| 1 | ELECTROGRUP SA | Municipiul Cluj-Napoca | Cluj | 1.3 bn | 675 |
| 2 | AJ BRAND - S.R.L. | Bucureşti Sectorul 4 | Bucureşti | 598.8 m | 298 |
| 3 | ELEKTRA INVEST SRL | Bucureşti Sectorul 2 | Bucureşti | 517.7 m | 168 |
| 4 | TIAB SA | Bucureşti Sectorul 1 | Bucureşti | 429.2 m | 784 |
| 5 | LOIAL IMPEX SRL | Sat Şcheia, Comuna Şcheia | Suceava | 296.9 m | 263 |
| 6 | GENERAL ME.EL ELECTRIC S.R.L. | Loc. Băicoi, Oraş Băicoi | Prahova | 257.5 m | 180 |
| 7 | UTI CONSTRUCTION AND FACILITY MANAGEMENT S.A. | Oraş Otopeni | Ilfov | 249.3 m | 660 |
| 8 | BIT INVEST SRL | Municipiul Târgovişte | Dâmboviţa | 222.0 m | 220 |
| 9 | PRELCHIM SRL | Municipiul Râmnicu Vâlcea | Vâlcea | 185.8 m | 123 |
| 10 | ELECTROCONS GROUP PROIECT INTL SRL | Bucureşti Sectorul 3 | Bucureşti | 178.6 m | 127 |
| 11 | FLASH LIGHTING SERVICES SA | Bucureşti Sectorul 2 | Bucureşti | 161.3 m | 165 |
| 12 | LUXTEN LIGHTING COMPANY SA | Municipiul Timişoara | Timiş | 157.9 m | 205 |
| 13 | LSG BUILDING SOLUTIONS SRL | Bucureşti Sectorul 5 | Bucureşti | 157.2 m | 65 |
| 14 | ELECTRO-SERVICE DISTRIBUŢIE SRL | Bucureşti Sectorul 3 | Bucureşti | 150.8 m | 107 |
| 15 | SIMCO INTERNATIONAL IMPEX SRL | Bucureşti Sectorul 4 | Bucureşti | 146.2 m | 64 |
| 16 | MEGA POWER ENERGY SRL | Sat Isvoarele, Comuna Isvoarele | Giurgiu | 113.3 m | 65 |
| 17 | ROMSIR-IMPEX SRL | Loc. Balş, Oraş Balş | Olt | 111.6 m | 13 |
| 18 | REINVENT ENERGY SRL | Bucureşti Sectorul 3 | Bucureşti | 111.2 m | 144 |
| 19 | INOCOM BIZ SRL | Sat Şendreni, Comuna Şendreni | Galaţi | 106.2 m | 36 |
| 20 | SPOTING SA | Sat Strejnicu, Comuna Târgşoru Vechi | Prahova | 101.8 m | 239 |
| 21 | GREENCELLS CEE SRL | Bucureşti Sectorul 2 | Bucureşti | 101.3 m | 256 |
| 22 | ELBI ENERGY PROJECTS S.R.L. | Bucureşti Sectorul 5 | Bucureşti | 100.9 m | 23 |
| 23 | GENERAL SECURITY SRL | Municipiul Cluj-Napoca | Cluj | 98.8 m | 133 |
| 24 | CONVERGINT ROMANIA S.R.L. | Bucureşti Sectorul 1 | Bucureşti | 98.1 m | 167 |
| 25 | TRIPOL SISTEM CONSTRUCT S.R.L. | Municipiul Buzău | Buzău | 95.3 m | 98 |
| 26 | CIVITAS SYSTEMS SRL | Municipiul Craiova | Dolj | 90.9 m | 80 |
| 27 | ELECTRO MAT PROMPT SRL | Sat Onceşti, Comuna Onceşti | Maramureş | 88.5 m | 126 |
| 28 | GENERAL ELECTRO PROEXIM SRL | Bucureşti Sectorul 1 | Bucureşti | 86.1 m | 77 |
| 29 | DATACOR SRL | Loc. Viişoara, Municipiul Bistriţa | Bistriţa-Năsăud | 85.5 m | 165 |
| 30 | SMART EST PROIECT SRL | Municipiul Focşani | Vrancea | 84.7 m | 52 |
| 31 | VERTATEL INTERNATIONAL S.R.L. | Bucureşti Sectorul 4 | Bucureşti | 81.3 m | 343 |
| 32 | PET COMMUNICATIONS SRL | Municipiul Constanţa | Constanţa | 80.6 m | 112 |
