Implementation of a liquidity contract

Stallergenes has entrusted SG Securities Paris with the implementation of a liquidity contract

Stallergenes has entrusted SG Securities Paris with the implementation of a liquidity contract complying with the AFEI Ethics Charter of 14 March 2005, approved by the AMF’s decision of 22 March 2005, in relation to shares in Stallergenes, through a contract effective from today’s date for a period of one year, renewable by tacit agreement.

The following resources were allocated to the liquidity account for the implementation of the contract:

• € 1,500,000 (one million five hundred thousand euro),

• 30,000 (thirty thousand) treasury shares.

The objective of the implementation of this contract is to improve share liquidity and reduce share price volatility.