ERYTECH Pharma S.A.

Declaration of Voting Results & Voting Rights Announcements • Aug 8, 2023

Monthly information related to total number of voting rights and shares composing the share capital _July 31, 2023.

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
November 30, 2022	31 018 553	32 514 528	32 512 028
December 31, 2022	31 018 553	32 514 825	32 512 325
January 31, 2023	31 018 553	32 514 771	32 512 271
February 28, 2023	31 018 553	32 516 875	32 514 375
March 31, 2023	31 018 553	32 521 652	32 519 152
April 30, 2023	31 018 553	32 521 642	32 519 142
May 15, 2023	34 120 298	35 623 387	35 620 887
May 31, 2023	34 120 298	35 623 630	35 621 130
June 26, 2023	60 751 054	62 254 388	62 251 888
July 31, 2023	60 751 054	62 254 443	62 251 943

(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.