144 0001825486 XXXXXXXX LIVE 0001759631 Hyliion Holdings Corp 001-38823 1202 BMC Drive Suite 100 Cedar Park TX 78613 8334954466 Thomas Healy Officer Common Stock UBS Financial Services Inc

1000 Harbor Blvd 3rd Floor Weehawken NJ 07086

30000 125000 178300000 05/19/2026 NYSE Common Stock 05/19/2026 Employee Benefit Hyliion Holdings Corp N 30000 05/19/2026 cash N Thomas Healy

1202 BMC Drive Suite 100 Cedar Park TX 78613

Common 03/03/2026 58202 119314 05/19/2026 /s/JOSEPH CASSIDY, for UBS Financial Services Inc, as attorney-in-fact for Thomas Healy