Company · CIK 1528115 # Annexon, Inc. | CIK | [1528115](https://www.sec.gov/cgi-bin/browse-edgar?action=getcompany&CIK=0001528115) (SEC EDGAR) | | --- | --- | | Industry (SIC) | 2834 — Pharmaceutical Preparations | | Incorporated in | DE | | Business address | CA | | Listed | ANNX (Nasdaq) | | First annual or quarterly report | 2020-09-08 | ## Offerings 6 registrations | Registration | Label and status | First filed | Last event | Filings | | --- | --- | --- | --- | --- | | 333-294758 | Shelf Effective | 2026-03-31 | 2026-03-31 | 1 | | 333-278246 | Shelf Effective | 2024-03-26 | 2025-11-13 | 7 | | 333-281493 | Shelf Effective | 2024-08-12 | 2024-08-15 | 2 | | 333-258863 | Shelf Effective | 2021-08-16 | 2023-12-21 | 3 | | 333-268181 | Shelf Effective | 2022-11-04 | 2022-11-16 | 2 | | 333-239647 | IPO Final prospectus | 2020-07-02 | 2020-07-24 | 5 | ## Filings 21 | Filed | Filing | Registration | Accession | | --- | --- | --- | --- | | 2026-03-31 | [S-3ASR](https://www.sec.gov/Archives/edgar/data/1528115/000119312526132688/0001193125-26-132688-index.htm) Shelf registered | 333-294758 | 0001193125-26-132688 | | 2025-11-13 | [424B5](https://www.sec.gov/Archives/edgar/data/1528115/000119312525280384/0001193125-25-280384-index.htm) Shelf takedown | 333-278246 | 0001193125-25-280384 | | 2025-11-12 | [424B5](https://www.sec.gov/Archives/edgar/data/1528115/000119312525277669/0001193125-25-277669-index.htm) Shelf takedown | 333-278246 | 0001193125-25-277669 | | 2024-08-15 | [EFFECT](https://www.sec.gov/Archives/edgar/data/1528115/999999999524002549/9999999995-24-002549-index.htm) Declared effective | 333-281493 | 9999999995-24-002549 | | 2024-08-12 | [S-3](https://www.sec.gov/Archives/edgar/data/1528115/000119312524198959/0001193125-24-198959-index.htm) Shelf registered | 333-281493 | 0001193125-24-198959 | | 2024-06-07 | [424B5](https://www.sec.gov/Archives/edgar/data/1528115/000119312524156429/0001193125-24-156429-index.htm) Shelf takedown | 333-278246 | 0001193125-24-156429 | | 2024-06-04 | [424B5](https://www.sec.gov/Archives/edgar/data/1528115/000119312524154391/0001193125-24-154391-index.htm) Shelf takedown | 333-278246 | 0001193125-24-154391 | | 2024-04-05 | [424B5](https://www.sec.gov/Archives/edgar/data/1528115/000119312524088458/0001193125-24-088458-index.htm) Shelf takedown | 333-278246 | 0001193125-24-088458 | | 2024-04-01 | [EFFECT](https://www.sec.gov/Archives/edgar/data/1528115/999999999524000818/9999999995-24-000818-index.htm) Declared effective | 333-278246 | 9999999995-24-000818 | | 2024-03-26 | [S-3](https://www.sec.gov/Archives/edgar/data/1528115/000119312524077697/0001193125-24-077697-index.htm) Shelf registered | 333-278246 | 0001193125-24-077697 | | 2023-12-21 | [424B5](https://www.sec.gov/Archives/edgar/data/1528115/000119312523301183/0001193125-23-301183-index.htm) Shelf takedown | 333-258863 | 0001193125-23-301183 | | 2022-11-16 | [EFFECT](https://www.sec.gov/Archives/edgar/data/1528115/999999999522003316/9999999995-22-003316-index.htm) Declared effective | 333-268181 | 9999999995-22-003316 | | 2022-11-04 | [S-3](https://www.sec.gov/Archives/edgar/data/1528115/000119312522277977/0001193125-22-277977-index.htm) Shelf registered | 333-268181 | 0001193125-22-277977 | | 2022-05-03 | [EFFECT](https://www.sec.gov/Archives/edgar/data/1528115/999999999522001281/9999999995-22-001281-index.htm) Declared effective | 333-258863 | 9999999995-22-001281 | | 2021-08-16 | [S-3ASR](https://www.sec.gov/Archives/edgar/data/1528115/000119312521247967/0001193125-21-247967-index.htm) Shelf registered | 333-258863 | 0001193125-21-247967 | | 2020-07-24 | [424B4](https://www.sec.gov/Archives/edgar/data/1528115/000119312520198635/0001193125-20-198635-index.htm) Final prospectus | 333-239647 | 0001193125-20-198635 | | 2020-07-23 | [EFFECT](https://www.sec.gov/Archives/edgar/data/1528115/999999999520001901/9999999995-20-001901-index.htm) Declared effective | 333-239647 | 9999999995-20-001901 | | 2020-07-23 | [S-1/A](https://www.sec.gov/Archives/edgar/data/1528115/000119312520197435/0001193125-20-197435-index.htm) Amendment | 333-239647 | 0001193125-20-197435 | | 2020-07-20 | [S-1/A](https://www.sec.gov/Archives/edgar/data/1528115/000119312520195043/0001193125-20-195043-index.htm) Amendment | 333-239647 | 0001193125-20-195043 | | 2020-07-02 | [S-1](https://www.sec.gov/Archives/edgar/data/1528115/000119312520186799/0001193125-20-186799-index.htm) Registration filed | 333-239647 | 0001193125-20-186799 | | 2019-09-18 | [DRS](https://www.sec.gov/Archives/edgar/data/1528115/000095012319008962/0000950123-19-008962-index.htm) Draft made public | 377-02837 | 0000950123-19-008962 | [All filings of this company](https://equitycapital.markets/filings?cik=1528115) · [CSV](https://equitycapital.markets/filings.csv?cik=1528115) --- Source page: https://equitycapital.markets/company/1528115 · Data: U.S. SEC EDGAR · CC BY 4.0