Circassia is a pharmaceutical company that innovates products for respiratory diseases. Circassia was established in 2006 in Morrisville, U.S. In March 2014 they completed an initial public offering on the London Stock Exchange.The product Tudorza is marketed by Circassia which is a product used to treat COPD chronic obstructive pulmonary disease.Circassia collaborates with Astra Zeneca which helps them promote Tudorza and it gives them rights to Duaklir® which has increased their sales majorly. Also in 2015, they completed acquisitions with Aerocrine and Prosonix which helps them to commercialize their products and broaden their pipelines.