News of the discussions come as Providence and Carlyle have lined up a syndicate of banks, led by JPMorgan Chase, to provide most of the debt for a deal, according to The Daily Telegraph.
In July, Informa announced that discussions were underway with Providence Equity, the Carlyle Group and Hellman & Friedman.
At the time, Informa said it had received a preliminary approach from "a further third party", believed to be Blackstone.
Blackstone is now working with Providence and Carlyle after Hellman & Friedman dropped out of the consortium.
United Kingdom
Informa bidders discuss joint offer
LONDON - Private equity firm Blackstone is in discussions with rivals Carlyle Group and Providence Equity about making a joint bid for B2B publishing company Informa, according to reports.