Solvac S.A. — Major Shareholding Notification 2011

May 11, 2011

SOCIETE ANONYME

Rue Keyenveld 58 - B-1050 Brussels - Belgium Tel. + 32 2 509 61 11 External Communications and Investor Relations Tel. + 32 2 509 60 16 P R ress elease

REGULATED INFORMATION

Embargo, May 11, 2011 at 8.30 a.m. (Brussels time)

SOLVAC

Intermediate Statement

In accordance with the Royal Decree of November 14, 2007, art. 14

At this moment, Solvac holds 25,512,757 Solvay shares, i.e. 30.12% of Solvay unchanged compared to the end of 2010.

In the period from January 1, 2011 until today and in accordance with an earlier announcement:

• Solvac has received a gross dividend of EUR 30.6 million (Solvay interim dividend of EUR 1.20 gross per share, recognised in 2010 and paid on January 13, 2011). It will receive the Solvay dividend balance (EUR 1.8667 gross per share, increased compared to 2009) on May 17, 2011, i.e. a gross dividend of EUR 47.6 million;
• On February 17, 2011, SOLVAC has paid out the second interim dividend, this being the balance (EUR 1.47 net per share) after the approval by the General Assembly on May 10, 2011. This represents a cash lay out of EUR 26.5 million (withholding tax included).

We draw the reader's attention to the publication by Solvay of its 1st quarter 2011 results on May 9, 2011. The press release can be downloaded from www.solvay.com.

This intermediate statement has been approved by the Managing Director of Solvac.

For additional information, please contact

SOLVAC S.A.

Investor Relations Rue Keyenveld, 58 1050 Brussels Phone: + 32 2 509 61 11 Fax: + 32 2 509 72 40

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