EIG Global Energy Partners
Corporate brand
UnclaimedEIG Global Energy Partners is a U.S.-based investment firm specializing in energy and infrastructure assets.
Last updated August 27, 2026
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Overview
EIG Global Energy Partners, commonly known as EIG or EIG Partners, is an investment firm headquartered in Washington, D.C., that focuses on energy and energy-infrastructure investments. Its activities have included private equity, mezzanine debt, senior secured lending, project finance and other negotiated investments in energy companies, infrastructure projects and related assets. The firm has historically targeted institutional capital and has operated across developed and emerging energy markets. The business originated in 1982, when the TCW Group established an Energy & Infrastructure Group in Los Angeles. The group was created to invest specifically in energy-related infrastructure, using a combination of mezzanine financing and private equity. Its strategy emphasized privately negotiated transactions involving energy projects and small- to mid-capitalization companies, initially concentrated in developed countries. This orientation gave the business exposure to the financing needs of oil and gas companies, power businesses, pipelines, liquefied natural gas assets and other infrastructure operators. In 2007, the TCW energy team established TCW Energy Partners, a feeder vehicle investing in funds and projects managed by the group. The vehicle was intended for institutional investors and was listed on GSTrUE, a private exchange operated by Goldman Sachs. The creation of the feeder fund represented an expansion of the platform's capital-raising structure, although it remained connected to TCW at the time. In January 2011, TCW's Energy & Infrastructure Group separated from TCW and became EIG Global Energy Partners. The separation enabled the investment team to operate independently and retain more of the economic upside from its business. At the same time, the firm moved its headquarters from Los Angeles to Washington, D.C. The former TCW Energy Partners vehicle was renamed Gateway Energy & Resource later in 2011. EIG subsequently attracted strategic minority investors. China Investment Corporation acquired an undisclosed minority stake in 2012, and Affiliated Managers Group acquired another undisclosed minority interest in 2014. EIG also explored ways to broaden access to its investment portfolio through a public listing of Gateway in Hong Kong. Proposed transactions in 2012 and 2013 did not reach completion, including a proposed backdoor listing involving China Development Bank International Investment. The firm has pursued large infrastructure transactions in addition to fund-based investments. In 2021, a consortium led by EIG agreed to acquire a 49 percent interest in Saudi Aramco's oil-pipelines business for $12.4 billion. In 2023, EIG and Brookfield Corporation agreed to acquire Origin Energy in Australia for $10.2 billion, with EIG expected to take the company's liquefied natural gas business. Although the transaction received approval from the Australian Competition and Consumer Commission, it was terminated in December 2023 after the proposal failed to secure the required shareholder support. EIG has also been involved in notable financing disputes and restructurings. Its litigation concerning Intervention Energy Holdings followed the company's default on senior secured notes issued by EIG and a subsequent Chapter 11 filing. In a separate matter, EIG challenged the proposed acquisition of TCW by The Carlyle Group, citing contractual rights and concerns about the transfer of proprietary information to a competitor. That lawsuit was resolved in 2013, allowing the TCW acquisition to proceed. The firm maintains offices in Washington, D.C., Hong Kong, Houston, London, Rio de Janeiro, Seoul and Sydney. In 2023, Infrastructure Investor ranked EIG as the fifth-largest infrastructure debt investment firm by capital raised over the preceding five-year period. Its brand is therefore associated primarily with specialist institutional investment in energy and infrastructure rather than with consumer-facing products.
