| Date | Acquired | Amount |
|---|---|---|
| May 13, 2016 |
|
$ 950,000,000 |
| Feb 10, 2016 |
|
$ 7,200,000,000 |
| Apr 08, 2015 |
|
$ 28,900,000,000 |
| Jul 14, 2014 |
|
$ 5,300,000,000 |
| Dec 06, 2013 |
|
$ 1,750,000,000 |
| Nov 09, 2011 |
|
Undisclosed amount |
| Sep 07, 2010 |
|
Undisclosed amount |
| May 12, 2007 |
|
$ 6,700,000,000 |
| Aug 28, 2006 |
|
Undisclosed amount |
| Jul 26, 2004 |
|
Undisclosed amount |
| Jun 29, 1998 |
|
$ 205,000,000 |
