Blackstone GP Stakes and RidgeLake Partners Take Minority Stake in Sentinel Capital Partners

Blackstone GP Stakes Acquires Minority Stake in Great Hill Partners

November 12, 2021

Financial Services

Funds managed by Blackstone GP Stakes have acquired a minority ownership interest in Boston-based private equity firm Great Hill Partners. The minority investment is intended to support Great Hill’s continued growth and investment strategy; Evercore served as financial advisor to Great Hill while Kirkland & Ellis and Fried Frank served as legal counsel to Great Hill and Blackstone, respectively.

Tenex Capital Management Invests in Sentinel Technologies

November 3, 2025

IT Services

Tenex Capital Management has made a growth investment in Sentinel Technologies, a Chicago-based provider of IT solutions, managed services, and managed security services. The investment closed on November 3, 2025; Sentinel, which employs nearly 700 people, will use the capital to accelerate growth and expand its service capabilities across education, healthcare, government, financial services, and other end markets.

RidgeLake Partners Makes Strategic Minority Investment in Gauge Capital

October 6, 2021

Financial Services

RidgeLake Partners has made a strategic minority investment in Gauge Capital, a Southlake, Texas-based middle-market private equity firm. Terms were not disclosed; RidgeLake (a partnership between PA Capital and Ottawa Avenue Private Capital) said the investment will support Gauge's future growth and investment activities with no changes planned to the firm's day-to-day management.

Blackstone GP Stakes Takes Minority Stake in Nautic Partners

December 14, 2021

Financial Services

Funds managed by Blackstone GP Stakes have acquired a minority ownership interest in Nautic Partners LLC, a Providence-based middle-market private equity firm. The investment creates a strategic partnership intended to provide Nautic with access to Blackstone’s resources as Nautic continues to deploy capital from its newly-closed $3.0 billion fund.

Sentinel Capital Partners Invests in Midwest Eye Consultants

September 13, 2021

Healthcare Services

Sentinel Capital Partners made a strategic growth investment in Midwest Eye Consultants, a Wabash, Indiana-based management services organization supporting optometry and ophthalmology practices in Indiana and northwest Ohio. Midwest Eye operates a network of affiliated practices across 54 locations with more than 74 healthcare specialists; terms were not disclosed and Physician Growth Partners advised Midwest Eye.

Morgan Stanley Capital Partners Acquires Apex Companies from Sentinel Capital Partners

February 1, 2023

Environmental Services

Investment funds managed by Morgan Stanley Capital Partners (MSCP) have acquired Apex Companies, a Rockville, Maryland–based environmental consulting and engineering firm, from Sentinel Capital Partners. Sentinel will retain a minority stake post-closing; financial terms were not disclosed. Apex operates over 1,100 professionals across ~50 offices and provides services in stormwater compliance, water resources, ESG, health & safety, transportation, and civil engineering.