The energy sector in the Czech Republic is characterized by a mix of large, established companies and mid-sized firms, with a strong presence in oil and gas, electric power generation, and specialized manufacturing. ExxonMobil, a global player, focuses on pioneering research and emissions reduction. ČEZ is a major energy group in Central and Southeastern Europe, while ORLEN Unipetrol is a leading refinery and petrochemical group.
A notable pattern is the concentration of headquarters in Prague, with nine of the listed companies based there. This includes innogy Česká republika, which supplies natural gas, electricity, and heat, and ComAp Group, a provider of smart power control solutions. Doosan Škoda Power, founded in 1859, designs and manufactures turbo-generator systems.
| # | Company | Employees | |||
|---|---|---|---|---|---|
| 1 |
ExxonMobilcorporate.exxonmobil.com
Scientists and engineers pioneering research, pursuing new technologies to reduce emissions, creating efficient fuels, meeting global energy needs, aiming net-zero emissions by 2050. |
73,163 | |||
| 2 | 5,944 | ||||
| 3 |
ORLEN Unipetrolorlenunipetrol.cz
A leading refinery and petrochemical group in the Czech Republic and Central/Eastern Europe, with a focus on downstream production and retail fuel distribution |
1,182 | |||
| 4 |
innogy Česká republikainnogy.cz
The company focuses on supplying natural gas, electricity, and heat to customers, as well as combined heat and power generation and solutions for clean mobility |
887 | |||
| 5 |
ComAp Groupcomap-control.com
Provider of smart power control solutions and services for independent and backup power generation markets, with a focus on flexibility, scalability, and sustainability |
633 | |||
| 6 |
VITKOVICEvitkovice.cz
A leading Czech engineering group with diverse machinery production, large investment assemblies, green technology, and information technology services |
548 | |||
| 7 |
NIKnik-global.com
A leading manufacturer in Eastern Europe producing energy metering devices, automatic meter reading systems, electrical equipment, and providing substation design and modernization services |
527 | |||
| 8 |
Doosan Škoda Powerdoosanskodapower.com
Designing and manufacturing efficient and reliable turbo-generator systems for power generation and industrial applications worldwide, with a focus on steam turbine technology |
520 | |||
| 9 |
ENERGO-PROenergo-pro.com
A hydropower company operating plants in multiple countries, with a focus on power generation, distribution grids, equipment supply, and environmental responsibility |
517 | |||
| 10 |
ČEPS, a.s.ceps.cz
The sole Czech Transmission System Operator responsible for maintaining and upgrading substations, managing electricity supply, organizing power exchanges, and supporting electricity market liberalization in Europe |
497 | |||
| 11 | 490 | ||||
| 12 |
MTX Group a.s.mtxgroup.cz
MTX Group is a significant industrial, commercial, and manufacturing holding company in the Czech Republic, focusing on managing, financing, and coordinating its subsidiaries |
490 | |||
| 13 | 461 | ||||
| 14 |
ÚJV Řež, a. s. (Nuclear Research Institute Rez plc)ujv.cz
Specializing in safe energy solutions, ÚJV Řež offers technical services, research, and infrastructure for nuclear energy, industry, and medicine through its subsidiaries |
460 | |||
| 15 | 446 | ||||
Want more companies than this list?This page shows the largest ones only. Connect to Tamtam to see every company that matches, filter by size, industry or growth, and reach their decision-makers. | |||||
| 16 |
Pražská energetika, a. s. (PRE)pre.cz
A leading energy group in the Czech Republic, specializing in electricity and gas sales, distribution, production, and energy services with a focus on innovation and energy efficiency |
440 | |||
| 17 | 375 | ||||
| 18 | 372 | ||||
| 19 |
Second Foundationsecond-foundation.eu
A tech company merging science and economics to develop market-beating trading strategies using mathematical models and advanced technology No clients, only internal innovation |
365 | |||
| 20 |
ŠKODA JSskoda-js.cz
