Julian Rifat, a former execution trader at hedge fund Moore Capital Management, was charged Wednesday with eight counts of insider trading, the latest crackdown by British regulators on alleged market wrongdoing.

Rifat, who was arrested on his 41st birthday at his Oxford home in March 2010, is the ninth person charged by the U.K.'s Financial Conduct Authority in a case, code-named "Operation Tabernula," that it has described as its largest ever against alleged insider trading.