$CRK SC 13G/A SEC Filings

10-C 10-K 10-K405 10-K/A 10-Q 10-Q/A 144 3 305B2 305B2/A 3/A 4 424A 424B1 424B2 424B3 424B5 425 4/A 5 8-A12B 8-A12G 8-K 8-K/A ARS CERT CERTNYS CORRESP DEF 14A DEFA14A DEFM14C EFFECT FWP NT 10-K NT 10-Q PRE 14A PREM14A PREM14C S-3 S-3/A S-3ASR S-3MEF S-4 S-4/A S-8 S-8 POS SC 13D SC 13D/A SC 13G SC 13G/A SCHEDULE 13G SCHEDULE 13G/A SC TO-C SC TO-I SC TO-I/A SC TO-T SC TO-T/A UPLOAD