Company lists · Data refreshed September 2026

Top 25 Renewable energy infrastructure contractors based in Italy

Name: Renewable energy infrastructure contractors based in Italy
Creator: RevenueBase
License: https://creativecommons.org/licenses/by/4.0/

Compiled by the RevenueBase Data Team Data refreshed Sep 17, 2026 713 companies tracked

RevenueBase identified 713 renewable energy infrastructure contractors headquartered in Italy as of September 2026 and tracks 49,955 professional contacts across them, including 13,997 with verified work emails. Roma is the largest hub.

This list covers renewable energy infrastructure contractors headquartered in Italy, 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, its RevenueBase Smart Search rating, and when it was last checked. Data refreshed September 17, 2026.

Published by RevenueBase, a B2B data infrastructure company. This list was built with RevenueBase Smart Search, 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 RevenueBase Smart Search rating on every row Refreshed Sep 17, 2026 86% judged on-target in blind review

713Companies

49,955Contacts tracked

13,997Verified emails

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The 25 largest renewable energy infrastructure contractors based in Italy

Ranked by team size

Top 25 of 713 renewable energy infrastructure contractors based in Italy, ranked by team size, largest first. Data refreshed Sep 17, 2026. RevenueBase Smart Search rates how each company's information relates to renewable energy infrastructure contractors: strong evidence (its own description names it), partial (names part of it), indirect (matched on the rest of its profile rather than the description shown). Click a contact count to view that company's people.
#	Company	RevenueBase Smart Search	Headquarters	Employees	Contacts
1	Saipem	Strong evidence	Milan, ItalyHQ checked Sep 17, 2026	10001+	34,095 contacts →
	Strong evidence “Saipem is a global leader in the engineering and construction of major projects for the energy and infrastructure sectors, both offshore and onshore.” Source: RevenueBase Database · checked Sep 17, 2026
2	Enel Green Power	Strong evidence	Roma, ItalyHQ checked Sep 17, 2026	5,001-10,000	5,251 contacts →
	Strong evidence “We are the Enel Group company dedicated to the development and management of renewable energy generation worldwide.” Source: RevenueBase Database · checked Sep 17, 2026
3	SICIM	Strong evidence	Busseto, ItalyHQ checked Sep 17, 2026	10001+	2,404 contacts →
	Strong evidence “SICIM is a leading Worldwide EPC Contractor since 1962, offering all kinds of services related to the production, treatment and transportation of traditional energy sources and…” Source: RevenueBase Database · checked Sep 17, 2026
4	Dolomiti Energia	Indirect evidence	Rovereto, ItalyHQ checked Sep 17, 2026	1,001-5,000	369 contacts →
	Indirect evidence “Rinnovabili.” Source: RevenueBase Database · checked Sep 17, 2026
5	Fisia Italimpianti	Indirect evidence	Genova, ItalyHQ checked Sep 17, 2026	51-200	362 contacts →
	Indirect evidence “Fisia Italimpianti S.p.A, part of Webuild Group (the new group born in 2020 from Salini Impregilo), is a worldwide leader in the sustainable design and execution of water…” Source: RevenueBase Database · checked Sep 17, 2026
6	Techbau S.P.A	Partial evidence	Castelletto Sopra Ticino, ItalyHQ checked Sep 17, 2026	201-500	244 contacts →
	Partial evidence “Techbau S.p.A, Italy's leading General Contractor and Developer, acts as a single point of contact, developing projects across various fields of civil engineering and…” Source: RevenueBase Database · checked Sep 17, 2026
7	STE Energy	Partial evidence	Padova, ItalyHQ checked Sep 17, 2026	51-200	194 contacts →
	Partial evidence “Since June 2025, STE Energy has been acquired by, becoming part of the world.” Source: RevenueBase Database · checked Sep 17, 2026
8	NBI SPA	Partial evidence	Bologna, ItalyHQ checked Sep 17, 2026	501-1,000	184 contacts →
	Partial evidence “Belonging to Italian industrial giant Webuild Group, NBI develops turnkey projects and provides expert advice and intervention with regard to plant design and energy services…” Source: RevenueBase Database · checked Sep 17, 2026
9	Carlo Gavazzi Impianti	Strong evidence	Assago, ItalyHQ checked Sep 17, 2026	51-200	173 contacts →
	Strong evidence “Carlo Gavazzi Impianti is an International EPC Contractor based in Italy focused on electrical systems and electro-mechanical instrumentation in the sectors of infrastructure…” Source: RevenueBase Database · checked Sep 17, 2026
10	Espe S.P.A	Indirect evidence	Grantorto, ItalyHQ checked Sep 17, 2026	51-200	144 contacts →
