The French firm expects earnings before interests, taxes, depreciation and amortisation (EBITDA) to come in between 610 and 640 million euros ($590.5-619.6 million) this year, up from the "above 550 million euros" initially forecast.

It also announced that it entered into exclusive negotiations with Valesco Group to sell its Paris headquarters building, the Sequana Tower, for 465 million euros.

($1 = 1.0330 euros)

(Reporting by Elena Vardon, editing by Tassilo Hummel)