Probes into share price spikes in the run up to fundraising efforts by the two firms as well as trades surrounding stock from property business Segro are currently under way, the UKâs Daily Telegraph reported.
Meanwhile, unnamed sources told the Financial Times that investors may have used insider information to make Â£4.1 million from trades on Scottish & Newcastleâs shares during its acquisition by Heineken.
The FSA, working in collaboration with the Serious Organised Crime Agency, has arrested seven traders alleging that they operated as part of the UKâs largest ever insider trading network.
In a statement, released at the time of the arrests, the regulator said: âIt is believed that the city professionals passed inside information to traders (either directly or via middlemen) who traded based on this information and have made significant profits as a result.â
Julian Rifat, a trader at Moore Capital, Martyn Dodgson, a corporate adviser at Deutsche Bank and stockbroker Ben Anderson are thought to be among the arrested traders.
By Jim Ottewill