Creation of a Direct Financial Obligation or an Obligation under an Off-Balance Sheet Arrangement of a Registrant. The information contained in

Entry into a Material Definitive Agreement. On August 14, 2026, EV Gen Set 1, LLC, a Delaware limited liability company (the “Borrower”) and EV Gen Set I HoldCo, LLC, a Delaware limited liability company (“Holdings”), each a subsidiary of Energy Vault Holdings, Inc. (the “Company”), entered into a credit agreement (the “Credit Agreement”) with CSC Delaware Trust Company, as administrative agent and collateral agent, and each of the lenders party thereto. The Credit Agreement provides for a se…

Results of Operations and Financial Condition. On August 11, 2026, Energy Vault Holdings, Inc. (the “Company”) issued a press release announcing its financial results for the quarter ended June 30, 2026. A copy of the press release is furnished herewith as Exhibit 99.1 and is incorporated herein by reference. The press release contains forward-looking statements regarding the Company, and includes cautionary statements identifying important factors that could cause actual results to differ ma…

Chief Financial Officer — Nitin Dahiya: The company appointed a new Chief Financial Officer from an external source.

Creation of a Direct Financial Obligation or an Obligation under an Off-Balance Sheet Arrangement of a Registrant. The information contained in

to this Current Report on Form 8-K for additional information), on June 29, 2026, the Company and the Investor entered into the first amendment to the Purchase Agreement (the “First Amendment”), pursuant to which the Company agreed to issue and sell an additional $38.0 million of senior secured convertible debentures to the Investor at a purchase price equal to 95% of such additional principal amount. In connection with the foregoing, the Company amended and restated the Tranche 1 AR Converti…

Entry into a Material Definitive Agreement. Amendment to AR Convertible Debentures Securities Purchase Agreement As previously disclosed, on May 18, 2026, Energy Vault Holdings, Inc. (the “Company”) entered into a Securities Purchase Agreement (the “Purchase Agreement”) with YA II PN, Ltd. (the “Investor”), pursuant to which the Company agreed to issue and sell senior secured convertible debentures in multiple tranches with an aggregate principal amount of up to $75.0 million and an initial t…

Unregistered Sales of Equity Securities. The disclosure set forth above in

Results of Operations and Financial Condition. On May 5, 2026, Energy Vault Holdings, Inc. (the “Company”) issued a press release announcing its financial results for the quarter ended March 31, 2026. A copy of the press release is furnished herewith as Exhibit 99.1 and is incorporated herein by reference. The press release contains forward-looking statements regarding the Company, and includes cautionary statements identifying important factors that could cause actual results to differ mater…

Results of Operations and Financial Condition. On March 17, 2026, Energy Vault Holdings, Inc. (the “Company”) issued a press release announcing its financial results for the quarter and year ended December 31, 2025. A copy of the press release is furnished herewith as Exhibit 99.1 and is incorporated herein by reference. The press release contains forward-looking statements regarding the Company, and includes cautionary statements identifying important factors that could cause actual results…

of the Company’s Current Report on Form 8-K filed on February 18, 2026, which information is incorporated herein by reference, and the indenture and form of note which are filed as exhibits to that Form 8-K are incorporated herein by reference.

Creation of a Direct Financial Obligation or an Obligation under an Off-Balance Sheet Arrangement of a Registrant As previously disclosed on February 18, 2026 on a Current Report on Form 8-K filed with the Securities and Exchange Commission, on February 17, 2026, Energy Vault Holdings, Inc. (the “Company”) issued and sold $140.0 million aggregate principal amount of its 5.250% Convertible Senior Notes due 2031 (the “Initial Notes”) in a transaction exempt from the registration requirements of…

Unregistered Sales of Equity Securities The information under

Entry into a Material Definitive Agreement. Indenture and Notes On February 17, 2026, Energy Vault Holdings, Inc. (the “Company”) completed its previously announced private offering (the “Offering”) of $140.0 million aggregate principal amount of 5.250% Convertible Senior Notes due 2031 (the “Notes”). The Notes were issued pursuant to an indenture, dated February 17, 2026 (the “Indenture”), between the Company and U.S. Bank Trust Company, National Association, as trustee. The Notes are genera…

Unregistered Sales of Equity Securities The information under

Creation of a Direct Financial Obligation or an Obligation under an Off-Balance Sheet Arrangement of a Registrant The information under

Other Events. On February 11, 2026, Energy Vault Holdings, Inc. (the “Company”) issued a press release announcing that it has priced its private offering (the “Offering”) of $140.0 million aggregate principal amount of convertible senior notes due 2031 (the “Notes”), which Offering is exempt from the registration requirements of the Securities Act of 1933, as amended (the “Securities Act”). The Offering was upsized from the previously announced offering of $125,000,000 aggregate principal amo…

Entry into a Material Definitive Agreement. As previously disclosed, on September 22, 2025, Energy Vault Holdings, Inc. (the “Company”) entered into a Securities Purchase Agreement (the “Purchase Agreement”) with YA II PN, Ltd. (the “Investor”), pursuant to which the Company agreed to issue and sell up to $50.0 million in aggregate principal amount of senior unsecured convertible debentures in multiple tranches. The initial closing was on September 22, 2025, where the Company issued Debenture…

Other Events. On February 11, 2026, the Company announced that it intends to offer, subject to market conditions and other factors, $125.0 million aggregate principal amount of convertible senior notes due 2031 (the “Notes”) in a private placement to persons reasonably believed to be qualified institutional buyers pursuant to Rule 144A under the Securities Act and its intention to enter into capped call transactions in connection therewith. A copy of the press release is furnished as Exhibit…

of this Form 8-K (including Exhibit 99.1) shall not be deemed “filed” for purposes of Section 18 of the Securities Exchange Act of 1934, as amended (the “Exchange Act”), or otherwise subject to the liabilities of that section, nor shall it be deemed incorporated by reference in any filing under the Securities Act of 1933, as amended, or the Exchange Act, except as expressly set forth by specific reference in such a filing.

Results of Operations and Financial Condition. On January 5, 2026, Energy Vault Holdings, Inc. (the “Company”) issued a press release that, among other things, provided an update regarding the Company’s cash and liquidity, including that cash and liquidity increased by approximately 65% during the fourth quarter of 2025 to over $100 million (above the high end of the Company’s guidance range).

Creation of a Direct Financial Obligation or an Obligation under an Off-Balance Sheet Arrangement of a Registrant. The information contained in

Unregistered Sales of Equity Securities. The disclosure set forth above in

Entry into a Material Definitive Agreement. As previously disclosed, on September 22, 2025 , Energy Vault Holdings, Inc. (the “Company”) entered into a Securities Purchase Agreement (the “Purchase Agreement”) with YA II PN, Ltd. (the “Investor”), pursuant to which the Company agreed to issue and sell up to $50.0 million in aggregate principal amount of senior unsecured convertible debentures (the “Debentures”) in multiple tranches. The initial closing was on September 22, 2025, where the Comp…

Creation of a Direct Financial Obligation or an Obligation under an Off-Balance Sheet Arrangement of a Registrant. As previously disclosed, on September 22, 2025 , Energy Vault Holdings, Inc. (the “Company”) entered into a Securities Purchase Agreement (the “Purchase Agreement”) with YA II PN, Ltd. (the “Investor”), pursuant to which the Company agreed to issue and sell up to $50.0 million in aggregate principal amount of senior unsecured convertible debentures (the “Debentures”) in multiple…