| Date | Acquired | Amount |
|---|---|---|
| May 02, 2017 |
|
Undisclosed amount |
| May 17, 2016 |
|
Undisclosed amount |
| Mar 12, 2015 |
|
$ 530,000,000 |
| May 04, 2014 |
|
$ 360,000,000 |
| Jun 19, 2013 |
|
Undisclosed amount |
| Apr 22, 2013 |
|
£ 18,000,000 |
| Sep 03, 2012 |
|
Undisclosed amount |
| Dec 01, 2005 |
|
Undisclosed amount |
