| # | Company | Employees |
|---|---|---|
| 1 |
UGECAM ALSACEgroupe-ugecam.fr
A private non-profit organization in Alsace managing SSR facilities and medical-social structures, offering specialized care for all ages and disabilities |
494 |
| 2 |
Groupe OTEote-ingenierie.com
Multidisciplinary building engineering firm providing smart, long-lasting solutions across diverse sectors including industrial, pharmaceutical, data centers, and healthcare, combining advanced techniques and specialized entities. |
341 |
| 3 |
BIOSYNEX PHARMAbiosynex.com
Develops and manufactures rapid diagnostic solutions alongside wellness brands specializing in eye care, dermo-cosmetics, and pest protection for global healthcare markets. |
225 |
| 4 |
Transgenetransgene.com
Biotechnology company specializing in developing innovative cancer immunotherapies to treat cancer effectively and provide hope for patients |
203 |
| 5 |
International Space Universityisunet.edu
Specializing in space education, this company offers graduate-level training in various disciplines related to space programs and enterprises, preparing future leaders for the global space community |
194 |
| 6 |
Auchan Illkirch Baggersee
This page provides information about a hypermarket located in Illkirch Baggersee, offering a wide range of products and services |
187 |
| 7 |
ICube Strasbourgicube.unistra.fr
Researching engineering, computer science, and imaging with multiple university and national agency oversight. |
183 |
| 8 |
IUT Robert SCHUMANiutrs.unistra.fr
The Institut universitaire de technologie offers BUT and professional Bachelor's degree programs within the University of Strasbourg campus in Illkirch-Graffenstaden, France |
144 |
| 9 |
Sartorius Polypluspolyplus-sartorius.com
Provider of advanced biologic and gene therapy production solutions, including transfection reagents, custom plasmid design, and global support services. |
102 |
| 10 |
KIRN PRODUCTION
Food production company located in Illkirch Graffenstaden, France, specializing in manufacturing and processing food products for various markets. |
97 |
| 11 |
Ville d'Illkirch-Graffenstadenillkirch.eu
A bustling city in Bas-Rhin, Illkirch-Graffenstaden combines tradition with modernity, offering a vibrant economic, commercial, and cultural environment |
84 |
| 12 |
Habitat de l'Illhabitatdelill.com
Cooperative providing rental management, home ownership assistance, and condominium management with focus on community and innovative residential support. |
79 |
| 13 |
BIOSYNEX Diagnosticsbiosynex.com
Manufacturer and provider of innovative rapid membrane tests for in-vitro diagnostics, supporting fast and accurate medical decision-making. |
79 |
| 14 |
CTI STRASBOURGameli.fr
The CTI Strasbourg is part of the French social security system, managing and hosting IT infrastructure for health insurance services |
55 |
| 15 |
NEUROFITneurofit.com
A pre-clinical CRO based in France, offering disease models and screening assays in psychiatry, neurology, diabetes, and pain for pharmaceutical and biotech companies |
46 |
| 16 | 46 | |
| 17 |
CEFPPA Adrien Zellercefppa.eu
This establishment provides alternating training in Hospitality and Catering from CAP to BTS, alongside offering professional development courses for industry employees |
43 |
| 18 |
MIM - Groupe d'Imagerie Médicaleradiologie-mim.fr
A group of 24 radiologists and over 80 staff members providing cutting-edge medical imaging services across 6 sites in Strasbourg |
42 |
| 19 |
BDE SPORTSbde-sports.com
Distribution of international sports brands and own products, providing high-quality equipment for professional athletes and everyday sports enthusiasts. |
40 |
| 20 |
ROMAF - Relais d'Or Miko Alsace Franche Comtéwebshop.relaisdor.fr
Specializing in purchasing, marketing, and distributing a variety of food products including frozen, fresh, ice cream, and groceries in Eastern France Delivery in 7 departments |
37 |
| 21 | 36 | |
| 22 |
Domain Therapeuticsdomaintherapeutics.com
Develops innovative immunotherapies targeting GPCRs to treat cancer, using a precise biomarker strategy for specific patient needs and individual cancer signatures. |
36 |
| 23 |
ESARIS INDUSTRIESesaris.fr
Supply and assembly of electromechanical components and sub-assemblies for aeronautics, railway, defense, electrical distribution, transport, and industrial sectors. |
35 |
| 24 |
Air Cloudair-cloud.fr
Support and guidance for deploying Microsoft cloud applications, user training, security control, budget management, and infrastructure optimization for businesses. |
35 |
| 25 |
ACST - Association de Conseil en Santé au Travailacst-strasbourg.com
A occupational health and prevention service working to preserve workers' physical and mental health, provide advice on workplace risks, and monitor worker health |
34 |
| 26 |
ICube-SERTITsertit.unistra.fr
A platform within the University of Strasbourg's ICube laboratory that extracts and formats information from Earth Observation system image data |
27 |
| 27 |
VALBLORvalblor.com
Printing offset, digital, packaging, labels, flexible packaging, communication agency, design studio, event agency, merchandising services. |
27 |
| 28 |
BLACKLEAFblackleaf.fr
This start-up utilizes an eco-friendly process to produce Few-Layer Graphene, making it affordable for industries with high-quality, innovative applications |
26 |
| 29 |
CFPPE, Centre de Formation des Professionnels de la Petite Enfancecfppe.fr
The company offers professional training for early childhood professionals in Strasbourg, including qualification programs and continuous education, held in a serene environment |
19 |
| 30 |
GAZOMATgazomat.com
