$OPRT 4 SEC Filings

10-K 10-K/A 10-Q 10-Q/A 144 144/A 3 4 424B3 424B4 4/A 8-A12B 8-K 8-K/A ARS CERT CORRESP CT ORDER D DEF 14A DEFA14A DEFC14A DEFR14A DFAN14A DRS DRS/A DRSLTR EFFECT PRE 14A PREC14A PRER14A PRRN14A S-1 S-1/A S-3 S-3/A S-8 SC 13D SC 13D/A SC 13G SC 13G/A SCHEDULE 13D/A SCHEDULE 13G SCHEDULE 13G/A SEC STAFF LETTER UPLOAD