The Agency for the Co-operation of Energy Regulators (ACER) has published developments concerning the application of, and transaction reporting under, the Regulation on wholesale energy market integrity and transparency REMIT during the fourth quarter of 2015. Points of interest include: (i) since data reporting under REMIT commenced on 7 October 2015, technical issues that arose in the first few weeks of operations have been resolved and ACER and national regulatory authorities are now preparing for the second phase of data reporting under REMIT, which commences on 7 April 2016; (ii) ACER will launch an open call in January to establish roundtable meetings with stakeholders during 2016; and (iii) ACER has updated its REMIT Q&A on a monthly basis and also updated a number of weblinks.