Ranking · Wallonia · NACE 35
Electricity, gas, steam and air conditioning supply: highest revenue in Wallonia
As of 14 Nov 2026, 64 companies in Electricity, gas, steam and air conditioning supply (NACE 35) in Wallonia publish their revenue in recent accounts (financial years 2024 to 2026). The top 10 account for €5.21bn, out of €5.48bn for all of them; median revenue is €3.23m. TotalEnergies Power & Gas Belgium leads with €1.61bn (financial year 2025).
Top 50 · Electricity, gas, steam and air conditioning supply · Wallonia
Ranked by revenue published in the latest filed accounts (accounts less than 3 years old).
| # | Company | Total assets | Revenue | Equity | FTE | Year |
|---|---|---|---|---|---|---|
| 1 | TotalEnergies Power & Gas Belgium 4000 Liège | €448.7m | €1.61bn | €65.6m | 181.4 | 2025 |
| 2 | ORES Assets 6041 Charleroi | €5.23bn | €1.16bn | €2.07bn | — | 2025 |
| 3 | Operateur de Reseaux d'Energies 6041 Charleroi | €2.83bn | €920.9m | 461,806 € | 3,000.0 | 2025 |
| 4 | Power Online 4020 Liège | €198.0m | €574.7m | €35.1m | 21.1 | 2025 |
| 5 | RESA 4000 Liège | €2.25bn | €386.4m | €985.6m | 930.6 | 2025 |
| 6 | TotalEnergies Gas & Power Western Europe 4000 Liège | €48.3m | €324.2m | 153,118 € | — | 2025 |
| 7 | TotalEnergies - Centrale Electrique Marchienne-au-Pont 6030 Charleroi | €66.1m | €134.9m | €36.9m | 39.0 | 2025 |
| 8 | Clinique Psychiatrique des Frères Alexiens 4841 Welkenraedt | €27.0m | €37.0m | €9.13m | 400.0 | 2025 |
| 9 | Comptoir Citoyen des Energies 7900 Leuze-en-Hainaut | €8.00m | €30.8m | €3.07m | 10.9 | 2025 |
| 10 | Balteau I.E. 4420 Saint-Nicolas | €18.3m | €30.6m | €7.51m | 130.4 | 2025 |
| 11 | Codel 4020 Liège | €10.6m | €26.8m | €2.27m | 2.0 | 2025 |
| 12 | Association Intercommunale d'Electricité du Sud du Hainaut 6470 Sivry-Rance | €80.3m | €21.3m | €49.8m | 52.7 | 2025 |
| 13 | Association Intercommunale d'Etudes et d'Exploitation d'Electricité et de Gaz 5300 Andenne | €74.1m | €20.1m | €49.6m | 45.8 | 2025 |
| 14 | Hegoa Wind 1300 Wavre | €62.2m | €17.9m | €17.6m | — | 2026 |
| 15 | Eol'Wapi 7500 Tournai | €121.9m | €17.4m | €81.8m | — | 2025 |
| 16 | Bertemes 6690 Vielsalm | €53.5m | €16.3m | €3.65m | — | 2025 |
| 17 | Eneco Wind Belgium 1300 Wavre | €510.6m | €15.1m | €351.9m | 46.7 | 2025 |
| 18 | Reseau d'Energies de Wavre 1301 Wavre | €84.5m | €14.7m | €62.0m | 35.0 | 2025 |
| 19 | John Cockerill Hydrogen Belgium 4100 Seraing | €161.9m | €14.3m | €22.0m | 143.2 | 2025 |
| 20 | Green4Power 4000 Liège | €80.1m | €13.0m | €9.37m | — | 2025 |
| 21 | Infratech 4890 Thimister-Clermont | €7.54m | €11.9m | €5.58m | 21.1 | 2025 |
| 22 | Renewable Power Company 6680 Sainte-Ode | €55.5m | €10.1m | €51.9m | — | 2025 |
