Innogy SE was an energy company based in Essen, Germany. The company was established on April 1, 2016, by dividing rwe's renewable and retail networkbusiness into a separate entity. The new entity brought together the subsidiaries of RWE Innogy, RWE Deutschland, RWE Effizienz, RWE Vertrieb and RWE Energiedienstleistungen.On 7 October 2016, listed on the Frankfurt Stock Exchange. They served 23 million customers in Europe. In November 2017, it was announced that Innogy is looking to merge the uk energy retailer npower, with the equivalent division of rival SSE. Innogy's shareholders were to own 34% of the merged entity, however, the deal failed, and in November 2019, it was announced that Npower would eventually be acquired after the acquisition of Innogy by E.ON. In March 2018, it was announced that E.ON would acquire Innogy, in a complex deal of asset swapwith RWE. The stock transfer was completed in September 2019.