Exhibit 99.1 Energy Vault Reports Fourth Quarter and Full Year 2023 Financial Results FY 2023 revenue of $341.5 million, up 134% YoY and 18% QoQ, within annual guidance range Increased cash position to $146 million with no debt, above prior guidance of $132 million from Q3 2023 Reduced quarterly cash Operating Expense run rate by 25-30% through actions taken in Q4 2023, enabling a 2024 reduced quarterly cash OpEx of $13-15 million to accelerate shift to cash flow positive exiting 2024 and FY 2025 FY 2023 gr ...

Energy Vault Holdings, Inc. (NYSE:NRGV) Q3 2023 Earnings Call Transcript November 9, 2023 4:30 PM ET Company Participants Laurence Alexander - Chief Marketing Officer Robert Piconi - Chairman & Chief Executive Officer Jan Kees van Gaalen - Chief Financial Officer Conference Call Participants Stephen Gengaro - Stifel Christopher Ellinghaus - Siebert Williams and Shank Thomas Boyes - TD Cowen Noel Parks - Tuohy Brothers Operator Good day, and welcome to the Energy Vault Third Quarter 2023 Earnings Call. [Oper ...

| --- | --- | --- | --- | --- | |-----------------------------------------------------------|-------|-------|-------|-------| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Energy Vault Preeminent Energy Storage Company | | | | | | Investor Presentation \| Third Quarter 2023 | | | | | | © 2023 ENERGY VAULT HOLDINGS INC. - ALL RIGHTS RESERVED | | | | | Forward-Looking Statements Non-GAAP Financial Metrics Market and Industry 3 Trademarks No Solicitation of Sale © 2023 ENERGY VAULT ...

Table of Contents UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 10-Q (Mark One) x QUARTERLY REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 For the quarterly period ended September 30, 2023 OR o TRANSITION REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 For the transition period from _________ to _________ Commission file number 001-39982 ___________________________________ ENERGY VAULT HOLDINGS, INC. ________________ ...

Table of Contents UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 10-Q (Mark One) x QUARTERLY REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 For the quarterly period ended June 30, 2023 OR o TRANSITION REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 For the transition period from _________ to _________ Commission file number 001-39982 ___________________________________ ___________________________________ (Exact name o ...

Energy Vault Holdings, Inc. (NYSE:NRGV) Q2 2023 Earnings Call Transcript August 8, 2023 8:30 AM ET Company Participants Laurence Alexander - Chief Marketing Officer Robert Piconi - Chairman & Chief Executive Officer Jan Kees van Gaalen - Chief Financial Officer Conference Call Participants Joseph Osha - Guggenheim Securities Thomas Boyes - TD Cowen Brian Dobson - Chardan Capital Markets Noel Parks - Tuohy Brothers Operator Good morning, and welcome to the Energy Vault Second Quarter 2023 Earnings Call. At t ...

ENERGY VAULT l Preeminent Energy Storage Company © 2023 ENERGY VAULT HOLDINGS INC. - ALL RIGHTS RESERVED Forward-Looking Statements Non-GAAP Financial Metrics Market and Industry Data Our registered or common law trademarks, tradenames and service marks appearing in this presentation are our property. Solely for convenience, our trademarks, tradenames and service marks referred to in this presentation may appear without the ®, TM and SM symbols, but those references are not intended to This presentation doe ...

Energy Vault Holdings, Inc. (NYSE:NRGV) Q1 2023 Earnings Conference Call May 9, 2023 4:30 PM ET Company Participants Laurence Alexander - Chief Marketing Officer Robert Piconi - Chairman & Chief Executive Officer Jan Kees van Gaalen - Chief Financial Officer Conference Call Participants Hilary Cauley - Guggenheim Securities Christopher Ellinghaus - Siebert Williams Shank & Co. Greg Pendy - Chardan Thomas Boyes - TD Cowen Noel Parks - Tuohy Brothers Operator Greetings and welcome to Energy Vault First Quart ...

Table of Contents UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 10-Q (Mark One) x QUARTERLY REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 For the quarterly period ended March 31, 2023 OR o TRANSITION REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 For the transition period from _________ to _________ Commission file number 001-39982 ___________________________________ ENERGY VAULT HOLDINGS, INC. ____________________ ...

Table of Contents UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 10-K (Mark One) x ANNUAL REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 For the fiscal year ended December 31, 2022 OR o TRANSITION REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 For the transition period from _________ to _________ Commission file number 001-39982 ___________________________________ ENERGY VAULT HOLDINGS, INC. _________________________ ...