Warsaw, October 23, 2023

Communiqué

GPW Benchmark announces that following the trading session on October 25, 2023 there will be an extraordinary adjustment of WIG20, WIG20TR, WIG30, WIG30TR, WIG140, WIG, WIG-Poland and WIG-ESG.

As a result of this extraordinary adjustment the number of shares of ALLEGRO company (ISIN LU2237380790) will amount to:

• 565,820,000  in WIG20, WIG20TR, WIG30, WIG30TR, WIG140, WIG and WIG-Poland indices;
• 408,326,000 in WIG-ESG index.

The extraordinary adjustment results from the increase in the number of free float shares of ALLEGRO company over EUR 250 million.