Established in 2015, Stallergenes Greer combines a hundred years of allergy expertise of Greer in the United States with Stallergenes’ history of innovation in allergy immunotherapy (AIT or desensitisation) from a base in France.

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Our business

A leader in allergen immunotherapy

With more than a century of expertise in allergies and allergen immunotherapy (AIT), Stallergenes Greer is a leader in its field.

Stallergenes Greer, a fully integrated global biopharmaceutical company, specialises in the diagnosis and treatment of allergies through the research, development and commercialisation of AIT products and services for respiratory and food allergies.

The company’s product portfolio, which covers a broad range of administration modes (subcutaneous, sublingual drops and tablets for respiratory allergies, and oral immunotherapy for peanut allergies), offers healthcare professionals innovative, safe and effective solutions to improve life for people with allergies.

About allergen immunotherapy 

Allergen immunotherapy (AIT) is an allergy treatment designed to treat the underlying cause of the disease as well as have a carry-over effect on all symptoms. After an accurate diagnosis of the type of allergy and responsible allergens, patients, in line with their healthcare practitioner’s prescription, receive a targeted treatment. Through the repeated administration of specific allergens, the immune system builds resistance1 thus reducing symptoms when patients are exposed to the allergen in their environment.

A robust shareholding structure

Stallergenes Greer is a private company owned by interests associated with the Bertarelli family, which are advised by the B-FLEXION group. B-FLEXION is a private, entrepreneurial investment firm, delivering exceptional value over the generations, while also contributing positively to society.

B-FLEXION continues to drive expansion by growing operating businesses in transformative industries. In keeping with – and building upon – its heritage, these are principally in the fields of life sciences, healthcare services and digital health.

Chaired by Ernesto Bertarelli, B-FLEXION has offices across Europe and in the United States.


To learn more about Stallergenes Greer, read our 2023 Company report


1. Global Atlas of Allergy, EAACI 2014




Last updated on: 30/10/2023

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