| Date | Acquired | Amount |
|---|---|---|
| Jun 10, 2017 |
|
Undisclosed amount |
| May 11, 2017 |
|
$ 7,600,000,000 |
| Oct 08, 2015 |
|
$ 5,900,000,000 |
| Oct 20, 2014 |
|
Undisclosed amount |
| Sep 02, 2009 |
|
Undisclosed amount |