Specializing in electronic detection equipment for gas distribution networks and operator protection, this company offers innovative solutions, technical expertise, and reliable support worldwide |
19 |
| 31 |
CEPhI Comité des étudiants en pharmacie industriellecephi.fr
A French non-profit association connecting pharmacy students with the pharmaceutical industry through events and interactions to help students make informed career choices |
18 |
| 32 |
EYLIOeyliopharma.com
Specializing in QP declaration, batch confirmation, and certification, regulatory expertise, quality audits, and project management services for various industries |
17 |
| 33 |
Serendip innovationsserendipinnovations.com
Development of plant-based platform for stabilizing and delivering biological molecules, enabling targeted therapies and cancer vaccine innovations through partnerships. |
15 |
| 34 | 15 | |
| 35 |
ZEN-CONSEILzen-conseil.com
Specializing in data management, the company provides consulting and services for all aspects of data management, from collection to visualization, using various technologies |
14 |
| 36 |
Dynacuredynacure.com
A clinical-stage company developing novel therapies for rare diseases with limited treatment options, focusing on Myotubular and Centronuclear Myopathies and Hereditary Spastic Paraplegias |
14 |
| 37 |
ADEX LOGISTIQUEadex-logistique.fr
Provides comprehensive transport and logistics services focusing on specialized delivery solutions to meet diverse client needs efficiently. |
13 |
| 38 |
Bcell Designb-cell-design.com
Monoclonal antibody expert based in France, specializing in IVD, research services, and therapeutic antibody development for drug development and diagnostics purposes |
12 |
| 39 |
CHIRAL TECHNOLOGIES EUROPEchiraltech.com
A research company located in Illkirch Graffenstaden, France, specializing in chiral technologies and solutions |
12 |
| 40 |
Club Entreprise Illkirch-Graffenstadenceig.fr
The company organizes networking events and activities to connect local businesses, sponsors, and partners through sports and social projects |
12 |
| 41 |
ARIS Informatique - Prestataire informatiquearis-informatique.fr
Specializing in digital transformation, the company offers tailored IT solutions including servers, network infrastructure, security, cloud services, VoIP, and website development to support clients long-term |
9 |
| 42 |
Woodlightwoodlight.fr
Research and development startup creating bioluminescent plants to provide sustainable lighting solutions for city streets, interior decoration, and green urban spaces. |
9 |
| 43 |
ATIK EXPRESS
A transportation company based in France that specializes in trucking and rail services from their location in Illkirch Graffenstaden |
8 |
| 44 | 8 | |
| 45 |
Stis Internationalstis-international.com
Specializing in transport services in Eastern Europe, the company aims to provide efficient and reliable logistics solutions for various industries |
7 |
| 46 |
IMS (Institut du Médicament de Strasbourg)ims.unistra.fr
Conducting advanced preclinical pharmaceutical research while promoting technological innovation through startup creation and training future researchers in drug development and innovation management. |
6 |
| 47 |
INNOXA LABORATOIRESlaboratoires-innoxa.com
Focuses on developing innovative ocular care products for dry eyes, providing non-prescription solutions such as sprays and drops for eye health. |
5 |
| 48 |
Odimma Therapeuticsodimma-therapeutics.com
French biotech company focused on personalized cancer immunotherapy, leveraging neoantigens to improve efficacy of current therapies for hard-to-treat cancers Entering clinic soon |
4 |
| 49 |
Centre d'Analyses et de Recherches (CAR)car-analyse.com
The company specializes in monitoring and analyzing natural waters, clean water quality for consumption or recreation, wastewater discharges, Legionella detection, and healthcare hygiene |
2 |
| 50 |
SMART RECsmart-rec.fr
Founded in September 2017, SMART-REC is a French distributor offering new and refurbished smartphones to consumers and businesses |
2 |
| 51 |
DOUBLE CŒURdouble-coeur.fr
High-precision metal part fabrication using laser welding and additive manufacturing for aerospace and energy sectors, focusing on critical industrial production series. |
1 |
| 52 |
PHARMACIE DE LA NIEDERBOURGpharmaciedelaniederbourg.fr
A pharmaceutical company located in Illkirch Graffenstaden, France, specializing in providing pharmaceutical products and services |
1 |
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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 Oct 24, 2026.
The same list elsewhere in France
- The largest companies in France 75,805
- The largest companies in Île-de-France 30,863
- The largest companies in Auvergne-Rhône-Alpes 8,971
- The largest companies in Provence-Alpes-Côte d'Azur 5,836
- The largest companies in Occitanie 4,823
- The largest companies in Grand Est 4,506
- The largest companies in Nouvelle-Aquitaine 4,424
- The largest companies in Hauts-de-France 3,752
- The largest companies in Pays de la Loire 3,573
- The largest companies in Brittany 2,535
- The largest companies in Normandy 1,814
- The largest companies in Bourgogne-Franche-Comté 1,549
- The largest companies in Centre-Val de Loire 1,385
- The largest companies in Paris 19,499
- The largest companies in Lyon 2,238
- The largest companies in Marseille 1,366
- The largest companies in Toulouse 1,331
- The largest companies in Bordeaux 928
- The largest companies in Nantes 796
- The largest companies in Lille 731
- The largest companies in Boulogne-Billancourt 701
- The largest companies in Montpellier 633
- The largest companies in Aix-en-Provence 571
- The largest companies in Strasbourg 547