| Date | Acquired | Amount |
|---|---|---|
| Apr 18, 2017 |
|
$ 3,350,000,000 |
| Oct 19, 2016 |
|
Undisclosed amount |
| Sep 17, 2014 |
|
$ 130,000,000 |
| Dec 02, 1999 |
|
Undisclosed amount |
