Lists of energy and environmental technology companies, built around projects.

01  The market

Who this list is for

This page is for suppliers that sell to energy and environmental companies: equipment and component makers, EPC and engineering firms, installers, inspection and maintenance services, software and data providers, and technical distributors. A search for "energy companies" mostly returns household electricity suppliers. That is not your market. Your buyers are the businesses that build, run and supply plants, grids and treatment facilities.

What is in the list

The Energy & Environmental Technology unit covers 56 sub-sectors, including hydrogen production and electrolysis, battery cell and module manufacturing, energy storage systems, solar and wind manufacturing and development, offshore wind services, biogas and waste-to-energy, carbon capture, grid and distribution operators, transformers and switchgear, heat pumps and district heating, water and wastewater treatment, and plastics and metal recycling.

Every row has the company name, country, region, city, sector, sub-sector, company size, a priority rating and one sentence explaining why the company is a probable buyer of what you sell. You get an Excel file with filters on every column, usually within 5 minutes to 1 hour after payment confirmation on working days (orders at the weekend arrive on Monday; in exceptional cases up to 24 hours). We do not pad lists to reach a number, and we leave out your competitors.

A reason to contact every company

This sector buys around projects: an electrolyser going up, a battery line being commissioned, a plant being decarbonised, a grid connection being reinforced. The sentence on each row names that kind of reason, so you can call when it is relevant rather than when it suits your calendar.

Energy companies in Germany

Destatis reports that 438.2 TWh of electricity was fed into the German grid in 2025, 58.6% of it from renewable sources, with wind at 30.0% and solar at 16.0%. Electrical equipment manufacturing employs 416,908 people. See our Germany prospect lists.

Energy companies in the Netherlands and Belgium

CBS reports that renewables supplied 49% of Dutch electricity production in 2025, with wind capacity at 7.0 GW on land and 4.7 GW at sea at the end of the year; gas extraction from the Groningen field ended by law in April 2024. Statbel puts Belgian gross electricity production at 73.1 TWh in 2025 (nuclear 23.8, wind 13.5, solar 10.5 TWh), and nine Belgian offshore wind farms have 399 turbines and 2.262 GW. See our Netherlands prospect lists and Belgium prospect lists.

Energy companies in the United Kingdom and France

Renewables supplied 52.1% of UK electricity in 2025. In France, 547.5 TWh of electricity was produced in 2025, 68.1% of it nuclear, with solar capacity rising to 30.4 GW and 1.9 GW offshore wind in operation. See our United Kingdom prospect lists and France prospect lists.

Energy companies in the Nordics

Statistics Denmark reports 33,038 GWh of Danish electricity production in 2025, of which 19,078 GWh from wind. Norway produced 161.8 TWh, 145.5 TWh of it hydro (SSB), and crude oil and natural gas were 57% of its goods export value in 2025. Sweden produced around 167 TWh, and Finland about 78.9 TWh, with nuclear at 31.3 TWh and wind at 22.2 TWh. See Denmark prospect lists, Norway prospect lists, Sweden prospect lists and Finland prospect lists.

Also covered: Switzerland, Austria and more

Hydropower supplied 59.6% of Swiss electricity in 2024 and nuclear 28.4%. Austria generated 73,130 GWh gross in 2025, about half from hydro. See Switzerland prospect lists, Austria prospect lists, Italy prospect lists, Poland prospect lists, Ireland prospect lists and Luxembourg prospect lists.

Figures are quoted from the official statistics and sector bodies cited on each linked country page, with their year. Nexfield does not publish company counts of its own.

Start with a €99 test

You do not have to commit to a full list to find out whether it works for energy and environmental buyers. The Test is a sample of the real list: about 8 to 12 highly matched companies in one country, for example offshore wind suppliers in Denmark or water operators in Germany, delivered in the same Excel format as a full order. It costs €99, excluding VAT. One fixed price, no subscription, no contract, no minimum. If the sample fits, order Local (€950) for the rest of that country, or Regional (€1,500, two countries) and Regional Plus (€2,000, three countries) for a wider market.

Start with a €99 test or order a full list.

GDPR and company data

Every entry is researched by our AI and confirmed in public sources. The lists are about companies, not people: they contain no personal contact details and no email addresses, so you are not buying a database of individuals. You remain responsible for how you contact the companies, as set out in section 8 of our terms and conditions. Many customers add contacts afterwards with a tool such as Apollo or Lusha, once they know which companies are worth it.

02b  Specialist signals

Signals we look for

The signals this unit looks for:

• Auction and tender results. Awards in renewable, grid and storage auctions and EU tenders open the procurement window.
• EU funding selections. Selections under the European Hydrogen Bank and the Innovation Fund come with fixed project timelines.
• Permit and registration milestones. Published permits and newly registered generation units mark the move from planning to building and operation.

We speak your buyers' language

Pipeline, FID, grid connection, PPA, EPC, balance of plant, commissioning, O&M.

Our method

Public, company-level sources only. The reason to contact names the signal we found, and we never invent one.