Monthly information related to total number of voting rights and shares composing the share capital – January 31, 2021

Monthly information related to total number of voting rights and shares composing the share capital – January 31, 2021.Article 223-16 of general regulation of French Autorité des Marchés Financiers
Lyon – FranceListing 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 (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.AttachmentCP_Déclaration Droits de Vote 31 01 2021 ENG-2