ALEC insider trading — Alector, Inc.
Over the last 90 days, insiders at Alector, Inc. (ALEC) made 0 open-market purchases worth $0 and 5 open-market sales worth $296K, making them net sellers by $296K. The largest sale was by Rosenthal Arnon (Chief Executive Officer), who sold 72,606 shares for $193K on Sep 3, 2026.
Updated Oct 16, 2026.
Recent ALEC insider transactions
Every Form 4 filed by Alector, Inc. officers, directors and 10% owners in the last 90 days, newest first. P = open-market purchase, S = open-market sale; other codes are awards, option exercises, tax withholding or gifts.
| Trade date | Insider | Role | Type | Ownership | Shares | Price | Value | Filing |
|---|---|---|---|---|---|---|---|---|
| Oct 14, 2026 | Wong-Sarad Grace | Principal Accounting Officer | A · Grant/award | Direct | 55,555 | — | — | Form 4 |
| Oct 14, 2026 | Rosenthal Arnon | Chief Executive Officer | A · Grant/award | Direct | 217,500 | — | — | Form 4 |
| Oct 14, 2026 | Berkley Neil Lindsay | CFO & Chief Business Officer | A · Grant/award | Direct | 44,567 | — | — | Form 4 |
| Sep 4, 2026 | Wong-Sarad Grace | Principal Accounting Officer | S · Sale | Direct | 3,625 | $2.51 | $9K | Form 4 |
| Sep 3, 2026 | Berkley Neil Lindsay | CFO & Chief Business Officer | S · Sale | Direct | 29,251 | $2.66 | $78K | Form 4 |
| Sep 3, 2026 | Rosenthal Arnon | Chief Executive Officer | S · Sale | Direct | 72,606 | $2.66 | $193K | Form 4 |
| Sep 3, 2026 | Wong-Sarad Grace | Principal Accounting Officer | S · Sale | Direct | 5,165 | $2.67 | $14K | Form 4 |
| Sep 2, 2026 | Wong-Sarad Grace | Principal Accounting Officer | S · Sale | Direct | 656 | $2.75 | $2K | Form 4 |
| Aug 19, 2026 | Rosenthal Arnon | Chief Executive Officer | G · Gift | Indirect | 1,050,000 | — | — | Form 4 |
| Aug 19, 2026 | Rosenthal Arnon | Chief Executive Officer | G · Gift | Indirect | 1,050,000 | — | — | Form 4 |
ALEC insider trading FAQ
Are insiders buying ALEC stock?
Not on the open market. In the last 90 days, Alector, Inc. insiders made no open-market purchases, and 5 open-market sales totaling $296K. Purchases with the insider's own money are generally seen as a stronger signal than sales, which happen for many reasons (taxes, diversification, planned 10b5-1 sales).
Who are the insiders trading ALEC?
Recent sellers: Berkley Neil Lindsay, Rosenthal Arnon, Wong-Sarad Grace.
Where does ALEC insider trading data come from?
Every transaction comes from SEC Form 4 filings on EDGAR. Company officers, directors and 10% owners must file a Form 4 within two business days of buying or selling. InsiderBolt reads these filings directly from the SEC.
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Insider trading data is for informational purposes only and is not investment advice. Filings can be amended; always confirm details on SEC EDGAR.