Form 4 Filing for Alector, Inc. - Officer Stock Sale

Neil Lindsay, CFO and Chief Business Officer of Alector, Inc., reported the sale of 19,360 shares of Common Stock on June 2, 2026. The sale was conducted under a non-derivative transaction with transaction code "S". The shares were sold at a weighted average price of $1.9742, with individual transactions ranging from $1.92 to $2.08 per share. This sale was to cover tax obligations related to the vesting of restricted stock units. Following the transaction, Mr. Lindsay owns 379,900 shares of Alector, Inc. common stock.