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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 |
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