First Reserve and Fortress Acquire Majority Stake in Island Energy Services

June 2, 2025

First Reserve and funds managed by affiliates of Fortress Investment Group (Fortress) agreed to acquire a majority stake in Island Energy Services (IES) from an affiliate of One Rock Capital Partners. One Rock will remain an investor in IES following the transaction, which was expected to close in the third quarter of 2025 and has since been completed.

Buyers
First Reserve, Fortress Investment Group
Targets
Island Energy Services, LLC
Sellers
An affiliate of One Rock Capital Partners, LLC
Industry
Infrastructure
Location
Hawaii, United States
Transaction Type
Buyout

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