SAN DIEGO--(BUSINESS WIRE)---- $HYLN #Energy--Shareholder rights law firm Robbins LLP is investigating Hyliion Holdings Corp. (AMEX: HYLN) to determine whether certain Hyliion Holdings officers and directors violated securities laws and breached fiduciary duties to shareholders. Hyliion is a power generator company whose primary product is the KARNQ Power Module.Why Are We Investigating Hyliion Holdings?Hyliion stock dropped 16% on Tuesday, June 23, 2026, following the release of a short-seller report from ...