ERYTECH Pharma S.A.

Declaration of Voting Results & Voting Rights Announcements • Feb 8, 2022

Monthly information related to total number of voting rights and shares composing the share capital – January 31, 2022.

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

Listing markets: Euronext Paris from Euronext (Market segment C - ISIN Code: FR0011471135- Symbol: ERYP) & Nasdaq Global Select Market in the United-States (Symbol : ERYP) Website : www.erytech.com

Date	Total of shares composing the share capital	Total of brut (1) voting rights	Total of net (2) voting rights
December 31, 2021	31 018 553	32 518 339	32 515 839
January 31, 2022	31 018 553	32 518 339	32 515 839

(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.