The largest oil and gas operators active in Ohio — ranked by total well count, with producing-well counts for each. Click any operator to see their full profile.
Buckhead Energy analysis of public oil and gas data. Refreshed daily. Data current as of 2026-10-04.
Quick answer: By wells operated, Ows Acquisition Co. LLC is the largest oil and gas operator in Ohio with 5,620 wells on record, followed by Diversified Production LLC (4,704) and Columbia Gas Transmission (2,763). Ranked from Buckhead Energy analysis of public oil and gas data (as of 2026-10-04). This is an operated-well-count ranking, not a revenue or market-cap ranking.
As of 2026-10-04, the largest operator by wells on record in Ohio is Ows Acquisition CO LLC with 5,620 wells on record, across the top 100 ranked operators, per Buckhead Energy analysis of public oil and gas data.
| # | Operator | Wells | Producing | Top Formation | Top County |
|---|---|---|---|---|---|
| 1 | Ows Acquisition CO LLC | 5,620 | 5,593 | Utica | Stark |
| 2 | Diversified Production LLC | 4,704 | 4,687 | Utica | Coshocton |
| 3 | Columbia Gas Transmission | 2,763 | 105 | Medina-Clinton-Tuscarora | Ashland |
| 4 | Eco Power Crypto LLC | 2,382 | 2,362 | Utica | Muskingum |
| 5 | Oxford Oil | 1,722 | 1,065 | Utica | Muskingum |
| 6 | Kenoil | 1,627 | 1,433 | Utica | Perry |
| 7 | Northwood Energy | 1,404 | 1,362 | Utica | Noble |
| 8 | Eog Ohio, LLC | 1,253 | 1,201 | Utica | Carroll |
| 9 | Petrox | 1,193 | 1,133 | Utica | Ashtabula |
| 10 | Ascent Resourcesmarcellus | 1,190 | 1,038 | Utica | Belmont |
| 11 | Pin Oak Energy Partners | 1,160 | 1,147 | Utica | Washington |
| 12 | Cgas Exploration | 1,127 | 358 | Utica | Ashtabula |
| 13 | Stonebridge Operating Company | 1,089 | 985 | Utica | Washington |
| 14 | J D Drilling Company | 1,018 | 627 | Utica | Meigs |
| 15 | Knox Energy | 959 | 851 | Utica | Licking |
| 16 | Everflow Eastern Ptns | 946 | 852 | Utica | Mahoning |
| 17 | The East Ohio Gas Company Dba Enbridge Gas Ohio | 901 | 76 | Utica | Stark |
| 18 | Belden And Blake CORP Dba Ward Lake Energy | 827 | 350 | Utica | Stark |
| 19 | Eric Petroleum | 760 | 752 | Utica | Mahoning |
| 20 | Mfc Drilling | 737 | 628 | Utica | Coshocton |
| 21 | Rhdk Oil & Gas LLC/Dba Red Hil | 716 | 681 | Utica | Tuscarawas |
| 22 | Enervest Operating | 712 | 521 | Utica | Stark |
| 23 | Quaker State Oil Ref | 660 | 368 | Utica | Hocking |
| 24 | Bocor Holdings LLC/Bocor Production | 654 | 556 | Utica | Geauga |
| 25 | Chesapeake Energy | 634 | 40 | Utica | Carroll |
| 26 | Sound Energy | 620 | 610 | Utica | Tuscarawas |
| 27 | Green Collar Energy, LLC | 604 | 601 | Utica | Coshocton |
| 28 | Harley Drilling & Producing | 596 | 519 | Utica | Ashland |
| 29 | Gulfport Appalachia | 581 | 508 | Utica | Belmont |
| 30 | Hetuck Oil And Gas Company | 521 | all but <3 | Utica | Summit |
| 31 | Kilbarger Investments | 509 | 461 | Medina-Clinton-Tuscarora | Hocking |
| 32 | Atwood Energy | 507 | 126 | Utica | Ashtabula |
| 33 | Bakerwell | 505 | 290 | Utica | Holmes |
| 34 | Yei | 502 | 84 | Utica | Stark |
| 35 | Chevron | 482 | 129 | Utica | Tuscarawas |
| 36 | Huffmanbowers | 478 | 462 | Medina-Clinton-Tuscarora | Gallia |
| 37 | R C Poling | 452 | 320 | Utica | Perry |
| 38 | Ngo Development | 444 | 337 | Utica | Coshocton |
| 39 | Buckeye Oil Producing Company | 438 | 374 | Utica | Holmes |
| 40 | Petro Quest | 438 | 425 | Utica | Athens |
| 41 | Heinrich Enterprises INC Dba Washington Operations | 436 | 420 | Utica | Washington |
| 42 | Inr Ohio LLC | 426 | 384 | Utica | Noble |
| 43 | Viking Resources | 420 | 101 | Utica | Lake |
| 44 | Enterprise Energy | 417 | 14 | Utica | Guernsey |
| 45 | Cameron Production | 415 | 387 | Utica | Muskingum |
| 46 | Artex Oil Company | 415 | 323 | Utica | Tuscarawas |
| 47 | Dorfman Production Company | 408 | 399 | Utica | Mahoning |
| 48 | David R Hill | 406 | 332 | Utica | Guernsey |
| 49 | Hopewell Oil & Gas Development | 402 | 171 | Utica | Muskingum |
| 50 | Graymarr LLC | 400 | 392 | Utica | Monroe |
| 51 | Jerry Moore | 400 | 89 | Utica | Coshocton |
| 52 | Franklin Gas & Oil | 394 | 295 | Utica | Wayne |
| 53 | Lake Region Oil | 385 | 346 | Utica | Holmes |
| 54 | Range Operating Company | 384 | 147 | Utica | Geauga |
| 55 | Amtek Oil | 361 | 355 | Utica | Washington |
| 56 | Deep Resources | 354 | 312 | Utica | Ashland |
| 57 | James R Smail | 353 | 80 | Utica | Wayne |
