Insider Transaction Report for Grace Wong-Sarad

Grace Wong-Sarad, Principal Accounting Officer of Alector, Inc., reported a series of transactions on October 13 and 14, 2026. These transactions primarily involved employee stock options, with several options being repriced to $1.87 per share due to a one-time stock option repricing event. Some options were exercised and new ones were granted, all linked to the underlying Common Stock. Additionally, 55,555 shares of Common Stock were acquired, represented by restricted stock units that vest in installments starting December 1, 2026. The repricing reduced the exercise price of certain options to $1.87, with specific conditions regarding a retention period and potential premium exercise prices.