Joshua Mook plan to sell securities of Hyliion Holdings Corp. under Form 144

Joshua Mook filed Form 144 to notify SEC of plan to sell 15000 units of Hyliion Holdings Corp. securities around 2026-05-19, with aggregate market value of $61,000.00. The total outstanding units is 178300000.0. The amount planned to be sold represents 0.01% of total outstanding units; Recent transactions in past 3 months include: On 03/03/2026, sold 14816 units for $30225.00;