Kaplan Fox & Kilsheimer LLP announced a securities class action against Hyliion Holdings Corp. on behalf of investors who purchased or otherwise acquired its securities between May 12 and June 23, 2026. Robbins LLP previously announced a related investor notice covering the same class period. The complaints allege Hyliion made misleading statements about a May 12 letter of intent with VFG Holdings LLC to provide power modules for data-center applications, including claims that the arrangement lacked substance and was promoted to drive the stock higher and facilitate insider trading. Hyliion shares rose from $2.68 on May 12 to $4.67 on May 15. After Pelican Way Research questioned the agreement on June 23, the stock fell $1.27, or 17.2%, that day and another $1.18, or 19.3%, on June 24, closing at $4.92. Investors may seek appointment as lead plaintiff by October 27, 2026, but need not do so to share in any potential recovery.