Approved Publication Arrangement
An Approved Publication Arrangement (APA) is an entity authorized under the MiFID II directive to publish trade reports on behalf of investment firms, fulfilling requirements outlined in Article (4)(1)(52) in the European Union. These reports contribute to increased transparency in over-the-counter (OTC) markets by disseminating both pre-trade quotes and post-trade transaction data.
Source: Wikipedia — Approved Publication Arrangement (CC BY-SA 4.0)