| 33 | ELMAROM GRUP SRL | Bucureşti Sectorul 2 | Bucureşti | 80.6 m | 101 |
| 34 | ELECTRO GRUP SRL | Municipiul Zalău | Sălaj | 80.5 m | 51 |
| 35 | BK TECHNIK SRL | Bucureşti Sectorul 1 | Bucureşti | 79.5 m | 222 |
| 36 | ELECTROAXA SRL | Loc. Dolhasca, Oraş Dolhasca | Suceava | 77.9 m | 26 |
| 37 | INVEST SERVICII COMERCIALE SRL | Municipiul Dej | Cluj | 72.6 m | 106 |
| 38 | ELTEK INTEGRATE ROMANIA - S.R.L. | Oraş Voluntari | Ilfov | 70.3 m | 162 |
| 39 | ELBIM GRUPSERV SRL | Municipiul Oneşti | Bacău | 69.7 m | 51 |
| 40 | EC SYSTEMS S.R.L. | Bucureşti Sectorul 6 | Bucureşti | 68.0 m | 11 |
| 41 | GREENTECH PROFESSIONALS S.R.L. | Bucureşti Sectorul 1 | Bucureşti | 64.4 m | 98 |
| 42 | VELTOL HOLDING SRL | Municipiul Târgu Mureş | Mureş | 59.4 m | 48 |
| 43 | EMSENS PROD SRL | Municipiul Baia Mare | Maramureş | 58.6 m | 35 |
| 44 | MULTIPROD ENERGO SRL | Municipiul Buzău | Buzău | 58.0 m | 96 |
| 45 | CARBON HEAT SOLUTIONS SRL | Bucureşti Sectorul 4 | Bucureşti | 57.4 m | 46 |
| 46 | VOLTA X SOLAR SYSTEMS S.R.L. | Municipiul Piatra Neamţ | Neamţ | 57.3 m | 94 |
| 47 | PASIROM INTERNAŢIONAL SRL | Municipiul Tulcea | Tulcea | 55.6 m | 4 |
| 48 | KESZ ELECTRIC SRL | Municipiul Cluj-Napoca | Cluj | 55.5 m | 27 |
| 49 | IMSAT-CUADRIPOL SA | Municipiul Braşov | Braşov | 53.4 m | 144 |
| 50 | CONS ELECTRIFICAREA INSTAL SRL | Municipiul Timişoara | Timiş | 53.4 m | 117 |
| 51 | ELTREX SRL | Municipiul Timişoara | Timiş | 51.6 m | 92 |
| 52 | AFCON POWER & CONTROL SA | Bucureşti Sectorul 1 | Bucureşti | 51.4 m | 39 |
| 53 | IMSAT SERVICE CLUJ SA | Municipiul Cluj-Napoca | Cluj | 50.9 m | 61 |
| 54 | TQM SERVICES SRL | Municipiul Călăraşi | Călăraşi | 50.7 m | 90 |
| 55 | MODERN POWER SYSTEMS SRL | Municipiul Cluj-Napoca | Cluj | 50.2 m | — |
| 56 | ELNET INSTAL SRL | Bucureşti Sectorul 6 | Bucureşti | 50.2 m | 38 |
| 57 | ORIZONT ELECTRIC S.R.L. | Municipiul Zalău | Sălaj | 49.9 m | 24 |
| 58 | BEP LIGHT ENERGY SRL | Sat Ghermăneşti, Comuna Snagov | Ilfov | 49.8 m | 36 |
| 59 | VONREP SRL | Municipiul Târgu Jiu | Gorj | 49.5 m | 26 |
| 60 | ASTRAEA SMARTSERV S.R.L. | Municipiul Braşov | Braşov | 48.8 m | 15 |
| 61 | VALORIS SRL | Municipiul Râmnicu Vâlcea | Vâlcea | 48.2 m | 52 |
| 62 | E.G.M.S. ELECTRO MONTAJ SI SERVICE SRL | Bucureşti Sectorul 6 | Bucureşti | 47.7 m | 71 |
| 63 | ICCO SMART SOLUTIONS S.R.L. | Oraş Ghimbav | Braşov | 47.3 m | 144 |
| 64 | AMBITO S.R.L. | Bucureşti Sectorul 1 | Bucureşti | 47.1 m | 85 |
| 65 | STIL ELECTRO MAX SRL | Municipiul Oradea | Bihor | 46.6 m | 3 |
| 66 | ANDREM STRATEGY S.R.L. | Bucureşti Sectorul 1 | Bucureşti | 46.2 m | 322 |
| 67 | NEOTRONIX SRL | Bucureşti Sectorul 3 | Bucureşti | 45.7 m | 76 |
