| # | Company | Employees |
|---|---|---|
| 1 |
John Cockerilljohncockerill.com
Designs, integrates, modernizes, maintains equipment for energy, defense, steelmaking, environment, and industry, focusing on performance, innovation, and global reach. |
6,989 |
| 2 |
Umicoreumicore.com
Innovating materials technology for sustainable value, reducing emissions, advancing car technology, and driving towards a circular economy for a better life |
6,685 |
| 3 |
DEME Groupdeme-group.com
A leading contractor in offshore energy, environmental remediation, dredging, and marine infrastructure, with a focus on sustainability and innovative solutions |
5,770 |
| 4 |
Fluviusfluvius.be
A multi-utility provider in Flanders managing millions of connections for electricity, gas, cable, and sewage in all 300 Flemish municipalities |
3,771 |
| 5 |
ENGIE Belgiumengie.be
Belgian market leader in electricity, natural gas, and energy services, offering innovative solutions for more economical, low-carbon energy use |
3,272 |
| 6 |
Elia Groupelia.be
Operation of extensive high-voltage electricity transmission networks in Belgium and Germany, ensuring balanced supply and supporting energy transition. |
2,759 |
| 7 | 2,262 | |
| 8 | 2,166 | |
| 9 |
Tessenderlo Grouptessenderlo.com
Global industrial group specializing in agriculture, bio-residual valorization, machinery, mechanical engineering, electronics, energy, and water-focused industrial solutions. |
1,800 |
| 10 | 1,756 | |
| 11 |
Luminusluminus.be
A leading energy company in Belgium, specializing in onshore wind energy, hydropower, and natural gas power plants to provide electricity and energy services |
1,365 |
| 12 |
Fluxysfluxys.com
A global energy infrastructure group focused on transporting carbon-neutral energy carriers, storing carbon dioxide, and operating gas transmission & storage facilities |
1,259 |
| 13 |
Smulderssmulders.com
A multidisciplinary construction entity specializing in civil, industrial, and offshore wind energy projects across various international branches |
1,084 |
| 14 | 982 | |
| 15 |
Sibelgasibelga.be
The company operates as a distribution network operator for electricity and natural gas in the Brussels region, managing distribution networks |
944 |
| 16 |
ENGIE Cofely Belgiumengie-cofely.be
Specialists in energy management and facility services, providing global solutions for public and private buildings, industry, airports, and data centers |
896 |
| 17 | 890 | |
| 18 |
Veolia | Belgium & Luxembourgveolia.be
Leading provider in Belgium and Luxembourg offering integrated solutions for water, waste, and energy management, aiming to reduce environmental impact and accelerate ecological transition |
885 |
| 19 | 845 | |
| 20 |
Hamon Groupenergy.johncockerill.com
The company provides air quality, cooling, and heat recovery systems for industry and power generation, focusing on efficiency and reducing carbon footprint |
684 |
| 21 |
VGPvgpparks.eu
Pan-European developer and manager of logistics properties, semi-industrial properties, and renewable energy solutions with a fully integrated business model and extensive expertise |
620 |
| 22 |
EDF EU Affairsedf.fr
A leading electricity company in Europe, focused on sustainable energy, innovation, and environmental responsibility while actively participating in EU policy dialogue |
521 |
| 23 | 470 | |
| 24 |
VYNCKEvyncke.com
Designs and constructs energy plants processing biomass to produce thermal energy and electricity, offering various energy mediums and global presence |
446 |
| 25 |
Laboreleclaborelec.com
A leading expertise and research center in electrical power technology, providing specialized services and solutions for the energy transition globally |
418 |
| 26 |
Virya Energyvirya-energy.com
Develops, finances, operates sustainable energy projects across Europe and Asia, including grid solutions, hydrogen initiatives, and strategic investments in renewable innovators. |
287 |
| 27 |
Eneco Belgiumeneco.be
Sustainable energy provider focused on locally produced renewable energy, building strong partnerships with customers, offering professional advice on renewable technologies |
284 |
| 28 |
TotalEnergies Power & Gas Belgiumtotalenergies.be
Supplier of green electricity for residential and mobile use, focusing on sustainable energy solutions for homes and transportation. |
264 |
| 29 | 223 | |
| 30 |
Anglo Belgian Corporationabc-engines.com
The company designs and manufactures medium speed diesel engines for various applications worldwide, focusing on efficiency, power, and reduced emissions |
182 |
| 31 |
Keppel Seghers Belgiumkeppelseghersbelgium.com
A leading provider of environmental technology solutions, offering comprehensive services in waste-to-energy projects and plant operations with a global presence |
169 |
| 32 |
SPG Dry Coolingspgdrycooling.com
A leading manufacturer of air-cooled condensers for power generation and industrial plants worldwide, known for innovation and exceptional quality |
162 |
| 33 |
CG Power Systems Belgiumcgglobal.com
Global leader in managing and applying electrical energy, providing products, systems, and services for utilities, power generation, industries, and consumers worldwide |
141 |
| 34 |
CE+T Powercet-power.com
Design and manufacture of modular, redundant AC backup systems for mission critical industrial applications, focusing on high efficiency, uptime and low maintenance. |
135 |
| 35 |
Bosch Belgiumbosch.be
