$PRTA 8-K SEC Filings

10-12B 10-12B/A 10-K 10-K/A 10-Q 10-Q/A 144 3 3/A 4 424B3 424B4 424B5 4/A 5 8-K 8-K/A ARS CERTNAS CORRESP CT ORDER D DEF 14A DEFA14A EFFECT POS AM POSASR PRE 14A S-1 S-1/A S-1MEF S-3 S-3/A S-3ASR S-3MEF S-8 SC 13D SC 13D/A SC 13G SC 13G/A SCHEDULE 13D/A SCHEDULE 13G SCHEDULE 13G/A SC TO-I SC TO-I/A UPLOAD