Top Energy Private Equity Firms

The U.S. is a global leader in energy innovation, with private equity firms playing a key role in financing and transforming the sector. From renewables and infrastructure to conventional oil & gas and grid modernization, these firms drive operational improvements and long-term growth in energy companies across the country.

In this article, we profile ten of the top private equity firms in the U.S. energy sector. Each one brings a unique investment approach and industry focus, helping energy businesses grow, scale, and evolve with the market.

1. Allied Industrial Partners

Headquartered in Houston, Texas, Allied Industrial Partners is a lower-middle market private equity firm that focuses on high-growth businesses in industrial sectors, including energy, infrastructure, and environmental services.

Founded in 2019, Allied manages over $1 billion in assets and works closely with family-owned companies and experienced management teams to accelerate growth.

The firm uses a thematic investment approach, backed by deep operational expertise and a strong M&A playbook. Its network of industry leaders and executive partners enhances its sourcing and post-acquisition strategies, helping portfolio companies scale efficiently and sustainably.

2. Brookfield Corporation

Brookfield Corporation is a global energy investment firm with nearly $1 trillion in assets under management and a significant focus on the energy and infrastructure sectors.

Headquartered in New York City, Brookfield deploys capital into renewable power, transition technologies, and decarbonization initiatives, alongside traditional energy investments.

The firm blends operational knowledge with institutional discipline. With its origins in asset ownership, Brookfield aligns closely with its portfolio companies by investing its own capital alongside institutional partners. This long-term, sustainability-driven approach has made Brookfield a major player in the global clean energy transition.

3. Cresta Fund Management

Cresta Fund Management, based in Dallas, Texas, is a growth equity investor focused on both sustainable and conventional energy infrastructure. Since 2016, Cresta has deployed capital into sectors like industrial logistics, agriculture, transportation, and energy.

The firm specializes in helping mid-market companies scale through equity investment and strategic partnerships.

With over $1.6 billion in AUM, Cresta backs businesses that are building or upgrading critical infrastructure aligned with today’s energy transformation and decarbonization goals.

4. Hidden Harbor Capital Partners

Located in Boca Raton, Florida, Hidden Harbor Capital Partners is a private equity firm that invests in industrial and energy-related companies across North America. With $1.9 billion under management, the firm emphasizes operational excellence, talent development, and strategic execution.

Hidden Harbor often partners with founder-led and family-owned businesses, particularly those undergoing transitions or seeking growth capital.

Its energy portfolio spans utility services, transportation, infrastructure, and environmental businesses, helping modernize aging systems with new capital and capabilities.

5. Tower Arch Capital

Tower Arch Capital is a middle-market private equity firm headquartered in Draper, Utah. Though it invests across multiple sectors, energy and infrastructure are key areas of interest.

With $1.6 billion in AUM, Tower Arch partners with companies that demonstrate strong operational potential and need support scaling.

The firm targets control investments in businesses with EBITDA between $5 million and $30 million. It brings consulting, financial, and strategic firepower to help energy-related companies grow, especially those in logistics, services, and industrial supply chains tied to the energy ecosystem.

6. Doomsday Partners

Located in Miami, Doomsday Partners is a mission-driven private equity firm focused on investing in sustainable energy solutions. Its portfolio emphasizes innovation in agrivoltaics (the combination of agriculture and solar power), net-zero buildings, and renewable power infrastructure.

While relatively under-the-radar, Doomsday applies a rigorous due diligence process and seeks projects with both environmental and financial upside.

The firm’s strategy is rooted in measurable climate impact, cutting-edge technology, and long-term value generation across the clean energy space.

7. Energy Capital Partners

Energy Capital Partners (ECP) is one of the most respected investment firms in the energy space, with a core focus on electricity, environmental infrastructure, and sustainability.

Headquartered in Summit, New Jersey, with offices in NYC, Houston, and beyond, ECP has built a portfolio of 70+ companies and a team with over 800 years of cumulative sector experience.

The firm is known for executing complex deals and leveraging proprietary origination channels. ECP takes a long-term approach, investing in both conventional and transitional energy assets while emphasizing downside protection, operational value creation, and environmental responsibility.

8. BP Energy Partners

BP Energy Partners invests in natural gas and lower-carbon energy solutions, supporting the shift toward a more efficient and sustainable energy future. The firm backs companies developing technologies in distributed energy, emissions reduction, and sustainable fuel production.

Prioritizing control investments and scalable platforms, BP Energy Partners brings operational discipline and deep sector expertise to each portfolio company.

Its investment strategy is aligned with long-term environmental and economic trends, meeting the rising demand for cleaner, cost-effective energy solutions across North America.

9. CSL Capital Management

Headquartered in Houston, Texas, CSL Capital Management focuses on investments in energy services and equipment providers supporting oil and gas, renewables, and transitional infrastructure. The firm actively backs companies driving efficiency, safety, and sustainability in energy production and distribution.

CSL takes a hands-on approach, working closely with portfolio management teams to improve operational metrics and expand into new markets. Its experience spans private equity and venture capital, allowing CSL to invest flexibly across the energy lifecycle—from early-stage innovation to mature asset optimization.

10. Kayne Anderson

Founded in 1984, Kayne Anderson is a leading alternative investment management firm with $38 billion in assets under management and a team of over 150 investment professionals across the U.S. and Europe.

The global private equity firm specializes in real estate, credit, infrastructure, and energy, pursuing niche, cash flow-oriented strategies that deliver strong, risk-adjusted returns.

In the energy sector, Kayne Anderson has built a long-standing presence. Since 1998, it has been a prominent investor in energy infrastructure marketable securities, becoming one of the most respected names in the space.

The firm’s private equity division has also achieved notable success in the upstream oil and gas sector since 1992. In 2014, Kayne launched its Private Energy Income Funds strategy, targeting opportunistic acquisitions of long-life, low-risk onshore oil and gas assets.

Let’s Recap

These ten energy-focused private equity firms are shaping the future of American energy. Whether investing in renewables, grid modernization, industrial services, or sustainable infrastructure, these firms bring capital, operational know-how, and long-term vision to the sector.

If you're an energy entrepreneur or a company leader looking for the right investment partner, platforms like Private Equity List can help you identify and connect with relevant firms across the U.S. energy landscape.

Sign up today at Private Equity List to explore targeted investors for your energy business.

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