SIOEN : Update share buyback program - 28/01/2013

Regulated Information Update regarding the share buyback program (28/01/2013)

Ardooie - 28/01/2013
In accordance with the regulations with respect to the acquisition of own shares, Sioen Industries nv informs that within the framework of the share buyback program, as announced per 29th October 2012, the following transactions took place in the period from 21/01/2013 till 25/01/2013 included, on the stock exchange market NYSE Euronext Brussels and this in accordance with the mandate given by the Extraordinary General Meeting of 24/04/2009 :

After the transactions mentioned above, the total number of own shares amounts to 1 004 649 on the date of 25/01/2013 or 4.70 % of the total number of outstanding shares.
As the participation of Sioen Industries NV, Sihold NV, Sicorp NV, Stichting Administratiekantoor MIDAPA and Mrs. Jacqueline Sioen-Zoete amounts to 65.03 % (13 910 861 voting securities), a transparency declaration will be made.
This information is also available on the website : www.sioen.com.

Sioen Industries group

Sioen Industries nv is a diversified, publicly traded group with an extensive portfolio of products and activities :

spinning, weaving and coating, manufacturing of technical clothing, production of fine chemicals and processing of technical textiles. Sioen Industries is the world leader in coated technical textiles, a strong global player in high-tech protective clothing and a niche specialist in fine chemicals. Full information can be found on www.sioen.com.

1

Press release Sioen Industries

28/01/13 - after stock market closing

5101N:

INDUSTI II:S

For ali further information and Investor Relations :

Geert Asselman, CFO

Sioenindustries nv, Fabriekstraat 23, B-8850 Ardooie, Tel. [phone]- Fax[phone]

E-mail : [e-mail] Website : www.sioen.com

Financial servicing is provided by KBC Bank, BNP Paribas Fortis Bank, ING Bank, Belfius Bank and Bank

Degroof.

2

Press release Sioen Industries

28/01113- after stock market closing