Warsaw, August 27, 2026

Communiqué

GPW Benchmark announces that following the trading session on August 31, 2026, there will be a periodic change of bond indices portfolio. In the indices there will be following changes:

TBSP.Index

• change in the number of bonds: DS1033, PS0731, DS1034, PS0131, DS0727, DS0436, PS0527, OK0129.

GPWB-B1Y3Y

• change in the number of bonds: OK0129.

GPWB-B1Y4Y

• change in the number of bonds: OK0129.

GPWB-B1Y5Y

• change in the number of bonds: OK0129, PS0131, PS0731.

GPWB-B3Y5Y

• change in the number of bonds: PS0131, PS0731.

GPWB-B3Y

• change in the number of bonds: DS0436, DS1033, DS1034, PS0131, PS0731.

GPWB-B5Y

• change in the number of bonds: DS0436,DS1033, DS1034.

GPWB-BWZ

• change in the number of bonds: NZ0331.

  Attached is the composition of the portfolios of the remaining bond indices after changes.