SEC Form 4
Alector, Inc. (ALEC) insider trading
In the 12 months to Oct 26, 2026, 4 ALEC insiders reported open-market sales of $1.0M across 18 filings; no open-market purchases were filed.
Latest filing · Last 12 months · Source: SEC EDGAR · How we count
- Open-market sales
- $1.0M
- 18 filings · 4 insiders
- Open-market purchases
- $0
- 0 filings
- Pre-arranged sales (10b5-1)
- 4 of 18
- $24.7K of $1.0M sold (2%)
Who traded ALEC, and when
- Sale
- Sale, pre-arranged (10b5-1)
ALEC daily close from Oct 27, 2025 to Oct 26, 2026, between $1.14 and $2.72, last $1.91. 18 sale and 0 purchase filings by 4 insiders, marked at their filing dates. Arnon Rosenthal, Chief Executive Officer: sold $656.3K across 4 filings, first filed Dec 3, 2025, last Sep 4, 2026. Neil Lindsay Berkley, Chief Bus Ofcr & Interim CFO → CFO & Chief Business Officer: sold $220.8K across 4 filings, first filed Dec 3, 2025, last Sep 4, 2026. Grace Wong-Sarad, Principal Accounting Officer: sold $99.1K across 9 filings, first filed Dec 3, 2025, last Sep 4, 2026. Sara Kenkare-Mitra, President and Head of R&D: sold $46.7K across 1 filing, first filed Dec 3, 2025, last Dec 3, 2025.
Largest mark · tap a row for others
Arnon Rosenthal · Chief Executive Officer
Sale $193,473
72,606 shares at $2.66 avg
Filed Sep 4, 2026 · traded Sep 3
Close on filing date $2.46
Arnon Rosenthal · Chief Executive Officer
Chief Executive Officer
$656.3K soldNeil Lindsay Berkley · Chief Bus Ofcr & Interim CFO → CFO & Chief Business Officer
Chief Bus Ofcr & Interim CFO → CFO & Chief Business Officer
$220.8K soldGrace Wong-Sarad · Principal Accounting Officer
Principal Accounting Officer
$99.1K soldSara Kenkare-Mitra · President and Head of R&D
President and Head of R&D
$46.7K soldOpen-market trades
18 filings in the last 12 months| Insider | Role | Sold | Bought | Filings | Pre-arranged (10b5-1) | Last filed |
|---|---|---|---|---|---|---|
| Arnon Rosenthal | Chief Executive Officer | $656.3K | — | 4 | — | |
| Neil Lindsay Berkley | Chief Bus Ofcr & Interim CFO → CFO & Chief Business Officer | $220.8K | — | 4 | — | |
| Grace Wong-Sarad | Principal Accounting Officer | $99.1K | — | 9 | 25% of sales | |
| Sara Kenkare-Mitra | President and Head of R&D | $46.7K | — | 1 | — |
| Filed | Insider | Type | Shares | Avg price | Value | Held after | Source |
|---|---|---|---|---|---|---|---|
traded | Neil Lindsay Berkley CFO & Chief Business Officer | Sale | 29,251 | $2.66 | $77.9K | 350,649 | |
traded | Arnon Rosenthal Chief Executive Officer | Sale | 72,606 | $2.66 | $193.5K | 2,294,600 | |
traded | Grace Wong-Sarad Principal Accounting Officer | Sale | 9,446 | $2.61 | $24.7K | 106,015 | |
traded | Neil Lindsay Berkley CFO & Chief Business Officer | Sale | 19,360 | $1.97 | $38.2K | 379,900 | |
traded | Grace Wong-Sarad Principal Accounting Officer | Sale | 9,184 | $1.94 | $17.8K | 95,461 | |
traded | Arnon Rosenthal Chief Executive Officer | Sale | 87,216 | $1.97 | $172.2K | 2,367,206 | |
traded | Grace Wong-Sarad Principal Accounting Officer | SalePre-arranged (10b5-1) | 1,820 | $2.65 | $4.8K | 104,645 | |
traded | Grace Wong-Sarad Principal Accounting Officer | SalePre-arranged (10b5-1) | 1,000 | $2.65 | $2.7K | 106,465 | |
traded | Arnon Rosenthal Chief Executive Officer | Sale | 81,864 | $2.12 | $173.8K | 2,338,176 | |
traded | Grace Wong-Sarad Principal Accounting Officer | Sale | 8,071 | $2.12 | $17.1K | 110,832 | |
traded | Grace Wong-Sarad Principal Accounting Officer | SalePre-arranged (10b5-1) | 3,367 | $2.08 | $7.0K | 107,465 | |
traded | Neil Lindsay Berkley CFO & Chief Business Officer | Sale | 29,649 | $2.12 | $63.0K | 344,660 | |
traded | Grace Wong-Sarad Principal Accounting Officer | SalePre-arranged (10b5-1) | 4,079 | $2.50 | $10.2K | 118,903 | |
traded | Grace Wong-Sarad Principal Accounting Officer | Sale | 4,753 | $1.21 | $5.8K | 122,982 | |
traded | Arnon Rosenthal Chief Executive Officer | Sale | 104,347 | $1.12 | $116.8K | 2,420,040 | |
traded | Sara Kenkare-Mitra President and Head of R&D | Sale | 41,687 | $1.12 | $46.7K | 501,652 | |
traded | Grace Wong-Sarad Principal Accounting Officer | Sale | 8,056 | $1.12 | $9.0K | 127,735 | |
traded | Neil Lindsay Berkley Chief Bus Ofcr & Interim CFO | Sale | 37,261 | $1.12 | $41.7K | 374,309 |
