Company lists · Data refreshed September 2026
Top 13 Green energy investment firms based in Romania
RevenueBase identified 44 green energy investment firms headquartered in Romania as of September 2026 and tracks 844 professional contacts across them, including 446 with verified work emails and 18 with mobile numbers. Bucharest is the largest hub.
This list covers green energy investment firms headquartered in Romania, matched on what each company actually does as described in its own words. Ranked by team size, largest first. Every row shows the company's own description, how directly it supports the match, and when it was last checked. Data refreshed September 3, 2026.
Published by RevenueBase, a B2B data infrastructure company. This list was built with RevenueBase SmartSearch, the natural-language company search RevenueBase customers use to build their own targeted lists and unlock verified emails and direct dials at the companies on them. How these lists are built and judged.
The 13 largest green energy investment firms based in Romania
Ranked by team size| # | Company | Contacts | |||
|---|---|---|---|---|---|
| 1 | 53 | ||||
“The goal of AJ BRAND is to provide sustainable and renewable energy solutions.” Source: company website · checked Sep 3, 2026Thanks. The Data Team will review it. | |||||
| 2 | 49 | ||||
“Restart Energy este o companie din prima linie în domeniul energiei care deține capital mixt româno-american.” Source: company website · checked Sep 3, 2026Thanks. The Data Team will review it. | |||||
| 3 | WIRENPartial evidence | 43 | |||
“Wiren's mission is to reshape the energy landscape by making sustainable energy universally accessible.” Source: company website · checked Sep 3, 2026Thanks. The Data Team will review it. | |||||
| 4 | 24 | ||||
“Monsson is the first company established within Monsson Group, a group that has been leading the way in renewable energy for over 15 years.” Source: company website · checked Sep 3, 2026Thanks. The Data Team will review it. | |||||
| 5 | 22 | ||||
“Market Leader in State Aid for Green Energy & BESS Projects in Romania.” Source: company website · checked Sep 3, 2026Thanks. The Data Team will review it. | |||||
| 6 | StratosparkPartial evidence | 20 | |||
“StratoSpark face parte din grupul de companii Stratos, cu o experiență vastă în domeniul mediului, și oferă proiecte ecologice ce furnizează energie verde, așa cum sunt sistemele…” Source: company website · checked Sep 3, 2026Thanks. The Data Team will review it. | |||||
| 7 | 8 | ||||
“4P Renewables is a developer and asset manager of industrial scale renewable energy projects.” Source: company website · checked Sep 3, 2026Thanks. The Data Team will review it. | |||||
| 8 | 8 | ||||
“Expert in providing sustainable green energy solutions and comprehensive maintenance services.” Source: company website · checked Sep 3, 2026Thanks. The Data Team will review it. | |||||
| 9 | 7 | ||||
“Despre noi PROIECT RO INVEST CAPITAL SRL este un lider cu peste un deceniu de expertiză în consultanță pentru proiecte de energie regenerabilă, finanțate din fonduri europene.” Source: company website · checked Sep 3, 2026Thanks. The Data Team will review it. | |||||
| 10 | 6 | ||||
“Founded in 2003, Aquarius Grup actively began trading as a standalone unit in early 2005 and developed briskly leading to the later establishment of Aquarius Developments and…” Source: company website · checked Sep 3, 2026Thanks. The Data Team will review it. | |||||
| 11 | 4 | ||||
“Our company is committed to providing sustainable solutions for both the production of electrical energy and the marketing of eco-friendly vehicles.” Source: company website · checked Sep 3, 2026Thanks. The Data Team will review it. | |||||
| 12 | 2 | ||||
“ECONOUS, with branch offices in Athens, Thessaloniki and Bucharest, is a specialized asset management, private equity and acquisition advisory firm with a primary focus on the…” Source: company website · checked Sep 3, 2026Thanks. The Data Team will review it. | |||||
| 13 | 2 | ||||
“SE-GES is a Romanian company, fully owned by Balkan Accession Fund (BAF), able to offer the best financial, operational and environmental benefits available on the market related…” Source: company website · checked Sep 3, 2026Thanks. The Data Team will review it. | |||||
Showing 13 of 44 green energy investment firms based in Romania
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Green energy investment firms based in Romania at a glance
As of Sep 3, 2026Companies by employee count
Verified emails by last verification
How this list was built
Company categories are rarely black and white. RevenueBase reads each company's own description of its business to decide whether it belongs among green energy investment firms, so some rows will be adjacent to the category rather than pure plays. The description and evidence rating on every row are there so you can check each match yourself.
- Source
- The RevenueBase company graph: 60 million companies and 398.9 million professional contacts resolved from primary sources, queried with RevenueBase SmartSearch, the natural-language company search available to every RevenueBase user.
- What qualifies
- Companies headquartered in Romania whose own description of what they do matches “green energy investment firms”. Matching reads each company's description, not its industry code or its name.
- What we exclude
- Companies whose own description does not clearly place them among green energy investment firms, and records with no verified work email. Companies headquartered outside Romania are excluded even when they keep an office there.
- Match quality
- In blind human judging of this matching method, 86% of matched companies were on target. Expect roughly 1 in 7 rows to be adjacent to the category rather than a pure play. Every row shows the company's own description and an evidence rating so you can judge each match yourself. Read the full methodology: how the lists are built, how the judging worked, and what the figure means.
- Ranking
- Team size, largest first: companies are ordered by the number of professionals RevenueBase tracks at each one. Employee ranges shown are reported bands, for context.
- Verification
- Every listed company carries at least one verified work email, 446 across the full list. Contacts re-verify on a rolling cadence, and each contact's own verification date is shown inside RevenueBase.
- Refresh
- This page's figures were pulled from the company graph on September 3, 2026. Lists refresh periodically as the graph is re-checked.
- Corrections
- Wrong category, wrong headquarters, or a company that has closed? Use “Report an issue” on any row. Reports go to the RevenueBase Data Team and feed back into the company graph.
Frequently asked
How many green energy investment firms are there based in Romania?
RevenueBase identified 44 green energy investment firms headquartered in Romania as of September 2026, matched on each company's own description of what it does rather than its industry code.
What is the largest company on this list?
AJ Brand, headquartered in Bucharest, tops this list with the largest team on record.
Which city has the most green energy investment firms?
Bucharest leads with 23 headquartered companies, followed by Constanta (2) and Bucuresti (2).
How do I get contact information for these companies?
A free RevenueBase account lets you run this exact search and work the top results, verified emails and direct dials included. Upgrading unlocks all 446 verified decision-maker contacts tracked across these 44 companies.
How current is this list?
The list refreshes periodically as the company graph is re-checked. This page's figures were pulled on September 3, 2026.
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About this data
RevenueBase is a B2B data infrastructure company. Its company graph covers 60 million companies and 398.9 million professional contacts, with emails verified on a rolling cadence rather than scraped once and left to decay. These company lists are generated directly from that graph with RevenueBase SmartSearch, the same natural-language company search every RevenueBase user has: describe a market in plain words, get the companies that match, and add verified emails and direct dials for the people at them. It is the same data that powers RevenueBase's B2B data products, and a free account includes 500 credits to start. How these lists are built and judged.
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