| 23 | Cgnee Belgium Wind Energy Company 7000 Mons | €14.9m | €7.66m | −499,748 € | — | 2025 |
| 24 | Sirocco Wind 1300 Wavre | €38.1m | €7.41m | €11.6m | — | 2026 |
| 25 | Wind4Wallonia 2 6000 Charleroi | €48.7m | €5.79m | €10.2m | — | 2025 |
| 26 | ActiVent Wallonie 6000 Charleroi | €102.1m | €5.22m | €18.6m | — | 2025 |
| 27 | TotalEnergies Integrated Power ESS Belgium 4000 Liège | €59.6m | €4.60m | 401,065 € | — | 2025 |
| 28 | John Cockerill Energy 4100 Seraing | €5.14m | €4.55m | −847,805 € | 28.2 | 2025 |
| 29 | CORETEC Services 4340 Awans | €15.8m | €4.16m | €1.36m | 3.7 | 2025 |
| 30 | ENoRa 7500 Tournai | €3.88m | €3.36m | €1.94m | — | 2025 |
| 31 | Demainvest 4030 Liège | €81.4m | €3.32m | €6.71m | — | 2025 |
| 32 | MyPower 7700 Mouscron | €6.58m | €3.26m | 601,011 € | — | 2024 |
| 33 | 2Valorise Amel 4770 Amel | €20.9m | €3.21m | 716,933 € | 20.6 | 2025 |
| 34 | Solano Wind 1300 Wavre | €6.57m | €2.87m | €4.78m | — | 2026 |
| 35 | Newcastle Wind 1300 Wavre | €14.6m | €2.58m | €3.86m | — | 2026 |
| 36 | Wind4Wallonia 3 6000 Charleroi | €18.3m | €2.58m | €2.86m | — | 2025 |
| 37 | Vents d'Houyet 5560 Houyet | €12.0m | €2.39m | €2.92m | 2.5 | 2025 |
| 38 | Elawan Energy Salazine 5101 Namur | €19.9m | €2.00m | −272,762 € | — | 2025 |
| 39 | Cordona Wind 1300 Wavre | €7.72m | €1.93m | €3.69m | — | 2026 |
| 40 | Green City Wallonie 3 7330 Saint-Ghislain | €26.1m | €1.56m | €3.80m | — | 2025 |
| 41 | Snow Events International 7780 Comines-Warneton | €3.98m | €1.41m | −33,803 € | 5.3 | 2025 |
| 42 | Wind2Trucks 7500 Tournai | €3.67m | €1.03m | €3.25m | — | 2025 |
| 43 | Dries Energy 4770 Amel | €3.16m | €1.02m | 755,836 € | — | 2025 |
| 44 | Val Notre-Dame Internat 4520 Wanze | 606,224 € | €1.00m | 54,343 € | 16.2 | 2025 |
| 45 | Les Moulins du Haut-Pays 7370 Dour | €2.67m | 906,422 € | €1.21m | — | 2025 |
| 46 | Les Vents de l'Ornoi 1300 Wavre | 875,940 € | 843,944 € | 83,715 € | — | 2026 |
| 47 | Intelligent Technology Network 4280 Hannut | 120,462 € | 842,607 € | 104,533 € | 1.9 | 2025 |
| 48 | Ecolma 4400 Flémalle | €4.22m | 822,693 € | €4.20m | — | 2025 |
| 49 | Optivents 5560 Houyet | €2.06m | 791,348 € | 632,529 € | — | 2025 |
| 50 | Ourth'Eole 5560 Houyet | €3.89m | 760,826 € | 241,855 € | — | 2025 |
Ranking based on each company's own annual accounts (statutory, not consolidated): a subsidiary and its parent appear separately, and the ranking differs from lists based on consolidated group accounts. These are the revenue figures published in the annual accounts. Small companies (micro and abridged accounts) do not have to publish theirs: they do not appear in this ranking.
