Best Energy Companies in San Antonio, United States
The 76 best Energy companies in San Antonio, United States in 2026, ranked by funding and momentum. Funding, investors, founders, valuation, tech stack and live signals. Top: Howard Energy Partners.
Our analysis of 171 Energy companies
$71.4b in tracked funding; 82% of the stack-profiled cohort runs cloud-native; funding activity peaked in 2025.
Ranked: Best Energy companies in San Antonio
| # | Company | Last round | Disclosed funding | Employees | Founded | Founder | Tech stack | Recent signals |
|---|---|---|---|---|---|---|---|---|
| 1 | Abraxas Petroleum Exploration and production company | — | — | 18 | 1977 | Robert Watson CEO & President | — | — |
| 2 | ageron energy Ageron Energy is an oil and gas exploration and production company that provides generating and leases… | — | — | 14 | 1994 | — | — | — |
| 3 | Alamo Oilfield Services Alamo Oilfield Services, LLC was established in 2013 specializing in anchor tie-down on the completion side… | — | — | 21 | 2013 | — | — | — |
| 4 | Amcorr Products & Services Provider of oil & gas products and services | — | — | — | 2000 | Edwin Welles CEO | — | — |
| 5 | Andeavor Logistics Midstream logistics service provider | — | — | 17,000 | 2010 | Gary Heminger Chairman & CEO | — | — |
| 6 | Big Sun Solar Developer of utility scale solar energy power projects | — | — | 14 | 2015 | — | WebflowApple iCloud MailGoogle Workspace+18 | — |
| 7 | CandS Enterprise C&S Electrical is San Antonio’s leading provider of electrical infrastructure technologies in Southern… | — | — | 44 | 1994 | — | Cart FunctionalitySquarespace CommerceSquarespace+21 | — |
| 8 | CAPITAL - A Division of HJD Capital Electric Construction | Electrical | 24-Hour Service HJD Capital Electric, Inc. | — | — | 77 | 1994 | — | WordPressApple iCloud MailMicrosoft 365+18 | — |
Top 12 Energy companies in San Antonio
#1
Series B · San Antonio, Texas · founded 2015 · 26 employees$15.2Mraised▾
Distributor of propane, fuel, lubricants, and other NGL assets. This entity operates a network of distribution assets and provides wholesale fuel solutions leveraging supplier relationships, pipeline access, and rail terminal capabilities. It offers services to businesses of all sizes, emphasizing value, service, safety, and support. The company's supply network and fuel professionals enable it to meet diverse customer needs.
#2
Acquired · San Antonio, Texas · founded 2011 · 218 employees$595Mraised▾
Diversified oil and gas midstream firm
- Dec 2021Conventional Debt$1B
- 2017Series B—
- Aug 2016Series B$500M
- Dec 2013Series A—
#3
Series D · San Antonio, Texas · founded 2022 · 7 employees$200Mraised▾
Provider of infrastructure development services for domestic oil and gas industry
#4
Series D · San Antonio, Texas · founded 2015 · 35 employees$400Mraised▾
Provider of crude oil & natural gas pipeline systems and services
- Nov 2019Series D$400M
#5
Late Stage · San Antonio, Texas · founded 2011 · 33 employees$400Mraised▾
Exploration and production company focused on responsible oil and gas development. The company is dedicated to creating lasting value through operational execution, capital discipline, and financial returns. With expertise in unconventional oil and gas development, the team focuses on responsible development, technical excellence, and operational efficiency. The company is committed to excellence and integrity, prioritizing safety, environmental responsibility, and strong relationships with the communities where it operates. The company actively pursues opportunities to deploy capital and create value. The company is backed by financial partners and is focused on delivering strong results across multiple producing basins.
- 2011PE$400M
#6
Acquired · San Antonio, Texas · founded 2013 · 13 employees$350Mraised▾
Manager of oil and gas exploration subsidiaries. This entity oversees the operations of multiple subsidiaries involved in the exploration and extraction of oil and gas resources. It provides management and support services to these subsidiaries, facilitating their activities across the entire value chain. The focus is on efficient and effective management to maximize resource extraction and profitability.
