The story
Mitsubishi UFJ Securities International was wholly owned by Mitsubishi UFJ Securities Holdings Co., Ltd. (MUSHD), which is itself wholly owned by MUFG. MUSHD's other subsidiaries include Mitsubishi UFJ Morgan Stanley Securities and Mitsubishi UFJ Merrill Lynch PB.
MUSI was established on 1 October 2005, when Mitsubishi UFJ Financial Group, was formed by the merger of Mitsubishi Tokyo Financial Group (MTFG) and UFJ Holdings. On the same day, the respective investment banking subsidiaries of MTFG and UFJ, Mitsubishi Securities International plc (established in England and Wales on February 11, 1983) and UFJ International plc (with the merger of Sanwa International plc and Tokai Bank Europe plc in April 2002), were merged to form Mitsubishi UFJ Securities International plc.
On 1 July 2016, the name was changed to MUFG Securities EMEA plc.
From Wikipedia’s article on Mitsubishi UFJ Securities International, shared under CC BY-SA 4.0.5