# 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).

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).

🇫🇷 Essonne · 30 companies · Updated Nov 11, 2026

| # | Company | Industry | Headquarters | Employees | Founded |
|---|---|---|---|---|---|
| 1 | [LFB](https://www.tamtam.ai/c/lfb) (groupe-lfb.com)<br>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 | [Sebia](https://www.tamtam.ai/c/sebia) (sebia.com)<br>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 Isochem](https://www.tamtam.ai/c/pmc-isochem) (pmcisochem.fr)<br>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 | [PCAS](https://www.tamtam.ai/c/pcas) (seqens.com)<br>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 | [SOPHYSA](https://www.tamtam.ai/c/sophysa) (sophysa.com)<br>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 FR](https://www.tamtam.ai/c/eurobio-scientific-fr) (eurobio-scientific.com)<br>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 |  |
| 7 | [CELLforCURE by Seqens](https://www.tamtam.ai/c/cellforcure-by-seqens) (cellandgene.seqens.com)<br>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 France](https://www.tamtam.ai/c/sebia-france) (sebia.com)<br>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 | [Cellforcure](https://www.tamtam.ai/c/cellforcure) (novartis.fr)<br>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)](https://www.tamtam.ai/c/cerc-cardiovascular-european-research-center) (cerc-europe.org)<br>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 France](https://www.tamtam.ai/c/lowenstein-medical-france) (loewensteinmedical.com)<br>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-pharma](https://www.tamtam.ai/c/veto-pharma) (veto-pharma.com)<br>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 BRÉTIGNY](https://www.tamtam.ai/c/delpharm-bretigny) (delpharm.com)<br>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 SAS](https://www.tamtam.ai/c/isochem-sas) (pmcisochem.fr)<br>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 France](https://www.tamtam.ai/c/regenlab-france) (regenlab.com)<br>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 |
| 16 | [Enalees](https://www.tamtam.ai/c/enalees) (enalees.com)<br>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 | [Sensome](https://www.tamtam.ai/c/sensome) (sensome.com)<br>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 MEDICAL](https://www.tamtam.ai/c/lamidey-noury-medical) (lamidey-noury.com)<br>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-EC](https://www.tamtam.ai/c/eurofins-bio-ec) (bio-ec.fr)<br>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 Services](https://www.tamtam.ai/c/hybrigenics-services) (hybrigenics-services.com)<br>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](https://www.tamtam.ai/c/lfb-biotechnologies)<br>LFB-BIOTECHNOLOGIES is a research company in France specializing in biotechnology, located in ZA DE COURTABOEUF LES ULIS | Research Services | 🇫🇷 Les Ulis | 26 |  |
| 22 | [HEPHAISTOS-Pharma](https://www.tamtam.ai/c/hephaistos-pharma) (hephaistos-pharma.fr)<br>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 Pharma](https://www.tamtam.ai/c/mitem-pharma) (mitempharma.com)<br>French pharmaceutical company focused on essential therapeutic medicines, committed to patient needs and improving accessibility of neglected treatments. | Pharmaceutical Manufacturing | 🇫🇷 Massy | 18 | 2022 |
| 24 | [Gimopharm](https://www.tamtam.ai/c/gimopharm) (novovitae.fr)<br>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 BIOPHARMA](https://www.tamtam.ai/c/mega-biopharma) (megabiopharma.com)<br>French biotechnology company specializing in marine resources, developing Bionacre®, a natural biomaterial extracted from nacre for innovative applications. | Biotechnology Research | 🇫🇷 Crosne | 15 |  |
| 26 | [Mead Johnson Nutrition - France](https://www.tamtam.ai/c/mead-johnson-nutrition-france) (nutramigen.fr)<br>Specializes in infant nutrition focused on combating cow's milk protein allergies to improve health and well-being of infants. | Pharmaceutical Manufacturing | 🇫🇷 Massy | 11 |  |
| 27 | [Blue Bees Therapeutics](https://www.tamtam.ai/c/blue-bees-therapeutics) (bbtx.fr)<br>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-BioSciences](https://www.tamtam.ai/c/lps-biosciences) (lpsbiosciences.com)<br>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 | [Drugabilis](https://www.tamtam.ai/c/drugabilis) (drugabilis.com)<br>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 | [MicroXpace](https://www.tamtam.ai/c/microxpace) (microxpace.com)<br>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 |

