| # | Company | Employees |
|---|---|---|
| 1 |
Leonardoleonardo.com
Defense and security multinational company specializing in aerospace, cybersecurity, military systems, and advanced technology solutions |
38,521 |
| 2 | 32,259 | |
| 3 |
Ferrovie dello Stato Italiane S.p.A.fsitaliane.it
National rail infrastructure management, passenger transport services, logistics solutions, and urban regeneration projects across Italy. |
28,071 |
| 4 |
Sapienza Universitร di Romauniroma1.it
A prestigious, historic university in Rome with a diverse range of academic programs, research opportunities, and international exchange programs for students and academics |
16,981 |
| 5 |
Rete Ferroviaria Italianarfi.it
Management and maintenance of railway tracks, stations, installations, ensuring safe circulation and upgrading of Italy's railway network infrastructure. |
12,761 |
| 6 |
Trenitaliatrenitalia.com
A leading European rail operator providing passenger transportation and logistics services for goods both domestically and within Europe |
10,198 |
| 7 |
Rai - Radiotelevisione Italianarai.it
Operates multiple TV channels and radio stations, funded by license fees and advertising, with significant audience share in Italy. |
9,901 |
| 8 |
Agenzia delle Entrateagenziaentrate.gov.it
The company ensures tax compliance, assists taxpayers, recovers tax evasion, provides cadastral services, and collaborates internationally to support finance departments |
7,343 |
| 9 |
Consiglio Nazionale delle Ricerchecnr.it
A public organization in Italy that conducts and promotes interdisciplinary research in various sectors for scientific, technological, and social development |
6,744 |
| 10 |
University of Rome Tor Vergataweb.uniroma2.it
This is a public research university located in Rome, Italy, with a current president from the Faculty of Medicine and Surgery. |
5,902 |
| 11 |
ANAS SpAstradeanas.it
Designing, constructing, and maintaining sustainable and technologically innovative roads in Italy to ensure future mobility, connecting cities and territories for economic and social development |
4,891 |
| 12 |
Banca d'Italiabancaditalia.it
The company is the central bank of Italy, operating within national and European regulations as part of the Eurosystem and European System of Central Banks |
4,415 |
| 13 |
Aeronautica Militareaeronautica.difesa.it
The company operates 24/7 for defense of the state, safeguarding institutions and citizens, controlling airspace, and providing excellence in aviation capabilities nationally and internationally |
4,062 |
| 14 |
INAIL, Istituto Nazionale Assicurazione contro gli Infortuni sul Lavoroinail.it
A public non-profit entity founded in 1883, provides insurance for all workers against work-related accidents, disabilities, health damage, and occupational diseases Additionally, supports injured workers with rehabilitation and reintegration assistance |
4,031 |
| 15 |
Universitร degli studi Roma TREuniroma3.it
A young and prestigious university in Italy offering a wide range of degree programs, emphasizing research, international collaboration, and sustainability |
3,932 |
| 16 |
Policlinico Umberto Ipoliclinicoumberto1.it
The University Hospital Policlinico Umberto I in Rome is a specialized hospital offering prevention, diagnosis, and treatment services, as well as medical education and research |
3,261 |
| 17 |
International Fund for Agricultural Development (IFAD)ifad.org
An international financial institution, part of the UN, dedicated to transforming rural economies and food systems by investing in rural communities |
2,781 |
| 18 |
Invitaliainvitalia.it
Invitalia helps attract investments and supports business development in Italy, particularly in the Mezzogiorno region, through innovation, territorial development, and foreign investment promotion |
2,775 |
| 19 | 2,659 | |
| 20 | 2,564 | |
| 21 | 2,332 | |
| 22 |
Istituto Superiore di Sanitร iss.it
Leading research institute in public health in Italy, with a focus on protecting citizens' health through evidence-based policies, research, and expert consultations |
2,160 |
| 23 | 2,138 | |
| 24 |
ATAC SpAatac.roma.it
Leading public transport operator in Rome managing various collective mobility services, including buses, trams, metros, and parking facilities, with a focus on quality and safety |
2,115 |
| 25 |
CDP Cassa Depositi e Prestiticdp.it