Electricity, gas, steam and air conditioning supply across Belgium → All sectors · Wallonia →
Other sectors · Wallonia
- 01 Crop and animal production, hunting and related service activities240
- 02 Forestry and logging49
- 08 Other mining and quarrying37
- 10 Manufacture of food products214
- 11 Manufacture of beverages37
- 13 Manufacture of textiles28
- 16 Manufacture of wood and of products of wood and cork, except furniture; manufacture of articles of straw and plaiting materials61
- 17 Manufacture of paper and paper products15
- 18 Printing and reproduction of recorded media47
- 20 Manufacture of chemicals and chemical products80
- 21 Manufacture of basic pharmaceutical products and pharmaceutical preparations46
- 22 Manufacture of rubber and plastic products42
- 23 Manufacture of other non-metallic mineral products86
- 24 Manufacture of basic metals43
- 25 Manufacture of fabricated metal products, except machinery and equipment180
- 26 Manufacture of computer, electronic and optical products38
- 27 Manufacture of electrical equipment36
- 28 Manufacture of machinery and equipment n.e.c.71
- 29 Manufacture of motor vehicles, trailers and semi-trailers16
- 30 Manufacture of other transport equipment13
- 31 Manufacture of furniture26
- 32 Other manufacturing39
- 33 Repair, maintenance and installation of machinery and equipment53
- 37 Sewerage13
- 38 Waste collection, recovery and disposal activities64
- 41 Construction of residential and non-residential buildings401
- 42 Civil engineering77
- 43 Specialised construction activities959
- 46 Wholesale trade927
- 47 Retail trade1,359
- 49 Land transport and transport via pipelines246
- 52 Warehousing, storage and support activities for transportation104
- 53 Postal and courier activities19
- 55 Accommodation117
- 56 Food and beverage service activities565
- 58 Publishing activities38
- 59 Motion picture, video and television programme production, sound recording and music publishing activities53
- 61 Telecommunication18
- 62 Computer programming, consultancy and related activities309
- 63 Computing infrastructure, data processing, hosting and other information service activities31
- 64 Financial service activities, except insurance and pension funding321
- 66 Activities auxiliary to financial services and insurance activities127
- 68 Real estate activities852
- 69 Legal and accounting activities276
- 70 Activities of head offices and management consultancy642
- 71 Architectural and engineering activities; technical testing and analysis267
- 72 Scientific research and development36
- 73 Activities of advertising, market research and public relations111
- 74 Other professional, scientific and technical activities57
- 75 Veterinary activities39
- 77 Rental and leasing activities59
- 78 Employment activities39
- 79 Travel agency, tour operator and other reservation service and related activities32
- 80 Investigation and security activities15
- 81 Services to buildings and landscape activities144
- 82 Office administrative, office support and other business support activities180
- 84 Public administration and defence; compulsory social security13
- 85 Education314
- 86 Human health activities580
- 87 Residential care activities201
- 88 Social work activities without accommodation174
- 90 Arts creation and performing arts activities95
- 91 Libraries, archives, museums and other cultural activities20
- 92 Gambling and betting activities12
- 93 Sports activities and amusement and recreation activities118
- 94 Activities of membership organisations100
- 95 Repair and maintenance of computers, personal and household goods, and motor vehicles and motorcycles130
- 96 Personal service activities171
Municipalities with the most companies in the sector · Wallonia
- 7500 Tournai (Ere, Saint-Maur)20
- 4000 Liège (Glain, Rocourt)15
- 6220 Fleurus (Heppignies, Lambusart, Wangenies)15
- 1300 Wavre (Limal)10
- 5560 Houyet (Ciergnon, Finnevaux, Hulsonniaux, …)9
- 4750 Bütgenbach (Elsenborn)7
- 1435 Mont-Saint-Guibert (Corbais, Hévillers)6
- 4020 Liège (Bressoux, Jupille-Sur-Meuse, Wandre)5
- 7900 Leuze-en-Hainaut (Grandmetz)5
- 4040 Herstal4
- 4960 Malmedy (Bevercé)4
- 6000 Charleroi4
Frequently asked questions
Which company in Electricity, gas, steam and air conditioning supply in Wallonia has the highest revenue?
TotalEnergies Power & Gas Belgium, with €1.61bn of published revenue (financial year 2025).
Why are some companies missing?
Small companies (micro and abridged accounts) do not have to publish their revenue: only the 64 that publish it, out of 278 companies in the sector in the area, are ranked.
Why does this ranking differ from other lists?
It uses each company's annual accounts as filed with the National Bank, not consolidated group accounts. A holding, a subsidiary or a purchasing entity can therefore appear separately. Only companies whose latest accounts are less than 3 years old are ranked.
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Active companies (legal entities) that have filed at least one set of annual accounts, based on the Crossroads Bank for Enterprises and the National Bank of Belgium. The sector is the main activity in the register; the municipality is that of the registered office. Data updated on 14 Nov 2026.