 AUSTIN, Texas--BUSINESS WIRE--Hyliion Holdings Corp. NYSE: HYLN Hyliion, a leader in electrified powertrain solutions for Class 8 semi-trucks, announced it is set to join the broad-market Russell 3000 Index at the conclusion of the 2021 Russell indexes annual reconstitution. This is effective after the US market opens on June 28. Annual Russell indexes reconstitution captures the 4,000 largest US stocks as of May 7, ranking them by total market capitalization. Membership in the US all-c 