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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) |
Wisconsin Public Service Corporation |
Wisconsin Fuel and Light |
Completed |
 |
04/02/2001 |
55 |
WPPI Energy |
Wisconsin Energy Corporation |
Unknown |
 |
|
239 |
Wisconsin Power & Light Company |
Wisconsin Electric Power Company |
Completed |
 |
03/01/2011 |
n/a |
Wisconsin Power & Light Company |
Wind Capital Group, LLC |
Completed |
 |
|
n/a |
Williams Partners L.P. |
Williams Pipe Line |
Completed |
 |
|
n/a |
Williams Energy Partners L.P. |
Williams Pipe Line |
Completed |
 |
04/11/2002 |
1,000 |
Williams Partners L.P. |
Williams Companies, Inc |
Completed |
 |
11/23/2010 |
782 |
Williams Partners L.P. |
Williams Companies, Inc |
Completed |
 |
12/13/2006 |
1,200 |
Williams Partners L.P. |
Williams Companies, Inc |
Completed |
 |
|
750 |
Wisconsin Energy Corporation |
WICOR, Inc. |
Completed |
 |
04/26/2000 |
1,275 |
WorleyParsons |
UniField Engineering, Inc. |
Unknown |
 |
|
17 |
Williams Companies, Inc |
Undisclosed Seller |
Completed |
 |
|
258 |
Whittier Energy Corporation |
Undisclosed Seller |
Completed |
 |
|
8 |
Whiting Petroleum Corporation |
Undisclosed Seller |
Completed |
 |
03/31/2005 |
65 |
Whiting Petroleum Corporation |
Undisclosed Seller |
Completed |
 |
01/18/2005 |
19 |
Wentworth Energy |
Undisclosed Seller |
Completed |
 |
01/31/2006 |
n/a |
Wentworth Energy |
Undisclosed Seller |
Completed |
 |
01/24/2006 |
n/a |
W&T Offshore, Inc. |
Undisclosed Seller |
Completed |
 |
07/08/2005 |
n/a |
Western Lakota Energy Services Inc. |
Undisclosed Seller |
Unknown |
 |
|
13 |
Wysak Inc. |
Undisclosed Seller |
Completed |
 |
07/28/2005 |
n/a |
Wysak Inc. |
Undisclosed Seller |
Completed |
 |
06/21/2005 |
n/a |
Western Wind Energy |
Undisclosed Seller |
Unknown |
 |
|
n/a |
Western Gas Resources Inc |
Undisclosed Seller |
Completed |
 |
10/01/2004 |
82 |
WaveForm Energy Limited |
Undisclosed Seller |
Completed |
 |
10/13/2005 |
n/a |
Williams Companies, Inc |
TransCanada Pipelines Ltd. |
Completed |
 |
03/19/2001 |
n/a |
|