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
ARS Annual report to shareholders Apr 28, 2026 Dec 31, 2025
10-K Annual report Feb 25, 2026 Dec 31, 2025
ARS Annual report to shareholders Apr 25, 2025 Dec 31, 2024
10-K Annual report Feb 26, 2025 Dec 31, 2024
ARS Annual report to shareholders Apr 25, 2024 Dec 31, 2023
10-K Annual report Feb 27, 2024 Dec 31, 2023
10-K Annual report Feb 28, 2023 Dec 31, 2022
10-K Annual report Feb 24, 2022 Dec 31, 2021
10-K/A Amended annual report Mar 29, 2021 Dec 31, 2020
10-K Annual report Feb 25, 2021 Dec 31, 2020
10-K Annual report Mar 24, 2020 Dec 31, 2019
10-K Annual report Mar 26, 2019 Dec 31, 2018

Showing 12 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)

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Source: SEC EDGAR filings. This is company-reported data, not investment advice.