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List of pharmaceutical companies in the Essonne department

Tamtam tracks 45 pharmaceutical companies headquartered in the Essonne department. This list ranks the 30 largest by number of employees on LinkedIn, led by LFB, Sebia and PMC Isochem. Their median headcount is 48. Half of them were founded in 2004 or later. The most common headquarters are Les Ulis (6), Massy (5) and Orsay (4).

🇫🇷 Essonne30 companiesUpdated Nov 11, 2026

The pharmaceutical companies in Essonne are primarily involved in medical manufacturing, biotechnology research, and chemical manufacturing. Many of them are mid-sized to large firms, with LFB leading in employee count with 2733, specializing in medicinal products for rare diseases. Other significant companies include Sebia, a global leader in in vitro diagnostics, PMC Isochem, which custom manufactures APIs, and PCAS, developing complex molecules for life sciences.

A notable pattern is the concentration of headquarters in Les Ulis, which hosts LFB, Eurobio Scientific FR, and CELLforCURE by Seqens, among others. There's also a strong presence of companies founded in the 1990s, such as LFB (1994) and DELPHARM BRÉTIGNY (1994), alongside more recent establishments like PMC Isochem (2017) and RegenLab France (2019).

#CompanyIndustryHeadquarters EmployeesFounded
1
LFBgroupe-lfb.com

Develops, manufactures, and markets medicinal products for serious, often rare diseases in Hemostasis, Immunology, and Intensive Care, with a focus on plasma-derived products and biotechnologies.

Pharmaceutical Manufacturing 🇫🇷 Les Ulis 2,733 1994
2
Sebiasebia.com

Global specialty in vitro diagnostic leader for screening and monitoring various diseases, including oncology, diabetes, and autoimmunity.

Medical Equipment Manufacturing 🇫🇷 Lisses 1,018 1967
3
PMC Isochempmcisochem.fr

Custom manufacturing of APIs, intermediates, and excipients with drug delivery solutions including Vitamin E TPGS and amino acid polymers for pharmaceuticals.

Chemical Manufacturing 🇫🇷 Vert-le-Petit 215 2017
4
PCASseqens.com

Develops and produces complex molecules using advanced technologies for global leaders in Life Sciences and Innovative Technologies. Part of a larger international group.

Chemical Manufacturing 🇫🇷 Longjumeau 213 1962
5
SOPHYSAsophysa.com

Develops neurosurgical implants, including adjustable valves for hydrocephalus and intracranial pressure monitoring systems, offering advanced solutions for neurological conditions.

Medical Equipment Manufacturing 🇫🇷 Orsay 195 1976
6
Eurobio Scientific FReurobio-scientific.com

Develops, manufactures, and commercializes in-vitro diagnostic products for hospitals and private medical biology laboratories, specializing in transplantation, infectious diseases, and life sciences.

Biotechnology Research 🇫🇷 Les Ulis 193 n/a
7
CELLforCURE by Seqenscellandgene.seqens.com

Manufacturing advanced therapy medicinal products specializing in autologous and allogeneic cell and gene solutions through comprehensive end-to-end services from phase I to commercialization.

Biotechnology Research 🇫🇷 Les Ulis 112 2014
8
Sebia Francesebia.com

Development and manufacturing of in vitro diagnostic tools for disease detection and monitoring, focusing on oncology, diabetes, and rare diseases.

Medical Equipment Manufacturing 🇫🇷 Lisses 106 1967
9
Cellforcurenovartis.fr

A facility in Europe specializing in large scale production of cell and gene therapies, offering services from development to commercialization

Biotechnology Research 🇫🇷 Les Ulis 104 2010
10
CERC (Cardiovascular European Research Center)cerc-europe.org

A leading European CRO founded by experienced physicians, specializing in clinical research, innovative techniques, and supporting young scientific leaders globally

Research Services 🇫🇷 Massy 84 2008
11
Löwenstein Medical Franceloewensteinmedical.com

Development and supply of reliable respiratory assistance devices for hospitals and home care, focusing on patient quality of life and support.

Medical Equipment Manufacturing 🇫🇷 Massy 72 1996
12
Véto-pharmaveto-pharma.com

Development, production, and distribution of innovative veterinary and bee health products, including global leadership in varroa mite treatments.