Finances public investments, supports international cooperation, promotes infrastructure growth, aids Italian enterprises' innovation and expansion, and develops social housing. |
2,028 |
| 26 |
Stato Maggiore Difesadifesa.it
A company dedicated to supporting and carrying out military missions for the country, emphasizing the importance of armed forces |
1,909 |
| 27 |
Italferr S.p.A.gruppofsengineering.it
A leading Italian engineering firm with expertise in infrastructure projects for rail, road, and port, offering design, management, and consultancy services internationally |
1,896 |
| 28 | 1,753 | |
| 29 | 1,661 | |
| 30 |
ASL Roma 1aslroma1.it
A health organization in Rome aimed at promoting and protecting the health of residents through healthcare services based on modern scientific knowledge and quality standards |
1,648 |
| 31 | 1,264 | |
| 32 |
ASL Roma 2youtube.com
The company promotes and protects citizens' health by forming alliances in healthcare, social services, and environmental sectors, focusing on innovation and efficiency |
1,182 |
| 33 |
CREA Ricercacrea.gov.it
Leading Italian research organization focused on agri-food supply chains Innovative and sustainable solutions in agriculture, livestock, food science, and socio-economics Promoting circular economy and consumer protection |
1,128 |
| 34 |
ALES Arte Lavoro e Servizi S.p.A.ales-spa.com
A company supporting the Ministry of Culture in safeguarding and enhancing cultural heritage through various services, projects, events, and promoting the Art Bonus tax credit |
1,068 |
| 35 |
Sviluppo Lavoro Italiasviluppolavoroitalia.it
Development and implementation of national and regional active employment policies as a key intermediary between State and Regions Partnering for evolving job market needs |
1,052 |
| 36 |
Istituto Poligrafico e Zecca dello Stato (IPZS)ipzs.it
The company protects citizens' physical and digital identities, secures sensitive data, ensures production reliability, and enhances cultural heritage through tailored solutions and products |
1,038 |
| 37 |
Azienda Ospedaliera San Giovanni Addoloratahsangiovanni.roma.it
A historical hospital in Rome offering modern healthcare services, level II emergency care, specialized clinical units, and regional eye bank services |
1,031 |
| 38 |
Agenzia del Demanioagenziademanio.it
The agency manages and enhances the State's real estate assets, promoting projects for their recovery and optimization to increase economic and social value |
1,005 |
| 39 |
POLICLINICO TOR VERGATAptvonline.it
A hospital and healthcare organization located in Rome, Italy focused on providing medical services and care to the community |
957 |
| 40 |
Istituto Nazionale di Geofisica e Vulcanologiaingv.it
The company specializes in monitoring geophysical phenomena, such as seismic activity and volcanic eruptions, in Italy through advanced instrumentation and collaboration with universities and research institutions |
916 |
| 41 | 909 | |
| 42 |
Ferserviziferservizi.it
A subsidiary of Ferrovie dello Stato SpA, Ferservizi SpA manages the real estate assets and non-core operations of the railway group |
879 |
| 43 |
IFO - Istituto Nazionale Tumori Regina Elena - Istituto Dermatologico San Gallicanoifo.it
A public entity managing two internationally renowned cancer and dermatology institutes since 1939, focusing on research, specialized care, and training |
859 |
| 44 |
ANPAL Servizisviluppolavoroitalia.it
ANPAL Servizi supports ANPAL in implementing active employment policies, providing job support services, promoting self-employment, and strengthening relationships with schools and businesses |
836 |
| 45 |
ENAC
Regulating, certifying, overseeing, and controlling civil aviation in Italy, ensuring safety, security, passenger rights, and environmental protection across airports and air transport. |
788 |
| 46 |
ITA - Italian Trade Agencyice.it
Promotes Made in Italy globally, supports Italian companies' growth in foreign markets, and attracts foreign investments to Italy, collaborating with stakeholders. |
784 |
| 47 |
INAF Istituto Nazionale di Astrofisicainaf.it
The company promotes, coordinates, and conducts research in Astronomy, Radioastronomy, Space Astrophysics, and Cosmic Physics It also promotes astronomy education in schools and society |
777 |
| 48 |
GSE (Gestore Servizi Energetici)gse.it
Public company supporting renewable energy sources in Italy, providing economic incentives and promoting sustainable, efficient energy use awareness. |
