| 1 | ROMGAZ BLACK SEA LIMITED NASSAU (BAHAMAS) SUCURSALA BUCURESTI | Bucureşti Sectorul 1 | Bucureşti | 433.5 mil | 15 |
| 2 | ROMPETROL RAFINARE SA | Loc. Năvodari, Oraş Năvodari | Constanţa | 268.7 mil | 1.106 |
| 3 | LUKOIL OVERSEAS ATASH B.V., AMSTERDAM, OLANDA SUCURSALA BUCURESTI | Bucureşti Sectorul 1 | Bucureşti | 90.0 mil | 10 |
| 4 | AMROMCO ENERGY SRL | Municipiul Ploieşti | Prahova | 16.6 mil | 120 |
| 5 | ENDURANCE LIFT SOLUTIONS INTERNATIONAL S.R.L. | Sat Negoieşti, Comuna Brazi | Prahova | 10.5 mil | 98 |
| 6 | MICHAEL OIL&GAS SERVICES SRL | Sat Lipăneşti, Comuna Lipăneşti | Prahova | 5.9 mil | 34 |
| 7 | STRATUM ENERGY ROMANIA LTD (NICOSIA SUCURSALA BUCURESTI) | Bucureşti Sectorul 1 | Bucureşti | 5.8 mil | 52 |
| 8 | AKCG INTERNAȚIONAL ZONE S.R.L. | Sat Dobroeşti, Comuna Dobroeşti | Ilfov | 4.2 mil | 1 |
| 9 | PREMIER ENERGY TRADING S.R.L. | Bucureşti Sectorul 1 | Bucureşti | 4.1 mil | 9 |
| 10 | IVONCO TRADE SRL | Bucureşti Sectorul 2 | Bucureşti | 3.4 mil | 17 |
| 11 | PRODUCTION SOLUTIONS INTERNATIONAL ROMANIA S.R.L. | Bucureşti Sectorul 1 | Bucureşti | 2.7 mil | 0 |
| 12 | RTIME-GS SRL | Municipiul Bacău | Bacău | 2.7 mil | 5 |
| 13 | CONSTEHNO AL SRL | Municipiul Ploieşti | Prahova | 2.5 mil | 5 |
| 14 | CONSTEHNO WELL MANAGEMENT S.R.L. | Municipiul Ploieşti | Prahova | 2.5 mil | 3 |
| 15 | ENIT DOWNSTREAM SRL | Loc. Boldeşti-Scăeni, Oraş Boldeşti-Scăeni | Prahova | 1.9 mil | 17 |
| 16 | TIM-ICE COMPANY SRL | Municipiul Timişoara | Timiş | 1.4 mil | 7 |
| 17 | EVDANCO OGC SRL | Municipiul Târgovişte | Dâmboviţa | 1.2 mil | 12 |
| 18 | NAVARA TRANS ARGO SRL | Sat Ciolpani, Comuna Ciolpani | Ilfov | 1.0 mil | 3 |
| 19 | SPENCO SRL | Loc. Zărneşti, Oraş Zărneşti | Braşov | 845.3 mii | 2 |
| 20 | UTILITAR FLUID CONSTRUCT SRL | Sat Dezmir, Comuna Apahida | Cluj | 795.7 mii | 12 |
| 21 | AB DRILL S.R.L. | Municipiul Cluj-Napoca | Cluj | 684.1 mii | 1 |
| 22 | ASCO GLOBAL SOLUTIONS S.R.L. | Bucureşti Sectorul 5 | Bucureşti | 527.2 mii | 4 |
| 23 | QUICK DRILL S.R.L. | Municipiul Cluj-Napoca | Cluj | 489.2 mii | 2 |
| 24 | EUREKA CONSULTING ENGINEERS SRL | Bucureşti Sectorul 1 | Bucureşti | 434.1 mii | 3 |
| 25 | PADO GROUP INFRASTRUCTURES SRL | Municipiul Târgu Mureş | Mureş | 406.1 mii | 8 |
| 26 | QHZ SERVERS HOSTING S.R.L. | Bucureşti Sectorul 6 | Bucureşti | 379.2 mii | 1 |
| 27 | INA DRILLING S.R.L. | Sat Cordun, Comuna Cordun | Neamţ | 368.7 mii | 3 |
| 28 | AP INTERTEK SOLUTIONS SRL | Bucureşti Sectorul 2 | Bucureşti | 367.8 mii | 2 |
| 29 | EXPERT PETROLEUM SRL | Bucureşti Sectorul 1 | Bucureşti | 317.8 mii | 270 |
| 30 | BOLT POWER ROMANIA SRL | Bucureşti Sectorul 1 | Bucureşti | 198.3 mii | 23 |
| 31 | GREAT WESTERN GROUP S.R.L. | Sat Chişoda, Comuna Giroc | Timiş | 140.2 mii | 4 |
| 32 | ALPHA ENERGY OPERATIONS S.R.L. | Bucureşti Sectorul 2 | Bucureşti | 114.5 mii | 0 |
| 33 | JULIAN BLACK GOLD COMPANY S.R.L. | Bucureşti Sectorul 1 | Bucureşti | 85.9 mii | 1 |
| 34 | DRILLING EQUIPMENT SRL | Municipiul Zalău | Sălaj | 83.6 mii | 17 |
| 35 | ROCKWELL SERVICES S.R.L. | Sat Blejoi, Comuna Blejoi | Prahova | 65.8 mii | 8 |
| 36 | XCD SRL | Municipiul Târgu Mureş | Mureş | 37.7 mii | 7 |
| 37 | HASEL INDUSTRIAL SRL | Sat Valea Călugărească, Comuna Valea Călugărească | Prahova | 31.5 mii | 2 |
