Protagonist Therapeutics, INC (PTGX) SEC Filings — 2017 0 SEC filings for Protagonist Therapeutics, INC (PTGX) in 2017. FilingsNo filings found for PTGX in 2017. ExploreAll PTGX Filings · PTGX 2016 · PTGX 2018 · All 2017 Filings