Citigroup is rumoured in negotiations to acquire a second final-salary pension scheme.
According to an unnamed source cited in a report in British daily the Times, the bank is believed to be mulling buying a European scheme with a value of around $400 million.
The bank has also identified a number of other targets, and has a fund of around $1 billion to make these acquisitions, the source added.
News of the prospective deal comes just two weeks after Citigroup purchased a shell company containing the Thomson Regional Newspapers fund for around $400 million.
That deal represented the first time that a bank in Britain had bought a company retirement fund.