RBR has recruited Gael de Boissard, a former Credit Suisse investment bank co-head to support its campaign, which follows some investor frustration with the slow progress of Chief Executive Tidjane Thiam's turnaround plan. Thiam, in the job since July 2015, has restructured the bank to focus on wealth management and less on investment banking, while the Swiss lender has been hit by billions in fines and write-downs. Credit Suisse shares traded 1.6 percent higher in early business on Tuesday. Although the shares had gained 9.7 percent this year, the performance reflected only a partial rebound from a feeble 2016 where they fell nearly a third.