Warsaw, May 5, 2026

Communiqué

GPW Benchmark announces that after the trading session on 5 May 2026, the shares of company COLUMBUS (ISIN PLSTIGR00012) will be removed from the lists of constituents of the sWIG80, sWIG80TR and WIG140 indices.

The removal of COLUMBUS company from the portfolios of the above mentioned indices results from the methodology, pursuant to which stock exchange indices may not include companies whose shares have been subject to a suspension of stock exchange trading at the request of the Polish Financial Supervision Authority (KNF).

If trading is not resumed before the lapse of 10 trading days from the suspension day, company ATREM (ISIN PLATREM00017) will be included in the sWIG80, sWIG80TR and WIG140 indices in place of COLUMBUS, with a share package of 2,611,000 shares.