Company · CIK 1496323 # IGM Biosciences, Inc. | CIK | [1496323](https://www.sec.gov/cgi-bin/browse-edgar?action=getcompany&CIK=0001496323) (SEC EDGAR) | | --- | --- | | Industry (SIC) | 2834 — Pharmaceutical Preparations | | Incorporated in | DE | | Business address | CA | | Listed | no ticker on SEC record today | | First annual or quarterly report | 2019-11-07 | ## Offerings 6 registrations | Registration | Label and status | First filed | Last event | Filings | | --- | --- | --- | --- | --- | | 333-249863 | Shelf Effective | 2020-11-05 | 2025-08-14 | 5 | | 333-258641 | Shelf Effective | 2021-08-09 | 2025-08-14 | 3 | | 333-258644 | Shelf Effective | 2021-08-09 | 2025-08-14 | 5 | | 333-268136 | Shelf Effective | 2022-11-03 | 2025-08-14 | 5 | | 333-275519 | Shelf Effective | 2023-11-13 | 2025-08-14 | 3 | | 333-233365 | IPO Final prospectus | 2019-08-19 | 2019-09-18 | 5 | ## Filings 27 | Filed | Filing | Registration | Accession | | --- | --- | --- | --- | | 2025-08-14 | [EFFECT](https://www.sec.gov/Archives/edgar/data/1496323/999999999525002610/9999999995-25-002610-index.htm) Declared effective | 333-275519 | 9999999995-25-002610 | | 2025-08-14 | [EFFECT](https://www.sec.gov/Archives/edgar/data/1496323/999999999525002609/9999999995-25-002609-index.htm) Declared effective | 333-268136 | 9999999995-25-002609 | | 2025-08-14 | [EFFECT](https://www.sec.gov/Archives/edgar/data/1496323/999999999525002606/9999999995-25-002606-index.htm) Declared effective | 333-258644 | 9999999995-25-002606 | | 2025-08-14 | [EFFECT](https://www.sec.gov/Archives/edgar/data/1496323/999999999525002605/9999999995-25-002605-index.htm) Declared effective | 333-258641 | 9999999995-25-002605 | | 2025-08-14 | [EFFECT](https://www.sec.gov/Archives/edgar/data/1496323/999999999525002604/9999999995-25-002604-index.htm) Declared effective | 333-249863 | 9999999995-25-002604 | | 2023-11-17 | [EFFECT](https://www.sec.gov/Archives/edgar/data/1496323/999999999523003446/9999999995-23-003446-index.htm) Declared effective | 333-275519 | 9999999995-23-003446 | | 2023-11-13 | [S-3](https://www.sec.gov/Archives/edgar/data/1496323/000119312523276184/0001193125-23-276184-index.htm) Shelf registered | 333-275519 | 0001193125-23-276184 | | 2023-06-23 | [424B5](https://www.sec.gov/Archives/edgar/data/1496323/000119312523173871/0001193125-23-173871-index.htm) Shelf takedown | 333-268136 | 0001193125-23-173871 | | 2023-06-22 | [424B5](https://www.sec.gov/Archives/edgar/data/1496323/000119312523171732/0001193125-23-171732-index.htm) Shelf takedown | 333-268136 | 0001193125-23-171732 | | 2022-11-14 | [EFFECT](https://www.sec.gov/Archives/edgar/data/1496323/999999999522003298/9999999995-22-003298-index.htm) Declared effective | 333-268136 | 9999999995-22-003298 | | 2022-11-03 | [S-3](https://www.sec.gov/Archives/edgar/data/1496323/000119312522276933/0001193125-22-276933-index.htm) Shelf registered | 333-268136 | 0001193125-22-276933 | | 2022-03-30 | [424B5](https://www.sec.gov/Archives/edgar/data/1496323/000119312522090015/0001193125-22-090015-index.htm) Shelf takedown | 333-258644 | 0001193125-22-090015 | | 2022-03-29 | [424B5](https://www.sec.gov/Archives/edgar/data/1496323/000119312522087420/0001193125-22-087420-index.htm) Shelf takedown | 333-258644 | 0001193125-22-087420 | | 2021-08-19 | [EFFECT](https://www.sec.gov/Archives/edgar/data/1496323/999999999521003252/9999999995-21-003252-index.htm) Declared effective | 333-258644 | 9999999995-21-003252 | | 2021-08-19 | [EFFECT](https://www.sec.gov/Archives/edgar/data/1496323/999999999521003251/9999999995-21-003251-index.htm) Declared effective | 333-258641 | 9999999995-21-003251 | | 2021-08-09 | [S-3](https://www.sec.gov/Archives/edgar/data/1496323/000119312521240580/0001193125-21-240580-index.htm) Shelf registered | 333-258644 | 0001193125-21-240580 | | 2021-08-09 | [S-3](https://www.sec.gov/Archives/edgar/data/1496323/000119312521240574/0001193125-21-240574-index.htm) Shelf registered | 333-258641 | 0001193125-21-240574 | | 2020-12-09 | [424B5](https://www.sec.gov/Archives/edgar/data/1496323/000119312520313942/0001193125-20-313942-index.htm) Shelf takedown | 333-249863 | 0001193125-20-313942 | | 2020-12-07 | [424B5](https://www.sec.gov/Archives/edgar/data/1496323/000119312520311909/0001193125-20-311909-index.htm) Shelf takedown | 333-249863 | 0001193125-20-311909 | | 2020-11-12 | [EFFECT](https://www.sec.gov/Archives/edgar/data/1496323/999999999520003164/9999999995-20-003164-index.htm) Declared effective | 333-249863 | 9999999995-20-003164 | | 2020-11-05 | [S-3](https://www.sec.gov/Archives/edgar/data/1496323/000119312520286254/0001193125-20-286254-index.htm) Shelf registered | 333-249863 | 0001193125-20-286254 | | 2019-09-18 | [424B4](https://www.sec.gov/Archives/edgar/data/1496323/000119312519248338/0001193125-19-248338-index.htm) Final prospectus | 333-233365 | 0001193125-19-248338 | | 2019-09-17 | [EFFECT](https://www.sec.gov/Archives/edgar/data/1496323/999999999519002115/9999999995-19-002115-index.htm) Declared effective | 333-233365 | 9999999995-19-002115 | | 2019-09-17 | [S-1/A](https://www.sec.gov/Archives/edgar/data/1496323/000119312519246170/0001193125-19-246170-index.htm) Amendment | 333-233365 | 0001193125-19-246170 | | 2019-09-03 | [S-1/A](https://www.sec.gov/Archives/edgar/data/1496323/000119312519235724/0001193125-19-235724-index.htm) Amendment | 333-233365 | 0001193125-19-235724 | | 2019-08-19 | [S-1](https://www.sec.gov/Archives/edgar/data/1496323/000119312519224575/0001193125-19-224575-index.htm) Registration filed | 333-233365 | 0001193125-19-224575 | | 2019-06-28 | [DRS](https://www.sec.gov/Archives/edgar/data/1496323/000095012319006173/0000950123-19-006173-index.htm) Draft made public | 377-02717 | 0000950123-19-006173 | [All filings of this company](https://equitycapital.markets/filings?cik=1496323) · [CSV](https://equitycapital.markets/filings.csv?cik=1496323) --- Source page: https://equitycapital.markets/company/1496323 · Data: U.S. SEC EDGAR · CC BY 4.0