In February 2010, hedge fund JRJ Group took a 74% stake and executive control appointing a number of former Lehman Brothers bankers to its board to help expand business.

[8] In July 2011, Marex Spectron acquired the Global Markets Division of Eden Financial, adding non-derivative products as well as European cash equities and fixed income to its range of services.

In May 2012, Marex Spectron acquired the Pro-Trader division of Schneider Trading Associates (STA), a provider of professional trader services.

[12] In December 2018, Marex Spectron announced its acquisition of the customer business of Rosenthal Collins Group LLC, an independent futures commission merchant (FCM) based at Chicago.

[13] In January 2019, Marex Spectron announced that it had acquired London-based trading firm CSC Commodities from BGC European Holdings.

[17] In November 2020, Marex Spectron acquired XFA, an exchange traded derivatives (ETD) execution broker, which is headquartered in Chicago and offices in New York and San Francisco.