	Indirect evidence “Know-how, experience, reliability, innovation.” Source: RevenueBase Database · checked Sep 17, 2026
11	Algowatt	Strong evidence	Milano, ItalyHQ checked Sep 17, 2026	n/a	137 contacts →
	Strong evidence “TerniEnergia is active in the energies from renewable sources business, particularly in the photovoltaic segment, where it operates as a system integrator.” Source: RevenueBase Database · checked Sep 17, 2026
12	Tozzi Green S.P.A	Partial evidence	Mezzano, ItalyHQ checked Sep 17, 2026	201-500	132 contacts →
	Partial evidence “Tozzi Green è una società specializzata in servizi e progetti per lo sviluppo d’impianti e per la generazione di energia da fonti rinnovabili.” Source: RevenueBase Database · checked Sep 17, 2026
13	Asja Energy	Partial evidence	Rivoli, ItalyHQ checked Sep 17, 2026	201-500	114 contacts →
	Partial evidence “Asja is an International group of companies that design, build and manage renewable power plants.” Source: RevenueBase Database · checked Sep 17, 2026
14	Ivpc Group	Partial evidence	Avellino, ItalyHQ checked Sep 17, 2026	201-500	110 contacts →
	Partial evidence “Uno dei principali gruppi a livello nazionale nel settore delle energie rinnovabili.” Source: RevenueBase Database · checked Sep 17, 2026
15	Esapro	Partial evidence	Milano, ItalyHQ checked Sep 17, 2026	51-200	98 contacts →
	Partial evidence “We have more than 10 years’ experience in designing, building and managing renewable power plant and an enviable track record in the maintenance, revamping and 24/7 surveillance…” Source: RevenueBase Database · checked Sep 17, 2026
16	BFP	Indirect evidence	Modugno, ItalyHQ checked Sep 17, 2026	11-50	95 contacts →
	Indirect evidence “BFP Group is an engineering & consultancy firm with international offices, applying ten years of experience to offer services worldwide across various sectors, including civil and…” Source: RevenueBase Database · checked Sep 17, 2026
17	PEF SPA	Partial evidence	Barberino Tavarnelle, ItalyHQ checked Sep 17, 2026	11-50	93 contacts →
	Partial evidence “PEF SpA nasce a Firenze nel 2006, iniziando ad operare nel settore delle energie rinnovabili, con la commercializzazione su tutto il territorio nazionale di impianti fotovoltaici…” Source: RevenueBase Database · checked Sep 17, 2026
18	Delos Power	Indirect evidence	Milano, ItalyHQ checked Sep 17, 2026	51-200	85 contacts →
	Indirect evidence “Ogni giorno, lavoriamo per generare un impatto positivo sull'ambiente e sulla società.” Source: RevenueBase Database · checked Sep 17, 2026
19	Comis S.R.L	Indirect evidence	Pesaro, ItalyHQ checked Sep 17, 2026	51-200	85 contacts →
	Indirect evidence “Creata nel 1994, Comis s.r.l.” Source: RevenueBase Database · checked Sep 17, 2026
20	Sunnerg Group	Strong evidence	Milan, ItalyHQ checked Sep 17, 2026	51-200	69 contacts →
	Strong evidence “WHO WE ARE SUNNERG is General Contractor and Service Provider specializing in "turnkey projects" in the 'Energy & Facility Management B2B market, with a particular focus on the PV…” Source: RevenueBase Database · checked Sep 17, 2026
21	Energy Italy	Partial evidence	Costermano Sul Garda, ItalyHQ checked Sep 17, 2026	11-50	59 contacts →
	Partial evidence “Energy Italy SpA, azienda parte del gruppo Energy Holding, dal 2012 è tra le realtà più innovative nel settore delle energie rinnovabili e del risparmio energetico.” Source: RevenueBase Database · checked Sep 17, 2026
22	Undo Group	Partial evidence	Rome, ItalyHQ checked Sep 17, 2026	51-200	55 contacts →
	Partial evidence “We produce sustainable energy by covering the entire supply chain from site scouting to the construction and operational management of our power plants.” Source: RevenueBase Database · checked Sep 17, 2026
23	TEN Project	Partial evidence	San Martino Sannita, ItalyHQ checked Sep 17, 2026	11-50	52 contacts →
	Partial evidence “L’ambito principale di attività riguarda la progettazione, la realizzazione e la gestione di infrastrutture elettriche e di impianti di produzione di energia da fonti rinnovabili…” Source: RevenueBase Database · checked Sep 17, 2026
24	Tonello Energie	Partial evidence	Fara Vicentino, ItalyHQ checked Sep 17, 2026	11-50	48 contacts →
	Partial evidence “Tonello Energie nasce dalla tradizione industriale della Capogruppo Tonello Srl, azienda leader dal 1981 a livello mondiale nella produzione di macchinari del tessile.” Source: RevenueBase Database · checked Sep 17, 2026
25	Natpower	Indirect evidence	Milano, ItalyHQ checked Sep 17, 2026	51-200	47 contacts →
	Indirect evidence “NatPower is an independent company founded in 2019, led by accomplished managers with more than 25 years of expertise in the global green industry.” Source: RevenueBase Database · checked Sep 17, 2026

