ALEC insider buying and SEC filings, explained
Alector, Inc. · CIK 1653087
Tracked: Forms 3/4/5, 8-K, NT · All filings on sec.gov
Insider activity in the last 12 months
Bought
$0
Insiders who bought
0
Sold (not marked 10b5-1)
$974K
Planned sales (10b5-1)
$48K
Insider purchases and sales, last 12 months
| Traded | Type | What was filed | Source |
|---|---|---|---|
| Sep 3, 2026 | Sale | Arnon Rosenthal (CEO and Director) sold 72,606 shares at about $2.66 ($193K). Holdings down 3% to 2,294,600 shares. Not marked as a 10b5-1 plan trade. | SEC filing Filed Sep 4, 2026 |
| Sep 3, 2026 | Sale | Neil Lindsay Berkley (CFO) sold 29,251 shares at about $2.66 ($78K). Holdings down 8% to 350,649 shares. Not marked as a 10b5-1 plan trade. | SEC filing Filed Sep 4, 2026 |
| Sep 2–4, 2026 | Planned (10b5-1) | Grace Wong-Sarad (Principal Accounting Officer) sold 4,281 shares between Sep 2 and Sep 4 at about $2.55 ($11K), marked as a 10b5-1 plan trade. Holdings down 4% to 106,015 shares. | SEC filing Filed Sep 4, 2026 |
| Sep 3, 2026 | Sale | Grace Wong-Sarad (Principal Accounting Officer) sold 5,165 shares at about $2.67 ($14K). Holdings down 4% to 109,640 shares. Not marked as a 10b5-1 plan trade. | SEC filing Filed Sep 4, 2026 |
| Jun 2, 2026 | Sale | Arnon Rosenthal (CEO and Director) sold 87,216 shares at about $1.97 ($172K). Holdings down 4% to 2,367,206 shares. Not marked as a 10b5-1 plan trade. | SEC filing Filed Jun 3, 2026 |
| Jun 3, 2026 | Planned (10b5-1) | Grace Wong-Sarad (Principal Accounting Officer) sold 3,475 shares at about $1.88 ($7K), marked as a 10b5-1 plan trade. Holdings down 4% to 95,461 shares. | SEC filing Filed Jun 3, 2026 |
| Jun 2, 2026 | Sale | Grace Wong-Sarad (Principal Accounting Officer) sold 5,709 shares at about $1.97 ($11K). Holdings down 5% to 98,936 shares. Not marked as a 10b5-1 plan trade. | SEC filing Filed Jun 3, 2026 |
| Jun 2, 2026 | Sale | Neil Lindsay Berkley (CFO) sold 19,360 shares at about $1.97 ($38K). Holdings down 5% to 379,900 shares. Not marked as a 10b5-1 plan trade. | SEC filing Filed Jun 3, 2026 |
| Apr 16, 2026 | Planned (10b5-1) | Grace Wong-Sarad (Principal Accounting Officer) sold 1,820 shares at $2.65 ($5K), marked as a 10b5-1 plan trade. Holdings down 2% to 104,645 shares. | SEC filing Filed Apr 17, 2026 |
| Mar 10, 2026 | Planned (10b5-1) | Grace Wong-Sarad (Principal Accounting Officer) sold 1,000 shares at $2.65 ($3K), marked as a 10b5-1 plan trade. Holdings down 1% to 106,465 shares. | SEC filing Filed Mar 12, 2026 |
| Mar 3, 2026 | Planned (10b5-1) | Grace Wong-Sarad (Principal Accounting Officer) sold 3,367 shares at about $2.08 ($7K), marked as a 10b5-1 plan trade. Holdings down 3% to 107,465 shares. | SEC filing Filed Mar 3, 2026 |
| Mar 2, 2026 | Sale | Neil Lindsay Berkley (CFO) sold 29,649 shares at about $2.12 ($63K). Holdings down 8% to 344,660 shares. Not marked as a 10b5-1 plan trade. | SEC filing Filed Mar 3, 2026 |
| Mar 2, 2026 | Sale | Grace Wong-Sarad (Principal Accounting Officer) sold 8,071 shares at about $2.12 ($17K). Holdings down 7% to 110,832 shares. Not marked as a 10b5-1 plan trade. | SEC filing Filed Mar 3, 2026 |
| Mar 2, 2026 | Sale | Arnon Rosenthal (CEO and Director) sold 81,864 shares at about $2.12 ($174K). Holdings down 3% to 2,338,176 shares. Not marked as a 10b5-1 plan trade. | SEC filing Filed Mar 3, 2026 |
| Feb 26, 2026 | Planned (10b5-1) | Grace Wong-Sarad (Principal Accounting Officer) sold 4,079 shares at $2.50 ($10K), marked as a 10b5-1 plan trade. Holdings down 3% to 118,903 shares. | SEC filing Filed Feb 26, 2026 |
| Dec 5, 2025 | Planned (10b5-1) | Grace Wong-Sarad (Principal Accounting Officer) sold 4,753 shares at $1.21 ($6K), marked as a 10b5-1 plan trade. Holdings down 4% to 122,982 shares. | SEC filing Filed Dec 8, 2025 |
| Dec 3, 2025 | Sale | Neil Lindsay Berkley (CFO) sold 37,261 shares at about $1.12 ($42K). Holdings down 9% to 374,309 shares. Not marked as a 10b5-1 plan trade. | SEC filing Filed Dec 3, 2025 |
| Dec 3, 2025 | Sale | Grace Wong-Sarad (Principal Accounting Officer) sold 8,056 shares at about $1.12 ($9K). Holdings down 6% to 127,735 shares. Not marked as a 10b5-1 plan trade. | SEC filing Filed Dec 3, 2025 |
| Dec 3, 2025 | Sale | Sara Kenkare-Mitra (President / COO) sold 41,687 shares at about $1.12 ($47K). Holdings down 8% to 501,652 shares. Not marked as a 10b5-1 plan trade. | SEC filing Filed Dec 3, 2025 |
| Dec 3, 2025 | Sale | Arnon Rosenthal (CEO and Director) sold 104,347 shares at about $1.12 ($117K). Holdings down 4% to 2,420,040 shares. Not marked as a 10b5-1 plan trade. | SEC filing Filed Dec 3, 2025 |
18 routine transactions (such as grants, option exercises or tax withholding) are not listed.
Cluster buys
No cluster buys in the last 12 months.
Red flags
No red flags in the last 12 months.
Key events
No key events in the last 12 months.
8-K filings, last 12 months
No 8-K filings in the last 12 months.
Red flags are objective triggers only: the item or form filed, never an opinion.
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