Company lists · Data verified August 2026

Top 18 Energy efficiency investment firms based in Belgium

Name: Energy efficiency investment firms based in Belgium
Creator: RevenueBase
License: https://creativecommons.org/licenses/by/4.0/

Compiled by the RevenueBase Data Team Verified Aug 28, 2026 35 companies tracked

There are 35 energy efficiency investment firms headquartered in Belgium (RevenueBase, August 2026). RevenueBase tracks 228 professional contacts across them, including 111 with verified work emails and 3 with mobile numbers. Brussels is the largest hub.

This list covers energy efficiency investment firms headquartered in Belgium, matched on what each company actually does as described in its own words. Ranked by team size, largest first. Data current as of August 28, 2026.

35Companies

228Contacts tracked

111Verified emails

3Mobile numbers

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The 18 largest energy efficiency investment firms based in Belgium

Ranked by team size

Top 18 of 35 energy efficiency investment firms based in Belgium, ranked by team size, largest first. Data verified Aug 28, 2026. Click a count to unlock that company's people.
#	Company	HQ	Employees	Contacts	Verified emails
1	Delpower	n/a	11-50	24	22
2	Ecopuur	Drongen	11-50	23	16
3	Soltis	Evere Brussels	11-50	23	6
4	cozie.be	Genval	51-200	21	1
5	Wattson NV	Ghent	11-50	16	10
6	Dnergy	n/a	11-50	16	9
7	Next DAY Sustainable Holdings	Brussels	11-50	14	7
8	Ensatec	Genk	1-10	12	10
9	Factor4	Antwerp	1-10	9	8
10	Inesco	Bilzen	1-10	9	1
11	Optiwatt Scrl	Wauthier-Braine	1-10	7	6
12	E-Nova	Dour	1-10	7	3
13	Chroma Impact Investment	Mont-Saint-Guibert	1-10	5	3
14	Green Power Future	Kontich	1-10	4	3
15	Energiqa	n/a	1-10	4	1
16	Wise. Energy	n/a	1-10	3	2
17	NRG MAN BV	n/a	11-50	3	1
18	Nrgeek	Rotselaar	1-10	2	2

Showing 18 of 35 energy efficiency investment firms based in Belgium

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Energy efficiency investment firms based in Belgium at a glance

As of Aug 28, 2026

1-10Median size (employees)

BrusselsLargest hub · 3 HQs

3Contacts with mobile numbers

0Emails re-verified in last 30 days

Companies by employee count

1-10

11-50

51-200

Energy efficiency investment firms by metro

Metro	Companies
Energy efficiency investment firms in Brussels	3
Energy efficiency investment firms in Mechelen	2
Energy efficiency investment firms in Viesville Pont-A-Celles	1
Energy efficiency investment firms in Evere Brussels	1
Energy efficiency investment firms in Pietrain	1
Energy efficiency investment firms in Ghent	1
Energy efficiency investment firms in Zonhoven	1

How this list was built

Source: The RevenueBase company graph: 21.3 million companies and 398.9 million professional contacts resolved from primary sources.
Inclusion: Companies whose own business descriptions match “energy efficiency investment firms”, with match quality audited by blind human judging, and headquartered in Belgium.
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: Contact records re-verify on a rolling cadence; 0 contacts on this list were re-verified in the last 30 days.
Refresh: Lists are refreshed periodically as the underlying company graph is re-verified. Last verified Aug 28, 2026.

Frequently asked

How many energy efficiency investment firms are there based in Belgium?

There are 35 energy efficiency investment firms headquartered in Belgium as of August 2026 (RevenueBase).

What is the largest company on this list?

Delpower, headquartered in Belgium, tops this list with the largest team on record.

Which city has the most energy efficiency investment firms?

Brussels leads with 3 headquartered companies, followed by Mechelen (2) and Viesville Pont-A-Celles (1).

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 111 verified decision-maker contacts tracked across these 35 companies.

How current is this list?

The list is refreshed periodically as the underlying company graph is re-verified. It was last verified on August 28, 2026.

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About this data

RevenueBase is a B2B contact data platform. Its company graph covers 21.3 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, the same data that powers RevenueBase's B2B data products and the free research portal.