ERYTECH Pharma S.A.

Declaration of Voting Results & Voting Rights Announcements • Jan 10, 2022

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

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, 2020	20 057 562	21 592 598	21 590 098
January 31, 2021	20 395 482	21 930 518	21 928 018
February 28, 2021	21 139 668	22 668 705	22 666 205
March 31, 2021	21 619 894	23 149 446	23 146 946
April 30, 2021	21 646 489	23 176 061	23 173 561
May 31, 2021	26 048 225	27 569 797	27 567 297
June 30, 2021	26 412 389	27 934 088	27 931 588
July 30, 2021	27 320 457	28 844 656	28 842 156
August 31, 2021	27 729 047	29 250 818	29 248 318
September 30, 2021	27 923 522	29 423 496	29 420 996
October 30, 2021	27 923 522	29 423 308	29 420 808
November 30, 2021	27 940 121	29 439 907	29 437 407
December 31, 2021	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.