Chiesi was founded in 1935, but the process of internationalization of the brand did not start until the late ***. In the same period, Clenil – one of the most successful products developed by this firm - was launched on the market. Clenil is used to treat issues of the respiratory system such as asthma or airway inflammation. Not surprisingly, the company is now specialized in the production of drugs for the respiratory system as well as in the manufacture of medications for primary care, neonatology and rare diseases.  
Internationalization
The internationalization activities became more intense starting from the late ***, when the Group opened many affiliates worldwide. Currently, the importance of Chiesi on an international scale is also confirmed by its presence in the ranking of the leading Italian pharmaceutical companies in 2021.
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CHIESI Farmaceutici. (July 22, 2024). Annual revenue of the Italian pharmaceutical company Chiesi from 2009 to 2023 (in million euros) [Graph]. In ÌÇÐÄÆÆ½â°æ. Retrieved August 05, 2026, from /statistics/789009/worldwide-annual-turnover-of-leading-italian-pharmaceutical-company-chiesi/
CHIESI Farmaceutici. "Annual revenue of the Italian pharmaceutical company Chiesi from 2009 to 2023 (in million euros)." Chart. July 22, 2024. ÌÇÐÄÆÆ½â°æ. Accessed August 05, 2026. /statistics/789009/worldwide-annual-turnover-of-leading-italian-pharmaceutical-company-chiesi/
CHIESI Farmaceutici. (2024). Annual revenue of the Italian pharmaceutical company Chiesi from 2009 to 2023 (in million euros). ÌÇÐÄÆÆ½â°æ. ÌÇÐÄÆÆ½â°æ Inc.. Accessed: August 05, 2026. /statistics/789009/worldwide-annual-turnover-of-leading-italian-pharmaceutical-company-chiesi/
CHIESI Farmaceutici. "Annual Revenue of The Italian Pharmaceutical Company Chiesi from 2009 to 2023 (in Million Euros)." ÌÇÐÄÆÆ½â°æ, ÌÇÐÄÆÆ½â°æ Inc., 22 Jul 2024, /statistics/789009/worldwide-annual-turnover-of-leading-italian-pharmaceutical-company-chiesi/
CHIESI Farmaceutici, Annual revenue of the Italian pharmaceutical company Chiesi from 2009 to 2023 (in million euros) ÌÇÐÄÆÆ½â°æ, /statistics/789009/worldwide-annual-turnover-of-leading-italian-pharmaceutical-company-chiesi/ (last visited August 05, 2026)
Annual revenue of the Italian pharmaceutical company Chiesi from 2009 to 2023 (in million euros) [Graph], CHIESI Farmaceutici, July 22, 2024. [Online]. Available: /statistics/789009/worldwide-annual-turnover-of-leading-italian-pharmaceutical-company-chiesi/