At least three bidders are expected to be shortlisted for the second round of an auction for Unilever’s (ULVR.L) (UNc.AS) margarine and spreads business while two other private equity groups are no longer in the fray, sources told Reuters. Buyout funds Blackstone (BX.N) and CVC Capital Partners [CVC.UL], who were teaming up on a joint offer, are no longer in the running for the business which could be worth more than $7 billion, the sources said on Tuesday.