CALAMOS CONVERTIBLE OPPORTUNITIES & INCOME FUND — SC 13D Filings

All 25 3 3/A 4 4/A 40-17G 40-17G/A 40-33 40-6C 40-6C/A 40-APP 40-APP/A 424B3 424B5 486BPOS 497 5 8-A12B 8-K APP NTC APP ORDR CERTNAS CERTNYS CORRESP DEF 14A EFFECT N-2 N-2 POSASR N-2/A N-23C-2 N-2ASR N-30D N-8A N-CEN N-CEN/A N-CSR N-CSR/A N-CSRS N-PX N-Q NO ACT NPORT-EX NPORT-P NSAR-A NSAR-A/A NSAR-B NSAR-B/A POS 8C POS EX SC 13D SC 13G SC 13G/A UPLOAD