Castlelake has confirmed it is in the early stages of considering an offer for the carrier, but stressed no approach has been made.
EasyJet, meanwhile, said Castlelake's interest comes while its share price is "temporarily depressed" owing to the effects of the war in Iran.
"The board of easyJet has not had any discussions with, nor received any approach or proposal from Castlelake," it said in a statement issued on Monday morning (1 June).
For its part, Castlelake added: "There can be no certainty that any offer will be made, nor as to the terms of any offer."
