Electricity, gas, steam and air conditioning supply: the largest employers in Liège province
As of 14 Nov 2026, 25 companies in Electricity, gas, steam and air conditioning supply (NACE 35) in Liège province report employees in recent accounts (financial years 2024 to 2025). The 10 largest employers account for 1,896 FTE, out of 1,939.8 for all of them; median headcount is 4.1 FTE. RESA leads with 930.6 FTE (financial year 2025).
Top 25 · Electricity, gas, steam and air conditioning supply · Liège province
Ranked by average headcount (FTE) reported in the latest filed accounts (accounts less than 3 years old).
| # | Company | Total assets | Revenue | Equity | FTE | Year |
|---|---|---|---|---|---|---|
| 1 | RESA 4000 Liège | €2.25bn | €386.4m | €985.6m | 930.6 | 2025 |
| 2 | Clinique Psychiatrique des Frères Alexiens 4841 Welkenraedt | €27.0m | €37.0m | €9.13m | 400.0 | 2025 |
| 3 | TotalEnergies Power & Gas Belgium 4000 Liège | €448.7m | €1.61bn | €65.6m | 181.4 | 2025 |
| 4 | John Cockerill Hydrogen Belgium 4100 Seraing | €161.9m | €14.3m | €22.0m | 143.2 | 2025 |
| 5 | Balteau I.E. 4420 Saint-Nicolas | €18.3m | €30.6m | €7.51m | 130.4 | 2025 |
| 6 | John Cockerill Energy 4100 Seraing | €5.14m | €4.55m | −847,805 € | 28.2 | 2025 |
| 7 | Infratech 4890 Thimister-Clermont | €7.54m | €11.9m | €5.58m | 21.1 | 2025 |
| 8 | Power Online 4020 Liège | €198.0m | €574.7m | €35.1m | 21.1 | 2025 |
| 9 | 2Valorise Amel 4770 Amel | €20.9m | €3.21m | 716,933 € | 20.6 | 2025 |
| 10 | Gebrüder Lenges 4780 Sankt Vith | €15.2m | — | €12.3m | 19.4 | 2025 |
| 11 | Val Notre-Dame Internat 4520 Wanze | 606,224 € | €1.00m | 54,343 € | 16.2 | 2025 |
| 12 | Biogaz du Haut Geer 4250 Geer | €16.0m | — | €6.35m | 4.9 | 2025 |
| 13 | Courant d'Air 4750 Bütgenbach | €13.5m | — | €9.97m | 4.1 | 2025 |
| 14 | CORETEC Services 4340 Awans | €15.8m | €4.16m | €1.36m | 3.7 | 2025 |
| 15 | Publilec 4100 Seraing | €193.9m | — | €168.3m | 2.3 | 2025 |
| 16 | Ochain Energie 4560 Clavier | €5.67m | — | €2.96m | 2.3 | 2025 |
| 17 | Codel 4020 Liège | €10.6m | €26.8m | €2.27m | 2.0 | 2025 |
| 18 | Intelligent Technology Network 4280 Hannut | 120,462 € | 842,607 € | 104,533 € | 1.9 | 2025 |
| 19 | Immo A 4910 Theux | €1.40m | — | 131,800 € | 1.8 | 2025 |
| 20 | Coopérative d’ÉneRgie Liégeoise Citoyenne 4000 Liège | 711,640 € | — | 648,903 € | 1.4 | 2025 |
| 21 | Enercity 4530 Villers-le-Bouillet | €1.44m | — | €1.40m | 1.0 | 2025 |
| 22 | Reseau de Chaleur Pleiades 4020 Liège | 616,683 € | — | −833,753 € | 1.0 | 2025 |
| 23 | Leclerc-Energie 4608 Dalhem | 518,942 € | — | 161,614 € | 1.0 | 2024 |
| 24 | Bocagen 4650 Herve | 663,538 € | — | 544,272 € | 0.1 | 2025 |
| 25 | Ukko Energy 4000 Liège | €2.22m | — | €1.94m | 0.1 | 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. Headcount reported by the company for all its sites: the jobs may be located elsewhere.
“—”: 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 activities214
- 02 Forestry and logging35
- 08 Other mining and quarrying25
- 10 Manufacture of food products329
- 11 Manufacture of beverages28
- 13 Manufacture of textiles27
- 16 Manufacture of wood and of products of wood and cork, except furniture; manufacture of articles of straw and plaiting materials82
- 17 Manufacture of paper and paper products13
- 18 Printing and reproduction of recorded media59
- 20 Manufacture of chemicals and chemical products39
- 21 Manufacture of basic pharmaceutical products and pharmaceutical preparations25
- 22 Manufacture of rubber and plastic products51
- 23 Manufacture of other non-metallic mineral products81
- 24 Manufacture of basic metals40
- 25 Manufacture of fabricated metal products, except machinery and equipment371
- 26 Manufacture of computer, electronic and optical products50
- 27 Manufacture of electrical equipment36
- 28 Manufacture of machinery and equipment n.e.c.108
- 29 Manufacture of motor vehicles, trailers and semi-trailers24
- 30 Manufacture of other transport equipment15
- 31 Manufacture of furniture58
- 32 Other manufacturing65
- 33 Repair, maintenance and installation of machinery and equipment104
- 37 Sewerage11
- 38 Waste collection, recovery and disposal activities66
- 41 Construction of residential and non-residential buildings572
- 42 Civil engineering77
- 43 Specialised construction activities1,645
- 46 Wholesale trade1,029
- 47 Retail trade2,052
- 49 Land transport and transport via pipelines333
- 52 Warehousing, storage and support activities for transportation109
- 53 Postal and courier activities17
- 55 Accommodation171
- 56 Food and beverage service activities1,238
- 58 Publishing activities40
- 59 Motion picture, video and television programme production, sound recording and music publishing activities46
- 61 Telecommunication11
- 62 Computer programming, consultancy and related activities221
- 63 Computing infrastructure, data processing, hosting and other information service activities17
- 64 Financial service activities, except insurance and pension funding163
- 65 Insurance, reinsurance and pension funding, except compulsory social security11
- 66 Activities auxiliary to financial services and insurance activities296
- 68 Real estate activities384
- 69 Legal and accounting activities637
- 70 Activities of head offices and management consultancy363
- 71 Architectural and engineering activities; technical testing and analysis248
- 72 Scientific research and development54
- 73 Activities of advertising, market research and public relations84
- 74 Other professional, scientific and technical activities33
- 75 Veterinary activities51
- 77 Rental and leasing activities49
- 78 Employment activities54
- 79 Travel agency, tour operator and other reservation service and related activities32
- 80 Investigation and security activities13
- 81 Services to buildings and landscape activities215
- 82 Office administrative, office support and other business support activities103
- 85 Education144
- 86 Human health activities677
- 87 Residential care activities156
- 88 Social work activities without accommodation129
- 90 Arts creation and performing arts activities43
- 91 Libraries, archives, museums and other cultural activities19
- 92 Gambling and betting activities11
- 93 Sports activities and amusement and recreation activities150
- 94 Activities of membership organisations42
- 95 Repair and maintenance of computers, personal and household goods, and motor vehicles and motorcycles180
- 96 Personal service activities271
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 employer in Electricity, gas, steam and air conditioning supply in Liège province?
Among companies, RESA, with 930.6 full-time equivalents reported (financial year 2025).
Are all the jobs located in the area?
Not necessarily: headcount is reported by the company for all its sites, and the company is ranked by the address of its registered office. 25 out of 95 companies in the sector report employees there.
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.
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 →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.