756 |
| 49 |
Ama S.p.A.amaroma.it
AMA Spa is a leading Italian company in integrated environmental services, focusing on urban hygiene, waste management, sustainability, and innovation for a sustainable future |
722 |
| 50 |
Sport e Salutesportesalute.eu
A state-owned company promoting grassroots sports and healthy lifestyles |
704 |
| 51 |
Consiglio dell'Ordine degli Avvocati di Romaordineavvocatiroma.it
A non-profit public entity providing essential services to the public |
700 |
| 52 | 696 | |
| 53 |
Consip SpAconsip.it
Operates for Public Administration, digitizing public purchases through e-Procurement solutions, providing contracts and negotiation tools for goods, services, and works. |
630 |
| 54 |
INPS Servizi SpAinpsservizi.it
INPS Servizi SpA is an in-house company fully owned by INPS, providing multichannel Contact Center services and administrative support to various organizations |
600 |
| 55 |
AIFA Agenzia Italiana del farmacoaifa.gov.it
The company is the national regulatory authority for drugs in Italy, ensuring safe access and proper use, managing pharmaceutical spending, promoting innovation, and collaborating with stakeholders |
594 |
| 56 |
ENAC - Ente Nazionale per l'Aviazione Civileenac.gov.it
The company acts as the sole technical regulation, certification, supervision, and control authority in the civil aviation sector in Italy, ensuring safety and quality in aviation |
581 |
| 57 |
Cotral Spacotralspa.it
Manages public transport in the Lazio Region, operating bus services across 376 municipalities and daily transporting over 300,000 passengers, also managing two railway lines. |
514 |
| 58 |
Agenzia Spaziale Italianaasi.it
Develops space science, satellite technologies, and space exploration. Manages Earth observation, environmental monitoring, and space propulsion, notably leading the European VEGA program. |
407 |
| 59 | 305 | |
| 60 |
CDP Venture Capital SGRcdpventurecapital.it
CDP Venture Capital SGR aims to accelerate growth of Italian venture capital ecosystem, attract investors, support startups, and foster innovation |
227 |
| 61 |
Lazio Innovalazioinnova.it
LAZIO INNOVA is a regional organization in Lazio specializing in providing incentives, credit support, innovation services, and assistance for business development and social inclusion |
177 |
| 62 |
ENIT โ Italian National Tourist Boardenit.it
Promotion of Italian tourism through strategic marketing, partnerships, market research, and digital strategies to enhance sustainable economic and cultural growth. |
169 |
| 63 |
MAXXI Museo nazionale delle arti del XXI secolomaxxi.art
A national museum in Italy dedicated to contemporary arts and architecture, managed by a foundation and designed by Zaha Hadid Architects |
163 |
| 64 |
INVIMIT SGR SpAinvimit.it
A management company specializing in collective real estate investment funds, managing public properties and promoting sustainability and environmental impact reduction |
57 |
| 65 |
Galleria Borghesegalleriaborghese.beniculturali.it
This company operates as museums and institutions |
53 |
| 66 |
Fercreditfsitaliane.it
A financial services company established by Ferrovie dello Stato Italiane SpA in 1992, offering factoring, leasing, and consumer credit within the group and to external clients |
31 |
Turn this list into pipeline
Tamtam finds the decision-makers at every company on a list like this one, with verified emails, phone numbers and the buying signals that tell you when to reach out.
How this list is built
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 Oct 24, 2026.
More company lists in Rome
- The largest companies in Rome 936
- Financial services firms in Rome 80
- Retail chains in Rome 77
- Critical infrastructure operators in Rome 67
- IT Services and IT Consulting companies in Rome 66
- Financial Services companies in Rome 56
- IT services companies in Rome 47
- Hospitality companies in Rome 41
- Software Development companies in Rome 39
- Government Administration companies in Rome 37
- Education providers in Rome 30
- Luxury brands in Rome 30
- Entertainment Providers companies in Rome 29
- Hospitals and Health Care companies in Rome 29
- Family-owned companies in Rome 29
- Research institutes in Rome 27
- SaaS companies in Rome 27
- Hotel and hospitality groups in Rome 26
- Insurance companies in Rome 25