## 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.

## More company lists in the Essonne department

- [The largest companies in the Essonne department](https://www.tamtam.ai/l/largest-companies-essonne) (1,149)
- [Companies with in-house R&D in the Essonne department](https://www.tamtam.ai/l/r-and-d-companies-essonne) (198)
- [Multinational companies in the Essonne department](https://www.tamtam.ai/l/multinational-companies-essonne) (156)
- [Manufacturers in the Essonne department](https://www.tamtam.ai/l/manufacturers-essonne) (127)
- [Hardware manufacturers in the Essonne department](https://www.tamtam.ai/l/hardware-companies-essonne) (114)
- [Distributors and wholesalers in the Essonne department](https://www.tamtam.ai/l/distributors-and-wholesalers-essonne) (76)
- [IT Services and IT Consulting companies in the Essonne department](https://www.tamtam.ai/l/it-services-and-it-consulting-companies-essonne) (70)
- [Professional services firms in the Essonne department](https://www.tamtam.ai/l/professional-services-firms-essonne) (68)
- [Public sector organisations in the Essonne department](https://www.tamtam.ai/l/public-sector-organisations-essonne) (66)
- [Aerospace and defence companies in the Essonne department](https://www.tamtam.ai/l/aerospace-and-defense-companies-essonne) (65)
- [IT services companies in the Essonne department](https://www.tamtam.ai/l/it-services-companies-essonne) (60)
- [Retail chains in the Essonne department](https://www.tamtam.ai/l/retail-chains-essonne) (59)
- [Construction companies in the Essonne department](https://www.tamtam.ai/l/construction-companies-essonne) (56)
- [Software Development companies in the Essonne department](https://www.tamtam.ai/l/software-development-companies-essonne) (51)
- [Electronics and semiconductor companies in the Essonne department](https://www.tamtam.ai/l/electronics-companies-essonne) (44)
- [Research institutes in the Essonne department](https://www.tamtam.ai/l/research-institutes-essonne) (42)
- [Events Services companies in the Essonne department](https://www.tamtam.ai/l/events-services-companies-essonne) (41)
- [SaaS companies in the Essonne department](https://www.tamtam.ai/l/saas-companies-essonne) (41)
- [Consulting firms in the Essonne department](https://www.tamtam.ai/l/consulting-firms-essonne) (40)
- [Family-owned companies in the Essonne department](https://www.tamtam.ai/l/family-owned-companies-essonne) (38)
- [Contract manufacturers in the Essonne department](https://www.tamtam.ai/l/contract-manufacturers-essonne) (35)
- [Research Services companies in the Essonne department](https://www.tamtam.ai/l/research-services-companies-essonne) (35)
- [Critical infrastructure operators in the Essonne department](https://www.tamtam.ai/l/critical-infrastructure-operators-essonne) (32)
- [Education providers in the Essonne department](https://www.tamtam.ai/l/education-companies-essonne) (30)

## The same list elsewhere in France

- [Pharmaceutical companies in France](https://www.tamtam.ai/l/pharmaceutical-companies-france) (1,437)
- [Pharmaceutical companies in Île-de-France](https://www.tamtam.ai/l/pharmaceutical-companies-ile-de-france) (523)
- [Pharmaceutical companies in Auvergne-Rhône-Alpes](https://www.tamtam.ai/l/pharmaceutical-companies-auvergne-rhone-alpes) (262)
- [Pharmaceutical companies in the Rhône department](https://www.tamtam.ai/l/pharmaceutical-companies-rhone) (134)
- [Pharmaceutical companies in the Hauts-de-Seine department](https://www.tamtam.ai/l/pharmaceutical-companies-hauts-de-seine) (118)
- [Pharmaceutical companies in Grand Est](https://www.tamtam.ai/l/pharmaceutical-companies-grand-est) (110)
- [Pharmaceutical companies in Provence-Alpes-Côte d'Azur](https://www.tamtam.ai/l/pharmaceutical-companies-provence-alpes-cote-dazur) (104)
- [Pharmaceutical companies in Occitanie](https://www.tamtam.ai/l/pharmaceutical-companies-occitanie) (101)
- [Pharmaceutical companies in Nouvelle-Aquitaine](https://www.tamtam.ai/l/pharmaceutical-companies-nouvelle-aquitaine) (72)
- [Pharmaceutical companies in the Bouches-du-Rhône department](https://www.tamtam.ai/l/pharmaceutical-companies-bouches-du-rhone) (56)
- [Pharmaceutical companies in Hauts-de-France](https://www.tamtam.ai/l/pharmaceutical-companies-hauts-de-france) (53)
- [Pharmaceutical companies in Pays de la Loire](https://www.tamtam.ai/l/pharmaceutical-companies-pays-de-la-loire) (48)
- [Pharmaceutical companies in the Isère department](https://www.tamtam.ai/l/pharmaceutical-companies-isere) (47)
- [Pharmaceutical companies in the Hérault department](https://www.tamtam.ai/l/pharmaceutical-companies-herault) (44)
- [Pharmaceutical companies in the Val-de-Marne department](https://www.tamtam.ai/l/pharmaceutical-companies-val-de-marne) (43)
- [Pharmaceutical companies in Bourgogne-Franche-Comté](https://www.tamtam.ai/l/pharmaceutical-companies-bourgogne-franche-comte) (37)
- [Pharmaceutical companies in Brittany](https://www.tamtam.ai/l/pharmaceutical-companies-brittany) (37)
- [Pharmaceutical companies in Centre-Val de Loire](https://www.tamtam.ai/l/pharmaceutical-companies-centre-val-de-loire) (37)
- [Pharmaceutical companies in the Bas-Rhin department](https://www.tamtam.ai/l/pharmaceutical-companies-bas-rhin) (36)
- [Pharmaceutical companies in the Gironde department](https://www.tamtam.ai/l/pharmaceutical-companies-gironde) (35)
- [Pharmaceutical companies in the Haute-Garonne department](https://www.tamtam.ai/l/pharmaceutical-companies-haute-garonne) (35)
- [Pharmaceutical companies in the Alpes-Maritimes department](https://www.tamtam.ai/l/pharmaceutical-companies-alpes-maritimes) (34)
- [Pharmaceutical companies in Paris](https://www.tamtam.ai/l/pharmaceutical-companies-paris) (229)
- [Pharmaceutical companies in Lyon](https://www.tamtam.ai/l/pharmaceutical-companies-lyon) (68)

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Source: https://www.tamtam.ai/l/pharmaceutical-companies-essonne