| # | Company | Employees |
|---|---|---|
| 1 | 2,940 | |
| 2 |
Lycée Saint-Exupéry (Marseille)lyc-stexupery.ac-aix-marseille.fr
A public general and technological high school offering preparation for various baccalaureate exams, BTS programs, and entrance exams for management Grandes Écoles |
176 |
| 3 |
CIMLciml.univ-mrs.fr
Research institute focused on immunology-based research areas like cell activation, host-pathogen interactions, and cell death, associated with prominent scientific organizations |
152 |
| 4 |
CRCM - Centre de Recherche en Cancérologie de Marseillecrcm-marseille.fr
A cancer research center in Marseille conducting fundamental, translational, and clinical research, with international collaborations and emphasis on training programs |
144 |
| 5 |
Laboratoire d'Astrophysique de Marseillelam.fr
Astrophysics research unit in Marseille, France, comprising researchers, doctoral and post-doctoral scholars, engineers, technicians, and administrative staff |
139 |
| 6 |
Institut Fresnelfresnel.fr
A research institute in Marseille with approximately 195 members dedicated to photonics, electromagnetism, signal/image analysis, and various other research fields |
104 |
| 7 |
Mediterranean Institute of Oceanography MIOmio.osupytheas.fr
A research laboratory under joint direction of universities and institutes, specializing in marine biology, ecology, and oceanic system responses to global changes |
104 |
| 8 | 101 | |
| 9 |
IBDMibdm.univ-mrs.fr
An internationally renowned research institute exploring developmental biology, diseases, and therapeutic applications through interdisciplinary approaches and supporting startups and quality education |
91 |
| 10 |
Centre de Physique des Particules de Marseille (CPPM; CNRS/IN2P3 - Aix-Marseille University)in2p3.fr
Fundamental research on elementary particles, their interactions, astroparticle physics, and observational cosmology to understand the universe. |
87 |
| 11 |
Institut de Neurosciences de la Timoneint.univ-amu.fr
A large research center in Marseille focusing on neuroscience, with research teams studying various topics using molecular, computational, and interdisciplinary approaches |
79 |
| 12 |
C2VNc2vn.univ-amu.fr
Research center focused on cardiovascular diseases, prevention through nutrition. Nine research teams, four advanced technology platforms. Major French research player. |
71 |
| 13 |
SESSTIMsesstim.univ-amu.fr
Research laboratory focusing on health economics, social sciences, medical information processing, cancer, infectious diseases, and addiction through university teaching and international scientific partnerships. |
65 |
| 14 |
SATT Sud-Estsattse.com
Facilitating technology transfer by connecting researchers and businesses, managing patents, and licensing innovations in South France and Corsica. |
62 |
| 15 |
Marseille Medical Geneticsmarseille-medical-genetics.org
A genetics company located in Marseille, France specializing in medical genetics services and research |
61 |
| 16 |
Institut des Sciences du Mouvement (ISM-UMR7287) Aix Marseille Université & CNRSism.univ-amu.fr
The Institut des Sciences du Mouvement focuses on interdisciplinary research on the physiology, psychology, and sociology of human movement with around 150 staff members |
53 |
| 17 |
Institute of NeuroPhysioPathology (INP)inp.univ-amu.fr
The Institute of NeuroPhysiopathology conducts research on neurodegenerative diseases, neural network plasticity, and therapeutic strategies involving stem cells and drug delivery methods |
46 |
| 18 |
Laboratoire de Chimie de l'Environnementlce.univ-amu.fr
The company conducts research on chemical kinetics and mechanisms of contaminant transformation, develops innovative analytical methods, and collaborates with various sectors for environmental quality management |
46 |
| 19 |
CINaM, Centre Interdisciplinaire de Nanoscience de Marseillecinam.univ-mrs.fr
Researching multi-scale material structures, including molecules, atomic clusters, nanoparticles, thin films, natural and man-made mesoscopic objects, focusing on nanomaterial design and nanometer-scale phenomena. |
38 |
| 20 |
AFMB CNRS UMR7257univ-mrs.fr
A structural biology laboratory in Marseilles, France, studying protein architecture, macromolecular interactions, and analyzing big data from genome sequencing centers |
35 |
| 21 |
IUSTIiusti.cnrs.fr
IUSTI laboratory is a CNRS-Aix Marseille University research unit focused on engineering sciences, with research in mechanics, energy, and applications in various industries |
35 |
| 22 |
Protisvalorprotisvalor.com
A research valuation subsidiary supporting laboratories and researchers with legal, administrative, financial, and intellectual property services at Aix-Marseille University |
32 |
| 23 |
Groupe Résurgencesresurgences.eu
The company consists of three branches focusing on job training in digital fields, training in editing and web design, and research and development for public policy evaluation |
29 |
| 24 |
Lycée Privé - Fondation Don Boscodonbosco-marseille.fr
Private polyvalent high school providing a well-rounded education to students |
28 |
| 25 |
ITCitc-fr.com
ITC is a French engineering and inspection firm specializing in thermography for a range of services including electrical, mechanical, and building inspections worldwide |
26 |
| 26 |
Aix Marseille Strategy Consulting Group (AMS CG)jda-conseil.fr
An association run by students at AMSE, providing tailored solutions to businesses and institutions in finance, marketing, data science, and economic analysis |
17 |
| 27 |
YELENyelen-analytics.com
A provider of customized analysis, development services, and biochemical reagents for research, helping businesses validate productions, improve processes, and access new markets |
10 |
| 28 |
SYNCROSOME - Cardiology Preclinical serviceetap-lab.com
A preclinical CRO specializing in in vivo efficacy studies for drug discovery companies, offering disease models, biomarkers, and tailored experimental protocols |
10 |
| 29 |
Biomeostasisbiomeostasis.com
A leading Preclinical CRO specializing in in vivo research services for metabolic, gastrointestinal, and age-related diseases, offering efficacy assessments and mechanism of action studies |
8 |
| 30 |
THELONIUS MINDtheloniusmind.com
A consulting company of experienced experts in drug development for neurodegenerative and rare diseases, offering integrated solutions to healthcare industry clients |
7 |
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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 8, 2026.
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