M&A Deal Summary

ArcLight Capital Partners Acquires Kleen

On August 14, 2023, infrastructure investor ArcLight Capital Partners acquired utilities company Kleen from Sojitz, Osaka Gas, Kyushu Electric Power and EnerGia

Acquisition Highlights
  • This is ArcLight Capital Partners’ 12th transaction in the Utilities sector.
  • This is ArcLight Capital Partners’ 84th transaction in the United States.
  • This is ArcLight Capital Partners’ 2nd transaction in Connecticut.

M&A Deal Summary

Date 2023-08-14
Target Kleen
Sector Utilities
Buyer(s) ArcLight Capital Partners
Sellers(s) Sojitz
Osaka Gas
Kyushu Electric Power
EnerGia
Deal Type Divestiture

Target

Kleen

Middletown, Connecticut, United States
Kleen Energy Systems operates a 620-megawatt natural gas-fired, combined-cycle power plant, using gas and steam turbines to generate electricity. Kleen was founded in 2008 and is based in Middletown, Connecticut.

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Buyer(S) 1

Buyer

ArcLight Capital Partners

Boston, Massachusetts, United States

Investor Investor Investor Investor Investor


Category Infrastructure
Founded 2001
PE ASSETS 20.0B USD
Size Mega
Type Sector Focused
DESCRIPTION

ArcLight Capital Partners is private equity firm that invests in energy assets and businesses. Specific areas of interest include power generation; oil, natural gas, coal extraction and production; midstream gathering, processing, storage and transportation of oil, natural gas, coal; energy transportation; and energy distribution companies. ArcLight's geographic coverage includes opportunities across North America, Western Europe, and Australia/New Zealand. ArcLight was formed in 2001 and has offices in Boston and Luxembourg.


DEAL STATS #
Overall 98 of 102
Sector: Utilities M&A 12 of 12
Type: Divestiture M&A Deals 7 of 8
State: Connecticut M&A 2 of 2
Country: United States M&A 84 of 87
Year: 2023 M&A 2 of 3
PREVIOUS DEAL
DATE TARGET DEAL TYPE VALUE
2023-07-05 Gulf Oil

Wellesley Hills, Massachusetts, United States

Gulf Oil is a diverse and growing refined products terminaling, storage, and logistics business and a leading distributor of motor fuels in the United States. Gulf Oil was established in 1901 and is based in Wellesley Hills, Massachusetts.

Sell -
FOLLOWING DEAL
DATE TARGET DEAL TYPE VALUE
2023-10-05 REC Solar

San Luis Obispo, California, United States

REC Solar is a provider of residential solar electric system design and installation with a local presence in all major solar markets in the U.S. By providing innovative products, efficient processes and integrated services, REC Solar’s residential solar solutions deliver high-quality systems while lowering the cost of solar power for all. REC Solar was founded in 1997 and is based in San Luis Obispo, California.

Buy -

Seller(S) 4

SELLER

Sojitz

Tokyo, Japan

Category Company
Founded 2003
Sector Business Services
Employees25,118
Revenue 2.51T JPY (2025)
DESCRIPTION

Sojitz is a general trading company. Sojitz Group offers businesses globally, including buying, selling, importing, and exporting goods, manufacturing and selling products, providing services, and planning and coordinating projects, in Japan and overseas. Sojitz was established in 2003 and is based in Tokyo, Japan.


DEAL STATS #
Overall 1 of 1
Sector: Utilities M&A 1 of 1
Type: Divestiture M&A Deals 1 of 1
State: Connecticut M&A 1 of 1
Country: United States M&A 1 of 1
Year: 2023 M&A 1 of 1
PREVIOUS DEAL
DATE TARGET DEAL TYPE VALUE
2023-05-02 Dutton Group

Richmond, Australia

Dutton Group is an operator and marketer of prestige used vehicles with a national footprint and direct to consumer offering, while Dutton Garage is a bespoke, classic, and super-luxury vehicle retailer. Dutton Group was founded in 1911 and is based in Richmond, Australia.

Buy -
FOLLOWING DEAL
DATE TARGET DEAL TYPE VALUE
2024-02-21 Silaba

San Francisco, Panama

Silaba is an automotive import wholesaler and dealership operator. Silaba was founded in 1991 and is based in San Francisco, Panama.

Buy -
SELLER

Osaka Gas

Osaka, Japan

Category Company
Founded 1897
Sector Utilities
Employees21,404
Revenue 2.07T JPY (2025)
DESCRIPTION

Osaka Gas is a distribution of gas, generation and distribution of power, etc. Osaka Gas was founded in 1897 and is based in Osaka, Japan.


DEAL STATS #
Overall 1 of 1
Sector: Utilities M&A 1 of 1
Type: Divestiture M&A Deals 1 of 1
State: Connecticut M&A 1 of 1
Country: United States M&A 1 of 1
Year: 2023 M&A 1 of 1
PREVIOUS DEAL
DATE TARGET DEAL TYPE VALUE
2018-05-14 Kleen

Middletown, Connecticut, United States

Kleen Energy Systems operates a 620-megawatt natural gas-fired, combined-cycle power plant, using gas and steam turbines to generate electricity. Kleen was founded in 2008 and is based in Middletown, Connecticut.

Buy -
SELLER

Kyushu Electric Power

Fukuoka, Japan

Category Company
Founded 1951
Sector Utilities
Employees21,173
Revenue 2.36T JPY (2025)
DESCRIPTION

Kyushu Electric Power mainly involved in electric power business. It operates through electric power, energy related business, IT and telecommunications, and other segments. Kyushu Electric Power was founded in 1951 and is based in Fukuoka, Japan.


DEAL STATS #
Overall 1 of 1
Sector: Utilities M&A 1 of 1
Type: Divestiture M&A Deals 1 of 1
State: Connecticut M&A 1 of 1
Country: United States M&A 1 of 1
Year: 2023 M&A 1 of 1
PREVIOUS DEAL
DATE TARGET DEAL TYPE VALUE
2018-05-14 Kleen

Middletown, Connecticut, United States

Kleen Energy Systems operates a 620-megawatt natural gas-fired, combined-cycle power plant, using gas and steam turbines to generate electricity. Kleen was founded in 2008 and is based in Middletown, Connecticut.

Buy -
SELLER

EnerGia

Hiroshima, Japan

Category Company
Founded 1951
Sector Utilities
Employees12,526
Revenue 1.53T JPY (2025)
DESCRIPTION

EnerGia is an electric utility company that generates, transmits, and distributes electricity, providing power to millions of inhabitants. EnerGia was founded in 1951 and is based in Hiroshima, Japan.


DEAL STATS #
Overall 1 of 1
Sector: Utilities M&A 1 of 1
Type: Divestiture M&A Deals 1 of 1
State: Connecticut M&A 1 of 1
Country: United States M&A 1 of 1
Year: 2023 M&A 1 of 1
PREVIOUS DEAL
DATE TARGET DEAL TYPE VALUE
2018-05-14 Kleen

Middletown, Connecticut, United States

Kleen Energy Systems operates a 620-megawatt natural gas-fired, combined-cycle power plant, using gas and steam turbines to generate electricity. Kleen was founded in 2008 and is based in Middletown, Connecticut.

Buy -