San Martin Javier Officer Stock Option Grant

Javier San Martin, Chief Medical Officer of LeonaBio, Inc. (LONA), was granted 350,000 stock options on April 9, 2026. The options have an exercise price of $9.54 and an expiration date of April 8, 2036. The options are subject to a 48-month vesting period, with monthly vesting contingent on continued service as a Provider. The shares are scheduled to vest monthly over 48 months, starting on the monthly anniversaries of the grant date, provided the optionee remains a Service Provider. This filing is an update to Form 4, reporting the acquisition of securities.