SEC Filings

Form	Description	Filing date	View
DEF 14A	Official notification to shareholders of matters to be brought to a vote ("Proxy")	Apr 18, 2013	View HTML 0001097149-13-000012.pdf 0001097149-13-000012.xls
DEF 14A	Official notification to shareholders of matters to be brought to a vote ("Proxy")	Apr 04, 2014	View HTML 0001445305-14-001277.pdf 0001445305-14-001277.xls
DEF 14A	Official notification to shareholders of matters to be brought to a vote ("Proxy")	Apr 01, 2015	View HTML 0001097149-15-000007.pdf 0001097149-15-000007.xls
DEF 14A	Official notification to shareholders of matters to be brought to a vote ("Proxy")	Mar 17, 2016	View HTML 0001097149-16-000035.pdf 0001097149-16-000035.xls
DEF 14A	Official notification to shareholders of matters to be brought to a vote ("Proxy")	Apr 07, 2016	View HTML 0001097149-16-000042.pdf 0001097149-16-000042.xls
DEF 14A	Official notification to shareholders of matters to be brought to a vote ("Proxy")	Apr 06, 2017	View HTML 0001097149-17-000013.pdf 0001097149-17-000013.xls
DEF 14A	Official notification to shareholders of matters to be brought to a vote ("Proxy")	Apr 05, 2018	View HTML 0001097149-18-000015.pdf 0001097149-18-000015.xls
DEF 14A	Official notification to shareholders of matters to be brought to a vote ("Proxy")	Apr 04, 2019	View HTML 0001097149-19-000012.pdf 0001097149-19-000012.xls
DEF 14A	Official notification to shareholders of matters to be brought to a vote ("Proxy")	Apr 06, 2020	View HTML 0001097149-20-000016.pdf 0001097149-20-000016.xls
DEF 14A	Official notification to shareholders of matters to be brought to a vote ("Proxy")	Apr 07, 2021	View HTML 0001097149-21-000018.pdf 0001097149-21-000018.xls
DEF 14A	Official notification to shareholders of matters to be brought to a vote ("Proxy")	Apr 05, 2022	View HTML 0001097149-22-000015.pdf 0001097149-22-000015.xls
DEF 14A	Official notification to shareholders of matters to be brought to a vote ("Proxy")	Apr 05, 2023	View HTML 0001097149-23-000029.pdf 0001097149-23-000029.xls EX-101.SCH - XBRL TAXONOMY EXTENSION SCHEMA
DEF 14A	Official notification to shareholders of matters to be brought to a vote ("Proxy")	Apr 09, 2024	View HTML 0001097149-24-000018.pdf 0001097149-24-000018.xls EX-101.SCH - XBRL TAXONOMY EXTENSION SCHEMA
DEFA14A	Additional proxy soliciting materials - definitive	Apr 05, 2018	View HTML 0001097149-18-000016.pdf 0001097149-18-000016.xls
DEFA14A	Additional proxy soliciting materials - definitive	Apr 04, 2019	View HTML 0001097149-19-000013.pdf 0001097149-19-000013.xls
DEFA14A	Additional proxy soliciting materials - definitive	Apr 06, 2020	View HTML 0001097149-20-000017.pdf
DEFA14A	Additional proxy soliciting materials - definitive	May 08, 2020	View HTML 0001097149-20-000028.pdf
DEFA14A	Additional proxy soliciting materials - definitive	May 14, 2020	View HTML 0001097149-20-000034.pdf
DEFA14A	Additional proxy soliciting materials - definitive	Apr 07, 2021	View HTML 0001097149-21-000020.pdf
DEFA14A	Additional proxy soliciting materials - definitive	Apr 05, 2022	View HTML 0001097149-22-000016.pdf