X0407 4 2023-06-07 0 0001888012 HilleVax, Inc. HLVX 0001365617 Heron Patrick J C/O HILLEVAX, INC., 75 STATE STREET, SUITE 100 - #9995 BOSTON MA 02109 1 0 1 0 0 Stock Option 17.94 2023-06-07 4 A 0 22500 0.00 A 2033-06-06 Common Stock 22500 22500 D The option was granted pursuant to the Registrant's non-employee director compensation program. The option shall vest and/or become exercisable on the first to occur of (i) the first anniversary of the grant date or (ii) the next occurring annual meeting of our stockholders, in each case, subject to the non-employee director continuing in service on our board of directors through such vesting dates. /s/ Paul Bavier, Attorney-in-Fact 2023-06-09