Innovative global leader in business sectors including mobility, industrial technology, consumer goods, and energy/building technology, striving to improve quality of life |
132 |
| 36 |
Aukera Energyaukera.energy
Renewable energy firm focused on leading the global transition to clean energy in Europe through investments, development, and construction projects |
127 |
| 37 | 119 | |
| 38 |
Smappeesmappee.com
An award-winning global cleantech organization focused on saving customers energy and money through reducing energy consumption and improving efficiency |
112 |
| 39 | 109 | |
| 40 |
Aspiraviaspiravi.com
Leading Belgian company in renewable energy, specializing in producing and supplying green electricity and heat with a long-term vision and participatory approach |
101 |
| 41 |
Veolia | Flexcityflexcity.energy
This organization helps industrial and commercial establishments in multiple countries optimize their electricity assets for revenue and contribute to national power supply security |
100 |
| 42 |
VINCI Energies Belgiumvinci-energies.be
Specializing in energy, transport, and communication infrastructure, VINCI Energies focuses on digital transformation and energy transition through innovative solutions and regional expertise |
96 |
| 43 |
Parkwindparkwind.eu
An integrated offshore wind business developing, financing, and operating wind farms globally, with a focus on making green energy accessible and affordable for all |
95 |
| 44 |
MobilityPlusmobilityplus.be
The company offers convenient and innovative electric charging solutions, including charge cards and charge points for hassle-free charging anytime, anywhere |
86 |
| 45 |
Relyrelysolutions.com
Innovative company speeding up decarbonization for energy producers and heavy industries by advancing green hydrogen Power-to-X technology to reach net zero goals |
82 |
| 46 |
Weishaupt BeLuxweishaupt.be
A family-owned company providing energy solutions like burners, condensation systems, heat pumps, and building management systems to contribute indirectly to climate goals |
74 |
| 47 |
Omexom Belgiumomexom.be
Offering tailored solutions for the generation, transmission, transformation, and distribution of electrical energy with a team of 100 specialized employees From design to maintenance |
73 |
| 48 | 73 | |
| 49 |
ENGIE EMS - European Maintenance Supportengie.com
Specialized service provider offering tailored asset management solutions and maintenance expertise to enhance profitability of power and heat generation assets |
69 |
| 50 |
Luminus Solutionsluminussolutions.be
Guiding B2B customers through energy transition with tailored energy solutions including CHP plants, HVAC optimization, building renovation, maintenance, and power supply security |
65 |
| 51 |
Cenergy Holdingscenergyholdings.com
Investment group focusing on energy transfer, renewables, and data transmission, aiming for a low carbon economy and leading roles in industrial sectors |
64 |
| 52 |
Comfort Energy Groupcomfortenergygroup.com
The company focuses on sustainable energy solutions, operational excellence through digitalization, customer intimacy, and guiding customers through the energy life cycle |
62 |
| 53 | 61 | |
| 54 |
Linea Trovata Grouplineatrovata.com
An innovative company offering sustainable energy solutions integrating sun, wind, biomass, and water cycles while providing investment opportunities for solar projects |
60 |
| 55 |
Energy Solutions Groupenergysolutionsgroup.be
Independent power producer specializing in renewable energy in Belgium and the Netherlands. Company accelerates sustainable energy transition by investing in solar, wind, charging, and storage. |
58 |
| 56 |
Energreenenergreen.com
This company is focused on providing green and durable energy solutions to accelerate the transition to a smarter, greener, and more sustainable future worldwide |
57 |
| 57 |
Eneria Belgium & Luxembourgeneria.be
Provider of comprehensive, competitively priced, and environmentally friendly power generation and engine solutions, aiming to be the preferred partner for all stakeholders |
57 |
| 58 |
Clean Hydrogen Partnershipclean-hydrogen.europa.eu
Finances research, development, and demonstration projects for hydrogen and fuel cells, accelerating commercial deployment of hydrogen-based energy and transport solutions across Europe. |
56 |
| 59 |
Circle K Belgium
A Belgium-based fuel service station retailer offering TotalEnergies products, convenience items, high-power EV charging, truck services, car washes, and a unique Belgian restaurant concept |
44 |
| 60 |
LIFEPOWRlifepowr.io
A dynamic team in Antwerp develops smart energy solutions for a balanced electricity grid, empowering end-users to contribute and benefit |
36 |
| 61 |
Eneco eMobility Belgiumeneco-emobility.com
Strong European player in sustainable mobility and chargepoint operations, helping clients overcome e-mobility market uncertainties and obstacles for a sustainable business shift. |
35 |
| 62 |
Groupe FranΓ§oisgf-groupe.com
Operating bio-sites in Belgium and Luxembourg, focuses on sustainable packaging, energy production from wood, and consumer products like horse bedding, with full energy autonomy. |
35 |
| 63 |
SOLiTHORsolithor.com
Commercialisation of solid-state lithium technology for transport applications, producing pouch cells and battery systems with research focused on electrolytes and lithium anodes. |
33 |
| 64 |
Powerstationpowerstation.be
Offers stylish, elegant, reliable, and sustainable EV charging solutions for homes, businesses, and the public sector, including installation, smart management, and maintenance services. |
