The Benchmark Franchise (WIBOR → WIRON)Narrow moat

Through GPW Benchmark, the group holds a quietly significant franchise: it administers Poland's key financial benchmarks, most importantly the WIBOR interbank reference rate. WIBOR is the number to which a vast stock of Polish loans, mortgages, and financial contracts is tied — the reference rate embedded throughout the financial system — and administering it is an institutionally central, regulated role that few entities could hold. Alongside WIBOR sits the family of WIG stock-market indices, which GPW licenses for funds, derivatives, and structured products.

Benchmark administration is a subtle but real franchise. The whole system references these numbers, which gives their administrator a central, sticky position and a stream of licensing and administration revenue. But this sub-aspect carries a live and specific risk that earns it its own prominence: Poland is in the middle of a reform to replace WIBOR with a new risk-free rate, WIRON (and the transition has been fraught and repeatedly delayed). A benchmark reform of that magnitude directly affects the most important index GPW Benchmark administers — potentially a threat to a valuable franchise, potentially an opportunity to administer its successor. Either way, it makes the benchmark business both more important to watch and more uncertain than a quiet licensing line would appear — reform, like much else here, runs through the state that holds 51,80% of the votes¹. The first Treasury bonds referencing the new POLSTR rate were listed on 26 November 2025².