Quick Takeaways
- Polaris Venture Partners VI, L.P. filed SCHEDULE 13G/A for Alector, Inc. Common Stock, $0.0001 par value per share (ALEC).
- Disclosed ownership: 6.5%.
- Date of event: 30 Sep 2025.
Polaris Venture Partners VI, L.P. - 30 Sep 2025 SCHEDULE 13G/A Report for Alector, Inc. Common Stock, $0.0001 par value per share (ALEC)
- Filing Manager
- Polaris Venture Partners VI, L.P.
- Reporting Manager
- Terrance G. McGuire
- Symbol
- ALEC
- Shares outstanding
- 109,157,708 shares
- Disclosed Ownership
- 7,095,251 shares
- Ownership
- 6.5%
- Form type
- SCHEDULE 13G/A
- Filing time
- 13 Nov 2025, 16:41:55 UTC
- Date of event
- 30 Sep 2025
- Next filing
- 14 May 2026
- SEC
- View on sec.gov
Quoteable Key Fact
"Polaris Venture Partners VI, L.P. disclosed 6.5% ownership in Alector, Inc. Common Stock, $0.0001 par value per share (ALEC) on 30 Sep 2025."
What Changed
- No earlier schedule filing is available for direct comparison.
- Current filing was accepted on 13 Nov 2025, 16:41.
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 (11)
| Name | Ownership | Shares Owned | sole voting power | shared voting power | Signature | Title | CIK |
|---|---|---|---|---|---|---|---|
| Polaris Venture Partners VI, L.P. | 0.5% | 498,468 | 498,468 | 0 | /s/ Lauren Crockett | Lauren Crockett/ Authorized Signatory of Polaris Venture Management Co. VI, L.L.C., general partner of Polaris Venture Partners VI, L.P. | |
| Polaris Venture Partners Founders' Fund VI, L.P. | 0.3% | 378,403 | 378,403 | 0 | /s/ Lauren Crockett | Lauren Crockett/ Authorized Signatory of Polaris Venture Management Co. VI, L.L.C., GP of Polaris Venture Partners Founders' Fund VI, L.P. | |
| Polaris Venture Partners VI (AIV), L.P. | 4.4% | 4,797,563 | 4,797,563 | 0 | /s/ Lauren Crockett | Lauren Crockett/ Authorized Signatory of Polaris Venture Management Co. VI, L.L.C., general partner of Polaris Venture Partners VI (AIV), L.P. | |
| Polaris Venture Partners VI (AIV-B), L.P. | 1.1% | 1,179,383 | 1,179,383 | 0 | /s/ Lauren Crockett | Lauren Crockett/ Authorized Signatory of Polaris Venture Management Co. VI, L.L.C., general partner of Polaris Venture Partners VI (AIV-B), L.P. | |
| Polaris Venture Management Co VI, L.L.C. | 6.3% | 6,853,817 | 0 | 6,853,817 | /s/ Lauren Crockett | Lauren Crockett/ Authorized Signatory* | |
| David Barrett | 6.3% | 6,880,071 | 26,254 | 6,853,817 | /s/ Lauren Crockett | Lauren Crockett/ Attorney-In-Fact | |
| Brian Chee | 6.3% | 6,880,084 | 26,267 | 6,853,817 | /s/ Lauren Crockett | Lauren Crockett/ Attorney-In-Fact | |
| Jonathan A. Flint | 6.3% | 6,892,942 | 39,125 | 6,853,817 | /s/ Lauren Crockett | Lauren Crockett/ Attorney-In-Fact | |
| Terrance G. McGuire | 6.5% | 7,095,251 | 241,434 | 6,853,817 | /s/ Lauren Crockett | Lauren Crockett/ Attorney-In-Fact | |
| Amir Nashat | 6.4% | 6,932,617 | 78,800 | 6,853,817 | /s/ Lauren Crockett | Lauren Crockett/ Attorney-In-Fact | |
| Bryce Youngren | 6.4% | 6,945,149 | 91,332 | 6,853,817 | /s/ Lauren Crockett | Lauren Crockett/ Attorney-In-Fact |