Identification
Listing sponsor / Agent

<p>
Soci&eacute;t&eacute; G&eacute;n&eacute;rale</p>

Symbol
ALEHT
ISIN code
FR0004054427
Exchange / Market
Euronext Growth
Trading location
Paris
ICB
Biotechnology
Website address
Issuer website
http://www.exonhit.com
Operation
IPO date
IPO type

<p>
Global Placement and Open Price Offer</p>

IPO price
2.89 euros
IPO type
Initial Public offering
Catégorie
IPO
Operation procedure

<p>
Conditions applying to both Global Placement and Open Price Offer The first share price will be set at the end of the OPO and will take account of the demand expressed in the global placement. The prices of the global placement and the OPO are the same. The definitive price will be set on November 17th, 2005 after centralisation of the OPO and should be published by Euronext Paris in a notice that same day. The final share price may be set outside the mentioned range. Should the price of admission be under EUR 2.50, the number of shares proposed would be modified and the Autorit&eacute; des March&eacute;s Financiers would have to deliver another visa on a new prospectus giving the new terms and conditions of the Offer (Placement and OPO). The placement Before first listing, a proportion of the shares will be included in a public placement in France and an international private placement in some countries excluding the United States of America. - Underwriter: Soci&eacute;t&eacute; G&eacute;n&eacute;rale.</p>

Operation description
Operation calendar

<p>
- Period of the Placement: from November 8th, 2005 to November 16th, 2005 (17:00) - Period of the OPO: from November 8th, 2005 to November 16th, 2005 inclusive - First quotation: November 17th, 2005 - Beginning of trading: November 18th, 2005</p>

Price range
2.50 euros – 2.89 euros