639 wells across 218 recorded operators, with 4 drilling permits filed in the 24-month window at summary refresh.
Buckhead Energy analysis of public oil and gas data. Formation summary date: 2026-11-06.
Quick answer: The Big Horn Basin formation in Montana has 639 wells on record across 218 recorded operators, with 4 drilling permits filed in the 24-month window at source refresh. Its operators with the most wells on record are Brothers Petroleum LLC, Big Sky Energy, Amoco Production Company, Montana Power Company and Northwestern. Source: Buckhead Energy analysis of public oil and gas data. Formation summary date: 2026-11-06.
The operators with the most well counts targeting the Big Horn Basin formation in Montana:
| # | Operator | Wells in Big Horn Basin |
|---|---|---|
| 1 | Brothers Petroleum LLC | 89 |
| 2 | Big Sky Energy | 38 |
| 3 | Amoco Production Company | 37 |
| 4 | Montana Power Company | 30 |
| 5 | Northwestern | 22 |
| 6 | Howell Petroleum | 21 |
| 7 | Cruse Tom | 9 |
| 8 | Struthers Oil & Gas | 9 |
| 9 | Murphy Nevel E | 8 |
| 10 | Ohio Oil Company | 8 |
The Montana counties with the most Big Horn Basin activity:
Carbon, Yellowstone
The Big Horn Basin is not among the Montana formations tracked separately in the yearly permit mix, so only statewide permit counts are shown.
| Year | State permits | This formation | Share | Median lateral |
|---|---|---|---|---|
| 2026 | 208 | — | — | — |
| 2025 | 54 | — | — | — |
| 2024 | 72 | — | — | — |
| 2023 | 61 | — | — | — |
| 2022 | 65 | — | — | — |
| 2021 | 50 | — | — | — |
| 2020 | 22 | — | — | — |
| 2019 | 75 | — | — | — |
Share of each year’s Montana drilling permits by target formation, for the formations with the most permits.
| Year | Williston Basin | Bakken | Sweetgrass Arch | Powder River Basin | Central Montana Uplift | Heath Fm |
|---|---|---|---|---|---|---|
| 2026 | 95.2% | — | 1.4% | — | — | — |
| 2025 | 85.2% | 7.4% | 7.4% | — | — | — |
| 2024 | 90.3% | — | 5.6% | — | 4.2% | — |
| 2023 | 75.4% | 4.9% | 9.8% | — | 4.9% | — |
| 2022 | 63.1% | 9.2% | 13.8% | — | 9.2% | — |
| 2021 | 42% | 38% | 12% | — | 8% | — |
| 2020 | 54.5% | — | — | — | — | — |
| 2019 | 28% | 16% | 8% | 34.7% | 4% | 5.3% |
Buckhead Energy computes every figure on this page from grouped records in public oil and gas data. The page shows counts, sums, percentiles and indexes only; it does not list individual wells, leases or permits.
Counts under 3 wells and percentiles under 5 wells are withheld; totals are floors.
Share is the formation’s permits as a percent of the state’s permits that year. Median lateral length is published only when at least 5 permits stand behind it.
Last computed: 2026-11-06. These figures are informational only and are not a valuation of any mineral or royalty interest.
The Big Horn Basin is a formation/play group recorded in Montana, with 639 wells on file across 218 distinct operators of record. Operators have filed 4 drilling permits targeting the Big Horn Basin in the 24-month window at summary refresh. These are stored records, not a live measure of drilling.
Recorded formation activity provides regional context. It does not establish ownership, future production, royalty payments or a value for an individual tract. Consult qualified professionals about your specific interest.
639 wells target the Big Horn Basin in Montana, worked by 218 recorded operators, per Buckhead Energy analysis of public oil and gas data. Formation summary date: 2026-11-06.
The Big Horn Basin operators with the most wells on record in Montana are Brothers Petroleum LLC, Big Sky Energy, Amoco Production Company, Montana Power Company and Northwestern. The full ranking is in the table on this page. Formation summary date: 2026-11-06.
Operators filed 4 drilling permits targeting the Big Horn Basin in the 24-month window at source refresh, per Buckhead Energy analysis of public oil and gas data. Formation summary date: 2026-11-06.
Operators filed 4 new drilling permits targeting the Big Horn Basin in Montana in the 24-month window at source refresh. New permits and spuds record reported activity stages; they do not establish ongoing drilling, per Buckhead Energy analysis of public oil and gas data. Formation summary date: 2026-11-06.
Big Horn Basin activity in Montana includes 639 wells on record and 218 recorded operators, with 4 drilling permits filed in the 24-month window at source refresh — from Buckhead Energy analysis of public oil and gas data. Formation summary date: 2026-11-06.
The primary counties recorded for Big Horn Basin in Montana are Carbon, Yellowstone. Formation summary date: 2026-11-06.
Value depends on your net mineral acres or royalty decimal, the operator, the remaining drilling locations, and current oil and gas prices. This page is informational only, not a valuation. Formation summary date: 2026-11-06.
Get a free written offer based on your specific tract, operator, and the current Big Horn Basin activity in your area.
Get Your Free Written OfferFormation: Big Horn Basin
State: Montana
Total wells: 639
Recorded operators: 218
Permits 24mo: 4
Summary date: 2026-11-06
