InsiderTrades

Form 4 for ALEC Alector, Inc.

Accepted 2025-09-04 00:00:00 ET · period of report 2025-09-02 · accession 0001415889-25-023670 · 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
2025-09-04 2025-09-02 ALEC Rosenthal Arnon CEO, Dir S - Sale $2.50 -51.6K 2.35M -2% -$128.9K

Purchase Sale Sale after option exercise All abbreviations

Every reported transaction

#TableSecurityDateCodeA/DSharesPriceOwned afterOwnExercise / expiryUnderlyingFootnotes
1 Common Common Stock 2025-09-02 S D 51,562 $2.50 2,350,220 D — — (F2) The price reported in Column 4 is a weighted average price. The shares were sold in multiple transactions at prices ranging from $2.30 to $2.59. 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. (F3) The reported amount excludes 150,000 shares previously reported as performance share units, or PSUs. Because the performance metrics were not attained during the PSU measurement period, these PSUs were forfeited on May 6, 2025.