Warsaw, September 18, 2026

Communiqué

GPW Benchmark announces that following the trading session on September 30, 2026, there will be a periodic change of corporate bond index (POLCBF) portfolio. The index will undergo the following changes:

• removed instruments*: EBP0927, EFLSA015.

  Attached is the composition of the POLCBF index portfolio after changes.

* - Short name used by the WSE (Warsaw Stock Exchange); for securities not listed on the exchange, the short name used by the KDPW.