Alector, Inc.
ALEC- Exchange
- Nasdaq
- Industry
- Biological Products, (No Diagnostic Substances)
- SEC CIK
- 0001653087
In the last 90 days, Alector, Inc. insiders filed 0 open-market purchases and 3 sales; 140 institutions reported holding it in 13F filings for Q2 2026, worth $183.4M in total; no superinvestor holds it.
Q4 2025 vs. Q3 2025
How the institutions holding Alector, Inc. changed between Q3 2025 and Q4 2025.
All holders in Q4 2025All holders in Q3 2025
| Measure | Q3 2025 | Of which not filed for Q4 2025 | Q4 2025 | Change |
|---|---|---|---|---|
| Holders | 149 | 4 | 131 | −14 |
| Shares | 74.7M | 457.1K | 84.4M | +10.2M (+13.7%) |
| Value | $221.2M | $1.35M | $131.5M | −$88.3M (−40.2%) |
4 institutions that held it in Q3 2025 haven't filed for Q4 2025 yet. Not filing isn't selling, so the changes leave them out.
New holders (25)
Institutions that held Alector, Inc. at the end of Q4 2025 but not at the end of Q3 2025.
Sold out (39)
Institutions that held Alector, Inc. at the end of Q3 2025 and filed for Q4 2025 without it.
Not filed for Q4 2025 yet (4)
Institutions that held Alector, Inc. at the end of Q3 2025 and haven't filed a 13F for Q4 2025. Not filing isn't selling, so they aren't counted as sold out.
| Institution | Shares, Q3 2025 | Value, Q3 2025 |
|---|---|---|
| New Leaf Venture Partners, L.L.C. | 339,569 | $1.01M |
| Cubist Systematic Strategies, LLC | 100,067 | $296.2K |
| Point72 (DIFC) Ltd | 9,807 | $29.0K |
| Point72 Asia (Singapore) Pte. Ltd. | 7,636 | $22.6K |