$LDOS PRE 14A SEC Filings

10-K 10-K/A 10-KT 10-KT/A 10-Q 10-Q/A 11-K 144 15-12B 15-12B/A 15-12G 3 3/A 4 424B2 424B3 424B4 425 4/A 5 8-A12B 8-A12G 8-K 8-K/A ARS AW CERTNYS CORRESP CT ORDER DEF 14A DEFA14A DEFM14A EFFECT FWP NO ACT POS AM PRE 14A PREM14A PRER14A PX14A6G S-1 S-1/A S-3ASR S-4 S-4/A S-4 POS S-8 S-8 POS SC 13G SC 13G/A SCHEDULE 13G SCHEDULE 13G/A SD UPLOAD