| Date | Acquired | Amount |
|---|---|---|
| Oct 24, 2017 |
|
$ 400,000,000 |
| Jul 05, 2017 |
|
Undisclosed amount |
| Jun 01, 2017 |
|
Undisclosed amount |
| Feb 15, 2017 |
|
Undisclosed amount |
| Jun 17, 2016 |
|
Undisclosed amount |
| Mar 01, 2016 |
|
Undisclosed amount |
| Nov 16, 2015 |
|
$ 650,000,000 |
| Oct 27, 2015 |
|
$ 5,200,000,000 |
| Sep 05, 2014 |
|
$ 350,000,000 |
| Nov 19, 2013 |
|
Undisclosed amount |
| Dec 21, 2012 |
|
$ 8,199,999,997 |
| Dec 31, 2011 |
|
Undisclosed amount |
| Feb 25, 2011 |
|
Undisclosed amount |
| Jun 04, 2008 |
|
$ 625,000,000 |
| Jun 05, 2007 |
|
Undisclosed amount |
