<ACCESSION-NUMBER>0001287032-19-000387 <TYPE>497 <PUBLIC-DOCUMENT-COUNT>156 <FILING-DATE>20191118 <DATE-OF-FILING-DATE-CHANGE>20191118 <EFFECTIVENESS-DATE>20191118 <FILER> <COMPANY-DATA> <CONFORMED-NAME>PROSPECT CAPITAL CORP <CIK>0001287032 <IRS-NUMBER>432048643 <STATE-OF-INCORPORATION>MD <FISCAL-YEAR-END>0630 </COMPANY-DATA> <FILING-VALUES> <FORM-TYPE>497 <ACT>33 <FILE-NUMBER>333-232998 <FILM-NUMBER>191227730 </FILING-VALUES> <BUSINESS-ADDRESS> <STREET1>10 EAST 40TH STREET 44TH FL <CITY>NEW YORK <STATE>NY <ZIP>10016 <PHONE>212-448-0702 </BUSINESS-ADDRESS> <MAIL-ADDRESS> <STREET1>10 EAST 40TH STREET 44TH FL <CITY>NEW YORK <STATE>NY <ZIP>10016 </MAIL-ADDRESS> <FORMER-COMPANY> <FORMER-CONFORMED-NAME>PROSPECT ENERGY CORP <DATE-CHANGED>20040623 </FORMER-COMPANY> <FORMER-COMPANY> <FORMER-CONFORMED-NAME>PROSPECT STREET ENERGY CORP <DATE-CHANGED>20040414 </FORMER-COMPANY> </FILER>