$ATRA SEC Filings

10-K 10-K/A 10-Q 144 3 4 424B1 424B3 424B4 424B5 4/A 8-A12B 8-K CERTNAS CORRESP CT ORDER DEF 14A DEFA14A DEFR14A DEL AM DRS DRS/A DRSLTR EFFECT FWP POS AM POSASR PRE 14A S-1 S-1/A S-1MEF S-3 S-3ASR S-8 SC 13D SC 13D/A SC 13G SC 13G/A SCHEDULE 13D SCHEDULE 13D/A SCHEDULE 13G SCHEDULE 13G/A UPLOAD