| Date | Acquired | Amount |
|---|---|---|
| May 20, 2014 |
|
$ 1,460,000,000 |
| Jul 15, 2013 |
|
£ 74,000,000 |
| Sep 15, 2011 |
|
$ 120,000,000 |
| May 13, 2008 |
|
$ 425,000,000 |
