Blackstone and RidgeLake Partners agreed to invest in Sentinel Capital Partners, an investment firm focusing on leveraged buyouts, mezzanine capital, management buyouts and corporate divestitures. Financial terms were not disclosed. Sentinel’s portfolio companies will have access to Blackstone’s group purchasing programs, which leverage the buying power of the $150bn revenue base across Blackstone’s entire investment platform. Sentinel will also be able to draw from a wide range of other services Blackstone provides internally and to its portfolio companies, including sustainability, ESG and cybersecurity. The investment from RidgeLake will give Sentinel access to additional sources of potential deal flow and industry know-how. RidgeLake brings more than 40 years of experience as an active private markets investor and industry thought leader in the middle market.