Several private equity groups are interested in buying Barclays bank’s iShares unit, according to a report.

The groups include Hellman & Friedman, Bain Capital, and TPG, Reuters reported citing three anonymous sources.

Hellman is assembling a group of private-equity groups in a transaction which could be valued as much as $5 billion, Bloomberg reported.

Barclays could finance up to 80 percent of the sale price of the unit, the Wall Street Journal reported.