Founded in 1904 by R.T. Greer, a collecter of source materials (i.e. : roots, herbs, pollens), Greer became among the leading providers of allergenic extracts in the United States. Committed to clinically relevant research that assists physicians with the best possible allergy treatment for their patients, Greer was organized around development of improved technologies for skin testing and explore alternative methods for delivering treatment. Following an earlier collaboration wth the French pharmaceutical company headquartered in Antony, Hauts-de-Seine, in 2015 Stallergenes and US-based Greer Laboratories, Inc. merged to form Stallergenes Greer headquartered in London, UK
