Alector, Inc. Insider Trading Activity
Every SEC Form 4 insider transaction reported for Alector, Inc. (ALEC), sourced directly from SEC EDGAR and updated as new filings are accepted.
By Trabud · Insider-trading data from SEC EDGAR
Latest filing:
Compiled automatically from SEC EDGAR Form 4 filings and refreshed daily. Figures count purchases (code P) and sales (code S) only — not grants, option exercises, or gifts. How this page is built. Not investment advice.
Quick Answer
Are ALEC insiders buying or selling?
In the last 12 months, Alector, Inc. insiders reported 0 open-market purchases ($0) and 18 sales ($1.0M) — net selling of $1.0M. Since February 2019, Trabud has recorded 146 Form 4 filings for ALEC: 3 buys ($16.1M) and 143 sells ($180.9M).
Source: SEC EDGAR Form 4
Key Statistics (February 2019 – Sep 4, 2026)
Total Form 4 filings
146
SEC EDGAR
Insider filers
19
Insider buys (3)
$16.1M
Insider sells (143)
$180.9M
Insider sentiment
Net sellingNet insider flow of $164.7M in net selling since February 2019, and $1.0M in net selling over the last 12 months.
Recent ALEC insider transactions
| Date | Insider | Role | Type | Shares | Price | Value | Filing |
|---|---|---|---|---|---|---|---|
| Sep 4, 2026 | Grace Wong-Sarad | Principal Accounting Officer | Sale | 9.4K | $2.61 | $24.7K | SEC ↗ |
| Sep 4, 2026 | Neil Lindsay Berkley | CFO & Chief Business Officer | Sale | 29.3K | $2.66 | $77.9K | SEC ↗ |
| Sep 4, 2026 | Arnon Rosenthal | Chief Executive Officer | Sale | 72.6K | $2.66 | $193.5K | SEC ↗ |
| Jun 3, 2026 | Arnon Rosenthal | Chief Executive Officer | Sale | 87.2K | $1.97 | $172.2K | SEC ↗ |
| Jun 3, 2026 | Grace Wong-Sarad | Principal Accounting Officer | Sale | 9.2K | $1.94 | $17.8K | SEC ↗ |
| Jun 3, 2026 | Neil Lindsay Berkley | CFO & Chief Business Officer | Sale | 19.4K | $1.97 | $38.2K | SEC ↗ |
| Apr 17, 2026 | Grace Wong-Sarad | Principal Accounting Officer | Sale | 1.8K | $2.65 | $4.8K | SEC ↗ |
| Mar 12, 2026 | Grace Wong-Sarad | Principal Accounting Officer | Sale | 1.0K | $2.65 | $2.6K | SEC ↗ |
| Mar 3, 2026 | Grace Wong-Sarad | Principal Accounting Officer | Sale | 3.4K | $2.08 | $7.0K | SEC ↗ |
| Mar 3, 2026 | Grace Wong-Sarad | Principal Accounting Officer | Sale | 8.1K | $2.12 | $17.1K | SEC ↗ |
| Mar 3, 2026 | Arnon Rosenthal | Chief Executive Officer | Sale | 81.9K | $2.12 | $173.8K | SEC ↗ |
| Mar 3, 2026 | Neil Lindsay Berkley | CFO & Chief Business Officer | Sale | 29.6K | $2.12 | $63.0K | SEC ↗ |
| Feb 26, 2026 | Grace Wong-Sarad | Principal Accounting Officer | Sale | 4.1K | $2.50 | $10.2K | SEC ↗ |
| Dec 8, 2025 | Grace Wong-Sarad | Principal Accounting Officer | Sale | 4.8K | $1.21 | $5.8K | SEC ↗ |
| Dec 4, 2025 | Grace Wong-Sarad | Principal Accounting Officer | Sale | 8.1K | $1.12 | $9.0K | SEC ↗ |
| Dec 4, 2025 | Arnon Rosenthal | Chief Executive Officer | Sale | 104.3K | $1.12 | $116.8K | SEC ↗ |
| Dec 4, 2025 | Sara Kenkare-Mitra | President and Head of R&D | Sale | 41.7K | $1.12 | $46.7K | SEC ↗ |
| Dec 4, 2025 | Neil Lindsay Berkley | Chief Bus Ofcr & Interim CFO | Sale | 37.3K | $1.12 | $41.7K | SEC ↗ |
| Sep 4, 2025 | Grace Wong-Sarad | Principal Accounting Officer | Sale | 5.9K | $2.50 | $14.8K | SEC ↗ |
| Sep 4, 2025 | Neil Lindsay Berkley | Principal Financial Officer | Sale | 15.8K | $2.50 | $39.6K | SEC ↗ |
| Sep 4, 2025 | Sara Kenkare-Mitra | President and Head of R&D | Sale | 23.6K | $2.50 | $59.0K | SEC ↗ |
| Sep 4, 2025 | Arnon Rosenthal | Chief Executive Officer | Sale | 51.6K | $2.50 | $128.7K | SEC ↗ |
| Aug 27, 2025 | Paula Hammond | Director | Sale | 14.0K | $2.36 | $33.0K | SEC ↗ |
| Jun 23, 2025 | Kristine Yaffe | Director | Sale | 1.0K | $1.44 | $1.4K | SEC ↗ |
| Jun 4, 2025 | Marc Grasso | Chief Financial Officer | Sale | 16.5K | $1.34 | $22.1K | SEC ↗ |
Showing the 25 most recent of 146 Form 4 filings for Alector, Inc..
Most active ALEC insiders
- Robert Paul31 filings
- Arnon Rosenthal21 filings
- Sara Kenkare-Mitra11 filings
- Gary Romano10 filings
- Grace Wong-Sarad10 filings
Ask anything about ALEC insider activity
Use Trabud's AI agent to query Alector, Inc.'s Form 4 history in plain English — "Show me ALEC CEO purchases this year" or compare it against any other ticker.
Open the AI agentALEC insider trading FAQ
Are Alector, Inc. insiders buying or selling?
In the last 12 months, Alector, Inc. insiders reported 0 open-market purchases ($0) and 18 sales ($1.0M) — net selling of $1.0M. Since February 2019, Trabud has recorded 146 Form 4 filings for ALEC: 3 buys ($16.1M) and 143 sells ($180.9M). Over the full record that is net selling of $164.7M.
How many insiders trade ALEC stock?
19 distinct insider filers — officers, directors, 10%+ owners, and investment groups filing jointly — have reported Form 4 transactions for Alector, Inc.. The most recent filing was accepted on Sep 4, 2026.
Where does Trabud get ALEC insider trading data?
All ALEC insider trading data comes directly from official SEC EDGAR Form 4 filings, which corporate insiders must submit within two business days of a transaction under Section 16(a) of the Securities Exchange Act of 1934.