RevenueBase Smart Search

RevenueBase Smart Search assesses information from a company’s LinkedIn profile, information supplied directly by the company, its website, and other publicly available sources. It uses that information to rate how closely the company relates to this list’s category: renewable energy infrastructure contractors. Every row carries its rating and the description the rating was read from, so each one can be checked rather than taken on trust.

Strong evidence: The company's own public description of its business names renewable energy infrastructure contractors.
Partial evidence: Its own public description names part of renewable energy infrastructure contractors, so it works in or next to the category without describing itself that way.
Indirect evidence: The description shown does not name renewable energy infrastructure contractors. The match rests on the rest of the company's public profile rather than the one sentence quoted here, so this is the rating to check first.

RevenueBase Smart Search is how these lists are built: RevenueBase's data engine and AI assemble the companies that match a category defined in a user's own words, so a list can be about what companies actually do rather than about whichever industry code they were filed under.

Showing 25 of 713 renewable energy infrastructure contractors based in Italy

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Renewable energy infrastructure contractors based in Italy at a glance

As of Sep 17, 2026

28.0%Verified-email coverage

70.1Average contacts per company

11-50Median size (employees)

5.0%Largest-city concentration · Roma

Sep 17, 2026Page data refreshed

Companies by employee count

1-10

308

11-50

303

51-200

201-500

501-1,000

1,001-5,000

5,001-10,000

10001+

Email recency for this list is measured worldwide rather than for Italy, so it is reported there. Company counts and contact totals on this page are exact for Italy, over 713 companies.

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 renewable energy infrastructure contractors, so some rows will be adjacent to the category rather than pure plays. The description and RevenueBase Smart Search 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 Smart Search, the natural-language company search available to every RevenueBase user.
What qualifies: Companies headquartered in Italy whose own description of what they do matches “renewable energy infrastructure contractors”. Matching reads each company's description, not its industry code or its name.
RevenueBase Smart Search: RevenueBase Smart Search is how this list is assembled and how each row is rated. RevenueBase's data engine and AI assess a company's LinkedIn profile, information supplied directly by the company, its website and other publicly available information, then relate it to a category defined in a user's own words. Each row is rated strong evidence (its own description names renewable energy infrastructure contractors), partial evidence (it names part of the category) or indirect evidence (the description shown names none of it and the match rests on the rest of the company's profile). The description supporting each rating is quoted on the row.
What we exclude: Companies whose own description does not clearly place them among renewable energy infrastructure contractors, and records with no verified work email. Companies headquartered outside Italy 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 its RevenueBase Smart Search 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, 13,997 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 17, 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.

Renewable energy infrastructure contractors by metro

Renewable energy infrastructure contractors in Roma36
Renewable energy infrastructure contractors in Milan26

Frequently asked

What is RevenueBase Smart Search?

RevenueBase Smart Search is how RevenueBase decides which companies belong on this list and how strongly each one fits. Its data engine and AI assess a company's LinkedIn profile, information supplied directly by the company, its website and other publicly available information, then relate it to the category the list is about. Each row is rated strong evidence when the company's own description names renewable energy infrastructure contractors, partial evidence when it names part of the category, and indirect evidence when the description shown names none of it and the match rests on the rest of the company's profile.

How many renewable energy infrastructure contractors are there based in Italy?

RevenueBase identified 713 renewable energy infrastructure contractors headquartered in Italy 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?

Saipem, headquartered in Milan, tops this list with the largest team on record.

Which city has the most renewable energy infrastructure contractors?

Roma leads with 36 headquartered companies, followed by Milan (26) and Milano (22).

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 13,997 verified decision-maker contacts tracked across these 713 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 17, 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 Smart Search, 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.