Innate Pharma

Declaration of Voting Results & Voting Rights Announcements • May 29, 2013

NUMBER OF SHARES AND VOTING RIGHTS OF INNATE PHARMA AS AT MAY 17, 2013

Marseille, May 29, 2013

Pursuant to the article L. 233-8 II of the French « Code de Commerce » and the article 223-16 of the French stock-market authorities (Autorité des Marchés Financiers, or "AMF") charter, Innate Pharma SA (the "Company" - Euronext Paris: FR0010331421 – IPH) releases its total number of shares outstanding as well as its voting rights as at May 17, 2013:

Total number of shares outstanding:	38,135,892
Total number of theoretical voting rights (1):	38,135,892
Total number of exercisable voting rights (2):	38,045,328

(1) The total number of theoretical voting rights (or "gross" voting rights) is used as the basis for calculating the crossing of shareholding thresholds. In accordance with Article 223-11 of the AMF General Regulation, this number is calculated on the basis of all shares to which voting rights are attached, including shares whose voting rights have been suspended.

(2) The total number of exercisable voting rights (or "net" voting rights) is calculated without taking into account the shares with suspended voting rights, in this case, shares held by the Company in the context of a liquidity agreement. It is released so as to ensure that the market is adequately informed, in accordance with the recommendation made by the AMF on July 17, 2007.

About Innate Pharma:

Innate Pharma S.A. is a biopharmaceutical company developing first-in-class immunotherapy drugs for cancer and inflammatory diseases.

The Company specializes in the development of new monoclonal antibodies targeting receptors and pathways controlling the activation of innate immunity cells. Its innovative approaches have led to licensing agreements with Novo Nordisk A/S and Bristol-Myers Squibb.

Incorporated in 1999 and listed on NYSE-Euronext in Paris in 2006, Innate Pharma is based in Marseilles, France, and had 83 employees as at March 31, 2013.

Learn more about Innate Pharma at www.innate-pharma.com.

Practical Information about Innate Pharma shares:

ISIN code	FR0010331421
Ticker code	IPH

Disclaimer:

This press release contains certain forward-looking statements. Although the company believes its expectations are based on reasonable assumptions, these forward-looking statements are subject to numerous risks and uncertainties, which could cause actual results to differ materially from those anticipated. For a discussion of risks and uncertainties which could cause the company's actual results, financial condition, performance or achievements to differ from those contained in the forward-looking statements, please refer to the Risk Factors ("Facteurs de Risque") section of the Document de Reference prospectus filed with the AMF, which is available on the AMF website (http://www.amf-france.org) or on Innate Pharma's website.

This press release and the information contained herein do not constitute an offer to sell or a solicitation of an offer to buy or subscribe to shares in Innate Pharma in any country.

For additional information, please contact:

Innate Pharma ATCG Press

Laure-Hélène Mercier Director, Investor Relations Phone: +33 (0)4 30 30 30 87 Mob.: +33 (0)6 26 94 18 53 investors@innate-pharma.com mb@atcg-partners.com

Marielle Bricman