ERYTECH Pharma S.A.

Declaration of Voting Results & Voting Rights Announcements • Mar 5, 2024

Monthly information related to total number of voting rights and shares composing the share capital - February 29, 2024

Article 223-16 of general regulation of French Autorité des Marchés Financiers

Listing markets: Euronext Paris from Euronext (Market segment C - ISIN Code: FR001400K4B1- Symbol: PHXM) & Nasdaq Global Select Market in the United-States (Symbol: PHXM) Website : www.phaxiam.com

Date	Total of shares composing the share capital	Total of brut (1) voting rights	Total of net (2) voting rights
December 31, 2023	6 075 105	6 226 982	6 226 733
January 31, 2024	6 075 105	6 227 002	6 226 753
February 29, 2024	6 075 105	6 226 951	6 226 702

(1) Gross voting rights number (or « theoretical » voting rights) is used as a basis for calculating the crossing of the threshold. In accordance with article 223-11 of general regulation of Autorité des Marchés Financiers, this number is calculated on the basis of all shares carrying the single and double voting rights, including shares without voting rights.

(2) Without treasury shares.