Jamie Dimon's total compensation as chief executive of JP Morgan stayed flat last year at $23m, but some of his top lieutenants, including head of investment banking Jes Staley, saw their pay packages shrink.

The Wall Street bank revealed in a proxy filing with the US Securities and Exchange Commission yesterday that Dimon's basic salary rose from $1m in 2010 to $1.5m in 2011, but his cash bonus fell by the same amount from $5m to $4.5m. He received the same amount of restricted stock units and stock awards.