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.

How to read this list HQ checked on every row Match evidence on every row Refreshed Sep 3, 2026 86% judged on-target in blind review
44Companies
844Contacts tracked
446Verified emails
18Mobile numbers
Unlock all 44 companies Free signup · no credit card · 500 free credits

The 13 largest green energy investment firms based in Romania

Ranked by team size
Top 13 of 44 green energy investment firms based in Romania, ranked by team size, largest first. Data refreshed Sep 3, 2026. Evidence rates how directly each company's own description names green energy investment firms: strong (names it), partial (names part of it), indirect (matched on its full profile rather than the summary shown). Click a count to unlock that company's people.
#CompanyHeadquartersEmployeesContacts
1
AJ BrandPartial evidence
Bucharest, RomaniaHQ checked Sep 3, 2026501-1,00053

“The goal of AJ BRAND is to provide sustainable and renewable energy solutions.”

Source: company website · checked Sep 3, 2026
2
Restart EnergyPartial evidence
Timisoara Romania, RomaniaHQ checked Sep 3, 202651-20049

“Restart Energy este o companie din prima linie în domeniul energiei care deține capital mixt româno-american.”

Source: company website · checked Sep 3, 2026
3
WIRENPartial evidence
Arad, RomaniaHQ checked Sep 3, 202651-20043

“Wiren's mission is to reshape the energy landscape by making sustainable energy universally accessible.”

Source: company website · checked Sep 3, 2026
4
MonssonPartial evidence
Constanta, RomaniaHQ checked Sep 3, 2026201-50024

“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, 2026
5
TDP PartnersStrong evidence
Bucharest, RomaniaHQ checked Sep 3, 202611-5022

“Market Leader in State Aid for Green Energy & BESS Projects in Romania.”

Source: company website · checked Sep 3, 2026
6
StratosparkPartial evidence
Bucharest, RomaniaHQ checked Sep 3, 202611-5020

“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, 2026
7
4p RenewablesPartial evidence
Bucharest, RomaniaHQ checked Sep 3, 202611-508

“4P Renewables is a developer and asset manager of industrial scale renewable energy projects.”

Source: company website · checked Sep 3, 2026
8
GIS EnergyStrong evidence
Oradea, RomaniaHQ checked Sep 3, 202611-508

“Expert in providing sustainable green energy solutions and comprehensive maintenance services.”

Source: company website · checked Sep 3, 2026
9
Proiect RO Invest CapitalPartial evidence
Bucharest, RomaniaHQ checked Sep 3, 20261-107

“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, 2026
10
Aquarius GrupIndirect evidence
Bucharest, RomaniaHQ checked Sep 3, 202611-506

“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, 2026
11
Gentle ElectricPartial evidence
Ghercesti, RomaniaHQ checked Sep 3, 202651-2004

“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, 2026
12
Econous Green EnergyIndirect evidence
RomaniaHQ checked Sep 3, 202611-502

“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, 2026
13Bucharest, RomaniaHQ checked Sep 3, 202611-502

“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, 2026

Showing 13 of 44 green energy investment firms based in Romania

See the full list, filter by size, metro and specialty, and get verified emails and direct dials for all 446 reachable decision-makers.

Free signup · no credit card

See all 44 companies

Green energy investment firms based in Romania at a glance

As of Sep 3, 2026
11-50Median size (employees)
BucharestLargest hub · 23 HQs
18Contacts with mobile numbers
Sep 3, 2026Data refreshed

Companies by employee count

1-10
14
11-50
20
51-200
7
201-500
2
501-1,000
1

Verified emails by last verification

0–30
0
31–60
34
61–90
266
90–180
141
180+
5

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.

Ready to reach these companies? Verified emails and direct dials for all 44 green energy investment firms based in Romania. Start with a free account, no credit card.

Get the full list

Related lists

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.