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Form 8-K

sec.gov

8-K — Energy Vault Holdings, Inc.

Accession: 0001104659-26-057301

Filed: 2026-05-07

Period: 2026-05-07

CIK: 0001828536

SIC: 3690 (MISCELLANEOUS ELECTRICAL MACHINERY, EQUIPMENT & SUPPLIES)

Item: Regulation FD Disclosure

Item: Financial Statements and Exhibits

Documents

8-K — tm2613991d1_8k.htm (Primary)

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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):

May 7, 2026

Energy

Vault Holdings, Inc.

(Exact name of registrant as specified in its charter)

Delaware

001-39982

85-3230987

(State or other jurisdiction of

incorporation or organization)

(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)

(805) 852-0000

Registrant’s telephone number, including area code

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

Title of each class

Trading Symbol(s)

Name of each exchange

on which registered

Common stock, par value $0.0001 per share

NRGV

New York Stock Exchange

Check the appropriate box below if the Form 8-K filing is intended

to simultaneously satisfy the filing obligations of the registrant under any of the following provisions:

¨ 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))

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 x

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 7.01 - Regulation FD Disclosure.

The

Company posted on its website at https://www.energyvault.com/ an investor presentation dated May 7, 2026, containing supplemental

financial and operational information regarding the Company.

The information in this Item 7.01 of this Current

Report on Form 8-K shall not be deemed “filed” for purposes of Section 18 of the Exchange Act or otherwise subject to the

liabilities of that Section, and shall not be or be deemed to be incorporated by reference in any filing under the Securities Act, or

the Exchange Act, regardless of any general incorporation language in such filing.

Item 9.01 Financial Statements and Exhibits.

(d) Exhibits.

Exhibit

Number

Description

104

Cover Page Interactive Data File (embedded within the Inline XBRL document)

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: May 7, 2026

By:

/s/ Amy Blakeway

Name: Amy Blakeway

Title: Chief Legal Officer

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Entity File Number

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Entity Registrant Name

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Vault Holdings, Inc.

Entity Central Index Key

0001828536

Entity Tax Identification Number

85-3230987

Entity Incorporation, State or Country Code

DE

Entity Address, Address Line One

4165 East Thousand Oaks Blvd.

Entity Address, Address Line Two

Suite

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Entity Address, City or Town

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Entity Address, State or Province

CA

Entity Address, Postal Zip Code

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City Area Code

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Local Phone Number

852-0000

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