Group 1 - Citigroup Inc. has hired Adam Inzirillo from Cboe Global Markets Inc. to lead its equities and futures execution platform within the trading division [1][2] - Inzirillo will assume the role of global head of execution platform in Citigroup's equities unit starting in October and will report to Sebastien Mailleux, global co-head of prime services [2] - Inzirillo previously served as global head of data and access solutions at Cboe, overseeing market data, indexes, risk, and market analytics [3] Group 2 - In his new position at Citigroup, Inzirillo will focus on enhancing the bank's electronic platform, developing trading algorithms, and improving offerings in equities trading [4] - Citigroup is investing in technology and execution services to compete with high-frequency trading firms like Jane Street and Citadel Securities [4] - The bank's prime services business has seen significant growth, with record balances increasing by 27% in Q2 of this year, while the equities trading business generated $1.6 billion, a 6% increase year-over-year [5]