> Enrich.chat gives AI agents verified work emails and mobiles. To use it from an agent, read https://enrich.chat/agents.md . This is the Markdown version of https://enrich.chat/companies-in/san-antonio-tx/oil-and-gas/ # Oil and Gas Companies in San Antonio, TX The bigger oil and gas companies headquartered in San Antonio, TX, with what they do, their sizes and how to reach their people. By Enrich.chat Editorial. Updated October 22, 2026. **Short answer:** Among the oil and gas companies counted in San Antonio, TX, the biggest by headcount range include Valero, Nustar Energy and Lewis Energy Group. They are mostly very small: 54% have 50 or fewer employees. ## Which oil and gas companies are in San Antonio? Among the companies whose public profile lists Oil and Gas as their industry and San Antonio, TX as their headquarters, the biggest by headcount range include Valero, Nustar Energy, Lewis Energy Group, San Antonio Pipeliners Association and Clearwell Dynamics. Names link to a company profile where we have one. | Company | Employees | | --- | --- | | Valero | 10,001+ | | Nustar Energy | 1,001 to 5,000 | | Lewis Energy Group | 1,001 to 5,000 | | San Antonio Pipeliners Association | 501 to 1,000 | | Clearwell Dynamics | 501 to 1,000 | | Howard Energy Partners | 201 to 500 | | Epic Midstream | 201 to 500 | | Meritum Energy Holdings | 201 to 500 | | Pico Propane And Fuels | 201 to 500 | | Streamline Innovations | 51 to 200 | | Blackbrush Oil & Gas | 51 to 200 | | Wellaware | 51 to 200 | | Petroledger Accounting & Land | 51 to 200 | | Petrostar Services | 51 to 200 | | Stakeholder Midstream | 51 to 200 | | Ironwood Midstream Energy Partners | 51 to 200 | | Pin Oak Group | 51 to 200 | | E.J. Ward | 51 to 200 | | Allegiance Refining | 51 to 200 | | Safzone Field Services | 51 to 200 | | Trust Petroleum | 51 to 200 | | Completion Equipment Rental | 51 to 200 | | Gti Statia | 51 to 200 | | Imperial Steel | 51 to 200 | | Bruington Engineering | 51 to 200 | The table shows the 25 biggest by headcount range, with ties broken by audience size. The charts and percentages below cover every company counted for this page, not just these 25, and companies with fewer than 11 employees are not counted. Headquarters is the location on each company's public profile. ## What do oil and gas companies in San Antonio do? Oil and Gas is a broad label. The most common NAICS codes among them are 213112 (21%), 211120 (7%) and 213111 (7%). **Figure: What oil and gas companies in San Antonio do.** Bars for the share of counted oil and gas companies with each code: 213112 21%, 211120 7%, 213111 7%, 324110 7%, 423830 7%, 424990 7%, 457120 7%. *Share of counted oil and gas companies in San Antonio by their NAICS code.* [NAICS 211120](https://enrich.chat/naics/211120/)[NAICS 213111](https://enrich.chat/naics/213111/) ## How big are they? 54% of the oil and gas companies counted in San Antonio have 50 or fewer employees, and the middle one is in the 11 to 50 range. Companies with fewer than 11 employees are not counted. **Figure: Size of oil and gas companies in San Antonio.** Seven columns for the share of counted oil and gas companies in San Antonio in each employee range: 11 to 50 54%, 51 to 200 33%, 201 to 500 6%, 501 to 1,000 3%, 1,001 to 5,000 3%, 5,001 to 10,000 0%, 10,001+ 1%. *Share of counted oil and gas companies in San Antonio in each employee range.* ## How oil and gas companies compare - 54% of oil and gas companies in San Antonio have 50 or fewer employees, against 71% across other cities on this site. ## How do you reach the people at oil and gas companies in San Antonio? The people to talk to are usually operations, procurement and finance leaders. Build the list in three prompts to your AI agent. ### 1. Count them (free) Counting who matches never uses credits. ```text Use www.enrich.chat to count the oil and gas companies in San Antonio, TX ``` ### 2. Find the people (5 credits per person) Name the roles you sell to. Each person returned is 5 credits, and name, title and company are included. ```text Use www.enrich.chat to find the operations, procurement and finance leaders at oil and gas companies in San Antonio, TX, with their titles ``` ### 