[Former Marshall Wace Trader Claims Share of Circle Investment Profits] Former Marshall Wace trader Scott Arnold has filed a claim against the London-based hedge fund Marshall Wace, seeking a share of the profits generated from its investment in stablecoin issuer Circle Internet Group Inc. Arnold asserts that he was a key figure in facilitating the deal. According to documents, Marshall Wace has invested approximately $200 million in Circle since 2021 and held over 8.5 million shares, representing about 4%, prior to Circle's listing on the New York Stock Exchange on June 5 this year. This investment could become one of the most profitable projects in the fund's history.