Fabrizio Campelli, who oversees Deutsche's investment bank, said it had been looking to grow its business in Britain.
Deutsche Bank shares rose as much as 2.5% in early trade before erasing gains.
MOVING INAs part of the deal, 35 Deutsche Bank corporate finance employees will move in with more than 300 London-based Numis staff.
As part of its strategy, Deutsche Bank - a leading bank in Germany with strong European roots - said earlier this week that it aims to accelerate "growth initiatives" including potential acquisition of portfolios and assets.
Britain is the largest investment banking market in Europe and Numis is a diversified investment bank with a UK franchise.