ALECHealthcareMicro-Cap
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 Research Team · SEC Form 4 & insider trading data analysts
Last updated:
Quick Answer
Are ALEC insiders buying or selling?
Alector, Inc. insiders reported 3 open-market buys ($16.1M) and 140 sells ($180.6M) across 143 Form 4 filings — a net selling position of $164.4M.
Source: SEC EDGAR Form 4
Key Statistics (as of Jun 3, 2026)
Total Form 4 filings
143
SEC EDGAR
Insider filers
19
Insider buys (3)
$16.1M
Insider sells (140)
$180.6M
Insider sentiment
Net sellingNet insider flow of $164.4M in net selling.
Recent ALEC insider transactions
| Date | Insider | Role | Type | Shares | Price | Value |
|---|---|---|---|---|---|---|
| Jun 3, 2026 | Rosenthal Arnon | Chief Executive Officer | Sale | 87.2K | $1.97 | $172.2K |
| Jun 3, 2026 | Grace Wong-Sarad | Principal Accounting Officer | Sale | 9.2K | $1.94 | $17.8K |
| Jun 3, 2026 | Neil Lindsay Berkley | CFO & Chief Business Officer | Sale | 19.4K | $1.97 | $38.2K |
| Apr 17, 2026 | Grace Wong-Sarad | Principal Accounting Officer | Sale | 1.8K | $2.65 | $4.8K |
| Mar 12, 2026 | Grace Wong-Sarad | Principal Accounting Officer | Sale | 1.0K | $2.65 | $2.6K |
| Mar 3, 2026 | Grace Wong-Sarad | Principal Accounting Officer | Sale | 3.4K | $2.08 | $7.0K |
| Mar 3, 2026 | Grace Wong-Sarad | Principal Accounting Officer | Sale | 8.1K | $2.12 | $17.1K |
| Mar 3, 2026 | Rosenthal Arnon | Chief Executive Officer | Sale | 81.9K | $2.12 | $173.8K |
| Mar 3, 2026 | Neil Lindsay Berkley | CFO & Chief Business Officer | Sale | 29.6K | $2.12 | $63.0K |
| Feb 26, 2026 | Grace Wong-Sarad | Principal Accounting Officer | Sale | 4.1K | $2.50 | $10.2K |
| Dec 8, 2025 | Grace Wong-Sarad | Principal Accounting Officer | Sale | 4.8K | $1.21 | $5.8K |
| Dec 4, 2025 | Grace Wong-Sarad | Principal Accounting Officer | Sale | 8.1K | $1.12 | $9.0K |
| Dec 4, 2025 | Rosenthal Arnon | Chief Executive Officer | Sale | 104.3K | $1.12 | $116.8K |
| Dec 4, 2025 | Sara Kenkare-Mitra | President and Head of R&D | Sale | 41.7K | $1.12 | $46.7K |
| Dec 4, 2025 | Neil Lindsay Berkley | Chief Bus Ofcr & Interim CFO | Sale | 37.3K | $1.12 | $41.7K |
| Sep 4, 2025 | Grace Wong-Sarad | Principal Accounting Officer | Sale | 5.9K | $2.50 | $14.8K |
| Sep 4, 2025 | Neil Lindsay Berkley | Principal Financial Officer | Sale | 15.8K | $2.50 | $39.6K |
| Sep 4, 2025 | Sara Kenkare-Mitra | President and Head of R&D | Sale | 23.6K | $2.50 | $59.0K |
| Sep 4, 2025 | Rosenthal Arnon | Chief Executive Officer | Sale | 51.6K | $2.50 | $128.7K |
| Aug 27, 2025 | Paula Hammond | Director | Sale | 14.0K | $2.36 | $33.0K |
| Jun 23, 2025 | Kristine Yaffe | Director | Sale | 1.0K | $1.44 | $1.4K |
| Jun 4, 2025 | Marc Grasso | Chief Financial Officer | Sale | 16.5K | $1.34 | $22.1K |
| Jun 4, 2025 | Sara Kenkare-Mitra | President and Head of R&D | Sale | 23.9K | $1.34 | $32.0K |
| Jun 4, 2025 | Rosenthal Arnon | Chief Executive Officer | Sale | 52.1K | $1.34 | $69.7K |
| Mar 5, 2025 | Sara Kenkare-Mitra | President and Head of R&D | Sale | 29.1K | $1.47 | $42.7K |
Showing the 25 most recent of 143 Form 4 filings for Alector, Inc..
Most active ALEC insiders
- Robert Paul31 filings
- Rosenthal Arnon20 filings
- Sara Kenkare-Mitra11 filings
- Gary Romano10 filings
- Marc Grasso10 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?
Across 143 SEC Form 4 filings, Alector, Inc. (ALEC) insiders reported 3 open-market purchases totaling $16.1M and 140 sales totaling $180.6M. That is a net selling position of $164.4M.
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 Jun 3, 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.
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