PE Firm · Capital Allocator

Energy Capital Partners

Medium
Summit, USA · Founded 2005 · AUM US$18.5 billion (March 2023) · Website
Private equityPrivate creditInfrastructure fundMezzanine capitalLeveraged buyoutPower generationRenewable energyEnergy storageMidstream infrastructureWaste managementData centersDecarbonizationNorth AmericaEuropeAsia-PacificUnited States
Last verified
10/8/2026

Firm Overview

103
Portfolio tracked
7
Sectors
4
Regions
10/8/2026
Last verified

Energy Capital Partners (ECP) is an American investment firm that focuses on investments in the energy sector, including power generation, renewables, and infrastructure.

Founded in 2005 by former Goldman Sachs executives, Energy Capital Partners (ECP) specializes in the energy transition and infrastructure sectors. The firm initially made a significant impact by raising one of the largest debut funds ever at the time. Headquartered in Summit, New Jersey, it has expanded its footprint globally, including a major merger with Bridgepoint Group in 2024 to form a combined private assets investment platform.

The firm's investment focus covers a wide range of energy-related assets, including power generation, renewable energy, and energy storage. Notable for large-scale deal-making, ECP has led major transactions such as the acquisition and subsequent record-breaking sale of Calpine. Recently, the firm has pivoted toward massive infrastructure partnerships to support artificial intelligence and data center power needs, including a $50 billion collaboration with KKR and a $25 billion venture with ADQ.

Beyond private equity, ECP has expanded its strategies to include private credit through initiatives like ECP ForeStar, which targets climate change and sustainability. The firm also maintains a presence in international markets, establishing decarbonization funds in Japan and operating waste management platforms like Biffa in the United Kingdom.

Founded2005
HeadquartersSummit, USA
AUMUS$18.5 billion (March 2023)
Target investment$1 billion - $50 billion (consortium deal sizes)
Employees81 (2023)
StrategiesPrivate equity, Private credit, Infrastructure fund, Mezzanine capital, Leveraged buyout
Sector focusPower generation, Renewable energy, Energy storage, Midstream infrastructure, Waste management, Data centers, Decarbonization
Geographic focusNorth America, Europe, Asia-Pacific, United States

Leadership

Doug Kimmelman
Founder
A founder of ECP and a former senior executive at Goldman Sachs in its investment banking division.
Thomas Lane
Founder
A founder of ECP and former Goldman Sachs executive whose ownership equity was later bought out by the firm.
Scott Helm
Founder
A founder of ECP and a former senior executive at Goldman Sachs in its investment banking division.

Notable Investments

Summit Midstream PartnersEnergy Future HoldingsSunnova Energy CorpCalpineBiffaAtlantica Sustainable InfrastructureLiberty Tire RecyclingSymmetry Energy Solutions

Historical and current deals referenced in public sources.

