Sberbank and Mail.Ru are on the brink of a multi-billion dollar corporate divorce, the Financial Times has reported. The two companies have asked the Kremlin for permission to break up the partnership, which covers joint ventures in ride hailing, fast food delivery and express groceries, the newspaper reported, citing anonymous company sources. Rumors of a breakup have been circling for months, with the sides reported to be unhappy with how their O2O joint venture is squaring up against heavy competition from Russia's largest technology company Yandex, disagreements over integration with VKontakte — Russia's largest social network, owned by Mail.Ru — and how the initiative fits into Sberbank's own sprawling financial system and ambitions in the e-commerce space. The FT reports communication has almost completely broken down between the two sides, although there are no firm plans on how or when to break up the joint venture.