C-Suite exits and frustrated investors: Citigroup is undergoing its most significant changes in half a decade (C)

Citigroup has undergone a slew of changes over the past five months, including the departures of senior executives and restructurings within their business lines. 
In aggregate, these are some of the most seismic changes to take place at Citi since Michael Corbat took the reins as CEO in 2012. 
The changes come amid investor frustration over the pace of Citi's progress, as well as the arrival of activist ValueAct Capital. 
But the bank has downplayed the significance of the change