Lime Rock Partners Commits Equity to Athena Energy Partners

Lime Rock New Energy Makes Growth Investment in Hawk Line Construction

November 18, 2025

Utilities

Funds managed by Lime Rock New Energy have made a growth investment in Hawk Line Construction to provide capital and strategic resources for expanding the company’s service capabilities and geographic reach. Hawk’s co-owners and leadership will remain in place and retain significant ownership; financial terms were not disclosed.

Lime Rock New Energy Acquires Controlling Stake in Electric Power Engineers (EPE)

January 13, 2022

Energy

Lime Rock New Energy, a growth equity firm focused on the energy transition, has acquired a controlling interest in Electric Power Engineers, LLC (EPE). The investment provides growth capital to accelerate EPE's expansion of engineering, consulting, and software solutions for power systems, while EPE president Hala N. Ballouz will remain CEO and a significant minority owner.

Rockwood Equity Partners Invests in Energy Renewal Partners

June 5, 2024

Environmental Services

Rockwood Equity Partners has completed a growth investment in Austin-based Energy Renewal Partners (ERP), an energy consulting services firm led by CEO Trisha Elizondo. Rockwood will partner with ERP to scale the business through service expansion and geographic growth while Elizondo remains a significant shareholder and continues as CEO.

Berkshire Partners Makes Strategic Growth Investment in Electric Power Engineers

January 7, 2025

Energy

Electric Power Engineers (EPE), an Austin-based power systems engineering and consulting firm, received a strategic growth investment from Boston-based private equity firm Berkshire Partners. Lime Rock New Energy, the prior investor from 2021, has fully realized its investment; EPE management will remain significant investors and continue to lead the company. Advisory firms on the transaction were AEC Advisors for EPE and Houlihan Lokey for Berkshire.

Hale Capital Partners Acquires Majority Stake in Athenium

November 6, 2024

Software

Hale Capital Partners, a New York-based growth private equity firm, led a cooperative recapitalization to acquire a majority stake in Athenium, a Dover, New Hampshire provider of risk and quality management software. The investment brings in Jim Greenwell as CEO and will support product development, AI/analytics capabilities and expansion into new verticals including insurance, financial services and government.

Apollo Funds Agree to Buy Majority Stake in OEG Energy Group

March 28, 2025

Energy

Apollo funds and affiliates have agreed to acquire a majority stake in OEG Energy Group, an offshore energy solutions provider serving oil and gas and offshore wind. The deal values OEG at over $1 billion on a headline basis and is expected to close in Q2 2025, subject to regulatory approvals and other closing conditions.