[8-K] Energy Vault Holdings, Inc. Reports Material Event

Rhea-AI Filing Summary

Energy Vault Holdings (NRGV) reported it has completed the acquisition of a 150 MW/300 MWh battery energy storage project in Madison County, Texas. The update was disclosed under Item 8.01 in a Form 8-K on October 23, 2025, with a supporting press release furnished as Exhibit 99.1.

The filing emphasizes transaction completion and the project’s scale in megawatts and megawatt-hours, indicating a large-scale storage asset addition in Texas. Additional commercial terms and integration details are referenced to the accompanying press release.

Insights

Energy infrastructure analyst

NRGV closed a 150 MW/300 MWh Texas storage project acquisition.

Energy Vault disclosed completion of an acquisition for a 150 MW/300 MWh battery energy storage project in Madison County, Texas on October 23, 2025. The size indicates utility-scale storage designed to deliver significant power (MW) and energy duration (MWh).

The filing confirms closing and references a press release (Exhibit 99.1) for further information. Without financial terms in this excerpt, the direct balance-sheet or earnings effects are not detailed here.

Subsequent disclosures may outline commercial arrangements and operational timelines tied to this asset. The project’s impact will ultimately depend on deployment, interconnection, and market participation as described in future materials.

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UNITED STATES

SECURITIES AND EXCHANGE COMMISSION

Washington, D.C. 20549

FORM 8-K

CURRENT REPORT

Pursuant to Section 13 or 15(d) of the

Securities Exchange Act of 1934

Date of Report (Date of earliest event reported): October 23, 2025

Energy Vault Holdings, Inc.

(Exact name of registrant as specified in its charter)

Delaware

001-39982

85-3230987

(State or other jurisdiction of incorporation)

(Commission File Number)

(IRS Employer Identification No.)

4165 East Thousand Oaks Blvd., Suite 100 Westlake Village, California						91362
(Address of principal executive offices)						(Zip Code)

Registrant’s telephone number, including area code: (805) 852-0000

Check the appropriate box below if the Form 8-K filing is intended to simultaneously satisfy the filing obligation of the registrant under any of the following provisions (see General Instruction A.2. below):

☐    Written communications pursuant to Rule 425 under the Securities Act (17 CFR 230.425)

☐    Soliciting material pursuant to Rule 14a-12 under the Exchange Act (17 CFR 240.14a-12)

☐    Pre-commencement communications pursuant to Rule 14d-2(b) under the Exchange Act (17 CFR 240.14d-2(b))

☐    Pre-commencement communications pursuant to Rule 13e-4(c) under the Exchange Act (17 CFR 240.13e-4(c))

Securities registered pursuant to Section 12(b) of the Act:

Title of each class

Trading symbol

Name of each exchange on which registered

Common Stock, par value $0.0001 per share

NRGV

New York Stock Exchange

Indicate by check mark whether the registrant is an emerging growth company as defined in Rule 405 of the Securities Act of 1933 (17 CFR §230.405) or Rule 12b-2 of the Securities Exchange Act of 1934 (17 CFR §240.12b-2).

Emerging growth company  ☒

If an emerging growth company, indicate by check mark if the registrant has elected not to use the extended transition period for complying with any new or revised financial accounting standards provided pursuant to Section 13(a) of the Exchange Act.  ☐

Item 8.01 Other Events.

On October 23, 2025, Energy Vault Holdings, Inc. (the “Company”) issued a press release announcing that the Company completed the acquisition of 150 MW/300 MWh battery energy storage project located in Madison County, Texas. A copy of the press release is filed as Exhibit 99.1 hereto.

Item 9.01 Financial Statements and Exhibits.

(d) Exhibits:

Exhibit No.						Description
99.1						Press Release dated as of October 23, 2025
104						Cover page from this Current Report on Form 8-K, formatted in Inline XBRL

SIGNATURES

Pursuant to the requirements of the Securities Exchange Act of 1934, the registrant has duly caused this report to be signed on its behalf by the undersigned hereunto duly authorized.

						ENERGY VAULT HOLDINGS, INC.
Date: October 23, 2025			By:			/s/ Michael Beer
						Name: Michael Beer
						Chief Financial Officer

FAQ

What did NRGV announce in this Form 8-K?

Energy Vault Holdings announced completion of an acquisition of a 150 MW/300 MWh battery energy storage project in Madison County, Texas.

When did NRGV complete the acquisition?

The company reported the completion on October 23, 2025.

Where is the acquired project located?

The project is located in Madison County, Texas.

What is the size of the battery energy storage project NRGV acquired?

The project is sized at 150 MW/300 MWh.

Which exhibit contains more details about the transaction?

Additional details are in Exhibit 99.1, the press release dated October 23, 2025.

What is the stock exchange and ticker for Energy Vault Holdings?

Energy Vault Holdings’ common stock trades on the NYSE under ticker NRGV.