Protagonist Therapeutics, INC (PTGX) SEC Filings — 2019 0 SEC filings for Protagonist Therapeutics, INC (PTGX) in 2019. FilingsNo filings found for PTGX in 2019. ExploreAll PTGX Filings · PTGX 2018 · PTGX 2020 · All 2019 Filings