ANNUAL REPORTS Filing date View Mar 16, 2015 View HTML 0001047469-15-002278.pdf 0001047469-15-002278.xls Mar 15, 2016 View HTML 0001558370-16-004151.pdf 0001558370-16-004151.xls Mar 13, 2017 View HTML 0001564590-17-004044.pdf 0001564590-17-004044.xls Feb 27, 2018 View HTML 0001564590-18-003554.pdf 0001564590-18-003554.xls Mar 1, 2019 View HTML 0001564590-19-005640.pdf 0001564590-19-005640.xls Proxy Statements Group 3,4,5Annual FilingsCurrent ReportsMergers & AcquisitionsOtherProxy FilingsQuarterly FilingsRegistration Statements Filing date View Apr 30, 2015 View HTML 0001047469-15-004197.pdf 0001047469-15-004197.xls Apr 29, 2016 View HTML 0001047469-16-012765.pdf 0001047469-16-012765.xls May 1, 2017 View HTML 0001564590-17-007952.pdf 0001564590-17-007952.xls Apr 10, 2018 View HTML 0001564590-18-007892.pdf 0001564590-18-007892.xls Apr 25, 2018 View HTML 0001564590-18-009093.pdf 0001564590-18-009093.xls