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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)
Wysak Inc. Undisclosed Seller Completed 06/21/2005 n/a
Wysak Inc. Undisclosed Seller Completed 07/28/2005 n/a
Wyoming Oil & Minerals, Inc. NRG Resources Completed 06/04/2002 n/a
WPS Power Development, Inc. CH Energy Group, Inc. Unknown 61
WPS Energy Services, Inc. Advantage Energy, Inc. Completed 07/01/2004 n/a
WPPI Energy Menasha, City of Completed 04/06/2011 18
WPPI Energy Wisconsin Energy Corporation Unknown 239
WPL Holdings Interstate Energy Corporation Completed 04/20/1998 n/a
WorleyParsons UniField Engineering, Inc. Unknown 17
Woodward Marketing, LLC Innovative Gas Services (IGS) Completed 12/13/2001 n/a
Woodside Petroleum Limited Energy Partners Failed 880
Woodside Petroleum Limited Gryphon Exploration Company Completed 09/01/2005 297
Wolverine Power Supply Cooperative Inc FirstEnergy Generation Corporation Completed 03/31/2010 n/a
Wolverine Power Supply Cooperative Inc FirstEnergy Generation Corporation Completed 12/31/2010 n/a
Wisconsin Public Service Corporation Wisconsin Fuel and Light Completed 04/02/2001 55
Wisconsin Public Service Corporation Calpine Corporation Completed 12/17/2002 120
Wisconsin Public Service Corporation MGE Energy Completed 09/24/2001 n/a
Wisconsin Public Service Corporation Consolidated Papers, Inc. Completed 08/25/2000 n/a
Wisconsin Public Service Corporation Fox Energy Company LLC Unknown 440
Wisconsin Power & Light Company Wind Capital Group, LLC Completed n/a
Wisconsin Power & Light Company Wisconsin Electric Power Company Completed 03/01/2011 n/a
Wisconsin Power & Light Company Riverside Energy Center, LLC Completed 01/02/2013 392
Wisconsin Power & Light Company Alliant Energy Resources, Inc. Completed 06/01/2009 92
Wisconsin Energy Corporation ESELCO Inc Completed 05/29/1998 71
Wisconsin Energy Corporation Integrys Energy Group, Inc. Completed 04/08/2015 5,700
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