Ranking · Liège province · NACE 35
Electricity, gas, steam and air conditioning supply: the largest companies in Liège province
As of 14 Nov 2026, 93 companies in Electricity, gas, steam and air conditioning supply (NACE 35) in Liège province publish total assets in recent accounts (financial years 2024 to 2026). The top 10 account for €3.55bn, out of €3.88bn for all of them; median total assets are €1.41m. RESA leads with €2.25bn (financial year 2025).
Top 50 · Electricity, gas, steam and air conditioning supply · Liège province
Ranked by total assets in the latest filed accounts. This is a size criterion, not an assessment.
| # | Company | Total assets | Revenue | Equity | FTE | Year |
|---|---|---|---|---|---|---|
| 1 | RESA 4000 Liège | €2.25bn | €386.4m | €985.6m | 930.6 | 2025 |
| 2 | TotalEnergies Power & Gas Belgium 4000 Liège | €448.7m | €1.61bn | €65.6m | 181.4 | 2025 |
| 3 | Power Online 4020 Liège | €198.0m | €574.7m | €35.1m | 21.1 | 2025 |
| 4 | Publilec 4100 Seraing | €193.9m | — | €168.3m | 2.3 | 2025 |
| 5 | John Cockerill Hydrogen Belgium 4100 Seraing | €161.9m | €14.3m | €22.0m | 143.2 | 2025 |
| 6 | Demainvest 4030 Liège | €81.4m | €3.32m | €6.71m | — | 2025 |
| 7 | Green4Power 4000 Liège | €80.1m | €13.0m | €9.37m | — | 2025 |
| 8 | TotalEnergies Integrated Power ESS Belgium 4000 Liège | €59.6m | €4.60m | 401,065 € | — | 2025 |
| 9 | TotalEnergies Gas & Power Western Europe 4000 Liège | €48.3m | €324.2m | 153,118 € | — | 2025 |
| 10 | Green for Power - Hélios 4000 Liège | €34.5m | — | −€1.21m | — | 2025 |
| 11 | Clinique Psychiatrique des Frères Alexiens 4841 Welkenraedt | €27.0m | €37.0m | €9.13m | 400.0 | 2025 |
| 12 | Condreole 4122 Neupré | €23.0m | — | €4.25m | — | 2025 |
| 13 | Energie-Fleuves 4040 Herstal | €21.2m | — | €16.3m | — | 2025 |
| 14 | 2Valorise Amel 4770 Amel | €20.9m | €3.21m | 716,933 € | 20.6 | 2025 |
| 15 | Balteau I.E. 4420 Saint-Nicolas | €18.3m | €30.6m | €7.51m | 130.4 | 2025 |
| 16 | Biogaz du Haut Geer 4250 Geer | €16.0m | — | €6.35m | 4.9 | 2025 |
| 17 | CORETEC Services 4340 Awans | €15.8m | €4.16m | €1.36m | 3.7 | 2025 |
| 18 | Gebrüder Lenges 4780 Sankt Vith | €15.2m | — | €12.3m | 19.4 | 2025 |
| 19 | Courant d'Air 4750 Bütgenbach | €13.5m | — | €9.97m | 4.1 | 2025 |
| 20 | EolSPI 4000 Liège | €13.2m | — | €1.11m | — | 2025 |
