Texas is astate in theSouth Central region of the United States. The region's second-quarter 2018gross state product was 8.6% of the GDP of the country at $1.755 trillion, with significant growth in mining, quarrying, and oil and gas extraction.^[1] The state ranked third onForbes list of Best States For Business in 2018, noting strong growth, employment and income and a primary target for corporate relocations over the last six years.^[2]

This list shows firms in theFortune 500, which ranks firms by total revenues reported before January 31, 2018.^[3] Only the top five firms (if available) are included as a sample.

Rank	Image	Name	Revenues (USD $M)	Employees	Notes
2		ExxonMobil	244,363	71,200	Multinational oil and gas company and largest of theBig Oil entities. The firm is headquartered inSpring, Texas north of Houston. Subsidiaries includeExxon,Mobil, andEsso.
9		AT&T	160,546	254,000	Multinational telecommunications holding company which includes many components of the formerBell System. Headquartered inDallas, the company includesCricket Wireless andDirecTV.
28		Phillips 66	91,568	14,600	Global oil and gas entity formed when it spun off fromConocoPhillips in 2012. The firm is headquartered in theWestchase district ofHouston.
31		Valero Energy	88,407	10,015	International oil and gas refiner, marketer and distribution company. The company is headquartered inSan Antonio and divested itself of retail operations in 2013 through the formation ofCST Brands.
35		Dell Technologies	78,660	145,000	Multinational technology firm based inRound Rock, nearAustin in central Texas. The company's historical focus was personal computers, but now offers a range of technology products and services.

This list includes notablecompanies with primaryheadquarters located in the state. The industry and sector follow theIndustry Classification Benchmark taxonomy. Organizations which have ceased operations are included and noted as defunct.

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  TheHouston Ship Channel
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  Chevron offices in Houston
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  Comerica Bank Tower in downtown Dallas
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  TheFrost Bank Tower inAustin, Texas

• List of companies in Dallas
• List of companies in the Dallas–Fort Worth metroplex
• List of companies in Houston

• Companies based in Texas
• Lists of companies of the United States by state or territory
• Lists of companies based in Texas

• Articles with short description
• Short description is different from Wikidata
• Use mdy dates from April 2025