| 38 | FBM INNOVATIVE SERVICES SRL | Bucureşti Sectorul 1 | Bucureşti | 28.2 mii | 2 |
| 39 | GEOLINK SRL | Municipiul Timişoara | Timiş | 19.3 mii | 13 |
| 40 | PRIME CHEMICALS S.R.L. | Bucureşti Sectorul 1 | Bucureşti | 18.9 mii | 0 |
| 41 | RG ENERGY TECHNOLOGIES S.R.L. | Bucureşti Sectorul 1 | Bucureşti | 9.3 mii | 0 |
| 42 | CREAPOLIS SRL | Municipiul Timişoara | Timiş | 1.7 mii | 1 |
| 43 | AMRO GOLD OIL SRL | Municipiul Timişoara | Timiş | 0 | 0 |
| 44 | CLARA PETROLEUM SRL | Municipiul Câmpina | Prahova | 0 | 0 |
| 45 | DRILLING MD EXPERT SRL | Loc. Târgu Neamţ, Oraş Târgu Neamţ | Neamţ | 0 | 0 |
| 46 | HOR YAZ OIL GAZ S.R.L. | Loc. Videle, Oraş Videle | Teleorman | 0 | 0 |
| 47 | BLACK ROCK CORPORATION S.R.L. | Sat Mintia, Comuna Veţel | Hunedoara | 0 | — |
| 48 | GLOBAL PETROCLEAN TECHNOLOGIES S.R.L. | Bucureşti Sectorul 4 | Bucureşti | 0 | — |
| 49 | MIRSONS BEST METALS S.R.L. | Municipiul Galaţi | Galaţi | -50 | — |
| 50 | PACIFIC ENERGY S.A. | Municipiul Zalău | Sălaj | -13570 | 1 |
| 51 | MIFALEX COM PROD IMPEX SRL | Bucureşti Sectorul 1 | Bucureşti | -16046 | 0 |
| 52 | INTERTRADE MINING S.R.L. | Bucureşti Sectorul 5 | Bucureşti | -16375 | 1 |
| 53 | STRATEGIC RESOURCES SOUTH SRL | Bucureşti Sectorul 1 | Bucureşti | -22965 | 0 |
| 54 | CASPIAN LOGISTICS SOLUTIONS S.R.L. | Bucureşti Sectorul 1 | Bucureşti | -23807 | 0 |
| 55 | I OIL & GAS RESOURCES SRL | Bucureşti Sectorul 2 | Bucureşti | -30794 | 0 |
| 56 | PRIMUS CORP S.R.L. | Municipiul Braşov | Braşov | -55688 | 1 |
| 57 | BRENT OIL CO SRL | Bucureşti Sectorul 2 | Bucureşti | -92551 | 1 |
| 58 | R.E.C. ENERGY CONSULTING SRL | Bucureşti Sectorul 1 | Bucureşti | -105710 | 0 |
| 59 | GREEN LIGHT GRUP SRL | Bucureşti Sectorul 1 | Bucureşti | -131997 | 0 |
| 60 | CENTRAL EUROPEAN DRILLING S.R.L. | Municipiul Ploieşti | Prahova | -134649 | 1 |
| 61 | KARPATHIAN ENERGY DEVELOPMENT AGENCY S.A. | Sat Cornu de Jos, Comuna Cornu | Prahova | -152502 | 2 |
| 62 | LOTUS PETROL SRL | Bucureşti Sectorul 4 | Bucureşti | -189909 | 2 |
| 63 | CDOG SERVICES S.R.L. | Sat Budiu Mic, Comuna Crăciuneşti | Mureş | -262322 | 1 |
| 64 | ZENITH RESOURCES S.R.L. | Bucureşti Sectorul 1 | Bucureşti | -276581 | 2 |
| 65 | ASMACS S.R.L. | Bucureşti Sectorul 1 | Bucureşti | -451781 | 2 |
| 66 | ALPHA METAL OIL AND GAS SRL | Bucureşti Sectorul 2 | Bucureşti | -537100 | 2 |
| 67 | VIKING OILFIELD SERVICES SRL | Municipiul Ploieşti | Prahova | -557141 | 1 |
| 68 | PROSPECTIUNI OIL&GAS S.R.L. | Bucureşti Sectorul 1 | Bucureşti | -706393 | 0 |
| 69 | BRENT EXPLORATION & PRODUCTION SRL | Sat Blejoi, Comuna Blejoi | Prahova | -826912 | 22 |
| 70 | MOL RBS S.R.L. | Municipiul Cluj-Napoca | Cluj | -948414 | 1 |
| 71 | SERINUS ENERGY ROMANIA S.A. | Bucureşti Sectorul 1 | Bucureşti | -1813066 | 13 |
| 72 | ADX ENERGY PANONIA S.R.L. | Oraş Voluntari | Ilfov | -1839410 | 1 |
| 73 | FORAJ SONDE SA | Loc. Videle, Oraş Videle | Teleorman | -9509724 | 351 |
| 74 | ROHRER OIL & GAS SERVICES S.R.L. | Sat Tătărani, Comuna Bărcăneşti | Prahova | -14935620 | 327 |
| 75 | MAZARINE ENERGY ROMANIA SRL | Bucureşti Sectorul 1 | Bucureşti | -20310321 | 160 |
| 76 | NIS PETROL SRL | Bucureşti Sectorul 1 | Bucureşti | -94318575 | 42 |
