Big 4
Operator of record for 91 catalogued wells across 1 state. Every well below links to its full registry page.
At a glance
Big 4 is the operator of record for 91 catalogued U.S. oil & gas wells in 1 state. 15 (16%) are active, 10 (11%) plugged & abandoned. Its largest concentration is in Illinois, with 91 wells (100% of its portfolio).
Wells operated
91
Active
15
Plugged
10
Orphaned
0
Portfolio by state
| State | Wells |
|---|---|
| Illinois | 91 |
Well mix
- Oil wells
- 24
- Gas wells
- 0
- Shut-in
- 13
- Active share
- 16%
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Claim your operator profileWhere does Big 4 operate?
Big 4's catalogued wells are spread across 1 state: Illinois (91). Its 91 Illinois wells are 0.1% of the 174,478 catalogued in that state — its largest share of any state. Counts cover only states whose registries WellCensus has ingested with operator names; wells in Nebraska and Texas (location indexes) and in states without a registry ingest are not yet attributed to any operator.
How many of Big 4’s wells are active, plugged or orphaned?
16% of Big 4's catalogued wells are active, 12 percentage points below the national share of 29%. 11% are plugged & abandoned, against 47% nationally. 13 wells (14%) are shut-in — unplugged but idle. None of the wells filed under this name is flagged as orphaned.
What kinds of wells does Big 4 operate?
By product class, 24 (26%) are oil wells and 0 (0%) gas wells; nationally the shares are 43% and 17%. The deepest of its wells with a published depth is McOrr E. 1 in Lawrence, IL at 2,056 ft.
Notable wells operated by Big 4
| Well | API # / state ID | Status | Type | Location | Operator | Depth |
|---|---|---|---|---|---|---|
| McOrr E. 1 | 12-101-09404 | Plugged & abandoned | Other type | Lawrence, IL | Big 4 | 2,056 ft |
| Seed, J. 16 | 12-101-08710 | Other status | Other type | Lawrence, IL | Big 4 | 2,000 ft |
| Gillespie, Sherman 3 | 12-101-09280 | Active | Oil | Lawrence, IL | Big 4 | 1,920 ft |
| Lutz, Ellen 2 | 12-101-08960 | Active | Oil | Lawrence, IL | Big 4 | 1,919 ft |
| Gillespie, Laura 10 | 12-101-09257 | Other status | Other type | Lawrence, IL | Big 4 | 1,864 ft |
| Seed, Simon 5 | 12-101-07925 | Active | Oil | Lawrence, IL | Big 4 | 1,852 ft |
| Buchanan 16 | 12-101-08326 | Active | Oil | Lawrence, IL | Big 4 | 1,852 ft |
| Buchanan Hrs. 21 | 12-101-08328 | Other status | Other type | Lawrence, IL | Big 4 | 1,851 ft |
| Seed, Len 14 | 12-101-09049 | Plugged & abandoned | Oil | Lawrence, IL | Big 4 | 1,850 ft |
| Gillespie, L. 45 | 12-101-09271 | Other status | Other type | Lawrence, IL | Big 4 | 1,850 ft |
| Gillespie, Laura 13 | 12-101-09260 | Other status | Other type | Lawrence, IL | Big 4 | 1,850 ft |
| Seed, L. 19 | 12-101-09053 | Active | Oil | Lawrence, IL | Big 4 | 1,846 ft |
Deepest first where depth is published. See all 91 wells →
Frequently asked questions
How many wells does Big 4 operate?
Big 4 is the operator of record for 91 catalogued oil & gas wells, with the largest concentration in Illinois (91). Only wells in states WellCensus has ingested are counted.
How many of Big 4's wells are still active?
15 of Big 4's catalogued wells are active; 10 are plugged & abandoned.
In which states does Big 4 operate wells?
Big 4 is the operator of record for wells in Illinois (91).
Does Big 4 operate mostly oil or gas wells?
24 of Big 4's catalogued wells are oil wells and 0 are gas wells; the rest are injection, service or unclassified wells.
What is Big 4's deepest well?
Among wells with a published depth, McOrr E. 1 in Lawrence, IL is the deepest at 2,056 ft.
Where Big 4's wells are
About this data
Source: State oil & gas regulator registries (operator of record as filed, exact-normalized across states) plus the USGS United States Documented Orphaned Well Database (2026), as published October 10, 2026 — WellCensus refreshes it monthly. See the methodology for how records are matched, cleaned and scored.
Cite as: WellCensus, “Big 4 — well portfolio”, https://wellcensus.com/operators/big-4-66863 (data as of October 10, 2026).
Dataset updated . Operator portfolios are resolved from raw state registry filings (exact-normalized names; subsidiaries stay separate).