| 68 | A.E.G. INTERNATIONAL SERVICII S.R.L. | Bucureşti Sectorul 3 | Bucureşti | 45.2 m | 58 |
| 69 | ANCONI M & E GROUP SRL | Bucureşti Sectorul 2 | Bucureşti | 45.0 m | 27 |
| 70 | ENERGO POWER SRL | Municipiul Cluj-Napoca | Cluj | 44.2 m | 36 |
| 71 | PANEL VOLT SOLAR S.R.L. | Municipiul Adjud | Vrancea | 44.0 m | 8 |
| 72 | ELECTROCONSTRUCTIA ELCO GIURGIU SA | Municipiul Giurgiu | Giurgiu | 43.8 m | 87 |
| 73 | PROINSTAL SRL | Municipiul Călăraşi | Călăraşi | 41.9 m | 54 |
| 74 | ELECTRIC LIGHT SRL | Sat Vârteşcoiu, Comuna Vârteşcoiu | Vrancea | 41.6 m | 43 |
| 75 | GENERAL TEHNIC SRL | Municipiul Iaşi | Iaşi | 41.3 m | 65 |
| 76 | J.T.S INSTAL CONSTRUCT S.R.L. | Sat Borleşti, Comuna Merişani | Argeş | 40.9 m | 32 |
| 77 | FOCUS SECURITY SYSTEMS S.R.L. | Sat Dudu, Comuna Chiajna | Ilfov | 40.1 m | 58 |
| 78 | ELECTROINSTAL SOLUTION SRL | Bucureşti Sectorul 2 | Bucureşti | 40.0 m | 53 |
| 79 | SCM ATI ELECTRIC SRL | Bucureşti Sectorul 5 | Bucureşti | 39.8 m | 19 |
| 80 | CON-A MEP S.R.L. | Sat Şelimbăr, Comuna Şelimbăr | Sibiu | 39.6 m | 71 |
| 81 | ELCOMEX-I.E.A. SA | Loc. Cernavodă, Oraş Cernavodă | Constanţa | 39.4 m | 262 |
| 82 | ELECTRO ENERGETICA SRL | Municipiul Cluj-Napoca | Cluj | 39.3 m | 43 |
| 83 | HARD INSTAL CONSULTING SRL | Loc. Voluntari, Oraş Voluntari | Ilfov | 39.3 m | 81 |
| 84 | MRB ELECTRIC SRL | Municipiul Cluj-Napoca | Cluj | 38.1 m | 58 |
| 85 | ELECTRIC INVESTMENT PH SRL | Municipiul Cluj-Napoca | Cluj | 38.0 m | 20 |
| 86 | CONELECTRO SERVICE SRL | Bucureşti Sectorul 6 | Bucureşti | 37.9 m | 43 |
| 87 | TEMPOS SERV SRL | Bucureşti Sectorul 2 | Bucureşti | 37.8 m | 41 |
| 88 | SECUNET PROJECT SRL | Bucureşti Sectorul 3 | Bucureşti | 37.6 m | 48 |
| 89 | INSTA GRUP S.A. | Municipiul Târgu Mureş | Mureş | 37.3 m | 56 |
| 90 | MAPAMOND CONS S.R.L. | Sat Glina, Comuna Glina | Ilfov | 37.1 m | 2 |
| 91 | ELECTRIC SERV SRL | Municipiul Sibiu | Sibiu | 36.6 m | 88 |
| 92 | ELCO SRL | Municipiul Craiova | Dolj | 36.6 m | 45 |
| 93 | TREVORA ELECTRIC S.R.L. | Sat Bascov, Comuna Bascov | Argeş | 36.5 m | 33 |
| 94 | ELECTRIC MONTAJ SRL | Municipiul Constanţa | Constanţa | 36.2 m | 37 |
| 95 | RAP INSTAL SRL | Municipiul Braşov | Braşov | 35.7 m | 39 |
| 96 | INNOVA ENGINEERING SRL | Bucureşti Sectorul 1 | Bucureşti | 35.5 m | 55 |
| 97 | PGV ALERT CONCEPT SRL | Sat Vişeu de Jos, Comuna Vişeu de Jos | Maramureş | 35.5 m | 19 |
| 98 | SANEL SRL | Loc. Rupea, Oraş Rupea | Braşov | 34.9 m | 63 |
| 99 | ALBACO EXIM SRL | Loc. Oarda, Municipiul Alba Iulia | Alba | 34.8 m | 58 |
| 100 | EL - MONT SRL | Bucureşti Sectorul 1 | Bucureşti | 34.7 m | 35 |