Originally founded in 1989 as Numis Securities, the company established itself as a leading independent investment bank and corporate stockbroker in the United Kingdom. It built a strong reputation for its equity research and for advising a large portfolio of UK-listed companies on financial strategy, mergers and acquisitions (M&A), and raising capital. In October 2023, Numis was acquired by Deutsche Bank and was subsequently rebranded to Deutsche Numis, combining Numis's UK market expertise with Deutsche Bank's international reach to create a prominent force in UK investment banking.