Four individuals have been arrested as part of a Financial Conduct Authority insider dealing investigation.
The FCA and the Metropolitan Police executed search warrants in West London this morning.
Three men aged 29, 51 and 56 and one woman aged 25 have been arrested and are currently being held in custody to be questioned in connection with an investigation into insider dealing and market abuse.
No individuals have been charged at this stage. The arrests are not linked to any other ongoing insider dealing investigation.
Insider dealing is a criminal offence punishable by a fine or up to seven years in prison.
The FCA, and previously the FSA, has secured 23 insider dealing convictions since March 2009. It is currently prosecuting seven other individuals for insider dealing.