Divestiture • Utilities

Williams Acquires MountainWest Pipelines

On December 15, 2022, Williams acquired utilities company MountainWest Pipelines from Southwest Gas for 1.5B USD

Acquisition Context
  • This is Williams’ 1st transaction in the Utilities sector.
  • This is Williams’ largest (disclosed) transaction.
  • This is Williams’ 10th transaction in the United States.
  • This is Williams’ 1st transaction in Nevada.

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M&A Deal Summary

Date December 15, 2022
Target MountainWest Pipelines
Sector Utilities
Buyer(s) Williams
Sellers(s) Southwest Gas
Deal Type Divestiture
Deal Value 1.5B USD

Target Company

MountainWest Pipelines

Las Vegas, Nevada, United States
MountainWest Pipelines comprises roughly 2,000-miles of interstate natural gas pipeline systems. MountainWest Pipelines is based in Las Vegas, Nevada.
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Buyer Overview 1

Buyer

Williams

Tulsa, Oklahoma, United States

Category Company
Founded 1908
Sector Energy Services and Equipment
Employees5,829
Revenue 10.5B USD (2024)
DESCRIPTION
Williams' headquarters in downtown Tulsa, Oklahoma.
Williams' headquarters in downtown Tulsa, Oklahoma.

Williams is a North American energy infrastructure company. It owns interests in or operates 15,000 miles of interstate gas pipelines, 1,000 miles of NGL transportation pipelines, and more than 10,000 miles of oil and gas gathering pipelines. Williams was formed in 1908 and is based in Tulsa, Oklahoma.


Deal Context for Buyer #
Overall 10 of 11
Sector: Utilities 1 of 1
Type: Divestiture 3 of 3
State: Nevada 1 of 1
Country: United States 10 of 11
Year: 2022 2 of 2
Size (of disclosed) 1 of 4
PREVIOUS DEAL
DATE TARGET DEAL TYPE VALUE
2022-09-08 NorTex Midstream Partners

Houston, Texas, United States

NorTex Midstream Partners is an independently owned developers and operators of high-deliverability, multi-cycle natural gas storage capacity. NorTex was founded in 2007 and is based in Houston, Texas.

Buy $423M
FOLLOWING DEAL
DATE TARGET DEAL TYPE VALUE
2025-02-19 Rimrock Energy Partners

Oklahoma City, Oklahoma, United States

Rimrock Energy Partners focused on the acquisition, development, and management of midstream energy assets across multiple commodities (crude oil, natural gas, natural gas liquids). Rimrock Energy Partners was founded in 2015 and is based in Oklahoma City, Oklahoma.

Buy $325M

Seller Profile 1

SELLER

Southwest Gas

Las Vegas, Nevada, United States

Category Company
Founded 1931
Sector Utilities
Employees11,122
Revenue 5.1B USD (2024)
DESCRIPTION
Southwest Gas Corporation's headquarters in Las Vegas, Nevada.
Southwest Gas Corporation's headquarters in Las Vegas, Nevada.

Southwest Gas is a provider of natural gas service to customers in Arizona, California, and Nevada. Southwest Gas was founded in 1931 and is based in Las Vegas, Nevada.


Deal Context for Seller #
Overall 1 of 1
Sector: Utilities 1 of 1
Type: Divestiture 1 of 1
State: Nevada 1 of 1
Country: United States 1 of 1
Year: 2022 1 of 1
Size (of disclosed) 1 of 1
PREVIOUS DEAL
DATE TARGET DEAL TYPE VALUE
2003-10-20 Black Mountain Gas Co.

Cave Creek, Arizona, United States

Black Mountain Gas Co. a natural gas distribution company.

Buy $25M