History
EIG's origins lie in the Energy & Infrastructure Group formed by the TCW Group in Los Angeles in 1982. TCW created the group as a dedicated investment platform for energy-related infrastructure, differentiating it from broader investment operations through its exclusive sector focus. The group supplied mezzanine debt and private equity to energy projects and companies, concentrating primarily on privately negotiated transactions involving small and mid-sized businesses as well as individual infrastructure projects. The platform expanded its institutional-capital architecture in 2007 with the formation of TCW Energy Partners. This feeder fund invested in EIG-managed funds and projects and accepted capital only from institutional investors. It was listed on GSTrUE, a private exchange associated with Goldman Sachs. The vehicle was later renamed Gateway Energy & Resource after the energy team separated from TCW. In January 2011, TCW's Energy & Infrastructure Group became an independent firm under the name EIG Global Energy Partners. The separation was driven by the energy team's desire to control more fully the economics and strategic direction of its business and to reduce constraints associated with operating inside a larger regulated financial organization. EIG relocated its headquarters from Los Angeles to Washington, D.C., while the former TCW Energy Partners vehicle was renamed Gateway Energy & Resource in June 2011. EIG developed a shareholder base that included strategic institutional investors. China Investment Corporation acquired an undisclosed minority stake in February 2012. Affiliated Managers Group acquired another undisclosed minority stake in March 2014. During 2012 and 2013, EIG explored a Hong Kong listing for Gateway to create a broader route for investors to obtain exposure to the underlying energy investments. A proposed $200 million offering was withdrawn amid weak market conditions. A later proposal involving China Development Bank International Investment was also terminated in August 2013. The firm's independent status produced a significant legal dispute with its former parent. In 2012, EIG sought to prevent The Carlyle Group from acquiring TCW, arguing that the transaction could violate contractual rights created during the 2011 separation. EIG was particularly concerned that proprietary information could pass to Carlyle, which competed in related investment markets. The matter was settled in January 2013. EIG withdrew its opposition, and Carlyle completed its acquisition of TCW from Société Générale in February 2013. Under the settlement, EIG no longer had to make payments to TCW on new funds introduced in the future. EIG has used both debt and equity strategies in energy markets. In 2012, it provided Intervention Energy Holdings with $200 million in senior secured notes to finance well development. Intervention later defaulted while owing approximately $140 million and filed for Chapter 11 in May 2016. EIG argued that contractual provisions required unanimous shareholder approval for the bankruptcy filing. The court rejected EIG's attempt to halt the case in June 2016. After further proceedings, the bankruptcy case was dismissed in November 2016 and EIG took control of Intervention. The firm was also connected financially to Aubrey McClendon, the former head of Chesapeake Energy. EIG reportedly lent McClendon more than $1.2 billion for personal interests in Chesapeake wells and drilling costs. The disclosure raised questions about possible conflicts involving Chesapeake's management and financing relationships, although EIG was not accused of impropriety in the account described by the reference material. EIG had financed Chesapeake at an early stage, helping support its 1993 initial public offering, and later invested in SandRidge Energy after Chesapeake co-founder Tom L. Ward established that company. EIG also invested in Permian Resources. Before McClendon's death in 2016, EIG had reportedly foreclosed on and taken possession of his interests in oil wells securing the loans. EIG later participated in several high-value infrastructure transactions. In April 2021, a consortium led by EIG agreed to purchase a 49 percent interest in Saudi Aramco's oil-pipelines business for $12.4 billion. In March 2023, EIG and Brookfield Corporation agreed to acquire Origin Energy for $10.2 billion. The proposed structure contemplated EIG taking Origin's liquefied natural gas unit while the broader business was separated. The Australian Competition and Consumer Commission approved the deal in October 2023, but the transaction failed to secure the required shareholder support. After opposition from Origin's largest investor, AustralianSuper, the acquisition was terminated in December 2023. EIG operates internationally, with offices in Washington, D.C., Hong Kong, Houston, London, Rio de Janeiro, Seoul and Sydney. Its investment scope has developed from a focused energy-finance practice into a global platform spanning infrastructure debt, private equity, project finance and direct asset ownership. In 2023, Infrastructure Investor ranked it fifth among infrastructure debt investment firms by fundraising over the preceding five years.
