ERYTECH Pharma S.A.

Declaration of Voting Results & Voting Rights Announcements • Dec 9, 2015

Information related to total number of voting rights and shares composing the share capital November 2015

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

Listing market : Euronext Paris from Euronext Market segment : segment B 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
31 January 2015	6 882 761	8 090 321	8 085 071
28 February 2015	6 886 441	8 094 001	8 092 501
31 March 2015	6 886 941	8 094 301	8 091 801
30 April 2015	6 888 441	8 043 911	8 041 411
06 May 2015	6 888 441	8 733 677(3)	8 731 177
31 May 2015	6 888 441	8 728 137	8 725 637
30 June 2015	6 889 291	8 675 087	8 672 587
31 July 2015	6 896 791	8 687 487	8 684 987
31 August 2015	6 901 641	8 686 137	8 683 637
30 September 2015	6 902 341	8 683 837	8 681 337
31 October 2015	6 903 041	8 684 412	8 681 912
30 November 2015	6 909 531	8 691 157	8 688 657
7 December 2015	7 849 531(4)	9 631 157	9 628 657

• (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 total number of voting rights raised significantly due to the acquisition of double voting rights related to shares namely owned for more than two years.
• (4) The total of shares composing the share capital has increased following the private placement under AMF Visa n°15-614.