Alector, Inc. SEC filings ALEC
Alector, Inc. has 631 filings in SEC EDGAR's recent list, going back to Sep 16, 2015. Its latest annual report, Form ARS, was filed on Apr 28, 2026 for the period ended Dec 31, 2025. The latest quarterly report (Form 10-Q) was filed on Nov 5, 2026, covering the quarter ended Sep 30, 2026. The most recent current report (Form 8-K) was filed on Nov 5, 2026 (results of operations). The company's fiscal year ends on December 31.
| Form | Description | Filed | Period |
|---|---|---|---|
| EFFECT | Filing | Apr 30, 2026 | — |
| CORRESP | Letter to the SEC | Apr 28, 2026 | — |
| UPLOAD | Letter from the SEC | Mar 17, 2026 | — |
| EFFECT | Filing | May 5, 2023 | — |
| EFFECT | Filing | May 1, 2023 | — |
| CORRESP | Letter to the SEC | Apr 27, 2023 | — |
| UPLOAD | Letter from the SEC | Mar 7, 2023 | — |
| DEFR14A | Filing | May 27, 2022 | — |
| EFFECT | Filing | Jan 29, 2020 | — |
| CORRESP | Letter to the SEC | Jan 27, 2020 | — |
| CORRESP | Letter to the SEC | Jan 27, 2020 | — |
| UPLOAD | Letter from the SEC | Dec 4, 2019 | — |
| DRSLTR | Filing | Dec 2, 2019 | — |
| DRS | Filing | Dec 2, 2019 | — |
| EFFECT | Filing | Feb 6, 2019 | — |
| CT ORDER | Filing | Feb 6, 2019 | — |
| CORRESP | Letter to the SEC | Feb 4, 2019 | — |
| CORRESP | Letter to the SEC | Feb 4, 2019 | — |
| CERT | Filing | Feb 4, 2019 | — |
| 8-A12B | Filing | Jan 31, 2019 | — |
| CORRESP | Letter to the SEC | Jan 7, 2019 | — |
| CORRESP | Letter to the SEC | Jan 7, 2019 | — |
| UPLOAD | Letter from the SEC | Dec 20, 2018 | — |
| DRSLTR | Filing | Dec 17, 2018 | — |
| UPLOAD | Letter from the SEC | Dec 4, 2018 | — |
| DRSLTR | Filing | Nov 16, 2018 | — |
| DRS/A | Filing | Nov 16, 2018 | — |
| UPLOAD | Letter from the SEC | Nov 7, 2018 | — |
| DRSLTR | Filing | Oct 12, 2018 | — |
| DRS | Filing | Oct 12, 2018 | — |
| D | Filing | Sep 16, 2015 | — |
Showing 31 filings. Main filings leave out insider and ownership forms such as Form 4; choose a type above to see them. Each form opens on SEC.gov. Older filings are on SEC EDGAR.
New to this? Read What Are SEC Filings? 10-K, 10-Q, 8-K and Other Forms Explained.
Company profile
- Industry
- Biological Products, (No Diagnostic Substances) (SIC 2836)
- Listed as
- ALEC (Nasdaq)
- Fiscal year ends
- December 31
- Headquarters
- South San Francisco, CA
- SEC filer status
- Accelerated filer, Smaller reporting company
- SEC CIK
- 1653087
- Former names
- Alector LLC (until Sep 16, 2015)
Other Biological Products, (No Diagnostic Substances) companies
- Amgen Inc AMGN
- Gilead Sciences, Inc. GILD
- Moderna, Inc. MRNA
- Argenx SE ARGX
- Revolution Medicines, Inc. RVMD
- Biogen Inc. BIIB
- BioNTech SE BNTX
- Exelixis, Inc. EXEL
All 182 Biological Products, (No Diagnostic Substances) companies
Source: SEC EDGAR filings. This is company-reported data, not investment advice.