| 58 | Equity Oil & Gas Funds In | 352 | 311 | Utica | Portage |
| 59 | J Well Service | 349 | 346 | Utica | Trumbull |
| 60 | Zilkha Energy | 349 | 41 | Utica | Guernsey |
| 61 | Stevens Oil & Gas | 343 | 336 | Utica | Monroe |
| 62 | Maram Energy Company | 341 | 293 | Utica | Knox |
| 63 | Benatty | 341 | 72 | Utica | Morgan |
| 64 | Range Resources | 341 | 83 | Utica | Stark |
| 65 | Gr Contracting | 341 | 316 | Utica | Monroe |
| 66 | Ohio Valley Energy Systems CORP | 322 | 295 | Utica | Mahoning |
| 67 | Exco North Coast Energy | 322 | 193 | Utica | Muskingum |
| 68 | King Drilling Company | 321 | 249 | Utica | Medina |
| 69 | Noble Energy | 320 | 103 | Utica | Portage |
| 70 | B & J Drilling Company | 315 | 235 | Utica | Knox |
| 71 | Eltringham Producing LLC | 309 | 306 | Utica | Muskingum |
| 72 | Appalachian Exploration | 301 | 26 | Utica | Medina |
| 73 | D & D Energy Company | 291 | all but <3 | Utica | Stark |
| 74 | Bakerwell Serv Rigs | 289 | 3 | Utica | Cuyahoga |
| 75 | Busted Knuckle Oil & Gas LLC | 286 | 286 | Utica | Ashtabula |
| 76 | Eco Production | 285 | all but <3 | Utica | Carroll |
| 77 | Altheirs Oil | 285 | 148 | Utica | Perry |
| 78 | Mutual Oil & Gas Company | 284 | 77 | Utica | Tuscarawas |
| 79 | Expand Operating LLC | 283 | 258 | Utica | Monroe |
| 80 | Clarence K Tussel Jr | 275 | 275 | Utica | Ashtabula |
| 81 | Rice Drilling B | 275 | 210 | Utica | Belmont |
| 82 | Mainspring | 272 | all but <3 | Utica | Tuscarawas |
| 83 | G & O Resources | 271 | 267 | Utica | Medina |
| 84 | Ms Producing | 266 | 266 | Utica | Wayne |
| 85 | Genesis Resources | 265 | 260 | Utica | Monroe |
| 86 | Mb Operating | 263 | 141 | Utica | Stark |
| 87 | Valley Petroleum Management | 255 | 233 | Utica | Knox |
| 88 | Edco Drilling & Producing | 254 | 46 | Utica | Coshocton |
| 89 | Brick Service And Sales INC | 250 | 250 | Utica | Muskingum |
| 90 | Summit Petroleum | 246 | 206 | Utica | Summit |
| 91 | Hopco Resources | 245 | 158 | Utica | Coshocton |
| 92 | Mason Drilling | 244 | 182 | Utica | Holmes |
| 93 | Jadoil INC D Vernau | 243 | 40 | Utica | Coshocton |
| 94 | Fawn Resources | 238 | 124 | Utica | Ashland |
| 95 | Atlas Energy Corporation Del | 236 | 19 | Utica | Trumbull |
| 96 | Moran Ronald F | 233 | 159 | Utica | Licking |
| 97 | Derrick Petroleum | 227 | 189 | Utica | Coshocton |
| 98 | 4m Enterprise | 227 | 224 | Medina-Clinton-Tuscarora | Lawrence |
| 99 | Eos Energy LLC | 226 | 221 | Utica | Morrow |
| 100 | Green Gas Company | 224 | 156 | Utica | Noble |
Source: Buckhead Energy analysis of public oil and gas data.
Ranking: Operators ranked by total well count under their current operator-of-record. Producing-well count is wells with a first-production date on file. Drilling activity (permits, spuds, DUCs) is published only as state and county counts, never attributed to an operator.
Why it matters: Knowing who operates the most wells in Ohio helps mineral owners understand who they're dealing with at the lease level.
Refresh cadence: Daily. Data current as of 2026-10-04.
By wells operated, Ows Acquisition Co. LLC is the largest oil and gas operator in Ohio, with 5,620 wells on record per Buckhead Energy analysis of public oil and gas data. Note that "biggest" by revenue or market capitalization can rank differently — this measures operated well count.
The top 10 operators by operated well count are: Ows Acquisition Co. LLC, Diversified Production LLC, Columbia Gas Transmission, Eco Power Crypto LLC, Oxford Oil, Kenoil, Northwood Energy, EOG Ohio, LLC, Petrox, Ascent Resourcesmarcellus. The full top-100 ranking with well and producing-well counts is in the leaderboard below.
Ows Acquisition Co. LLC operates the most wells in Ohio at 5,620, per Buckhead Energy analysis of public oil and gas data.
This leaderboard ranks the top 100 operators active in Ohio by total well count. Many more file with the regulator; these are the largest by operated wells.
By wells operated — the count of wells under each company's current operator-of-record designation in the public oil and gas data Buckhead Energy analyzes. It is not a revenue, production-volume, or market-capitalization ranking.
Whether your operator is on this list or not, your Ohio mineral interest may be more valuable than you think. Get a free, no-obligation written offer.
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State: Ohio
Operators ranked: 100
Total wells: 63,416
Last refresh: 2026-10-04
