These companies in Lombardy primarily operate in environmental services, utilities, and construction, with a strong presence in industrial manufacturing and chemical sectors. The list includes established large and mid-sized firms. Webuild specializes in large-scale sustainable infrastructure, while A2A focuses on environment, water, and energy. Italgas is a network tech company for gas, water, and energy efficiency, and The SIAD Group is a chemical group involved in industrial gases and environmental management. Siram Veolia provides integrated energy efficiency and waste management, and De Nora is a multinational in electrochemistry and sustainable technologies.
The companies demonstrate a clear concentration of headquarters in Milan, highlighting the city's role as a central hub for environmental and infrastructure-related businesses in the region. Many of these firms, such as A2A, The SIAD Group, and Gruppo CAP, have long operational histories, indicating a mature and well-established industry landscape.
| # | Company | Employees | |||
|---|---|---|---|---|---|
| 1 |
Webuildwebuildgroup.com
A global leader in designing and constructing large, complex projects in sustainable mobility, hydropower, water infrastructure, and green buildings worldwide |
7,514 | |||
| 2 |
A2Agruppoa2a.it
A company in Italy focused on environment, water, and energy, promoting circular economy and sustainable development goals through various services and operations |
5,026 | |||
| 3 |
Italgasitalgas.it
A leading Network Tech Company in gas, water, energy efficiency, and IT sectors, providing services to millions of customers in Italy and Greece |
3,661 | |||
| 4 |
The SIAD Groupthesiadgroup.com
A leading Italian chemical group offering industrial gases, engineering services, healthcare facilities, LPG and natural gas distribution, environmental management, and energy solutions |
1,559 | |||
| 5 |
Siram Veoliaveolia.it
Provides integrated energy efficiency, water cycle management, and special waste services for public and private sectors to reduce emissions and resource waste. |
1,497 | |||
| 6 |
De Noradenora.com
A multinational company specializing in electrochemistry and sustainable technologies, leading in industrial green hydrogen production, water treatment, and energy efficiency optimization |
1,267 | |||
| 7 |
Edison Nextedisonnext.it
The company focuses on caring for customers and territories through eco-friendly and decarbonization solutions, promoting innovation and sustainable growth |
1,170 | |||
| 8 | 1,126 | ||||
| 9 |
Impregilowebuildgroup.com
Global construction group specializing in major public works, ranking first in water infrastructure projects Operating in 50+ countries with a century of expertise in complex projects |
703 | |||
| 10 |
ARPA Lombardiaarpalombardia.it
The company works with regional and local institutions to prevent environmental pollution, monitor electromagnetic fields, and provide environmental education to citizens |
685 | |||
| 11 |
Eni Rewindeni.com
Eni Rewind utilizes Circular Economy principles to remediate and recover industrial land, water, and waste, creating value for local communities worldwide |
623 | |||
| 12 |
Gruppo CAPgruppocap.it
This company manages the integrated water service in multiple areas, ensuring public control and transparency while investing in infrastructure and IT tools |
464 | |||
| 13 |
LabAnalysislabanalysis.it
Laboratories providing analysis services in environmental, pharmaceutical, food, health, safety, agrochemicals Environmental monitoring, consultation, certifications, training in safety and health |
464 | |||
| 14 |
SOCOTEC Italiasocotec.it
Specializing in infrastructure inspections and tests, SOCOTEC Italia offers services in geotechnical surveys, structural monitoring, emissions control, and environmental analysis in Italy |
454 | |||
| 15 |
Amsa, Azienda Milanese Servizi Ambientali - Gruppo A2Aamsa.it
A company part of the A2A Group, providing a range of services in various sectors |
424 | |||
| 16 |
Gruppo Acinquegruppoacinque.it
A leading multiutility company in various Italian regions specializes in designing smart, sustainable cities, energy transition, circular economy, waste management, and more |
421 | |||
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| 17 |
ITELYUMitelyum.com
