Warsaw, September 28, 2026

Communiqué

GPW Benchmark announces that following the trading session on September 30, 2026, there will be a periodic change of bond indices portfolio. In the indices there will be following changes:

TBSP.Index

• new bond: PS1031,
• change in the number of bonds: OK0129, PS0527, DS0436, DS0727, OK0128, PS0131, DS1034, DS1035, DS1033.

GPWB-B1Y3Y

• change in the number of bonds: OK0128, OK0129.

GPWB-B1Y4Y

• change in the number of bonds: OK0128, OK0129.

GPWB-B1Y5Y

• change in the number of bonds: PS0131, PS0731, OK0128, OK0129.

GPWB-B3Y5Y

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

GPWB-B3Y

• change in the number of bonds: DS1033, DS1035, DS1034, PS0131, PS0731, DS0436.

GPWB-B5Y

• new bond: PS1031,

• change in the number of bonds: DS1033, DS1035, DS1034, DS0436.

GPWB-BWZ

• change in the number of bonds: NZ0331, NZ0928.

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