Warsaw, October 16, 2026

Communiqué

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

• new instruments: BPO0830, PHP0930,
• removed instruments*: PEO1027, TLP1027.

  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.