| Nord Picardie Maintenance Service | Nord | 2025 | 99 |
| Forlumen | Seine-Maritime | 2025 | 98 |
| Emalec | Rhône | 2025 | 98 |
| L'est Electrique | Doubs | 2023 | 98 |
| Sdel Tertiaire | Hauts-de-Seine | 2025 | 97 |
| Edf Solutions Solaires | Rhône | 2025 | 96 |
| Cegelec Infra Bretagne | Côtes-d'Armor | 2023 | 95 |
| G.r.i. | Seine-et-Marne | 2022 | 95 |
| Spie Industrie | Haute-Garonne | 2025 | 95 |
| Sdel Dauphine Savoie | Isère | 2023 | 94 |
| Aquitaine Reseaux | Charente-Maritime | 2019 | 94 |
| Chubb France | Val-d'Oise | 2025 | 94 |
| Astem - Rie | Yvelines | 2023 | 94 |
| Apex Energies | Hérault | 2025 | 93 |
| Securitec Incendie | Ille-et-Vilaine | 2025 | 93 |
| Cegelec Dauphine | Isère | 2022 | 93 |
| Cegelec Energie Centre Est | Rhône | 2025 | 93 |
| Dalkia Electrotechnics Holding | Hauts-de-Seine | 2025 | 93 |
| Cegelec Loire Auvergne | Puy-de-Dôme | 2025 | 92 |
| Parera Services | Gers | 2025 | 92 |
| Snef Power Services | Bouches-du-Rhône | 2025 | 92 |
| Auvergne Productique Ingenierie | Puy-de-Dôme | 2025 | 91 |
| Enfrasys | Rhône | 2025 | 91 |
| Ipelec | Seine-Maritime | 2025 | 91 |
| Cegelec Paris | Essonne | 2021 | 90 |
| Engie My Power | Hauts-de-Seine | 2024 | 90 |
| Groupe Snef | Bouches-du-Rhône | 2024 | 90 |
| Entreprise Demouselle | Somme | 2020 | 89 |
| Systeme de Securite Incendie Service | Essonne | 2025 | 89 |
| Santerne Ile de France | Hauts-de-Seine | 2025 | 89 |
| Btb Genie Electrique & Services | Essonne | 2025 | 89 |
| Spie Building Solutions | Seine-Saint-Denis | 2025 | 89 |
| Gtie Infi | Hauts-de-Seine | 2025 | 89 |
| Industheo | Loiret | 2022 | 89 |
| France Solar | Bas-Rhin | 2023 | 89 |
| Cegelec Oil & Gas | Seine-Saint-Denis | 2025 | 89 |
| Cegelec Franche-comte | Doubs | 2024 | 89 |
| Spie Facilities | Seine-Saint-Denis | 2025 | 89 |
| Ineo | Hauts-de-Seine | 2025 | 89 |
| Eiffage Energie Systemes - Clemessy | Haut-Rhin | 2025 | 89 |
| Entreprise D'electricite de Picardie | Somme | 2019 | 88 |
| Nedap France | Val-d'Oise | 2025 | 88 |
| Aecf | Gironde | 2024 | 88 |
| Sdel Sud Ouest Industrie | Pyrénées-Atlantiques | 2025 | 87 |
| Constructel Constructions Telecommunica. | Drôme | 2025 | 87 |
| Santerne Nord Tertiaire | Pas-de-Calais | 2025 | 87 |
| P C E Services | Loire | 2024 | 87 |
| Ouest Maintenance Service | Ille-et-Vilaine | 2025 | 87 |
| Cegelec Haute Normandie | Seine-Maritime | 2025 | 87 |
| Cegelec Industrie Sud Est | Bouches-du-Rhône | 2025 | 87 |
| Cegelec Toulouse | Haute-Garonne | 2025 | 87 |
| Snef | Bouches-du-Rhône | 2025 | 86 |
| Cegelec Centre Est Tertiaire Sas | Ain | 2019 | 86 |
| Coraso | Gironde | 2025 | 86 |
| Santerne Nord Telecoms | Pas-de-Calais | 2021 | 86 |
| Comsip | Seine-Saint-Denis | 2021 | 86 |
| Masselin Energie | Calvados | 2019 | 85 |
| Integral Systeme | Seine-et-Marne | 2025 | 85 |
| Garczynski Traploir | Sarthe | 2025 | 85 |
| Roiret Services | Rhône | 2025 | 85 |
| Cegelec Mobility | Rhône | 2025 | 85 |
| Cegelec Bordeaux | Gironde | 2022 | 84 |
| Eiffage Energie Systemes - Reseau Mobile | Bouches-du-Rhône | 2025 | 84 |
| Cegelec Renewable Energies | Haute-Garonne | 2025 | 83 |
| Fayat Energie Services | Essonne | 2025 | 83 |
| Sdel Elexa | Hauts-de-Seine | 2023 | 82 |
| Societe de Travaux Electriques du Bugey | Rhône | 2024 | 82 |
| Electricite Industrielle J. P. Fauche | Tarn-et-Garonne | 2025 | 81 |
| Semeru | Val-de-Marne | 2025 | 81 |
| Sdel Val de Seine | Seine-Maritime | 2021 | 81 |
| Est Maintenance Service | Moselle | 2025 | 81 |
| Sovec Entreprises | Bas-Rhin | 2021 | 80 |
| Sdel Video Telecom | Seine-Saint-Denis | 2023 | 80 |
| Phibor Entreprises | Val-de-Marne | 2025 | 80 |
| Agiscom Services | Seine-et-Marne | 2025 | 80 |
| Electricite Industrielle de L'est | Haut-Rhin | 2025 | 80 |
| Amplitel | Seine-Saint-Denis | 2022 | 79 |
| Satelec | Essonne | 2025 | 79 |
| Seine Normandie Maintenance Service | Calvados | 2025 | 78 |
| Spie Nucleaire | Val-d'Oise | 2025 | 78 |
| Ensio Sas | Yvelines | 2025 | 77 |
| Isdel Energy | Rhône | 2025 | 77 |
| Gtie Telecoms | Essonne | 2023 | 76 |
| Eri | Val-de-Marne | 2025 | 76 |
| Cegelec Defense | Haute-Garonne | 2025 | 74 |
| Cegelec Nord Industrie | Nord | 2025 | 74 |
| Cide Elec | Essonne | 2025 | 73 |
| Santerne Centre Est Energies | Loire | 2019 | 73 |
| Sdel Infi | Hauts-de-Seine | 2025 | 72 |
| Cegelec Missenard | Hauts-de-Seine | 2022 | 72 |
| Dauphine Savoie Maintenance Services | Isère | 2024 | 71 |
| Cegelec Portes de Bretagne | Ille-et-Vilaine | 2023 | 70 |
| Bentin Sas | Seine-Saint-Denis | 2024 | 69 |
| Eite - Strasser | Doubs | 2023 | 69 |
| Spie Batignolles Energie | Hauts-de-Seine | 2025 | 65 |
| Roiret Energies | Rhône | 2020 | 61 |
| Derichebourg Energie E.p. | Val-de-Marne | 2019 | 61 |
| Ami2s | Yvelines | 2019 | 54 |
| Societe Henri | Val-de-Marne | 2025 | 53 |
| Luminem | Rhône | 2019 | 47 |