Energy Vault Begins Construction of 150 MW SOSA Energy Center in Texas’ ERCOT Market in Q4 2025, Bringing Total Asset Vault Portfolio Under Operation & Construction to Over 340 MW While Growing Cash in the Quarter by ~65% to Over $100 Million

WESTLAKE VILLAGE, Calif.–(BUSINESS WIRE)—- $NRGV–Energy Vault Holdings, Inc. (NYSE: NRGV) (“Energy Vault”), a leader in sustainable, grid-scale energy storage solutions, today announced the start of construction of the SOSA Energy Center, a 150 MW/300 MWh battery energy storage system (BESS) located in Madison County, Texas. The project, originally developed by Savion, a subsidiary of Shell plc, was formally acquired by Energy Vault in Q4 2025 under its Asset Vault platform, and is expected to achiev