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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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26-50 of 93 items listed First Previous Next Last
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Purchaser Seller     
Status
Date
Complete
Value
($M)
Undisclosed Buyer Northwestern Energy Corporation Failed 30
UIL Holdings Corporation Philadelphia Gas Works Failed 12/04/2014 1,860
UGI Development Company Allegheny Energy Supply Company, LLC Completed 51
Undisclosed Buyer El Paso Corporation Completed 11/01/2007 752
UGI Energy Services, Inc. PG Energy Services Inc Completed 08/24/2006 580
United States Power Fund LP Black River Energy LP Completed 06/30/2004 n/a
UIL Holdings Corporation Iberdrola SA Completed 11/16/2010 1,296
Undisclosed Buyer Clayton Williams Energy, Inc. Completed 08/24/2005 21
Undisclosed Buyer Clayton Williams Energy, Inc. Completed 11/07/2007 21
Undisclosed Buyer TECO Energy, Inc. Completed 68
United States Power Fund LP TECO Energy, Inc. Completed 07/19/2004 12
Union Electric Company CIPSCO Inc. Completed 12/31/1997 1,400
Undisclosed Buyer Dynegy Inc. Completed 04/26/2004 48
Undisclosed Buyer Calpine Corporation Completed 07/01/2004 223
US Power Generating Company RRI Energy, Inc. Completed 975
UtiliCorp Networks Canada (Alberta) Ltd. TransAlta Energy Marketing, Inc. Completed 09/01/2000 450
Undisclosed Buyer Energy Transfer Partners, LP Completed 07/26/2005 106
UNS Energy Corporation (formerly UniSource Energy) Citizens Communications Completed 230,000
UBS AG Chesapeake Energy Corporation Completed 1,100
Undisclosed Buyer Chesapeake Energy Corporation Completed 1,500
Union Fenosa Ingenieria Mobilinver Completed 04/18/2002 n/a
Undisclosed Buyer Aurado Energy Inc. Completed 10/13/2005 4
US Infrastructure LP Gastar Exploration Limited Completed 11/17/2009 22
Undisclosed Buyer CONSOL Energy Inc. Completed 08/11/2005 n/a
Undisclosed Buyer FirstEnergy Corporation Completed 200
26-50 of 93 items listed First Previous Next Last
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