A long-standing supplier of nuclear energy technologies, specializing in engineering, component manufacturing, and service for nuclear power plants worldwide |
352 | |||
| 21 |
PBS GROUP a.s.pbs.cz
A global engineering company group specializing in aerospace, power engineering, investment casting, and cryogenics, with a focus on innovation and quality |
320 | |||
| 22 |
Centrum výzkumu Řež / Research Centre Řežcvrez.cz
Research Centre Řež specializes in research, development, and innovation for the power generation industry, particularly in nuclear power, with cutting-edge technologies and international collaborations |
233 | |||
| 23 |
Photomatephotomate.eu
Authorized distributor for Huawei solar inverters in Middle and Eastern Europe, offering fast delivery, experienced engineers, multilingual support, and technical assistance |
195 | |||
| 24 | 183 | ||||
| 25 |
OMEXOM GA Energo s.r.o.gaenergo.cz
Power networks, Smart City Polygon, comprehensive solutions for power generation, distribution, transformation, and smart technologies for cities. |
104 | |||
| 26 |
Pražská teplárenská by Veoliaptas.cz
A leading thermal energy provider in the Czech Republic, specializing in heat and electricity production through cogeneration for residential and industrial clients in Prague |
101 | |||
| 27 |
Bonett Groupbonett.cz
Experienced partner in sales and investment of alternative fuel technologies, specializing in bioCNG, LNG, H2, biomethane, and LPG products Operating in Central Europe |
24 | |||
| 28 |
PREOL, a.s.preol.cz
Processing rapeseed seeds into refined oil, biodiesel, and glycerin using modern technology combined with sustainability principles. |
11 | |||
| 29 |
OlifeEnergyolife-energy.com
A Czech tech company specializing in developing and manufacturing AC/DC charging stations for electric vehicles |
11 | |||
| 30 |
EV Expert s.r.o.evexpert.eu
The company is a technological and trading company specializing in Electric Vehicles and energy flow, manufacturing premium AC charging stations They aim for a better world through their products |
7 | |||
Turn this list into pipeline
Tamtam finds the decision-makers at every company on a list like this one, with verified emails, phone numbers and the buying signals that tell you when to reach out.
How this list is built
Every company on this list has a Tamtam company profile. The industry is the one the company gives on LinkedIn; categories such as SaaS or fintech are classified by Tamtam's AI from the company's website and LinkedIn page; and the headquarters city must match the company's own address. Companies are ranked by the number of employees on LinkedIn, and the list is refreshed every night. Classifications can be wrong, so treat the list as a starting point rather than an official ranking. Last updated Nov 12, 2026.
More company lists in the Czech Republic
- The largest companies in the Czech Republic 858
- Multinational companies in the Czech Republic 258
- Manufacturers in the Czech Republic 100
- Companies with in-house R&D in the Czech Republic 99
- Critical infrastructure operators in the Czech Republic 85
- Financial services firms in the Czech Republic 79
- Retail chains in the Czech Republic 79
- Public sector organisations in the Czech Republic 78
- Companies with a mobile app in the Czech Republic 68
- Hardware manufacturers in the Czech Republic 67
- Financial Services companies in the Czech Republic 59
- IT Services and IT Consulting companies in the Czech Republic 57
- Corporate groups and holding companies in the Czech Republic 55
- E-commerce companies in the Czech Republic 53
- Software Development companies in the Czech Republic 52
- Education providers in the Czech Republic 47
- IT services companies in the Czech Republic 45
- SaaS companies in the Czech Republic 44
- Research institutes in the Czech Republic 41
- Professional services firms in the Czech Republic 35
- Higher Education companies in the Czech Republic 34
- Distributors and wholesalers in the Czech Republic 34
- Motor Vehicle Manufacturing companies in the Czech Republic 33
- Aerospace and defence companies in the Czech Republic 31