Blackstone GP Stakes, an investor in private equity firms, agreed to acquire a minority stake in Great Hill Partners, a private equity firm. Financial terms were not disclosed. “We focus on partnering with best-in-class alternative asset managers with differentiated investment playbooks and track records of generating strong returns for their investors. Great Hill excels in those areas. We are excited to join Great Hill for the next chapter of their growth," Ward Young, Blackstone GP Stakes Managing Director.