Energy Vault Holdings, Inc. (NYSE: NRGV) ("Energy Vault"), a leader in sustainable, grid-scale energy storage solutions, today announced that they have joined the Russell 2000^® Index following the conclusion of the 2022 Russell indexes annual reconstitution, effective today, Monday, June 27, 2022 at market open.

Annual Russell indexes reconstitution captures the 4,000 largest US stocks as of May 6, ranking them by total market capitalization. Membership in the US all-cap Russell 3000^® Index, which remains in place for one year, means automatic inclusion in the large-cap Russell 1000^® Index or small-cap Russell 2000^® Index as well as the appropriate growth and value style indexes. FTSE Russell determines membership for its Russell indexes primarily by objective, market-capitalization rankings and style attributes.

“We are excited to be added to the Russell family of indices,” said Robert Piconi, Chairman, Co-Founder and CEO of Energy Vault. “Our inclusion in the Russell 2000^® marks another important milestone for Energy Vault during this transformative year for the company, giving us a greater opportunity to increase our exposure to the broader investment community, and expand awareness for our mission of accelerating the decarbonization of our planet.”

Russell indexes are widely used by investment managers and institutional investors for index funds, and as benchmarks for active investment strategies. Approximately $12 trillion in assets are benchmarked against Russell’s US indexes. Russell indexes are part of FTSE Russell, a leading global index provider.

For more information on the Russell 3000^® Index and the Russell indexes reconstitution, go to the “Russell Reconstitution” section on the FTSE Russell website.

About Energy Vault

Energy Vault develops and deploys sustainable energy storage solutions designed to transform the world’s approach to utility-scale energy storage in realizing decarbonization while maintaining grid resiliency. The company’s proprietary gravity-based energy storage technology and energy storage management and integration platform are intended to help utilities, independent power producers and large industrial energy users significantly reduce their levelized cost of energy while maintaining power reliability. Utilizing eco-friendly materials with the ability to integrate waste materials for beneficial re-use, Energy Vault is facilitating the shift to a circular economy while accelerating the clean energy transition for its customers. For additional information, please visit: www.energyvault.com.

About FTSE Russell

FTSE Russell is a global index leader that provides innovative benchmarking, analytics and data solutions for investors worldwide. FTSE Russell calculates thousands of indexes that measure and benchmark markets and asset classes in more than 70 countries, covering 98% of the investable market globally.

FTSE Russell index expertise and products are used extensively by institutional and retail investors globally. Approximately $20 trillion is currently benchmarked to FTSE Russell indexes. For over 30 years, leading asset owners, asset managers, ETF providers and investment banks have chosen FTSE Russell indexes to benchmark their investment performance and create ETFs, structured products and index-based derivatives.

A core set of universal principles guides FTSE Russell index design and management: a transparent rules-based methodology is informed by independent committees of leading market participants. FTSE Russell is focused on applying the highest industry standards in index design and governance and embraces the IOSCO Principles. FTSE Russell is also focused on index innovation and customer partnerships as it seeks to enhance the breadth, depth and reach of its offering.

FTSE Russell is wholly owned by London Stock Exchange Group.

For more information, visit www.ftserussell.com.