ERYTECH Pharma S.A.

Declaration of Voting Results & Voting Rights Announcements • Dec 6, 2022

Monthly information related to total number of voting rights and shares composing the share capital _October 30, 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
February 28, 2022	31 018 553	32 518 547	32 516 047
March 31, 2022	31 018 553	32 518 547	32 516 047
April 30, 2022	31 018 553	32 518 547	32 516 047
May 31, 2022	31 018 553	32 518 547	32 516 047
June 30, 2022	31 018 553	32 520 107	32 517 607
July 31, 2022	31 018 553	32 521 126	32 518 626
August 31, 2022	31 018 553	32 508 024	32 505 524
September 30, 2022	31 018 553	32 507 992	32 505 492
October 30, 2022	31 018 553	32 507 991	32 505 491

(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.