Cryptocurrency exchange Kraken secured participation from Apollo Global Management, Oppenheimer, Jane Street, and HSG (formerly Sequoia Capital China) in its recent funding round that valued the company at approximately $15 billion, two sources familiar with the matter told Reuters. The $500 million raise, completed in September, also included Qube Research & Technologies, Kraken co-CEO Arjun Sethi, and his venture firm Tribe Capital. One source said the financing paves the way for a potential IPO in the coming months.