Two views of Houston's economy: the registered/startup layer and the street-level business fabric, with the largest tracked employers.
Houston is still energy-shaped, not energy-only: oil and energy lead with 2434 tracked companies, while technology counts 2035 and health care 2044 in the broader sector blend. Construction, finance, real estate and software add breadth.
| Industry | Companies |
|---|---|
| Oil & Energy | 2434 |
| Real Estate | 973 |
| Information Technology and Services | 933 |
| Marketing and Advertising | 752 |
| Financial Services | 752 |
| Computer Software | 685 |
| Construction | 653 |
| Hospital & Health Care | 594 |
| Medical Practice | 473 |
| Management Consulting | 423 |
| Health, Wellness and Fitness | 418 |
| Staffing and Recruiting | 365 |
| Accounting | 348 |
| Transportation/trucking/railroad | 344 |
| Automotive | 341 |
| Insurance | 334 |
| Internet | 302 |
| Design | 297 |
| Law Practice | 272 |
| Mechanical or Industrial Engineering | 271 |
| Non-profit Organization Management | 264 |
| Architecture & Planning | 252 |
| Retail | 251 |
| Electrical/electronic Manufacturing | 249 |
| Food & Beverages | 247 |
| Sector | Places | Rating |
|---|---|---|
| Software company | 18 | 4.79 |
| Unclassified | 8 | 3.7 |
| Translator | 7 | 4.42 |
| Website designer | 6 | 4.87 |
| Computer support and services | 6 | 4.92 |
| Corporate office | 6 | 4.44 |
| Computer consultant | 5 | 5.0 |
| Freight forwarding service | 5 | 3.94 |
| Marketing agency | 4 | 4.6 |
| Personal injury attorney | 4 | 4.7 |
| Advertising agency | 4 | 4.17 |
| Logistics service | 4 | 2.6 |
| Consultant | 4 | — |
| Internet marketing service | 4 | 4.85 |
| Business management consultant | 3 | 5.0 |
| Company | Industry | Employees | Founded |
|---|---|---|---|
| SLB | oil & energy | 100,000 | 1987 |
| Compaq | computer hardware | 78,200 | 1982 |
| Hewlett Packard Enterprise | information technology and services | 62,000 | 2015 |
| Baker Hughes | oil & energy | 58,000 | 1987 |
| Quanta Services | construction | 52,500 | 1997 |
| Waste Management | environmental services | 48,000 | 1968 |
| CEMEX | building materials | 43,853 | 1906 |
| McDermott International | oil & energy | 42,600 | 1923 |
| National Oilwell Varco | oil & energy | 33,676 | 1841 |
| KBR | construction | 28,000 | 1919 |
| Men's Wearhouse | retail | 26,100 | 1973 |
| Cameron International Corp | oil & energy | 24,000 | 1833 |
| Memorial Hermann | hospital & health care | 21,093 | 1907 |
| Cameron a Schlumberger company | energy/oil | 20,126 | |
| Houston Methodist | hospital & health care | 19,848 | 1919 |
| education management | 19,287 | ||
| Oliver Equipment | mechanical or industrial engineering | 18,000 | 1975 |
| Service Corporation International | individual & family services | 17,612 | 1962 |
| Fmc Technologies | oil & energy | 16,500 | 2001 |
| The Oilfield Marketplace | oil & energy | 16,378 | 2018 |
| Group1 Automotive | automotive | 16,011 | 1997 |
| Westlake Chemical | chemicals | 15,520 | 1986 |
| Nimble Storage | information technology and services | 15,156 | 2007 |
| HCA Gulf Coast Division | hospital & health care | 15,000 | 2012 |
| Comfort Systems USA | construction | 14,100 | 1997 |
company registry (startup-skewed) + mapped business places
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