| Date | Acquired | Amount |
|---|---|---|
| Jan 25, 2017 | Undisclosed amount | |
| Dec 14, 2016 | Undisclosed amount | |
| Oct 03, 2016 | $ 800,000,000 | |
| Sep 30, 2016 | Undisclosed amount | |
| Sep 07, 2016 | Undisclosed amount | |
| Aug 15, 2016 | $ 110,000,000 | |
| Aug 01, 2016 | $ 750,000,000 | |
| Jul 21, 2016 | Undisclosed amount | |
| Jun 01, 2016 | $ 2,800,000,000 | |
| May 09, 2016 | Undisclosed amount | |
| Apr 04, 2016 | $ 32,799,999 | |
| Feb 19, 2016 | Undisclosed amount | |
| Jan 22, 2016 | Undisclosed amount | |
| Dec 23, 2015 | $ 360,000,000 | |
| Dec 14, 2015 | Undisclosed amount | |
| Sep 02, 2015 | Undisclosed amount | |
| Jul 31, 2015 | $ 24,200,000 | |
| May 29, 2015 | Undisclosed amount | |
| Apr 01, 2015 | Undisclosed amount | |
| Jul 11, 2014 | $ 390,000,000 | |
| Jun 07, 2013 | Undisclosed amount | |
| Jun 04, 2013 | $ 2,500,000,000 | |
| May 09, 2013 | Undisclosed amount | |
| Feb 06, 2013 | Undisclosed amount | |
| Nov 23, 2012 | Undisclosed amount | |
| Jul 09, 2012 | Undisclosed amount | |
| Jun 25, 2012 | Undisclosed amount | |
| Jun 18, 2012 | Undisclosed amount | |
| Jun 04, 2012 | $ 649,000,000 | |
| May 01, 2012 | Undisclosed amount | |
| Dec 15, 2011 | Undisclosed amount | |
| Nov 14, 2011 | Undisclosed amount | |
| Sep 21, 2011 | Undisclosed amount | |
| Aug 26, 2011 | Undisclosed amount | |
| Mar 30, 2011 | Undisclosed amount | |
| Feb 01, 2011 | Undisclosed amount | |
| Jan 06, 2011 | Undisclosed amount | |
| Dec 21, 2010 | Undisclosed amount | |
| Dec 08, 2010 | Undisclosed amount | |
| Sep 24, 2010 | Undisclosed amount | |
| May 28, 2010 | Undisclosed amount | |
| Apr 21, 2010 | Undisclosed amount | |
| Dec 31, 2009 | Undisclosed amount | |
| Dec 11, 2009 | Undisclosed amount | |
| Aug 19, 2008 | $ 31,500,000 | |
| Apr 10, 2007 | Undisclosed amount | |
| Apr 11, 2006 | Undisclosed amount |