Citadel Securities, a market-making firm with offices globally, completed the acquisition of Designated Market Making Unit from IMC Trading, a provider of proprietary trading services. Financial terms were not disclosed. "The DMM business provided IMC with many benefits since we acquired it six years ago. The decision to sell our DMM business at this time is in line with IMC's growth strategy, which focuses on our core strengths –market making, advanced technology and deep liquidity. After an extensive process, we are excited to be able to execute this business transfer with Citadel Securities, as we know our issuers will continue to be well-served by their DMM expertise," Sunny Khiani, IMC US operations managing director.