Greensill's demise has caused red faces for investors, banks, and sparked a political crisis in Britain The Co-op Bank announced on Wednesday that two US private equity companies have agreed to buy a minority stake in the company from an existing investor. JC Flowers and Bain Capital Credit collectively bought a 10.01% stake of class A shares from BlueMountain Capital — a hedge fund where current Barclays (BARC.L) chief Jes Staley was once a managing director. The transaction, which also gives the pair access to 12.05% of B shares, remains subject to regulatory clearance.