- 2023
Origin Energy acquisition is proposed and later terminated
[1]EIG and Brookfield announce a proposed acquisition of Origin Energy, which is approved by Australia's competition regulator but ends after insufficient shareholder support.
- 2021
Saudi Aramco pipelines investment
[1]An EIG-led consortium agrees to purchase a 49 percent stake in Saudi Aramco's oil-pipelines business.
- 2016
EIG takes control of Intervention Energy
[1]Following Intervention Energy's debt default and unsuccessful Chapter 11 case, EIG takes control of the company.
- 2014
Affiliated Managers Group takes a minority stake
[1]Affiliated Managers Group acquires an undisclosed minority interest in EIG.
- 2013
TCW acquisition dispute is settled
[1]EIG resolves its opposition to Carlyle's acquisition of TCW and ends the lawsuit.
- 2012
China Investment Corporation acquires a minority stake
[1]China Investment Corporation takes an undisclosed minority interest in EIG.
- 2011
EIG becomes independent
[1]TCW's Energy & Infrastructure Group separates from TCW, adopts the EIG Global Energy Partners name and moves its headquarters to Washington, D.C.
- 2007
TCW Energy Partners is established
[1]The energy group creates an institutional-investor feeder fund for EIG-managed funds and projects.
- 1993
Early financing supports Chesapeake Energy's public offering
[1]EIG's predecessor provides early-stage financing associated with Chesapeake Energy before the company's initial public offering.
- 1982
TCW establishes an energy and infrastructure investment group
[1]TCW forms a Los Angeles-based group dedicated to energy infrastructure investments through mezzanine debt and private equity.
Products and positioning
A specialist institutional investment platform focused on private capital, credit and ownership opportunities across the global energy and infrastructure sectors.
Private equity · 1982
Energy and infrastructure private equity
EIG invests equity capital in energy companies, infrastructure operators and individual projects. Its direct-investment approach has included negotiated transactions involving oil and gas, pipelines, liquefied natural gas and other energy assets, often alongside institutional and strategic partners.
Infrastructure debt · 1982
Energy infrastructure debt
Debt investing is a core part of EIG's historical model. The platform has supplied mezzanine debt, senior secured notes and other forms of private financing to energy companies and infrastructure projects, including capital for development, construction and operational needs.
Energy finance · 1982
Project finance
EIG provides structured capital for energy-related projects and assets. Project-finance activity can involve negotiated credit and equity positions designed around the cash flows, collateral and operating characteristics of individual infrastructure investments.
Brand decisions
2023
Proposed acquisition of Origin EnergyM&ABackground
EIG and Brookfield sought to acquire the Australian integrated energy company Origin Energy and separate its businesses.
Action taken
The parties announced a $10.2 billion acquisition plan under which EIG would take Origin's liquefied natural gas unit.
Aftermath
The transaction received competition approval but was terminated in December 2023 after the required shareholder approval was not obtained.
Transaction value. $10.2 billion (March-December 2023)
2021
Saudi Aramco oil-pipelines investmentM&ABackground
EIG pursued a large-scale infrastructure investment in Saudi Arabia's oil transportation network.
Action taken
An EIG-led consortium agreed to acquire a 49 percent equity stake in Saudi Aramco's oil-pipelines business.
Aftermath
The announced transaction expanded EIG's profile as a participant in major international energy-infrastructure acquisitions.
Transaction value. $12.4 billion (April 2021)
2012
EIG explores a Hong Kong listing for GatewayStrategyBackground
EIG sought to provide a wider group of investors with exposure to its energy investments through a proposed listing of Gateway Energy & Resource.
Action taken
The firm planned a Hong Kong offering intended to raise approximately $200 million, but withdrew the proposal amid unfavorable market conditions. A subsequent listing route was also explored.
Aftermath
A proposed transaction involving China Development Bank International Investment was terminated in August 2013, and Gateway did not complete the planned listing.
Proposed fundraising. $200 million proposed (2012)
Recent events
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