3. Get their work emails (10 credits each) An email is 10 credits only when one is found. Every email comes with a status: verified, catch-all or unknown. ```text Use www.enrich.chat to find the work emails for these people and tell me which ones are verified ``` ## More to explore Other industries in San Antonio: [Construction Companies](https://enrich.chat/companies-in/san-antonio-tx/construction/)[Hospitals and Health Care Organizations](https://enrich.chat/companies-in/san-antonio-tx/hospitals-and-health-care/)[Real Estate Companies](https://enrich.chat/companies-in/san-antonio-tx/real-estate/)[IT Services Companies](https://enrich.chat/companies-in/san-antonio-tx/it-services-and-it-consulting/)[Advertising Agencies](https://enrich.chat/companies-in/san-antonio-tx/advertising-services/)[Insurance Companies](https://enrich.chat/companies-in/san-antonio-tx/insurance/)[Software Companies](https://enrich.chat/companies-in/san-antonio-tx/software-development/)[Financial Services Companies](https://enrich.chat/companies-in/san-antonio-tx/financial-services/)[Nonprofit Organizations](https://enrich.chat/companies-in/san-antonio-tx/non-profit-organizations/)[Consulting Firms](https://enrich.chat/companies-in/san-antonio-tx/business-consulting-and-services/)[Facilities Services Companies](https://enrich.chat/companies-in/san-antonio-tx/facilities-services/)[Motor Vehicle Manufacturers](https://enrich.chat/companies-in/san-antonio-tx/motor-vehicle-manufacturing/)[Staffing and Recruiting Firms](https://enrich.chat/companies-in/san-antonio-tx/staffing-and-recruiting/)[Education Organizations](https://enrich.chat/companies-in/san-antonio-tx/education-administration-programs/)[Telecommunications Companies](https://enrich.chat/companies-in/san-antonio-tx/telecommunications/)[All of San Antonio](https://enrich.chat/companies-in/san-antonio-tx/) Oil and Gas Companies in other cities: [Houston, TX](https://enrich.chat/companies-in/houston-tx/oil-and-gas/)[Dallas, TX](https://enrich.chat/companies-in/dallas-tx/oil-and-gas/)[Oklahoma City, OK](https://enrich.chat/companies-in/oklahoma-city-ok/oil-and-gas/)[Tulsa, OK](https://enrich.chat/companies-in/tulsa-ok/oil-and-gas/)[Denver, CO](https://enrich.chat/companies-in/denver-co/oil-and-gas/)[Fort Worth, TX](https://enrich.chat/companies-in/fort-worth-tx/oil-and-gas/) ## Frequently asked questions ### Which are the biggest oil and gas companies in San Antonio? Among those counted, they include Valero, Nustar Energy, Lewis Energy Group, San Antonio Pipeliners Association and Clearwell Dynamics, ranked by headcount range. ### How big are oil and gas companies in San Antonio? 54% of those counted have 50 or fewer employees, and the middle one is in the 11 to 50 range. Companies with fewer than 11 employees are not counted. ### Which companies count as oil and gas? Companies whose public profile lists Oil and Gas as their industry and whose headquarters are in San Antonio, TX. ## Try this prompt Find the people at oil and gas companies in San Antonio ```text Use www.enrich.chat to find the operations, procurement and finance leaders at oil and gas companies in San Antonio, TX, with titles and verified work emails ``` ## Related - [Companies using a technology](https://enrich.chat/companies-using/) - [Construction Companies in San Antonio](https://enrich.chat/companies-in/san-antonio-tx/construction/) - [Hospitals and Health Care Organizations in San Antonio](https://enrich.chat/companies-in/san-antonio-tx/hospitals-and-health-care/) - [Real Estate Companies in San Antonio](https://enrich.chat/companies-in/san-antonio-tx/real-estate/) - [IT Services Companies in San Antonio](https://enrich.chat/companies-in/san-antonio-tx/it-services-and-it-consulting/) - [Oil and Gas Companies in Houston](https://enrich.chat/companies-in/houston-tx/oil-and-gas/) - [Oil and Gas Companies in Dallas](https://enrich.chat/companies-in/dallas-tx/oil-and-gas/) - [Oil and Gas Companies in Oklahoma City](https://enrich.chat/companies-in/oklahoma-city-ok/oil-and-gas/) - [Oil and Gas Companies in Tulsa](https://enrich.chat/companies-in/tulsa-ok/oil-and-gas/) - [Tech stack lookup](https://enrich.chat/tools/tech-stack-lookup/)