| Date | Acquired | Amount |
|---|---|---|
| Aug 14, 2017 |
|
$ 240,000,000 |
| May 23, 2017 |
|
Undisclosed amount |
| May 12, 2016 |
|
Undisclosed amount |
| Jul 29, 2015 |
|
£ 140,000,000 |
| Jul 21, 2014 |
|
$ 45,000,000 |
| Apr 06, 2012 |
|
Undisclosed amount |
