| Date | Acquired | Amount |
|---|---|---|
| Apr 25, 2017 |
|
$ 4,200,000,000 |
| Jul 02, 2014 |
|
$ 7,750,000,000 |
| Jan 20, 2014 |
|
Undisclosed amount |
| Feb 01, 2013 |
|
Undisclosed amount |
| Jan 01, 2001 |
|
$ 3,200,000,000 |
| Sep 05, 1997 |
|
$ 642,000,000 |
