United States

Top 310 largest US Companies in the Energy sector by Market Cap

This is the list of the largest public listed companies in the Energy sector from the United States by market capitalization with links to their reference stock and industry.

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Top Energy Companies from the United States as of Jan. 01, 2026

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Rank Company Market Cap (USD) Country Sector Industry
271 Cygnus Oil & Gas Corp United States US Energy US Oil & Gas E&P
272 Arkanova Energy Corp United States US Energy US Oil & Gas E&P
273 ZaZa Energy Corp United States US Energy US Oil & Gas E&P
274 XCana Petroleum Corp United States US Energy US Oil & Gas E&P
275 Southern Realty Co. United States US Energy US Oil & Gas E&P
276 Axis Petroleum Co. United States US Energy US Oil & Gas E&P
277 AXP Energy Ltd United States US Energy US Oil & Gas E&P
278 Starlight Energy Corp United States US Energy US Oil & Gas E&P
279 New Source Energy Partners LP United States US Energy US Oil & Gas E&P
280 AER Energy Resources, Inc. United States US Energy US Oil & Gas E&P
281 American Energy Development Corp United States US Energy US Oil & Gas E&P
282 Arete Industries, Inc. United States US Energy US Oil & Gas E&P
283 Kodiak Gas Services, Inc. United States US Energy US Oil & Gas Equipment & Services
284 Petrotech Oil & Gas, Inc. United States US Energy US Oil & Gas Equipment & Services
285 ProFrac Holding Corp. United States US Energy US Oil & Gas Equipment & Services
286 Deltron, Inc. United States US Energy US Oil & Gas Equipment & Services
287 RigNet, Inc. United States US Energy US Oil & Gas Equipment & Services
288 Seacor Holdings Inc. United States US Energy US Oil & Gas Equipment & Services
289 Diamond Offshore Drilling Inc United States US Energy US Oil & Gas Drilling
290 Cal Dive International, Inc. United States US Energy US Oil & Gas Equipment & Services
291 XR Energy, Inc. United States US Energy US Oil & Gas Equipment & Services
292 Terra Energy & Resource Technologies, Inc. United States US Energy US Oil & Gas Equipment & Services
293 Expro Group Holdings N.V. Commo United States US Energy US Oil & Gas Equipment & Services
294 Pacific Energy & Mining Co. United States US Energy US Oil & Gas Integrated
295 Savoy Energy Corp United States US Energy US Oil & Gas Integrated
296 Ojai Oil Co. United States US Energy US Oil & Gas Integrated
297 Altus Midstream Company United States US Energy US Oil & Gas Midstream
298 Diamond S Shipping Inc. United States US Energy US Oil & Gas Midstream
299 El Paso Electric Co United States US Energy US Oil & Gas Midstream
300 Kinetik Holdings Inc. United States US Energy US Oil & Gas Midstream

Top Energy Companies from the United States as of Jan. 01, 2026

271. Cygnus Oil & Gas Corp

Company Profile: Cygnus Oil & Gas Corp
Country: United States
Sector: US Energy
Industry: US Oil & Gas E&P

272. Arkanova Energy Corp

Company Profile: Arkanova Energy Corp
Country: United States
Sector: US Energy
Industry: US Oil & Gas E&P

273. ZaZa Energy Corp

Company Profile: ZaZa Energy Corp
Country: United States
Sector: US Energy
Industry: US Oil & Gas E&P

274. XCana Petroleum Corp

Company Profile: XCana Petroleum Corp
Country: United States
Sector: US Energy
Industry: US Oil & Gas E&P

275. Southern Realty Co.

Company Profile: Southern Realty Co.
Country: United States
Sector: US Energy
Industry: US Oil & Gas E&P

276. Axis Petroleum Co.

Company Profile: Axis Petroleum Co.
Country: United States
Sector: US Energy
Industry: US Oil & Gas E&P

277. AXP Energy Ltd

Company Profile: AXP Energy Ltd
Country: United States
Sector: US Energy
Industry: US Oil & Gas E&P

