Sadler was previously the head of Asian equity trading for HSBC Securities in Hong Kong.

[3] In 2014, after two straight years of underperformance, the firm was hit with the resignation of six employees including its chief operating officer.

[2] In January 2024, Segantii's assets declined to about $4.8 billion resulting from investors withdrawing their capital due to poor performance.

[2][4][11] In December 2023, Korea regulators fined Segantii $1.15 million in connection with “certain hedging trades” after it purchased SK Hynix stock in a block transaction in October 2019.

[12] In May 2024, the Securities and Futures Commission started criminal proceedings against Segantii and Sadler accusing them of possessing insider information about Esprit Holdings shares in June 2017 from a former Merrill Lynch employee.