The following media organisations have joined Stichting OPR:
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- BDUmedia
- DPG Media
- Erdee Media Groep
- FD Mediagroep
- De Groene Amsterdammer
- Mediahuis Nederland
- Nedag Uitgevers
- Roularta Media Nederland
- RTL Nederland
- Stichting Nederlandse Publieke Omroep/NPO (including all national public broadcast organisations)
- Stichting Regionale Publieke Omroep/RPO (including all regional public broadcast organisations)