ERYTECH Pharma S.A.

Declaration of Voting Results & Voting Rights Announcements • Dec 11, 2017

Monthly information related to total number of voting rights and shares composing the share capital –November 30, 2017

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
January 31, 2017	8 732 648	10 410 050	10 407 550
February 28, 2017	8 732 648	10 395 830	10 393 330
March 31, 2017	8 734 698	10 351 950	10 349 450
April 19, 2017	11 740 648(3)	13 303 800(3)	13 301 300(3)
April 30, 2017	11 743 148	13 303 549	13 301 049
May 31, 2017	11 744 148	13 304 550	13 302 050
June 30, 2017	11 744 448	13 298 756	13 296 256
July 31, 2017	11 744 448	13 300 266	13 297 766
August 31,2017	11 744 448	13 301 546	13 299 046
September 30, 2017	11 745 648	13 300 046	13 297 546
October 31, 2017	11 754 422	13 304 770	13 302 270
November 16, 2017	17 934 559(4)	19 484 907(4)	19 482 407(4)
November 30, 2017	17 935 659(5)	19 487 512	19 485 012

⁽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

⁽³⁾ The number of shares and voting rights raised following the issuance of 3 000 000 new shares (cf. Note d'opération Visa n°17-161 available on the Company's website)

• (4) The numbers of shares and voting rights raised following the issuance of 5 374 033 new shares on November 10, 2017 and of 806 104 new shares expected to be issued on November 16, 2017 (cf. Note d'opération Visa n°17-584 available on the Company's website).
• (5) The number of shares increased due to issuance of shares consequently to warrants exercises which a Board of Director will take notice of in the future.