Energy Vault expands with 1 GWh Australian storage acquisition

Rhea-AI Filing Summary

Energy Vault Holdings, Inc. (NRGV) filed an 8-K to report the closing of its acquisition of the 125 MW / 1,000 MWh Stoney Creek battery-energy-storage system (BESS) in Australia. Disclosed under Item 8.01, the event is deemed material and is supported by a press release (Ex. 99.1). No purchase price, financing details, or projected financial impact were included in the filing.

The transaction enlarges Energy Vault’s global storage portfolio and marks the company’s first utility-scale asset in Australia, a rapidly growing BESS market. Common stock continues to trade on the NYSE under ticker NRGV. No other material changes—such as earnings revisions, debt issuances, or leadership transitions—were reported.

Positive

• Expands portfolio: Adds 125 MW/1,000 MWh utility-scale BESS, enhancing revenue diversification and geographic reach.
• First Australian asset: Provides foothold in a fast-growing storage market with favorable price volatility.

Negative

• Key financial metrics missing: Filing provides no purchase price, funding source, or expected ROI, creating valuation uncertainty.
• Execution risk: Integration, grid connection and regulatory factors in Australia not disclosed.

Insights

Equity Research Analyst

TL;DR: Transformative international asset adds scale; financial terms absent, limiting valuation precision.

The 125 MW/1,000 MWh Stoney Creek BESS roughly doubles Energy Vault’s operational storage capacity, accelerating its transition from technology provider to asset owner. Australia’s high renewables penetration and supportive market rules can deliver attractive capacity and arbitrage revenues, suggesting a potentially accretive move. Yet the 8-K omits capex, funding mix, IRR targets, or closing adjustments, making earnings accretion/timing impossible to model. Given the strategic importance of entering a new geography with a utility-scale footprint, I classify the disclosure as positive but moderately uncertain.

Renewable-Energy Project Specialist

TL;DR: Adds 1 GWh storage in a high-value market; integration and cost unknown.

At 8 hour duration, Stoney Creek is designed for long-duration dispatch—ideal for Australia’s volatile spot prices. The acquisition strengthens Energy Vault’s competitive positioning versus Fluence and Powin. Risks stem from grid connection, EPC cost inflation and potential changes to Australia’s Capacity Investment Scheme. Absent EPC status or forward contracts, execution risk remains. Still, the deal signals confidence in multi-hour gravity-to-battery hybrid strategy, warranting a positive impact assessment.

8-K Event Classification

2 items: 8.01, 9.01

2 items

Item 8.01 Other Events Other

Voluntary disclosure of events the company deems important to shareholders but not covered by other items.

Item 9.01 Financial Statements and Exhibits Exhibits

Financial statements, pro forma financial information, and exhibit attachments filed with this report.

Understanding 8-K Material Events →

0001828536FALSE00018285362025-08-072025-08-07

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): August 7, 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 August 7, 2025, Energy Vault Holdings, Inc. (the “Company”) issued a press release announcing that the Company completed the acquisition of 125 MW/1,000 MWh Stoney Creek BESS in Australia. 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 August 7, 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: August 8, 2025			By:			/s/ Michael Beer
						Name: Michael Beer
						Chief Financial Officer

FAQ

What did Energy Vault (NRGV) announce in its August 7 2025 8-K?

The company closed the acquisition of the 125 MW/1,000 MWh Stoney Creek battery-energy-storage project in Australia.

Does the 8-K state how much Energy Vault paid for Stoney Creek?

No. The filing does not disclose purchase price, financing terms, or projected returns.

Is this Energy Vault’s first asset in Australia?

Yes. Stoney Creek represents Energy Vault’s initial utility-scale presence in the Australian storage market.

Will the acquisition affect NRGV’s earnings guidance?

The 8-K provides no updated guidance or earnings impact details.

Where can investors find more information about the transaction?

The accompanying press release (Exhibit 99.1) contains additional context not included in the 8-K body.