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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) |
WPPI Energy |
Wisconsin Energy Corporation |
Unknown |
 |
|
239 |
Westar Energy Inc |
ONEOK, Inc. |
Unknown |
 |
|
53 |
Westport Resources Corp. |
Belco Oil & Gas Corp. |
Unknown |
 |
|
992 |
WPS Power Development, Inc. |
CH Energy Group, Inc. |
Unknown |
 |
|
61 |
Winter Park, City of |
Progress Energy, Inc. |
Unknown |
 |
|
n/a |
Welton Energy Corporation |
Infiniti Resources International Ltd. |
Unknown |
 |
|
n/a |
Welwyn Resources Limited |
Pan Orient Energy Limited |
Unknown |
 |
|
n/a |
Wartsila Corporation |
Gerhardt Holding Co Inc. |
Unknown |
 |
|
n/a |
Wisconsin Public Service Corporation |
Fox Energy Company LLC |
Unknown |
 |
|
440 |
WorleyParsons |
UniField Engineering, Inc. |
Unknown |
 |
|
17 |
Wind Energy America, Inc. |
Boreal Energy Inc. |
Unknown |
 |
|
n/a |
Western Lakota Energy Services Inc. |
Undisclosed Seller |
Unknown |
 |
|
13 |
Western Wind Energy |
Undisclosed Seller |
Unknown |
 |
|
n/a |
Williams Companies, Inc |
Aspect Abundant Shale LP |
Unknown |
 |
|
166 |
WEC Energy Group |
Apex Clean Energy |
Pending |
 |
|
302 |
WEC Energy Group |
Bishop Hill Energy II, LLC |
Pending |
 |
|
148 |
WEC Energy Group |
Avangrid Renewables |
Pending |
 |
|
235 |
WEC Energy Group |
Thunderhead Wind Energy Center |
Pending |
 |
|
338 |
Westar Energy |
Great Plains Electric Coop Inc |
Pending |
 |
|
14,000 |
Woodside Petroleum Limited |
Energy Partners |
Failed |
 |
|
880 |
Washington Water Power Company |
NV Energy (formerly Sierra Pacific Power Company) |
Failed |
 |
|
n/a |
Westar Energy Inc |
Kansas City Power & Light Company |
Failed |
 |
|
2,000 |
Wisconsin Public Service Corporation |
MGE Energy |
Completed |
 |
09/24/2001 |
n/a |
Wisconsin Energy Corporation |
Integrys Energy Group, Inc. |
Completed |
 |
04/08/2015 |
5,700 |
Wentworth Energy |
Undisclosed Seller |
Completed |
 |
01/24/2006 |
n/a |
|