Best Energy Companies in Romania
The 81 best Energy companies in Romania in 2026, ranked by funding and momentum. Funding, investors, founders, valuation, tech stack and live signals. Top: Expert Petroleum.
- International grid edge study reveals countries needs and readiness f
Our analysis of 441 Energy companies
$135.1b in tracked funding; 76% of the stack-profiled cohort runs cloud-native; funding activity peaked in 2025.
Ranked: Best Energy companies in Romania
| # | Company | Disclosed funding | Last round | Stage | Founder | Founded | Tech stack | Recent signals |
|---|---|---|---|---|---|---|---|---|
| 1 | Expert Petroleum Provider of oil and gas field production enhancement and decarbonization services | $25M | 109 mo ago | Acquired | — | 2004 | — | — |
| 2 | Nuclearelectrica Production of thermal and nuclear energy | — | 29 mo ago | Funding Raised | Cosmin Ghita CEO | 1998 | WordPressMySQLPHP+21 | 2 partnerships |
| 3 | Romgaz Provider of natural gas exploration, production, and storage services | — | 30 mo ago | Public | — | 1909 | DrupalPHPBootstrap+11 | 1 award |
| 4 | Eplus Developer of electrical transmission and distribution equipment | — | 49 mo ago | Seed | — | 2018 | WordPress Block EditorElementorWordPress+19 | — |
| 5 | Transelectrica Provider of electricity operations management services | — | 56 mo ago | Funding Raised | — | 2000 | LiferayJavaRaphael+6 | — |
| 6 | OMV Petrom Provider of oil & gas exploration and refining services | — | 61 mo ago | Funding Raised | Mahek shaikh Founder | 1956 | WordPressMySQLPHP+19 | — |
| 7 | Black Sea Oil & Gas Developer of natural gas and green energy projects | — | 102 mo ago | Acquired | — | 2015 | WordPressMySQLPHP+13 | — |
| 8 | Transgaz Provider of natural gas transportation services | — | 119 mo ago | Public | — | 2000 | Cart FunctionalityDrupalPHP+7 | — |
Top 8 Energy companies in Romania
#1
Acquired · Bucharest, Bucharest · founded 2004 · 203 employees$25Mraised▾
Provider of oil and gas field production enhancement and decarbonization services. It offers technology and investment to boost production and reserves in mature oil and gas assets. Additionally, it provides field-proven solutions to reduce the environmental footprint of upstream operations. These services aim to maximize the potential and sustainability of mature oil and gas assets.
#2
Funding Raised · Bucharest, Bucharest · founded 1998—raised▾
Nuclearelectrica is a Romanian company that is specialized in the production of thermal and nuclear fuels. Also, they offer project development services for nuclear reactor units across Romania. The company claims to have established its first reactor unit in 1985 and addition of fuel channels to this reactor was completed by 1989 at Cernavoda. They have established second rector unit through a signed contract with AECL. Ansaldo Energia which has a nominal capacity of 700MW power.
#3
Public · Medias, Sibiu · founded 1909 · 5944 employees—raised▾
Provider of natural gas exploration, production, and storage services. This company engages in geological exploration to discover new gas fields, produces methane gas from existing reserves, and provides underground natural gas storage. It also performs maintenance and specialized operations at wells and offers technological transport services. The company is listed on a stock exchange.
#4
Seed · Bucharest, Bucharest · founded 2018 · 529 employees—raised▾
Provider of energy management services intended for reading electricity and gas meters, analyzing and streamlining data, and implementing smart metering projects. The company offers management of energy consumption complemented by industrial process automation, digitization services, and alternatives for increasing energy efficiency for all types of customers, thereby encouraging environmental protection and sustainability.
#5
Funding Raised · Bucharest, Bucharest · founded 2000 · 2872 employees—raised▾
Provider of electricity operations management services
#6
Funding Raised · Bucharest, Bucharest · founded 1956 · 7735 employees—raised▾
Provider of oil & gas exploration and refining services
#7
Acquired · Bucharest, Bucharest · founded 2015 · 100 employees—raised▾
Developer of natural gas and green energy projects. It focuses on developing natural gas resources and establishing green energy initiatives, primarily in biomethane production. The company also pursues offshore gas prospects and facilitates third-party connections to existing infrastructure. Its commitment extends to building vital energy infrastructure and providing a roadmap for future energy developments.
#8
Public · Medias, Sibiu · founded 2000 · 4030 employees—raised▾
Provider of natural gas transportation services. It operates a national transportation system, ensuring quality, safety, economic efficiency, and environmental protection. The company offers services including internal and international natural gas transport, system interconnection, and research and development. It also provides capacity allocation mechanisms, transport tariffs, and related activities. The company manages infrastructure, maintains the system, and adheres to technical standards. It engages in international cooperation and publishes operational and transparency information.
Funding & investor landscape
Market landscape — 10 sub-themes by coverage
Share of Energy coverage by sub-theme.
Regulatory-risk over time rising
Funding & growth over time
funding rising · growth rising
How research on Grid Energy Storage is moving in Romania
A read on the academic research around Grid Energy Storage — which themes are gaining ground, the institutions and researchers driving them, and how the tone is shifting. Based on 390 Romania-affiliated papers.
- Ministry of Education193
- Universitatea Națională de Știință și Tehnologie Politehnica București53
- Technical University of Cluj-Napoca25
- Gheorghe Asachi Technical University of Iași17
- National Research Council15
- Battery (electricity)1→24
- Electrochemistry1→18
- Electrode1→13
- Graphene1→6
- Microgrid1→19
- Supercapacitor1→12
- Cathode1→12
- Electrochemistry1→12
- Electrolyte1→9
- Nanotechnology1→4
Where energy storage is researched across Romania
Location clusters by institution affiliation — each city's volume, stance tone, and a quick read on its hot topic, what's advancing, the opening opportunity, and the main concern.
Common questions
Rohit lives in the feed. He covers what's moving right now — the funding rounds, launches and shifts breaking across the trade press — and ties them back to where the sector is heading.