// company-profile
Alector, Inc.
ALEC// activity-summary
Recent insider activity is bullish. Over the last 30 days, 15 insiders purchased shares versus 3 sales. Buying was led by DESOUZA ERROL B.
// 90-day insight
Over the last 90 days, Alector, Inc. insiders bought $0 (15 transactions) and sold $222K (3 transactions).
- Most active insider: Wong-Sarad Grace with 3 transactions totaling $23K.
- Largest single sale: $172K by Rosenthal Arnon on Jun 2, 2026.
- 40% of recent sales were pre-scheduled 10b5-1 trades — typically less informative than open-market activity.
Activity skews bullish — buys outpace sales.
Institutional Ownership
Top 13F-HR holders of Alector, Inc. as of 2026-03-31
Data source: SEC Form 13F-HR filings. Joined with insider activity above — see who's loading up institutionally while insiders are trading. Full 13F-HR API →
Insider Transactions
Sourced from SEC EDGAR Form 4 filings. Updated hourly.
| Date | Insider | Company | Type | Shares | Price | Value |
|---|---|---|---|---|---|---|
| Jun 17, 2026 | DESOUZA ERROL B | ALEC | Award | 28,700 | $0.00 | $0K |
| Jun 17, 2026 | Yaffe Kristine | ALEC | Award | 9,450 | $0.00 | $0K |
| Jun 17, 2026 | Altmeyer Mark | ALEC | Award | 28,700 | $0.00 | $0K |
| Jun 17, 2026 | LAVIGNE LOUIS J JR | ALEC | Award | 28,700 | $0.00 | $0K |
| Jun 17, 2026 | Yaffe Kristine | ALEC | Award | 28,700 | $0.00 | $0K |
45 more transactions hidden
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