A leading European company specializing in regenerating used oils, producing high-quality lubricant bases, diesel, and asphalt through innovative patented technology |
309 | |||
| 18 |
Whitelabwhitelab.it
White Lab is a global network of specialized laboratories in Italy, providing quality and safety testing services for consumer goods, prioritizing customer satisfaction through tailored solutions |
295 | |||
| 19 |
Alfa Varese |Acquedotto | Fognatura | Depurazionealfavarese.it
Manages integrated water services for 144 municipalities in Varese province, covering water supply, distribution, sewerage, and wastewater treatment, returning it to the environment. |
254 | |||
| 20 |
ECONORD S.P.A.econord.it
The company specializes in environmental services, including waste treatment, recycling facilities, and biogas power plants, with a focus on sustainable practices and responsible management |
218 | |||
| 21 |
Greenthesis Groupgreenthesisgroup.com
A leading environmental group in Italy, specializing in green economy services such as waste management, biogas production, and environmental remediation |
188 | |||
| 22 |
BrianzAcquebrianzacque.it
A public company providing integrated water services in Monza and Brianza Province, managing water supply, sewage, and purification with focus on sustainability and innovation |
186 | |||
| 23 |
Riva & Mariani Group S.p.a.rivamariani.com
An experienced multi-service company specializing in industrial plant design, construction, maintenance, insulation, scaffolding, asbestos removal, painting, and energy-saving Tipcheck assessments |
186 | |||
| 24 |
Veolia | Water Tech Italiaveoliawatertechnologies.it
A leading global provider of water treatment solutions for industrial and municipal sectors, offering innovative technologies and services backed by research and collaboration |
163 | |||
| 25 |
CEM Ambiente - Servizi di igiene urbanacemambiente.it
The company provides integrated waste management services for 70 municipalities, specializing in urban hygiene, waste treatment, recycling, and collection services |
91 | |||
| 26 | 55 | ||||
| 27 |
Green Up | Gestione rifiuti speciali e Servizi Ambientaligreen-up.it
Specialized in environmental services, the company manages waste collection, treatment, recovery, and disposal for businesses, focusing on reducing environmental impact |
46 | |||
| 28 |
Tri-Mer Global Technologiesindustriousgt.com
A technology leader in air pollution control, offering dry and wet solutions with complete turnkey project delivery and management |
29 | |||
| 29 |
ERP Italia Servizierpitaliaservizi.it
An authorized intermediary handling all types of waste nationwide, offering sustainable waste management solutions for businesses, focusing on recycling and circular economy principles |
27 | |||
| 30 |
Smaltimento Assistitosmaltimentoassistito.it
The company provides advanced waste management services focused on environmental responsibility, benefiting businesses, individuals, and the environment through conscious waste handling |
12 | |||
| 31 |
Barcorebarcore.it
General contractor specializing in design, construction, and management of large building projects, renovations, flooring and cladding installation, waste treatment services |
11 | |||
| 32 |
Cooperativa Sociale Betania Onlusbetania99.com
The company is a social cooperative providing services in third-party transport, logistics, waste management, cleaning, green space maintenance, cemetery management, and personal assistance |
8 | |||
| 33 |
Consorzio ecoR'itecorit.it
A non-profit collective system specializing in proper management of electronic waste, focusing on reuse of materials and environmental preservation through certified partners |
6 | |||
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Every company on this list has a Tamtam company profile. The industry is the one the company gives on LinkedIn; categories such as SaaS or fintech are classified by Tamtam's AI from the company's website and LinkedIn page; and the headquarters city must match the company's own address. Companies are ranked by the number of employees on LinkedIn, and the list is refreshed every night. Classifications can be wrong, so treat the list as a starting point rather than an official ranking. Last updated Nov 12, 2026.
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- Transportation, Logistics, Supply Chain and Storage companies in Lombardy 135
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