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News of the private equity interest had emerged on the same day in June that merger talks with United Business Media collapsed.
"We believe the relative ease with which Informa could be dismantled either by business or industry vertical could make the group more digestible," Numis analysts said in a note.
"Should an offer not be forthcoming, the group could still reconsider a merger with UBM," they added.
Analysts have said that Informa, which was built up through mergers and acquisitions, could be dismantled into more manageable pieces and sold off.
(Reporting by Mark Potter and Mike Elliott; Editing by Paul Bolding/Rory Channing)