These critical infrastructure operators in Hauts-de-Seine are predominantly large groups in diverse sectors. They include VINCI Concessions, a global leader in mobility infrastructure, and Orange, a major telecommunications operator. Financial services are also well represented with Groupe Crédit Agricole, a leading European retail bank, and Worldline, which offers advanced payments technology. ENGIE is active in renewable energy power generation, while Framatome designs and services components for nuclear power plants.
A notable pattern is the concentration of headquarters in a few cities. Nanterre is home to VINCI Concessions, VINCI Airports, AXA en France, and BNP Paribas Cardif. Issy-les-Moulineaux hosts Orange and Transdev. Montrouge has Groupe Crédit Agricole and Crédit Agricole CIB, and La Garenne-Colombes houses ENGIE and ENGIE Solutions France. This indicates a geographical clustering of major corporate presences within the department.
| # | Company | Employees | |||
|---|---|---|---|---|---|
| 1 |
VINCI Concessionsvinci-concessions.com
A global leader in mobility infrastructure, designing, financing, building, operating, and maintaining airports, highways, and railway projects in 23 countries |
219,000 | |||
| 2 |
VINCI Airportsvinci-airports.com
Operates, develops, finances, builds airports globally, optimizing performance, modernizing infrastructure, and driving environmental transition with a net-zero emissions goal. |
219,000 | |||
| 3 |
Orangeorange.com
A leading global telecommunications operator offering services to millions of customers and multinational companies across 26 countries |
146,935 | |||
| 4 |
Groupe Crédit Agricolecredit-agricole.com
Leading European retail bank offering comprehensive financial services including loans, insurance, asset management, corporate banking, and customer-focused solutions. |
76,287 | |||
| 5 | 45,706 | ||||
| 6 | 24,479 | ||||
| 7 |
Worldlineworldline.com
Helps businesses accelerate their growth journey quickly, simply, and securely with advanced payments technology, local expertise, and customized solutions. |
15,714 | |||
| 8 |
Crédit Agricole CIBca-cib.com
Corporate and investment bank, global financial services for large corporations and institutions, capital markets, structured finance, commercial banking, pioneering climate finance. |
14,647 | |||
| 9 |
Framatomeframatome.com
Designs, services and installs components, fuel, and instrumentation and control systems for global nuclear power plants while providing digital and technical expertise. |
14,188 | |||
| 10 |
Transdevtransdev.com
Provides safe, reliable, and innovative public transportation solutions globally, empowering daily freedom to move for millions of passengers across 19 countries, serving common good. |
13,519 | |||
| 11 |
Oranoorano.group
International operator in nuclear materials, provides high-value products and services across the entire fuel cycle, addressing energy and health challenges through expertise and innovation. |
12,605 | |||
| 12 |
ENGIE Solutions Franceengie-solutions.com
Provides comprehensive, lasting solutions to businesses, industries, and communities for carbon neutrality, improving infrastructure competitiveness, city attractiveness, and living/working comfort. |
12,252 | |||
| 13 |
AXA en Franceaxa.fr
A global leader in insurance, AXA protects 93 million clients worldwide with a range of products and services for individuals, professionals, and businesses |
11,225 | |||
| 14 |
Societe Generale Corporate and Investment Banking - SGCIBsocietegenerale.com
Supports clients through expansion and challenges, offering tailored solutions, leveraging potential, and providing authentic advisory relationships for financial issues and risk management. |
10,078 | |||
| 15 |
BNP Paribas Cardifbnpparibascardif.com
Global leader in bancassurance and personal insurance, offering products and services through partnerships to over 80 million customers worldwide. |
9,381 | |||
Want more companies than this list?This page shows the largest ones only. Connect to Tamtam to see every company that matches, filter by size, industry or growth, and reach their decision-makers. | |||||
| 16 |
CACEIScaceis.com
Provides asset servicing for asset managers and institutional investors, including execution, clearing, custody, fund administration, and middle-office outsourcing across continents. |
8,046 | |||
| 17 |
Keolis Groupkeolis.com
Global leader in shared mobility, co-constructing safe, smart, and sustainable public transport solutions including metros, tramways, buses, and various innovative services. |
7,847 | |||
| 18 |
Allianz Franceallianz.fr
Offers comprehensive insurance, assistance, and financial services to individuals, professionals, businesses, and communities worldwide, with a strong presence in France. |
7,227 | |||
| 19 | 6,850 | ||||
| 20 |
Africa Global Logisticsaglgroup.com
Specializes in international transport, logistics, and supply chain management focused on supporting Africa's transformation and development. |
6,706 | |||
| 21 |
CNP Assurancescnp.fr
