permits and wellbore file, Sep 26, 2026 (source 1, source 2). The acres are what the operator filed; they are not a survey.

Check my decimal against the unit

Estimator

Estimate your royalty for this lease

A rough check before you look at a statement: the state volumes times your decimal, priced at WTI and Henry Hub.

Estimator

What could your check be?

Your decimal interest is the small number on your division order that says what share of the whole lease (8/8ths) is yours. Type it in and we apply it to what the state says COX sold each month.

For example 0.00097656, or a fraction like 1/1024.

Dollars per barrel. Your statements show the gap your operator uses. Leave 0 to price oil at WTI.

Your estimate appears here

Enter your decimal to see an estimated royalty for each of the last 12 months this lease reported. Nothing you type leaves your browser.

An estimate, not your check

It ignores gathering and processing fees, taxes, plant products and the price your operator actually gets, so your statement will differ. Use it as a ceiling to compare against.

Ledger

36 months, newest first

Compare these numbers with your statements. Your share of a month is the “Oil sold” volume times your decimal. Scroll sideways on a phone.
Monthly production, disposition and prices for COX
MonthOil producedbblOil soldbblWTI$ per bblHenry Hub$ per MMBtu
Jul 2026ZTH Operating,160160$80.46$2.89
Jun 2026ZTH Operating,167167$84.81$3.15
May 2026ZTH Operating,176176$102.13$2.94
Apr 2026ZTH Operating,167167$100.32$2.77
Mar 2026ZTH Operating,148148$91.38$3.04
Feb 2026ZTH Operating,150150$64.51$3.62
Jan 2026ZTH Operating,142142$60.04$7.72
Dec 2025ZTH Operating,153173$57.97$4.26
Nov 2025ZTH Operating,150150$60.06$3.79
Oct 2025ZTH Operating,151161$60.89$3.19
Sep 2025ZTH Operating,121151$63.96$2.97
Aug 2025ZTH Operating,169169$64.86$2.91
Jul 2025ZTH Operating,161161$68.39$3.20
Jun 2025ZTH Operating,213153$68.17$3.02
May 2025ZTH Operating,136136$62.17$3.12
Apr 2025ZTH Operating,144144$63.54$3.42
Mar 2025ZTH Operating,128128$68.24$4.12
Feb 2025ZTH Operating,159159$71.53$4.19
Jan 2025ZTH Operating,167160$75.74$4.13
Dec 2024ZTH Operating,153156$70.12$3.01
Nov 2024ZTH Operating,155150$69.95$2.12
Oct 2024ZTH Operating,170169$71.99$2.20
Sep 2024ZTH Operating,4262$70.24$2.28
Aug 2024ZTH Operating,160150$76.68$1.99
Jul 2024ZTH Operating,137147$81.80$2.07
Jun 2024ZTH Operating,147157$79.77$2.54
May 2024ZTH Operating,182162$80.02$2.12
Apr 2024ZTH Operating,158158$85.35$1.60
Mar 2024ZTH Operating,150150$81.28$1.49
Feb 2024ZTH Operating,52168$77.25$1.72
Jan 2024ZTH Operating,168168$74.15$3.18
Dec 2023ZTH Operating,165160$71.90$2.52
Nov 2023ZTH Operating,189174$77.69$2.71
Oct 2023ZTH Operating,173162$85.64$2.98
Sep 2023ZTH Operating,171168$89.43$2.64
Aug 2023ZTH Operating,124122$81.39$2.58

No report filed More than 3% of gas flared

SourceVolumes: Texas Railroad Commission Production Data Query, reported through Jul 2026. Prices: EIA WTI Cushing spot and Henry Hub spot, monthly, through Aug 2026. “Gas sold” is gas sent to a transmission line (code 2) or a plant (code 3).

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Around this lease

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Everything on this page connects to the operator, field and county records. Start from any of them.

This lease belongs to

OperatorZTH Operating, LLCFieldEast TexasCountyRusk County

ZTH Operating, LLC in Rusk County

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East Texas field

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Leases within 10 km

Found by the location of their wells.

  • COX-FJ

    1,345 bbl last 12 months · 0.1 km away

  • PENNY

    1,217 bbl last 12 months · 0.1 km away

  • MILSTEAD, J. B.

    5,596 bbl last 12 months · 0.3 km away

  • ALFORD -A-

    2,543 bbl last 12 months · 0.3 km away

  • COX -A-

    781 bbl last 12 months · 0.3 km away

Drilling permits within 10 km

How to read this page

Questions owners ask

What is a decimal interest?

It is your share of the whole lease, written as a decimal. A 1/4 royalty on 5 net acres in a 1,280-acre unit is 1/4 × 5 ÷ 1,280 = 0.00097656. Your division order states yours.

How do I use this page to check a royalty check?

Take the “Oil sold” volume for the month the check covers and multiply it by your decimal. The answer should match the barrels on your statement. If it does not, upload the statement and we will show where the two differ.

Why is the newest month Jul 2026?

The Railroad Commission publishes production two to three months after the fact and revises recent months. We re-pull the latest three months on every update.

Does this page show what my check should be?

No. It shows what the state recorded. Prices, fees and taxes depend on your lease and on what your operator gets for the oil and gas. The estimator gives a ceiling to compare against.

Sources and method

Where these numbers come from

  • Production and disposition by month: Texas Railroad Commission Production Data Query, oil lease 06438, district 6E, reported through Jul 2026.
  • Wells: Texas Railroad Commission Wellbore Query.
  • Prices: U.S. Energy Information Administration, WTI Cushing spot and Henry Hub spot, monthly.
  • Page updated Sep 28, 2026.

We show the state’s numbers as filed. Where the state has no report for a month, we say so instead of guessing.