Company facts
- Headquarters
- South San Francisco, California
- Most recent report
- 10-Q, filed Nov 5, 2026
- Incorporated
- N/A
- Filings on record
- 631 filings
- On EDGAR
- CIK 1653087
- Fiscal year ends
- December
- Filer status
- Accelerated filer, Smaller reporting company
Financials 8 of 33
News 8 of 84
Prospectuses and Registrations 8 of 29
- 424B5 Prospectus supplement for an offering Oct 16, 2026
- FWP Free writing prospectus Oct 16, 2026
- 424B5 Prospectus supplement for an offering May 7, 2026
- S-3 Shelf registration statement Mar 12, 2026
- S-8 Registration statement for an employee plan Feb 25, 2026
- S-8 Registration statement for an employee plan Feb 26, 2025
- S-8 Registration statement for an employee plan Feb 27, 2024
- 424B5 Prospectus supplement for an offering Jan 19, 2024
Proxies 8 of 17
- DEFA14A Extra proxy material Apr 28, 2026
- DEF 14A Proxy statement for a shareholder vote Apr 28, 2026
- DEFA14A Extra proxy material Apr 24, 2025
- DEF 14A Proxy statement for a shareholder vote Apr 24, 2025
- DEFA14A Extra proxy material Apr 25, 2024
- DEF 14A Proxy statement for a shareholder vote Apr 25, 2024
- DEFA14A Extra proxy material Apr 27, 2023
- DEF 14A Proxy statement for a shareholder vote Apr 27, 2023
Ownership 8 of 434
- SCHEDULE 13G Large holder reported a passive stake Oct 26, 2026
- SCHEDULE 13G Large holder reported a passive stake Oct 23, 2026
- 4 Insider reported a trade Oct 15, 2026
- 4 Insider reported a trade Oct 15, 2026
- 4 Insider reported a trade Oct 15, 2026
- SCHEDULE 13G Large holder reported a passive stake Sep 18, 2026
- 4 Insider reported a trade Sep 4, 2026
- 4 Insider reported a trade Sep 4, 2026
Other 8 of 34
- EFFECT Notice that a registration became effective Apr 30, 2026
- CORRESP Reply to SEC staff Apr 28, 2026
- ARS Annual report sent to shareholders Apr 28, 2026
- UPLOAD Comment letter from SEC staff Mar 17, 2026
- ARS Annual report sent to shareholders Apr 25, 2025
- ARS Annual report sent to shareholders Apr 25, 2024
- EFFECT Notice that a registration became effective May 5, 2023
- EFFECT Notice that a registration became effective May 1, 2023
Everything here comes from Alector, Inc.'s own filings on SEC EDGAR. The filing list is rechecked every hour.