32 |
| 65 |
ESEesegroup.be
ESE provides tailored and eco-friendly solutions for energy problems, specializing in PV installations, automation, energy management, roofing, and service for residential and industrial clients |
28 |
| 66 |
Capnercapner-group.com
Capner helps individuals and businesses achieve energy independence by offering integrated solutions for producing, storing, and utilizing renewable energy sources efficiently |
28 |
| 67 | 23 | |
| 68 |
C-energyc-energy.be
Innovative energy solutions provider offering tailored Energy-as-a-Service, specializing in energy management, storage, optimization, and trading for a sustainable future |
23 |
| 69 | 22 | |
| 70 |
CenEnergycenenergy.be
Provides tailored electric vehicle charging solutions for businesses, institutions, non-profits, and individuals, including installation, maintenance, and extensive charging network access across Europe. |
21 |
| 71 |
Ecostal Group
Innovative and sustainable solutions for professionals in the solar energy industry, offering a broad range of services and products |
19 |
| 72 |
Virya Energy Belgiumeoly-energy.com
A renewable energy producer and supplier born out of Colruyt Group, focusing on wind energy projects and community involvement for clean energy |
19 |
| 73 |
STROOHM (formerly known as Pluginvest)stroohm.com
High-tech charging infrastructure solutions for electric mobility at workplaces and employee homes, with accompanying services, managing all aspects for businesses. |
18 |
| 74 |
Callens-Vynckecallensvyncke.com
Provider of customized energy solutions for industries, offering turnkey projects, engineering, procurement, construction, and service contracts for optimal performance and minimal operational costs |
17 |
| 75 | 14 | |
| 76 |
GR TECHNICSgr-technics.be
Specializing in mobile lighting, light towers, camera towers, and hybrid systems for safety and illumination on construction sites, events, and more Trusted for quality, flexibility, and service |
13 |
| 77 |
Go Wattsgowatts.be
Provides tailored, sustainable charging solutions and comprehensive services for electric vehicles at home and work, ensuring present and future needs are met. |
13 |
| 78 |
Blitz Power
Offers tailored charging solutions for electric cars, providing services for both home and work environments, founded by an entrepreneurial family. |
13 |
| 79 | 12 | |
| 80 |
Certipowercertipower.be
Provides charging stations and software compatible with all electric vehicles, parking spots, and locations, offering comprehensive EV charging solutions. |
11 |
| 81 | 11 | |
| 82 |
Suerickx Energiessuerickxenergies.be
An energy company specializing in designing, building, financing, and maintaining renewable energy installations, believing in a sustainable future |
10 |
| 83 |
247.energy247.energy
Innovative energy company revolutionizing global energy landscapes with cutting-edge technology for stable costs and sustainable future |
9 |
| 84 |
Enthrust Energyenthrust.energy
Energy efficiency partner offering patented technologies for electricity savings and innovative hydrogen storage solutions, focused on reducing costs and improving sustainability |
9 |
| 85 |
Hyve
Hyve is revolutionizing hydrogen production by minimizing costs through innovative nano-engineered materials, sustainability partnerships, and a focus on clean energy solutions |
7 |
| 86 |
Helios Grouphelios-group.be
Designing, developing, and operating innovative green and local electricity production solutions, shaping a greener, more sustainable energy future in Belgium. |
5 |
| 87 |
SOLENCO POWER NVsolencopower.com
Renewable energy storage system using hydrogen technology, providing heat and electrical power, eliminating the need for a grid connection, and enabling energy sharing between households |
5 |
| 88 |
Greenerthingsaditek-group.be
A company specializing in zero-energy solutions, likely focused on sustainable and environmentally friendly energy solutions and technologies |
5 |
| 89 |
WinWattwinwatt.eu
The company specializes in providing integrated solutions for clean and cost-effective energy production, storage, and demand management in Belgium and Luxembourg |
4 |
| 90 |
JASPAR Valves and Maintenancejaspar.be
A long-standing industrial valves company, specializing in high-performance solutions, particularly in the nuclear sector Expertise in analysis and engineering Reputation extends beyond Belgium |
4 |
| 91 |
VANDENBORRE ENERGY SYSTEMSvdbenergy.com
A Belgian company specializing in R&D, design, manufacturing, and distribution of hydrogen products and services for residential, industrial, and renewable energy applications |
2 |
| 92 | 2 | |
| 93 | 2 | |
| 94 |
Klima-Thuiscaptarbv2.wordpress.com
A dynamic company specializing in sustainable energy solutions with industry-leading experts focused on implementing green solutions for home use |
1 |
| 95 |
ENFINDUS BVBAenfindus.com
A leading provider of renewable energy solutions, offering clean energy options to reduce energy bills, GHG emissions, and promote Electric/Hydrogen vehicles |
1 |
| 96 |
ENORA - CNGenora-cng.be
A partnership between energy companies developing CNG fuel stations for public use in Belgium, with multiple stations operational and more in development |
1 |
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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 Oct 24, 2026.
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