Release no. 2 - 2011 To NASDAQ OMX Nordic Exchange Copenhagen A/S This is a translation of the Danish version. Only the Danish version is legally binding. ROCKWOOL INTERNATIONAL A/S Hovedgaden 584, Entrance C DK2640 Hedehusene Phone: +45 4656 0300 www.rockwool.com Danish CVR no: 54879415 Page 1/1 17 January 2011 Major shareholder announcement Rockwool International A/S Pursuant to section 29 of the Danish Act on Securities Trading we hereby announce that the company has received the following major shareholder announcements regarding alterations in the possession of voting rights and share capital after the partial merger of the company's class A share capital with the class B share capital by re-registration of a total of 1,841,173 class A shares to class B shares, as further described in release no. 1 dated 14 January 2011: 15. Juni Fonden has informed Rockwool International A/S that it holds 1,318,496 class A shares of a nominal value of DKK 10, which after the re-registration is equivalent to a total of 6 % of the share capital and a total of 10.71 % of the voting rights. -------------------------------------------------------------------------------- ---0---------------------------------------------------------------------------- ------- Jan Kähler has informed Rockwool International A/S that he holds 672,251 class A shares of a nominal value of DKK 10 and 153,723 class B shares of a nominal value of DKK 10, which after the re-registration is equivalent to a total of 3.76 % of the share capital and a total of 5.59 % of the voting rights. -------------------------------------------------------------------------------- ---0---------------------------------------------------------------------------- ------- Tom Kähler has informed Rockwool International A/S that he holds 621,304 class A shares of a nominal value of DKK 10 and 145,109 class B shares of a nominal value of DKK 10, which after the re-registration is equivalent to a total of 3.49 % of the share capital and a total of 5.17 % of the voting rights. -------------------------------------------------------------------------------- ---0---------------------------------------------------------------------------- ------- Rockwool Foundation has informed Rockwool International A/S that it now holds 2,864,367 class A shares of a nominal value of DKK 10 and 2,157,685 class B shares of a nominal value of DKK 10, which after the re-registration is equivalent to a total of 22.85 % of the share capital and a total of 25.03 % of the voting rights. Further information: Group Legal Affairs Rockwool International A/S +45 46 56 03 00