Pharmaceutical Manufacturing 🇫🇷 Palaiseau 69 1982
13
DELPHARM BRÉTIGNYdelpharm.com

A major player in pharmaceutical contract manufacturing, contributing to global healthcare with a focus on quality, punctuality, and employee development

Pharmaceutical Manufacturing 🇫🇷 Brétigny-sur-Orge 58 1994
14
ISOCHEM SASpmcisochem.fr

A global leader in fine chemicals and active pharmaceutical ingredients, offering custom synthesis and high-tech manufacturing services to various industries

Chemical Manufacturing 🇫🇷 Vert-le-Petit 52 1974
15
RegenLab Franceregenlab.com

Design and manufacture high-quality medical devices for cell therapies and platelet-rich plasma preparation, serving over two million patients globally.

Medical Equipment Manufacturing 🇫🇷 Les Ulis 48 2019

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16
Enaleesenalees.com

A biotech company in Europe specialized in developing and marketing lyophilized molecular diagnostic tests for animal healthcare, using LAMP technology

Biotechnology Research 🇫🇷 Évry-Courcouronnes 42 2016
17
Sensomesensome.com

Innovative start-up developing remote monitoring technology to transform invasive medical devices into connected healthcare devices EN ISO 13485:2016 certified

Medical Equipment Manufacturing 🇫🇷 Massy 40 2014
18
LAMIDEY NOURY MEDICALlamidey-noury.com

Specializing in electro-surgery for 70 years, we offer innovative solutions like vessel sealing, plasma saline resection, and partnerships for robotized laparoscopic surgery globally

Medical Equipment Manufacturing 🇫🇷 Verrieres Le Buisson 37 1947
19
Eurofins BIO-ECbio-ec.fr

Specializing in evaluating cosmetic, dermatological products, medical devices, and supplements through ex vivo and in vivo studies, absorption analysis, spectroscopy, and Cosmetogenomics Contact for personalized studies

Research Services 🇫🇷 Longjumeau 33 1998
20
Hybrigenics Serviceshybrigenics-services.com

provides advanced technologies for studying protein interactions, target identification, nanobody selection, and supports drug discovery and molecular mechanism research

Biotechnology Research 🇫🇷 Évry-Courcouronnes 30 1998
21
LFB-BIOTECHNOLOGIES

LFB-BIOTECHNOLOGIES is a research company in France specializing in biotechnology, located in ZA DE COURTABOEUF LES ULIS

Research Services 🇫🇷 Les Ulis 26 n/a
22
HEPHAISTOS-Pharmahephaistos-pharma.fr

HEPHAISTOS-Pharma is a biotechnology startup developing anti-tumor immunotherapies to revolutionize cancer treatments by enhancing monoclonal antibody effectiveness against incurable tumors

Biotechnology Research 🇫🇷 Orsay 18 2018
23
MITEM Pharmamitempharma.com

French pharmaceutical company focused on essential therapeutic medicines, committed to patient needs and improving accessibility of neglected treatments.

Pharmaceutical Manufacturing 🇫🇷 Massy 18 2022
24
Gimopharmnovovitae.fr

Gimopharm specializes in providing pharmaceutical and cosmetic industry services such as quality control analysis, analytical development, stability studies, and Galenic formulation

Pharmaceutical Manufacturing 🇫🇷 Longjumeau 17 1999
25
MEGA BIOPHARMAmegabiopharma.com

French biotechnology company specializing in marine resources, developing Bionacre®, a natural biomaterial extracted from nacre for innovative applications.

Biotechnology Research 🇫🇷 Crosne 15 n/a
26
Mead Johnson Nutrition - Francenutramigen.fr

Specializes in infant nutrition focused on combating cow's milk protein allergies to improve health and well-being of infants.

Pharmaceutical Manufacturing 🇫🇷 Massy 11 n/a
27
Blue Bees Therapeuticsbbtx.fr

Development of first-in-class immunotherapies targeting cancer by stimulating anti-tumor immune response through novel antibody technology.

Biotechnology Research 🇫🇷 Orsay 11 2022
28
LPS-BioScienceslpsbiosciences.com

Provides endotoxin analysis and extraction services for human and animal health, cosmetics, and food industries, focusing on bacterial detection and vaccine adjuvant research.

Biotechnology Research 🇫🇷 Orsay 8 2011
29
Drugabilisdrugabilis.com

Specializing in solid form characterization and formulation development for human and animal health, providing experimental support and consulting services to biotech and pharma companies

Pharmaceutical Manufacturing 🇫🇷 Villejust 8 2004
30
MicroXpacemicroxpace.com

A DeepTech company specializing in microbial solutions for health and sustainable food production, focusing on combating infectious diseases in aquaculture and poultry industries

Biotechnology Research 🇫🇷 Évry-Courcouronnes 8 2022

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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 Nov 11, 2026.

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