InsiderTrades

Form 4 for ALEC Alector, Inc.

Accepted 2026-03-03 00:00:00 ET · period of report 2026-03-02 · accession 0001757770-26-000002 · SEC index · Original document

Summary rows

Aggregated the way they appear in lists: one row per insider, transaction code and security table.

X Filed Traded Ticker Insider Title Type Price Qty Owned ΔOwn Value
2026-03-03 2026-03-02 ALEC Rosenthal Arnon CEO, Dir S - Sale $2.12 -81.9K 2.34M -3% -$173.6K

Purchase Sale Sale after option exercise All abbreviations

Every reported transaction

#TableSecurityDateCodeA/DSharesPriceOwned afterOwnExercise / expiryUnderlyingFootnotes
1 Common Common Stock 2026-03-02 S D 81,864 $2.12 2,338,176 D — — (F2) The price reported in Column 4 is a weighted average price. The shares were sold in multiple transactions at prices ranging from $2.04 to $2.37. 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.