X0609 4 2026-11-02 0 0001844417 Estrella Immunopharma, Inc. ESLA 0002163153 Pussinen Cynthia false 5858 HORTON ST, SUITE 370 EMERYVILLE CA 94608 1 1 0 0 Chief Executive Officer 0 Stock Option (Right to Buy) 0.43 2026-11-02 4 A 0 1000000 0 A 2036-11-02 Common Stock 1000000 1000000 D The option vests and becomes exercisable as to 25% of the underlying shares on October 25, 2027 and as to the remaining 75% in 36 substantially equal monthly installments thereafter, subject to the reporting person's continued service with the Issuer through each vesting date. The option was granted under the Issuer's 2023 Omnibus Incentive Plan and was approved in advance by the Compensation Committee of the Board of Directors and the Board of Directors in accordance with Rule 16b-3(d). Cynthia Pussinen 2026-11-04