The winning top scorer in Champions League, Europe during the season 2018/2019 was Lionel Messi with 12 goals scored.
The season start for Champions League 2018/2019 was 18 September 2018, the finishing round was being played 1 June 2019. More information and the winning top scorers in Champions League between the seasons 2000/2001-2019/2020 here.