- 2013PE$350M
#7
Funding Raised · San Antonio, Texas · founded 2008 · 121 employees$250Mraised▾
Provider of ventilation system testing, measurement, adjustment, and certification services. These services ensure the proper functioning and safety of ventilation systems. The company utilizes digital measuring instruments and employs certified technicians with expertise in the field. They offer audits to assess the condition of existing ventilation systems and provide solutions to identified problems. Services are provided to a variety of sectors including automotive centers, office buildings, educational institutions, and more.
- Oct 2014Conventional Debt$200M
- Conventional Debt$50M
#8
Acquired · San Antonio, Texas · founded 2014 · 226 employees$275Mraised▾
Independent oil and gas exploration and development company. This entity engages in the exploration and development of oil and gas reserves. It manages all aspects of the process, from land acquisition and well drilling to production and sales of oil and natural gas. The company also handles related activities such as trucking and pipeline arrangements, and manages hedging strategies to mitigate market risks. Internal departments support these operations, including accounting, human resources, legal, and land management.
- 2014Conventional Debt$275M
- 2014Seed—
#9
Acquired · San Antonio, Texas · founded 2015 · 36 employees$250Mraised▾
Midstream oil & Gas company
- Jul 2015PE$250M
#10
Series B · San Antonio, Texas · founded 2018 · 2 employees$150Mraised▾
Natural gas midstream company
- Dec 2018Series B$150M
#11
Seed · San Antonio, Texas$500Kraised▾
Manufacturer of drill bits for use in the exploration and production of oil & gas sector
#12
Acquired · San Antonio, Texas · founded 2006 · 55 employees$57.3Mraised▾
Standard Renewable Energy provides energy solutions for homeowners, businesses, and government entities. The company offers spray-foam insulation, solar photovoltaic energy systems, solar water heating systems, and wind energy systems. The company offers solutions including solar photovoltaic, solar thermal, insulation, solar water heating, renewable energy, and backup power systems.
- Apr 2009Series C$12.3M
- Mar 2009Conventional Debt$10M
- Feb 2009Series B$27M
- 2007Series A$8M
Funding & investor landscape
Notable founders
Market landscape — 10 sub-themes by coverage
Share of Energy coverage by sub-theme.
Regulatory-risk over time rising
Funding & growth over time
funding rising · growth rising
How research on Grid Energy Storage is moving in the United States
A read on the academic research around Grid Energy Storage — which themes are gaining ground, the institutions and researchers driving them, and how the tone is shifting. Based on 5,941 United States-affiliated papers.
- Electric Power Research Institute204
- Pacific Northwest National Laboratory202
- Argonne National Laboratory193
- Northeastern University151
- Massachusetts Institute of Technology124
- Battery (electricity)57→359
- Electrolyte37→318
- Electrochemistry30→240
- Cathode32→224
- Anode37→209
- Renewable energy40→492
- Battery (electricity)59→507
- Power (physics)8→227
- Electrolyte27→244
- Electrochemistry37→240
- Battery (electricity)35→184
- Renewable energy24→156
- Electrolyte13→114
- Electrochemistry10→80
- Cathode9→72
Where energy storage is researched across United States
Location clusters by institution affiliation — each city's volume, stance tone, and a quick read on its hot topic, what's advancing, the opening opportunity, and the main concern.
Who's filing energy storage patents in the United States
United States energy storage patent filing is accelerating — 8,522 filings from 3,681 assignees (2016–2025), led by General Electric, ESS Technology, GM Global TECH Operations; annual filings 687→1058.
- General Electric592
- ESS Technology276
- GM Global TECH Operations233
- Fastcap Systems205
- UNIV California180
- Rondo Energy157
- United Technologies154
- Battelle Memorial Institute146
Common questions
Riya reads income statements for fun. She covers the real money in a sector — revenue, growth, who actually earns — and never met a vague claim she didn't want a number for.