When I started working in Comminus, I was assigned to the team whose main job was to support and implement new functionalities for clients using IMS (Investment Management System) and PMS (Pension Management System) custom applications. As a rookie in Comminus, but with experience in another fields of IT, I had to learn a lot of new terms in a short period of time just to be able to speak to my colleagues and clients. First major project that was assigned to me was to implement MiFIR Reporting for our clients. I thought: “Sounds great, but what is it?” and 2 seconds later I was googling “MiFIR”. After visiting web pages Google found, I was still confused, nothing made sense and I was asking myself “Now what?”. In this blog, I will present to you the MiFIR Reporting and how it was successfully implemented.