GET /stocks/filings/vX/form-4?tickers=ALEC&filing_date.gte=2025-10-26&sort=filing_date.desc&limit=500{
"status": "OK",
"results": [
{
"tickers": [
"ALEC"
],
"issuer_cik": "0001653087",
"owner_cik": "0002074667",
"accession_number": "0001193125-26-383858",
"form_type": "4",
"filing_date": "2026-09-04",
"period_of_report": "2026-09-02",
"issuer_name": "Alector, Inc.",
"issuer_trading_symbol": "ALEC",
"owner_name": "Wong-Sarad Grace",
"is_director": false,
"is_officer": true,
"is_ten_percent_owner": false,
"is_other": false,
"officer_title": "Principal Accounting Officer",
"security_type": "non_derivative",
"record_type": "transaction",
"security_title": "Common Stock",
"transaction_timeliness": "O",
"aff_10b5_one": false,
"transaction_date": "2026-09-02",
"transaction_code": "S",
"equity_swap_involved": false,
"transaction_shares": 656,
"transaction_price_per_share": 2.75,
"transaction_acquired_disposed": "D",
"shares_owned_following_transaction": 114805,
"transaction_value": 1804,
"direct_or_indirect": "D",
"footnotes": [
{
"id": "F1",
"description": "The sales reported in this Form 4 were effected pursuant to a Rule 10b5-1 Trading Plan adopted by the reporting person on September 5, 2025."
}
]
},
{
"tickers": [
"ALEC"
],
"issuer_cik": "0001653087",
"owner_cik": "0002074667",
"accession_number": "0001193125-26-383858",
"form_type": "4",
"filing_date": "2026-09-04",
"period_of_report": "2026-09-02",
"issuer_name": "Alector, Inc.",
"issuer_trading_symbol": "ALEC",
"owner_name": "Wong-Sarad Grace",
"is_director": false,
"is_officer": true,
"is_ten_percent_owner": false,
"is_other": false,
"officer_title": "Principal Accounting Officer",
"security_type": "non_derivative",
"record_type": "transaction",
"security_title": "Common Stock",
"transaction_timeliness": "O",
"aff_10b5_one": false,
"transaction_date": "2026-09-03",
"transaction_code": "S",
"equity_swap_involved": false,
"transaction_shares": 5165,
"transaction_price_per_share": 2.6655,
"transaction_acquired_disposed": "D",
"shares_owned_following_transaction": 109640,
"transaction_value": 13767.3075,
"direct_or_indirect": "D",
"footnotes": [
{
"id": "F2",
"description": "The reported shares were sold to satisfy the reporting person's tax obligations in connection with the vesting of restricted stock units, or RSUs."
},
{
"id": "F3",
"description": "The price reported in Column 4 is a weighted average price. The shares were sold in multiple transactions at prices ranging from $2.49 to $2.75. Full information regarding the number of shares sold at each separate price can be furnished to the SEC staff, the issuer, or any security holder of the issuer upon request."
}
]
}
]
}
// trimmed to 2 resultsThe response includes every Form 4 record; this page keeps open-market purchases and sales on common stock and removes duplicate joint-filer rows.
Other insider activity (not market trades) · 21 records
- Grants and awards17 records
- Gifts4 records
Reported on Form 4 but not purchases or sales in the market, so not counted in the totals above.
How to read this page
- Open-market purchase or sale
- A buy or sell of the company's stock at market price. Grants, option exercises, shares withheld for tax, gifts and employee stock plan purchases are listed separately and not counted.
- Pre-arranged (10b5-1)
- The insider marked the filing as made under a trading plan set up in advance (SEC Rule 10b5-1). The mark covers the whole filing, and an unmarked filing may still be under a plan.
- Role
- The title on each filing. Someone whose title changed shows more than one.
- Filing date
- Insiders have two business days to report a trade. Totals and the chart use the filing date, when the trade became public.
Frequently asked questions
Has Alector, Inc.'s CEO sold stock?
Yes. Arnon Rosenthal (CEO) sold 346,033 shares ($656.3K) between Dec 2025 and Sep 2026.
How current is ALEC’s insider data?
These are ALEC Form 4 filings from the last year, refreshed daily. The Massive Form 4 API has the full, continuously updated record.
What counts as an open-market buy or sell?
Only purchases and sales at the market price. Option exercises, grants, gifts, and shares withheld for taxes are reported on Form 4 but are left out of the buy and sell totals.
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