PRESS RELEASE

GPW Benchmark announces:

• the launch of public consultations regarding changes to the methodology for developing certain GPW Indices.

GPW Benchmark invites capital market participants to review the Consultation Document and participate in public consultations concerning the proposed changes to the methodology for developing benchmark indices that are part of the GPW Indices Family.

The public consultations cover changes to the methodology of the WIG20TRsht, WIG20TRlev, mWIG40TRsh, and mWIG40TRlv indices. These changes involve the introduction of an additional provision to the Rules of the GPW Indices Family in the chapter on detailed principles for the construction, calculation, and publication of strategy indices. The provision concerns the materiality threshold of events affecting the calculation of these indices, which determines the actions of the Administrator.

The consultation document published by GPW Benchmark includes an analysis and a detailed description of the proposed changes, which were defined based on analytical work. The consultation document, along with a questionnaire, is available on the Administrator’s website: www.gpwbenchmark.pl.

The consultations will run until 7 September 2025.