Leading global insurer offering personal risk protection, savings, and pension solutions through multi-partnership models, promoting an inclusive and sustainable society. |
4,828 | |||
| 22 |
Colas Railcolasrail.com
Imagining innovative, eco-friendly railway solutions for global well-being and future challenges, collaborating internationally to achieve ambitious projects with passionate experts. |
4,428 | |||
| 23 |
CERBA HEALTHCAREcerbahealthcare.com
A leading player in medical diagnosis focusing on prevention, disease detection, early diagnosis, and personalized medicine to advance health worldwide |
4,406 | |||
| 24 |
DomusVi Francedomusvi.com
Provides elderly care through innovative therapies and social services while focusing on professional employee development to improve quality of life for residents. |
4,373 | |||
| 25 |
INDIGO Groupgroup-indigo.com
Global provider of parking, individual mobility, digital solutions, and urban services with strong local presence in nine countries. |
4,262 | |||
| 26 | 3,940 | ||||
| 27 |
La Poste Mobilelapostemobile.fr
Provides affordable mobile telecom services with low-cost plans, accessible devices, extensive customer support, and promotes responsible digital usage for all ages. |
3,619 | |||
| 28 |
Swiss Life Franceswisslife.fr
Offers life insurance, private banking, financial management, health, provident, and damage insurance, empowering clients' financial independence. |
3,187 | |||
| 29 |
Groupe CCFgroupeccf.fr
French banking group provides retail banking services through branches and specialized financing for individuals and businesses across France, including overseas territories. |
2,719 | |||
| 30 |
Credit Agricole Leasing & Factoringca-leasingfactoring.com
Specialized financing products for businesses, professionals, farmers, and local authorities including leasing, factoring, and renewable energy project support. |
2,715 | |||
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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 11, 2026.
More company lists in the Hauts-de-Seine department
- The largest companies in the Hauts-de-Seine department 5,160
- Multinational companies in the Hauts-de-Seine department 1,231
- IT services companies in the Hauts-de-Seine department 737
- IT Services and IT Consulting companies in the Hauts-de-Seine department 706
- Professional services firms in the Hauts-de-Seine department 629
- Consulting firms in the Hauts-de-Seine department 563
- Companies with in-house R&D in the Hauts-de-Seine department 510
- SaaS companies in the Hauts-de-Seine department 389
- Business Consulting and Services companies in the Hauts-de-Seine department 304
- Software Development companies in the Hauts-de-Seine department 301
- Retail chains in the Hauts-de-Seine department 292
- Manufacturers in the Hauts-de-Seine department 285
- Advertising Services companies in the Hauts-de-Seine department 281
- Marketing and communications agencies in the Hauts-de-Seine department 235
- Subscription businesses in the Hauts-de-Seine department 228
- Hardware manufacturers in the Hauts-de-Seine department 199
- Financial services firms in the Hauts-de-Seine department 198
- Companies with a mobile app in the Hauts-de-Seine department 189
- AI companies in the Hauts-de-Seine department 159
- Education providers in the Hauts-de-Seine department 159
- Cybersecurity companies in the Hauts-de-Seine department 154
- Distributors and wholesalers in the Hauts-de-Seine department 154
- Recruitment and staffing agencies in the Hauts-de-Seine department 152
- Energy companies in the Hauts-de-Seine department 144
The same list elsewhere in France
- Critical infrastructure operators in France 2,721
- Critical infrastructure operators in Île-de-France 780
- Critical infrastructure operators in Auvergne-Rhône-Alpes 299
- Critical infrastructure operators in Grand Est 257
- Critical infrastructure operators in Occitanie 216
- Critical infrastructure operators in Nouvelle-Aquitaine 209
- Critical infrastructure operators in Provence-Alpes-Côte d'Azur 200
- Critical infrastructure operators in Hauts-de-France 174
- Critical infrastructure operators in Pays de la Loire 127
- Critical infrastructure operators in Brittany 120
- Critical infrastructure operators in Normandy 103
- Critical infrastructure operators in the Bouches-du-Rhône department 98
- Critical infrastructure operators in the Rhône department 94
- Critical infrastructure operators in Centre-Val de Loire 87
- Critical infrastructure operators in the Nord department 87
- Critical infrastructure operators in Bourgogne-Franche-Comté 76
- Critical infrastructure operators in the Haute-Garonne department 64
- Critical infrastructure operators in the Gironde department 63
- Critical infrastructure operators in the Loire-Atlantique department 59
- Critical infrastructure operators in the Hérault department 57
- Critical infrastructure operators in the Seine-Saint-Denis department 53
- Critical infrastructure operators in the Seine-Maritime department 46
- Critical infrastructure operators in the Ille-et-Vilaine department 45
- Critical infrastructure operators in Paris 331