X0306 4 2021-09-24 true 0001280784 Hercules Capital, Inc. HTGC 0001653448 Grace Melanie C/O HERCULES CAPITAL INC. 400 HAMILTON AVENUE SUITE 310 PALO ALTO CA 94301 false true false false General Counsel & CCO /s/ /Melanie Grace 2021-09-27