Supplement to the current report no. 4/2011 of 27.04.11

Current report 05/2011 dated 02.05.2011

Legal basis: Article 56 (1) (1) of the Offer Act — confidential information

With reference to the periodic report featuring the annual financial data of the Company and of ATM SA Group, the Management Board of ATM S.A. hereby submits enclosed the draft versions of resolutions of the Ordinary General Meeting published in the current report no. 4/2011 of April 27, 2011, supplemented with financial data.

Roman Szwed — President of the Management Board,
Tadeusz Czichon — Vice-President of the Management Board