GPW Benchmark

GPW Benchmark S.A. is a Polish company that administers financial benchmarks. Its website identifies the company as an administrator of benchmarks under the EU Benchmark Regulation (BMR) and says it is entered in the ESMA register. Its activities include administering the WIBID and WIBOR reference rates and publishing market indices. The company’s published index families include broad and sectoral Polish equity indices, total-return variants, indices for smaller-company markets, and government-bond indices. The website also presents benchmark rates and historical data. It makes historical WIBID and WIBOR fixing values available free of charge on its website; the company directs professional market participants seeking historical fixing data to contact the Warsaw Stock Exchange. GPW Benchmark’s published materials describe a changing benchmark landscape. They cover WIBID and WIBOR, WIRON and related compounded indices, and POLSTR and its compounded-index family. The company’s pages also explain that certain early POLSTR and compounded POLSTR data are pre-production histories calculated under the rules later set out in the relevant index regulations. The available evidence does not establish the company’s founding date, headquarters, ownership, or executives.

GPW Benchmark S.A. is presented in its official materials as an administrator of financial benchmarks and a publisher of market indices. The supplied evidence does not identify its founding date, founders, or initial corporate structure, so those details cannot be established here. The company’s role in WIBID and WIBOR is described with a specific historical distinction. According to its historical-data page, fixing results published for dates from 30 June 2017 onward are calculations performed by GPW Benchmark S.A., and the company bears administrator responsibility for the data from that date. Earlier fixing results shown on the site were supplied by the previous organizer, ACI Polska, the Polish Financial Markets Association. This documents a transition in responsibility for the published fixing data, without establishing that 30 June 2017 was the company’s incorporation date. GPW Benchmark’s materials also document the development and publication of other benchmark families. Its website provides historical data pages for WIRON and compounded WIRON indices, and for POLSTR and compounded POLSTR indices. For POLSTR, the company describes data before 30 May 2025 as pre-production history calculated before the POLSTR Interest Rate Index Regulations took effect, using the principles specified in those regulations. For the POLSTR compounded-index family, it describes data before 2 June 2025 in similar terms, with calculations made before the family’s regulations entered into force. The company’s historical WIBID and WIBOR page records further methodology changes effective 22 December 2025. From that date, WIBID SW and WIBOR SW are described as indices for the SW fixing tenor, forming part of the reference-rate methodology used to determine WIBID and WIBOR for the 1M, 3M, and 6M tenors. The administrator publishes their values for informational purposes. The same page states that WIBOR for the 1Y fixing tenor is determined using an algorithmic method from that date. The present-day site presents the company’s work through benchmark rates, indices, fixing information, and historical data. It identifies the company as a BMR benchmark administrator entered in the ESMA register. The supplied sources do not establish its headquarters, ownership, listing status, leadership, or any subsequent corporate transactions.

• GPW Benchmark responsibility for WIBID and WIBOR fixing data

• POLSTR historical-data boundary

• POLSTR compounded-index historical-data boundary

• Changes to WIBID SW, WIBOR SW and 1Y WIBOR methodology

A benchmark administrator and index provider serving Poland’s financial markets, with published reference rates, market indices, and historical data.

• WIBID and WIBOR reference rates

  Reference rates for which GPW Benchmark administers the fixing process and publishes historical values.

• WIG-family indices

  Market indices published on the company’s site include WIG20, WIG30, mWIG40, sWIG80, WIG, total-return variants, sector indices and other listed families.

• POLSTR and compounded POLSTR indices

  The company provides data pages for POLSTR and its compounded-index family, including POLSTR 1M, 3M and 6M compounded rates and POLSTR CI.

• WIRON and compounded WIRON indices

  The company’s historical-data page includes WIRON and compounded WIRON data.

1. 1GPW Benchmark - Strona głównagpwbenchmark.pl
2. 2GPW Benchmark - Dane historyczne (WIBID i WIBOR)gpwbenchmark.pl
3. 3GPW Benchmark - Dane historyczne (POLSTR i WIRON)gpwbenchmark.pl
4. 4GPW Benchmark - Dane historyczne (usługi)gpwbenchmark.pl
5. 5GPW Benchmark S.A.wikidata.org