X0407 4 2023-06-13 0 0001828673 HCW Biologics Inc. HCWB 0001231174 GARRETT SCOTT T C/O HCW BIOLOGICS INC 2929 N. COMMERCE PARKWAY MIRAMAR FL 33025 1 0 0 0 0 Stock Option (Right to Buy) 2.01 2023-06-13 4 A 0 12500 0.00 A 2033-06-12 Common Stock 12500 12500 D 100% of the total number of shares subject to the Option shall vest and become exercisable on the earlier of (a) June 13, 2024 or (b) the next annual meeting of stockholders, subject to the Reporting Person continuing to provide services through the vesting date. /s/ Nicole Valdivieso, as Attorney-in-Fact for Scott T. Garrett 2023-06-14