278. Starlight Energy Corp

Company Profile: Starlight Energy Corp
Country: United States
Sector: US Energy
Industry: US Oil & Gas E&P

279. New Source Energy Partners LP

Company Profile: New Source Energy Partners LP
Country: United States
Sector: US Energy
Industry: US Oil & Gas E&P

280. AER Energy Resources, Inc.

Company Profile: AER Energy Resources, Inc.
Country: United States
Sector: US Energy
Industry: US Oil & Gas E&P

281. American Energy Development Corp

Company Profile: American Energy Development Corp
Country: United States
Sector: US Energy
Industry: US Oil & Gas E&P

282. Arete Industries, Inc.

Company Profile: Arete Industries, Inc.
Country: United States
Sector: US Energy
Industry: US Oil & Gas E&P

283. Kodiak Gas Services, Inc.

Company Profile: Kodiak Gas Services, Inc.
Country: United States
Sector: US Energy
Industry: US Oil & Gas Equipment & Services

284. Petrotech Oil & Gas, Inc.

Company Profile: Petrotech Oil & Gas, Inc.
Country: United States
Sector: US Energy
Industry: US Oil & Gas Equipment & Services

285. ProFrac Holding Corp.

Company Profile: ProFrac Holding Corp.
Country: United States
Sector: US Energy
Industry: US Oil & Gas Equipment & Services

286. Deltron, Inc.

Company Profile: Deltron, Inc.
Country: United States
Sector: US Energy
Industry: US Oil & Gas Equipment & Services

287. RigNet, Inc.

Company Profile: RigNet, Inc.
Country: United States
Sector: US Energy
Industry: US Oil & Gas Equipment & Services

288. Seacor Holdings Inc.

Company Profile: Seacor Holdings Inc.
Country: United States
Sector: US Energy
Industry: US Oil & Gas Equipment & Services

289. Diamond Offshore Drilling Inc

Company Profile: Diamond Offshore Drilling Inc
Country: United States
Sector: US Energy
Industry: US Oil & Gas Drilling

290. Cal Dive International, Inc.

Company Profile: Cal Dive International, Inc.
Country: United States
Sector: US Energy
Industry: US Oil & Gas Equipment & Services

291. XR Energy, Inc.

Company Profile: XR Energy, Inc.
Country: United States
Sector: US Energy
Industry: US Oil & Gas Equipment & Services

292. Terra Energy & Resource Technologies, Inc.

Company Profile: Terra Energy & Resource Technologies, Inc.
Country: United States
Sector: US Energy
Industry: US Oil & Gas Equipment & Services

293. Expro Group Holdings N.V. Commo

Company Profile: Expro Group Holdings N.V. Commo
Country: United States
Sector: US Energy
Industry: US Oil & Gas Equipment & Services

294. Pacific Energy & Mining Co.

Company Profile: Pacific Energy & Mining Co.
Country: United States
Sector: US Energy
Industry: US Oil & Gas Integrated

295. Savoy Energy Corp

Company Profile: Savoy Energy Corp
Country: United States
Sector: US Energy
Industry: US Oil & Gas Integrated

296. Ojai Oil Co.

Company Profile: Ojai Oil Co.
Country: United States
Sector: US Energy
Industry: US Oil & Gas Integrated

297. Altus Midstream Company

Company Profile: Altus Midstream Company
Country: United States
Sector: US Energy
Industry: US Oil & Gas Midstream

298. Diamond S Shipping Inc.

Company Profile: Diamond S Shipping Inc.
Country: United States
Sector: US Energy
Industry: US Oil & Gas Midstream

299. El Paso Electric Co

Company Profile: El Paso Electric Co
Country: United States
Sector: US Energy
Industry: US Oil & Gas Midstream

300. Kinetik Holdings Inc.

Company Profile: Kinetik Holdings Inc.
Country: United States
Sector: US Energy
Industry: US Oil & Gas Midstream

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