NYSE: WES0001414475
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FormDescriptionDateFormat
424B5Form of prospectus disclosing information facts events covered in both forms 424B2 424B312/28/2012Open Form of prospectus disclosing information facts events covered in both forms 424B2 424B3 in HTML.Open Form of prospectus disclosing information facts events covered in both forms 424B2 424B3 in DOC file.Open Form of prospectus disclosing information facts events covered in both forms 424B2 424B3 in PDF file.Open Form of prospectus disclosing information facts events covered in both forms 424B2 424B3 in XLS file.
424B5Form of prospectus disclosing information facts events covered in both forms 424B2 424B310/10/2012Open Form of prospectus disclosing information facts events covered in both forms 424B2 424B3 in HTML.Open Form of prospectus disclosing information facts events covered in both forms 424B2 424B3 in DOC file.Open Form of prospectus disclosing information facts events covered in both forms 424B2 424B3 in PDF file.Open Form of prospectus disclosing information facts events covered in both forms 424B2 424B3 in XLS file.
424B3Form of prospectus reflecting facts events constituting substantive change from last form10/09/2012Open Form of prospectus reflecting facts events constituting substantive change from last form in HTML.Open Form of prospectus reflecting facts events constituting substantive change from last form in DOC file.Open Form of prospectus reflecting facts events constituting substantive change from last form in PDF file.Open Form of prospectus reflecting facts events constituting substantive change from last form in XLS file.
S-3Simplified registration form08/23/2012Open Simplified registration form in HTML.Open Simplified registration form in DOC file.Open Simplified registration form in PDF file.Open Simplified registration form in XLS file.
424B5Form of prospectus disclosing information facts events covered in both forms 424B2 424B306/22/2012Open Form of prospectus disclosing information facts events covered in both forms 424B2 424B3 in HTML.Open Form of prospectus disclosing information facts events covered in both forms 424B2 424B3 in DOC file.Open Form of prospectus disclosing information facts events covered in both forms 424B2 424B3 in PDF file.Open Form of prospectus disclosing information facts events covered in both forms 424B2 424B3 in XLS file.
424B3Form of prospectus reflecting facts events constituting substantive change from last form06/21/2012Open Form of prospectus reflecting facts events constituting substantive change from last form in HTML.Open Form of prospectus reflecting facts events constituting substantive change from last form in DOC file.Open Form of prospectus reflecting facts events constituting substantive change from last form in PDF file.Open Form of prospectus reflecting facts events constituting substantive change from last form in XLS file.
424B5Form of prospectus disclosing information facts events covered in both forms 424B2 424B306/19/2012Open Form of prospectus disclosing information facts events covered in both forms 424B2 424B3 in HTML.Open Form of prospectus disclosing information facts events covered in both forms 424B2 424B3 in DOC file.Open Form of prospectus disclosing information facts events covered in both forms 424B2 424B3 in PDF file.Open Form of prospectus disclosing information facts events covered in both forms 424B2 424B3 in XLS file.
424B3Form of prospectus reflecting facts events constituting substantive change from last form06/18/2012Open Form of prospectus reflecting facts events constituting substantive change from last form in HTML.Open Form of prospectus reflecting facts events constituting substantive change from last form in DOC file.Open Form of prospectus reflecting facts events constituting substantive change from last form in PDF file.Open Form of prospectus reflecting facts events constituting substantive change from last form in XLS file.