Company · CIK 1377121 # Protagonist Therapeutics, Inc | CIK | [1377121](https://www.sec.gov/cgi-bin/browse-edgar?action=getcompany&CIK=0001377121) (SEC EDGAR) | | --- | --- | | Industry (SIC) | 2834 — Pharmaceutical Preparations | | Incorporated in | DE | | Business address | CA | | Listed | PTGX (Nasdaq) | | First annual or quarterly report | 2016-09-15 | ## Offerings 7 registrations | Registration | Label and status | First filed | Last event | Filings | | --- | --- | --- | --- | --- | | 333-289313 | Shelf Effective | 2025-08-06 | 2025-08-06 | 1 | | 333-227216 | Shelf Effective | 2018-09-07 | 2023-08-11 | 3 | | 333-266595 | Shelf Effective | 2022-08-05 | 2023-04-06 | 4 | | 333-251254 | Shelf Effective | 2020-12-10 | 2021-06-17 | 5 | | 333-234414 | Shelf Effective | 2019-10-31 | 2020-05-13 | 5 | | 333-220314 | Shelf Effective | 2017-09-01 | 2018-08-07 | 5 | | 333-212476 | IPO Final prospectus | 2016-07-11 | 2016-08-12 | 5 | ## Filings 29 | Filed | Filing | Registration | Accession | | --- | --- | --- | --- | | 2025-08-06 | [S-3ASR](https://www.sec.gov/Archives/edgar/data/1377121/000110465925074748/0001104659-25-074748-index.htm) Shelf registered | 333-289313 | 0001104659-25-074748 | | 2023-08-11 | [424B5](https://www.sec.gov/Archives/edgar/data/1377121/000110465923090520/0001104659-23-090520-index.htm) Shelf takedown | 333-227216 | 0001104659-23-090520 | | 2023-04-06 | [424B5](https://www.sec.gov/Archives/edgar/data/1377121/000110465923042274/0001104659-23-042274-index.htm) Shelf takedown | 333-266595 | 0001104659-23-042274 | | 2023-04-04 | [424B5](https://www.sec.gov/Archives/edgar/data/1377121/000110465923041529/0001104659-23-041529-index.htm) Shelf takedown | 333-266595 | 0001104659-23-041529 | | 2022-08-16 | [EFFECT](https://www.sec.gov/Archives/edgar/data/1377121/999999999522002399/9999999995-22-002399-index.htm) Declared effective | 333-266595 | 9999999995-22-002399 | | 2022-08-05 | [S-3](https://www.sec.gov/Archives/edgar/data/1377121/000110465922086733/0001104659-22-086733-index.htm) Shelf registered | 333-266595 | 0001104659-22-086733 | | 2021-06-17 | [424B5](https://www.sec.gov/Archives/edgar/data/1377121/000110465921082601/0001104659-21-082601-index.htm) Shelf takedown | 333-251254 | 0001104659-21-082601 | | 2021-06-14 | [424B5](https://www.sec.gov/Archives/edgar/data/1377121/000110465921080855/0001104659-21-080855-index.htm) Shelf takedown | 333-251254 | 0001104659-21-080855 | | 2020-12-14 | [424B5](https://www.sec.gov/Archives/edgar/data/1377121/000110465920134892/0001104659-20-134892-index.htm) Shelf takedown | 333-251254 | 0001104659-20-134892 | | 2020-12-10 | [424B5](https://www.sec.gov/Archives/edgar/data/1377121/000110465920133946/0001104659-20-133946-index.htm) Shelf takedown | 333-251254 | 0001104659-20-133946 | | 2020-12-10 | [S-3ASR](https://www.sec.gov/Archives/edgar/data/1377121/000110465920133938/0001104659-20-133938-index.htm) Shelf registered | 333-251254 | 0001104659-20-133938 | | 2020-05-13 | [424B5](https://www.sec.gov/Archives/edgar/data/1377121/000104746920003025/0001047469-20-003025-index.htm) Shelf takedown | 333-234414 | 0001047469-20-003025 | | 2020-05-11 | [424B5](https://www.sec.gov/Archives/edgar/data/1377121/000104746920002943/0001047469-20-002943-index.htm) Shelf takedown | 333-234414 | 0001047469-20-002943 | | 2019-11-27 | [424B5](https://www.sec.gov/Archives/edgar/data/1377121/000104746919006551/0001047469-19-006551-index.htm) Shelf takedown | 333-234414 | 0001047469-19-006551 | | 2019-11-22 | [EFFECT](https://www.sec.gov/Archives/edgar/data/1377121/999999999519002648/9999999995-19-002648-index.htm) Declared effective | 333-234414 | 9999999995-19-002648 | | 2019-10-31 | [S-3](https://www.sec.gov/Archives/edgar/data/1377121/000104746919006014/0001047469-19-006014-index.htm) Shelf registered | 333-234414 | 0001047469-19-006014 | | 2018-09-21 | [EFFECT](https://www.sec.gov/Archives/edgar/data/1377121/999999999518002437/9999999995-18-002437-index.htm) Declared effective | 333-227216 | 9999999995-18-002437 | | 2018-09-07 | [S-3](https://www.sec.gov/Archives/edgar/data/1377121/000104746918006015/0001047469-18-006015-index.htm) Shelf registered | 333-227216 | 0001047469-18-006015 | | 2018-08-07 | [424B5](https://www.sec.gov/Archives/edgar/data/1377121/000104746918005447/0001047469-18-005447-index.htm) Shelf takedown | 333-220314 | 0001047469-18-005447 | | 2017-10-13 | [424B5](https://www.sec.gov/Archives/edgar/data/1377121/000104746917006363/0001047469-17-006363-index.htm) Shelf takedown | 333-220314 | 0001047469-17-006363 | | 2017-10-11 | [424B5](https://www.sec.gov/Archives/edgar/data/1377121/000104746917006316/0001047469-17-006316-index.htm) Shelf takedown | 333-220314 | 0001047469-17-006316 | | 2017-10-05 | [EFFECT](https://www.sec.gov/Archives/edgar/data/1377121/999999999517002597/9999999995-17-002597-index.htm) Declared effective | 333-220314 | 9999999995-17-002597 | | 2017-09-01 | [S-3](https://www.sec.gov/Archives/edgar/data/1377121/000104746917005511/0001047469-17-005511-index.htm) Shelf registered | 333-220314 | 0001047469-17-005511 | | 2016-08-12 | [424B4](https://www.sec.gov/Archives/edgar/data/1377121/000119312516679590/0001193125-16-679590-index.htm) Final prospectus | 333-212476 | 0001193125-16-679590 | | 2016-08-10 | [EFFECT](https://www.sec.gov/Archives/edgar/data/1377121/999999999516005408/9999999995-16-005408-index.htm) Declared effective | 333-212476 | 9999999995-16-005408 | | 2016-08-09 | [S-1/A](https://www.sec.gov/Archives/edgar/data/1377121/000119312516675649/0001193125-16-675649-index.htm) Amendment | 333-212476 | 0001193125-16-675649 | | 2016-08-01 | [S-1/A](https://www.sec.gov/Archives/edgar/data/1377121/000119312516665762/0001193125-16-665762-index.htm) Amendment | 333-212476 | 0001193125-16-665762 | | 2016-07-11 | [S-1](https://www.sec.gov/Archives/edgar/data/1377121/000119312516645574/0001193125-16-645574-index.htm) Registration filed | 333-212476 | 0001193125-16-645574 | | 2016-05-03 | [DRS](https://www.sec.gov/Archives/edgar/data/1377121/000095012316016160/0000950123-16-016160-index.htm) Draft made public | 377-01318 | 0000950123-16-016160 | [All filings of this company](https://equitycapital.markets/filings?cik=1377121) · [CSV](https://equitycapital.markets/filings.csv?cik=1377121) --- Source page: https://equitycapital.markets/company/1377121 · Data: U.S. SEC EDGAR · CC BY 4.0