ERYTECH Pharma S.A.

Declaration of Voting Results & Voting Rights Announcements • May 5, 2017

Information related to total number of voting rights and shares composing the share capital – 30 April 2017

Article 223-16 of general regulation of French Autorité des Marchés Financiers Lyon - France

Listing market: Euronext Paris from Euronext Market segment : segment C

ISIN Code : FR0011471135

website : www.erytech.com

Date	Total of shares composing the share capital	Total of brut(1) voting rights	Total of net(2) voting rights
01 January 2017	8 732 648	10 410 050	10 407 550
28 February 2017	8 732 648	10 395 830	10 393 330
31 March 2017	8 734 698	10 351 950	10 349 450
19 April 2017	11 740 648(3)	13 303 800	13 301 300
30 April 2017	11 743 148(4)	13 303 549	13 301 049

(1) Gross voting rights number (or « theoretical » voting rights) is used as a calculus base for 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 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.