Portfolio Companies

CompanySectorStatusWebsite
ADA Carbon Solutions—CurrentVisit ↗
AEP Resources Holdings (Pivotal Power)Power GenerationExited—
Algonquin Power & Utilities Corp.Renewables / UtilitiesCurrent—
American Gas & Electric (AGE)Retail Power DistributionCurrentVisit ↗
Anza Renewables—CurrentVisit ↗
Atlantic City Electric (BPNP)Power GenerationExited—
Atlantica—CurrentVisit ↗
Avolta Renewable Holdings—CurrentVisit ↗
Biffa—CurrentVisit ↗
BPL (Broadband over Power Lines) GlobalEnergy Efficiency / Data AnalysticsCurrentVisit ↗
Braya Renewable Fuels—CurrentVisit ↗
Brayton Point & KincaidPower GenerationExited—
Brayton Point Power—CurrentVisit ↗
Bridgeport EnergyPower GenerationExited—
BridgeTex Pipeline CompanyEnergy InfrastructureCurrentVisit ↗
Broad River / EmpirePower GenerationExited—
Broad River Power—CurrentVisit ↗
Bunker HillEnvironmental InfrastructureExited—
Calpine—CurrentVisit ↗
Calpine CorporationNatural Gas and Geothermal GenerationCurrentVisit ↗
Capital Dynamics (Desktop)RenewablesExited—
Cardinal Gas StorageMidstreamExited—
CE2 Carbon Capital—CurrentVisit ↗
Convergent—CurrentVisit ↗
Convergent Energy + PowerEnergy Storage and Grid SupportCurrentVisit ↗
Cormetech—CurrentVisit ↗
Cornerstone Chemical CompanyIntermediate Chemicals and ServicesCurrentVisit ↗
Cornerstone Generation—CurrentVisit ↗
Cornwall InsightEnergy ServicesCurrent—
Custom Truck One Source—CurrentVisit ↗
Delek/Lion OilMidstream / RefiningExited—
Direct EnergyEnergy Services / RetailExited—
Dynegy—CurrentVisit ↗
Empire—CurrentVisit ↗
Empire GenPower GenerationExited—
Empire Gen HoldingsNatural Gas GenerationCurrentVisit ↗
Energy Capital Partners—CurrentVisit ↗
EnergySolutions—CurrentVisit ↗
EquiPower Resources—CurrentVisit ↗
Equitrans MidstreamMidstreamExited—
FirstLight Power Enterprises—CurrentVisit ↗
FirstLight Power ResourcesRenewables / Power GenerationExited—
Frontier RenewablesRenewablesExited—
Gopher ResourceLead / Battery RecyclingCurrentVisit ↗
Grain LNG—CurrentVisit ↗
Green Infrastructure Partners—CurrentVisit ↗
Harvest Midstream (Arrow) / South Texas MidstreamMidstreamExited—
Harvest Midstream CompanyEnergy InfrastructureCurrentVisit ↗
Harvestone Low Carbon Partners—CurrentVisit ↗
Heartland Generation—CurrentVisit ↗
Heritage Power (PowerTeam)Power Generation / ServicesExited—
Interests in Elwood & EquiPowerPower GenerationExited—
Liberty Tire—CurrentVisit ↗
Liberty Tire RecyclingSustainable Recycling ServicesCurrentVisit ↗
Metals-at-Large / New Wood ResourcesEnvironmental InfrastructureExited—
MetrogasUtilities / MidstreamExited—
Metrus EnergyEnergy Efficiency and Efficiency-as-a-ServiceCurrentVisit ↗
New Leaf Energy—CurrentVisit ↗
Next Wave Energy—CurrentVisit ↗
NextEra Energy PartnersRenewablesExited—
Nextlight Renewable Power—CurrentVisit ↗
Northeast Gas GenerationPower GenerationExited—
Novera EnergyRenewablesExited—
Nox-Crete Products GroupConcrete Construction ChemicalsCurrentVisit ↗
Oberon FuelsRenewable DME ProducerCurrentVisit ↗
Odessa Power—CurrentVisit ↗
Operational Energy GroupEnergy ServicesExited—
Ozark Gas TransmissionMidstreamExited—
Pivot Energy—CurrentVisit ↗
PLH Group—CurrentVisit ↗
PPL Generation PortfolioPower Generation lodgesExited—
Pro-Service/T&D PowerEnergy ServicesExited—
PROENERGYPower Generation Services and SolutionsCurrentVisit ↗
Ramaco ResourcesMetallurgical Coal Exploration and DevelopmentCurrentVisit ↗
Red Oak Power—CurrentVisit ↗
Red-White Valve Corp.Industrial Valve Manufacturing and DistributionCurrentVisit ↗
Redlands/SaddlebackRenewables / MidstreamExited—
Restaurant TechnologiesEnvironmental InfrastructureCurrent—
Restaurant Technologies, Inc—CurrentVisit ↗
Rialto BioenergyRenewables / EnvironmentalExited—
Sendero MidstreamMidstreamExited—
Sendero Midstream PartnersEnergy InfrastructureCurrentVisit ↗
Solaris MidstreamMidstream / EnvironmentalCurrent—
Solaris Water MidstreamFull-Cycle Water Management SolutionsCurrentVisit ↗
Southwest GenerationPower GenerationExited—
Summit MidstreamMidstreamExited—
Summit Midstream PartnersEnergy InfrastructureCurrentVisit ↗
Sunnova—CurrentVisit ↗
SunZia Southwest Transmission Project—CurrentVisit ↗
Symmetry Energy Solutions—CurrentVisit ↗
TC EnergyEnergy InfrastructureCurrentVisit ↗
Terra-Gen—CurrentVisit ↗
Terra-Gen PowerRenewable Energy GenerationCurrentVisit ↗
Trilliant HoldingsEnergy Services / TechnologyCurrent—
Triple Oak Power—CurrentVisit ↗
Triton PowerNatural Gas GenerationCurrentVisit ↗
Triton Power Partners—CurrentVisit ↗
USD GroupMidstreamExited—
Ventyx (New Energy Associates)Energy Services / SoftwareExited—
Wheelabrator Technologies—CurrentVisit ↗
Wheelabrator Technologies (WIN Waste Innovations)Waste-to-Energy and Environmental ServicesCurrentVisit ↗
Xpress Natural Gas (XNG)Natural Gas Infrastructure and LogisticsCurrentVisit ↗
Zilkha Biomass EnergyRenewables / EnvironmentalExited—

Source: ecpgp.com/portfolio

Portfolio Web Readiness

Not yet assessed

The assessment covers whether AI crawlers and search engines can reach and parse the public site, page performance, transport and security hygiene, and discoverability. 64 portfolio companies have a website on record.

Observational measurements of these companies' public websites only. Not a rating of the companies, their performance, their management, or their investment merit. Not investment advice. Request a correction or removal via Submit Update.

Sources

This profile is based on publicly available information and may be incomplete or outdated. PE Firm Index is not affiliated with Energy Capital Partners and does not provide investment advice.

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