Press release regarding the filing of a simplified tender offer

This offer and this draft offer document remain subject to the review of the Autorité des marchés financiers

PROPOSED SIMPLIFIED TENDER OFFER FOR THE COMPANY’S SHARES AND CONVERTIBLE BONDS

Initiated by

acting in concert with Hoche Partners PEI

Presented by

presenting and guaranteeing institution

INFORMATION MEMORANDUM PREPARED BY INOVALIS

TERMS OF THE TENDER OFFER

Offer price :

EUR 1.80 per Advenis share

3,017.42 per Advenis convertible bond

Duration of the Offer: 15 trading days

The timetable of this tender offer will be determined by the Autorité des marchés financiers (the “AMF”) in accordance with the provisions of its general regulations.

This press release relating to the filing of a draft offer document (the “Draft Offer Document”) has been prepared and disseminated on 24 September by INOVALIS, in accordance with the provisions of Article 231-16 of the AMF General Regulation.

THIS OFFER AND THE DRAFT OFFER DOCUMENT REMAIN SUBJECT TO REVIEW BY THE AMF

This offer and the draft offer document remain subject to review by the Autorité des marchés financiers

IMPORTANT NOTICE

In accordance with the provisions of Article L. 433-4 II of the French Monetary and Financial Code and Articles 237-1 et seq. of the AMF General Regulation, in the event that, at the end of the Offer, the number of Advenis shares not tendered by the non-Concert shareholders does not represent more than 10% of the share capital and voting rights of Advenis, Inovalis intends to request the AMF to implement within three (3) months after the closing of the Offer, of a squeeze-out procedure in order to have the Advenis shares not tendered to the Offer transferred to Inovalis, in consideration for a cash consideration equal to the Offer price per Advenis share, net of all costs.

Inovalis also intends to apply to the AMF, within three (3) months of the closing of the Offer, in accordance with the provisions of Article L. 433-4 III of the French Monetary and Financial Code and the AMF General Regulation applicable at the closing of the Offer, the implementation of a squeeze-out procedure in order to have the bonds convertible into shares not presented to the Offer transferred to it, in return for a unitary compensation equal to the Offer price per bond convertible into Advenis shares, net of all costs, in the event that the sum of (i) the Advenis shares not tendered to the Offer and not held by the Concert and (ii) the Advenis shares likely to be issued as a result of the conversion of the convertible bonds into shares not tendered to the Offer and not held by the Concert, does not represent more than 10% of the sum of the existing and new Advenis shares likely to be created as a result of the conversion of the convertible bonds into shares

Copies of the draft offer document are available on the websites of the AMF (www.amf-france.org) and Inovalis (www.inovalis.com) and may be obtained free of charge on request from Kepler Cheuvreux, 112 avenue Kléber, 75116 Paris and Inovalis, 52 rue de Bassano, 75008 Paris.

In accordance with Article 231-28 of the AMF’s General Regulation, the information relating to the legal, financial and accounting characteristics of the Offeror will be filed with the AMF and made available to the public no later than the day before the opening of the tender offer.

This offer and the draft offer document remain subject to review by the AMF