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Home > Industry Data > Industry Mergers & Acquisitions

Industry Mergers & Acquisitions - Updated 07/16/21

Below is a list of major energy (electric power) mergers and acquisitions since 1985 and all others since 1996. Type in a keyword for a specific search of purchasers and sellers. Using the pull-down menu, you may sort by purchaser, seller, status or date complete. The same pull-down allows you to filter by location or merger type to narrow your results. To view purchasers within a specific alpha section, click the desired letter below.

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Purchaser Seller Status  
Date
Complete		 Value
($M)
Westinghouse Electric Company ABB Completed 05/05/2021 n/a
Western Farmers Electric Cooperative, Inc. NextEra Energy Resources, LLC Completed 08/01/2019 n/a
WEC Energy Group Avangrid Renewables Completed 01/08/2019 n/a
Wisconsin Energy Corporation Integrys Energy Group, Inc. Completed 04/08/2015 5,700
Wanxiang America Corp. A123 Systems Completed 01/30/2013 256
Wisconsin Power & Light Company Riverside Energy Center, LLC Completed 01/02/2013 392
Williams Partners L.P. Caiman Eastern Midstream LLC Completed 04/30/2012 2,500
Williams Partners L.P. Delphi Midstream Partners, LLC (DMP) Completed 02/21/2012 750
Western Gas Partners, LP Anadarko Petroleum Corporation Completed 01/01/2012 130
WPPI Energy Menasha, City of Completed 04/06/2011 18
Wisconsin Power & Light Company Wisconsin Electric Power Company Completed 03/01/2011 n/a
Western Gas Partners, LP EnCana Corporation Completed 02/28/2011 303
Wolverine Power Supply Cooperative Inc FirstEnergy Generation Corporation Completed 12/31/2010 n/a
Williams Partners L.P. Cabot Oil & Gas Corporation Completed 12/21/2010 150
Williams Partners L.P. Williams Companies, Inc Completed 11/23/2010 782
Wapiti Oil & Gas, L.L.C. Delta Petroleum Corporation Completed 09/07/2010 130
Walter Natural Gas HighMount Exploration & Production Completed 06/03/2010 210
Wheelabrator Technologies Inc Southeastern Public Serv Auth Completed 04/29/2010 150
WildHorse Resources, LLC Clayton Williams Energy, Inc. Completed 04/01/2010 77
Wolverine Power Supply Cooperative Inc FirstEnergy Generation Corporation Completed 03/31/2010 n/a
Waskom Gas Processing Company Crosstex Energy, L.P. Completed 01/19/2010 40
Wisconsin Power & Light Company Alliant Energy Resources, Inc. Completed 06/01/2009 92
Wayzata Investment Partners NRG Energy, Inc Completed 01/03/2007 n/a
Williams Partners L.P. Williams Companies, Inc Completed 12/13/2006 1,200
W&T Offshore, Inc. Kerr-McGee Corporation Completed 08/24/2006 1,340
1-25 of 83 items listed First Previous Next Last
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