ELO released 14 studio albums, with their most successful being *A New World Record* (1976), *Out of the Blue* (1977), and *Discovery* (1979). The band has sold over 50 million records worldwide.
ELO disbanded in 1986 but reunited in 2014 for a series of live concerts. The band has not released any new studio albums since then, but they have continued to tour sporadically.
So, to answer your question, no, ELO has not split up. However, they are not currently active as a recording or touring band.