$NBR SC TO-I/A SEC Filings

10-K 10-K/A 10-Q 10-Q/A 144 25-NSE 3 4 424B2 424B3 424B5 425 4/A 5 8-A12B 8-A12B/A 8-A12G 8-K 8-K12G3 8-K/A ARS ARS/A CERT CERTNYS CORRESP D DEF 14A DEFA14A DEFR14A EFFECT FWP NO ACT POS AM PRE 14A PRER14A PX14A6G RW S-3 S-3ASR 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 SD T-3 UPLOAD