| 21 | Energie 2030 4730 Raeren | €11.8m | — | €10.6m | — | 2025 |
| 22 | Tailferhydro 4040 Herstal | €10.8m | — | €7.28m | — | 2025 |
| 23 | Codel 4020 Liège | €10.6m | €26.8m | €2.27m | 2.0 | 2025 |
| 24 | Green for Power - Beta 4000 Liège | €9.55m | — | €3.52m | — | 2025 |
| 25 | Infratech 4890 Thimister-Clermont | €7.54m | €11.9m | €5.58m | 21.1 | 2025 |
| 26 | Windfarm Sankt-Vith 4700 Eupen | €5.84m | — | €4.23m | — | 2025 |
| 27 | En Plein Vent 4750 Bütgenbach | €5.80m | — | −414,332 € | — | 2025 |
| 28 | Ochain Energie 4560 Clavier | €5.67m | — | €2.96m | 2.3 | 2025 |
| 29 | Rivierehydro 4040 Herstal | €5.40m | — | €3.39m | — | 2025 |
| 30 | John Cockerill Energy 4100 Seraing | €5.14m | €4.55m | −847,805 € | 28.2 | 2025 |
| 31 | Houxhydro 4040 Herstal | €4.98m | — | €3.45m | — | 2025 |
| 32 | WAL'EOL 4030 Liège | €4.85m | — | €1.48m | — | 2025 |
| 33 | WAL-Vent 4030 Liège | €4.75m | — | €1.91m | — | 2025 |
| 34 | Aux Vents de Liège 4432 Ans | €4.32m | — | €1.45m | — | 2025 |
| 35 | Ecolma 4400 Flémalle | €4.22m | 822,693 € | €4.20m | — | 2025 |
| 36 | Dries Energy 4770 Amel | €3.16m | €1.02m | 755,836 € | — | 2025 |
| 37 | Eole Modave 4577 Modave | €3.07m | — | €1.11m | — | 2025 |
| 38 | Zellik 2 4700 Eupen | €2.52m | — | −€1.70m | — | 2025 |
| 39 | Elicio Vents d'Ardenne 4000 Liège | €2.24m | — | 2,233 € | — | 2025 |
| 40 | Ukko Energy 4000 Liège | €2.22m | — | €1.94m | 0.1 | 2025 |
| 41 | Monceau Hydro 4570 Marchin | €1.95m | — | 337,735 € | — | 2025 |
| 42 | Mycool 4530 Villers-le-Bouillet | €1.93m | — | 256,204 € | — | 2026 |
| 43 | Merytherm 4130 Esneux | €1.79m | — | 963,513 € | — | 2025 |
| 44 | K.W.P. Invest 4731 Raeren | €1.74m | — | 409,330 € | — | 2024 |
| 45 | Eolienne de Hamois 4750 Bütgenbach | €1.63m | — | 105,481 € | — | 2025 |
| 46 | Enercity 4530 Villers-le-Bouillet | €1.44m | — | €1.40m | 1.0 | 2025 |
| 47 | Hydro JM 4960 Malmedy | €1.41m | — | 85,731 € | — | 2025 |
| 48 | Immo A 4910 Theux | €1.40m | — | 131,800 € | 1.8 | 2025 |
| 49 | Lern Apprend 4750 Bütgenbach | €1.35m | — | €1.15m | — | 2025 |
| 50 | Eoliennes de Bastogne 4750 Bütgenbach | €1.27m | — | 392,884 € | — | 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.
“—”: not published. Small companies (micro and abridged accounts) do not have to publish their revenue.
