Description Atom Trefl Sopot was a Polish women's volleyball club based in Sopot and playing in the Orlen Liga.
The club was founded in 2008 as Trefl Gdynia and since its creation is a project designed to focus on professional sport at the highest league. The club reached the top Polish league after two seasons, in 2010 and achieved league success shortly after, winning the Championship in 2011–12 and 2012–13. The club proved to be very competitive at the highest national level as on its first six seasons (from 2010 until 2016), apart from the two titles mentioned earlier, it finished the league no lower than third placed. In the same period, it has also reached the Polish Cup finals on four occasions (winning in 2014–15) and was involved in three Polish Super Cups. In international competitions the club has yet to win a title, it has been often featuring in European competitions with a second place at the 2014–15 CEV Cup as its best result. In 2017 club replaced by Proxima Kraków and changed name on Trefl Proxima Kraków. This new club had promoted from I liga.