Protagonist Therapeutics, INC (PTGX) SEC Filings — 2020 0 SEC filings for Protagonist Therapeutics, INC (PTGX) in 2020. FilingsNo filings found for PTGX in 2020. ExploreAll PTGX Filings · PTGX 2019 · PTGX 2021 · All 2020 Filings