Electricity, gas, steam and air conditioning supply across Belgium → All sectors · Liège province →
Other sectors · Liège province
- 01 Crop and animal production, hunting and related service activities725
- 02 Forestry and logging111
- 08 Other mining and quarrying38
- 10 Manufacture of food products491
- 11 Manufacture of beverages80
- 13 Manufacture of textiles51
- 14 Manufacture of wearing apparel26
- 16 Manufacture of wood and of products of wood and cork, except furniture; manufacture of articles of straw and plaiting materials151
- 17 Manufacture of paper and paper products14
- 18 Printing and reproduction of recorded media145
- 20 Manufacture of chemicals and chemical products65
- 21 Manufacture of basic pharmaceutical products and pharmaceutical preparations57
- 22 Manufacture of rubber and plastic products67
- 23 Manufacture of other non-metallic mineral products114
- 24 Manufacture of basic metals50
- 25 Manufacture of fabricated metal products, except machinery and equipment623
- 26 Manufacture of computer, electronic and optical products82
- 27 Manufacture of electrical equipment67
- 28 Manufacture of machinery and equipment n.e.c.143
- 29 Manufacture of motor vehicles, trailers and semi-trailers41
- 30 Manufacture of other transport equipment22
- 31 Manufacture of furniture88
- 32 Other manufacturing131
- 33 Repair, maintenance and installation of machinery and equipment237
- 37 Sewerage25
- 38 Waste collection, recovery and disposal activities103
- 41 Construction of residential and non-residential buildings1,295
- 42 Civil engineering148
- 43 Specialised construction activities3,733
- 46 Wholesale trade2,369
- 47 Retail trade3,826
- 49 Land transport and transport via pipelines598
- 51 Air transport20
- 52 Warehousing, storage and support activities for transportation222
- 53 Postal and courier activities47
- 55 Accommodation465
- 56 Food and beverage service activities2,103
- 58 Publishing activities115
- 59 Motion picture, video and television programme production, sound recording and music publishing activities146
- 60 Programming, broadcasting, news agency and other content distribution activities17
- 61 Telecommunication29
- 62 Computer programming, consultancy and related activities1,168
- 63 Computing infrastructure, data processing, hosting and other information service activities105
- 64 Financial service activities, except insurance and pension funding1,229
- 65 Insurance, reinsurance and pension funding, except compulsory social security36
- 66 Activities auxiliary to financial services and insurance activities648
- 68 Real estate activities3,906
- 69 Legal and accounting activities1,664
- 70 Activities of head offices and management consultancy3,852
- 71 Architectural and engineering activities; technical testing and analysis1,299
- 72 Scientific research and development137
- 73 Activities of advertising, market research and public relations552
- 74 Other professional, scientific and technical activities330
- 75 Veterinary activities202
- 77 Rental and leasing activities235
- 78 Employment activities86
- 79 Travel agency, tour operator and other reservation service and related activities71
- 80 Investigation and security activities37
- 81 Services to buildings and landscape activities507
- 82 Office administrative, office support and other business support activities622
- 84 Public administration and defence; compulsory social security11
- 85 Education409
- 86 Human health activities4,749
- 87 Residential care activities183
- 88 Social work activities without accommodation176
- 90 Arts creation and performing arts activities191
- 91 Libraries, archives, museums and other cultural activities24
- 92 Gambling and betting activities21
- 93 Sports activities and amusement and recreation activities398
- 94 Activities of membership organisations79
- 95 Repair and maintenance of computers, personal and household goods, and motor vehicles and motorcycles422
- 96 Personal service activities602
Municipalities with the most companies in the sector · Liège province
- 4000 Liège (Glain, Rocourt)15
- 4750 Bütgenbach (Elsenborn)7
- 4020 Liège (Bressoux, Jupille-Sur-Meuse, Wandre)5
- 4040 Herstal4
- 4960 Malmedy (Bevercé)4
- 4030 Liège (Grivegnee)3
- 4100 Seraing (Boncelles)3
- 4570 Marchin (Vyle-Et-Tharoul)3
- 4700 Eupen3
- 4770 Amel (Amblève, Meyerode)3
- 4870 Trooz (Forêt, Fraipont, Nessonvaux)3
- 4122 Neupré (Plainevaux)2
Frequently asked questions
Which is the largest company in Electricity, gas, steam and air conditioning supply in Liège province?
By total assets, it is RESA (€2.25bn, financial year 2025).
How many companies in Electricity, gas, steam and air conditioning supply in Liège province are ranked?
93 out of 95 active companies in the sector with their registered office in the area: those whose latest accounts are less than 3 years old.
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.
Idonis
Analyse companies · Liège province
Filter these companies by size, soundness and trend, follow them and get an alert when their accounts or publications change.
Open the full file →Free account in 30 seconds, by email. No bank card.
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.