Quick Takeaways
- BlackRock, Inc. filed SCHEDULE 13G/A for Alector, Inc. Common Stock (ALEC).
- Disclosed ownership: 4.7%.
- Date of event: 31 Dec 2025.
BlackRock, Inc. - 31 Dec 2025 SCHEDULE 13G/A Report for Alector, Inc. Common Stock (ALEC)
- Filing Manager
- BlackRock, Inc.
- Reporting Manager
- BlackRock, Inc.
- Security
- Alector, Inc. Common Stock
- Symbol
- ALEC
- Shares outstanding
- 110,208,617 shares
- Disclosed Ownership
- 5,179,805 shares
- Ownership
- 4.7%
- Form type
- SCHEDULE 13G/A
- Filing time
- 21 Jan 2026, 12:30:31 UTC
- Date of event
- 31 Dec 2025
- Previous filing
- 17 Oct 2025
- SEC
- View on sec.gov
Quoteable Key Fact
"BlackRock, Inc. disclosed 4.7% ownership in Alector, Inc. Common Stock (ALEC) on 31 Dec 2025."
What Changed
- Previous schedule filing date: 17 Oct 2025.
- Current filing was accepted on 21 Jan 2026, 12:30.
Why This Matters
- This page explains what this Schedule 13D/13G filing tells you before manager-level rows.
- You can verify ownership claims directly against the original SEC filing.
Source Evidence
Backed by Schedule 13D/13G
See Original Filing
Beneficial ownership values are sourced from the original SEC Schedule 13D/13G filing.
Reporting Managers (1)
| Name | Ownership | Shares Owned | sole voting power | shared voting power | Signature | Title | CIK |
|---|---|---|---|---|---|---|---|
| BlackRock, Inc. | 4.7% | 5,179,805 | 5,092,782 | 0 | Spencer Fleming | Managing Director |