Correction of the Quarterly report for the first quarter of 2011

Current report 13/2011 dated 03.06.2011

Legal basis: Article 56 (1) item 2 of the Public Offering Act — current and periodical information

The Management Board of ATM S.A. informs that in the quarterly report No. 1/2011 of ATM S.A. capital group for the first quarter of 2011 published on May 13, 2011 on pages 5 and 6 mistaken data were announced concerning two positions of the balance sheet as of March 31, 2011: trading and other receivables and short term liabilities. Consequently mistaken are also the derived total values in the balance sheet as well as in “Selected Financial Data” on page 15.

The attachment to this report includes all the positions of the financial report for the first quarter of 2011 requiring correction.

The above mention corrections do not affect the remaining financial data, particularly the revenues and profits of the Issuer for the reporting period.

The corrected Quarterly report for the first quarter of 2011 including the above mentioned information will be published today i.e. June 3, 2011.

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