Kohlberg Kravis Roberts, the private equity firm, will double its money by floating Sealy just two years after buying the US mattress maker from rival Bain Capital, which took seven years to exit from its investment.

Bain bought a majority stake in Sealy in 1997 in a deal that valued the company at roughly $800m after originally putting in $400m of equity. Private equity companies typically try to sell companies they invest in within three to five years.