Energy Vault holder plans $426,984.67 share sale

Energy Vault Holdings, Inc. (NRGV) is the issuer for a planned resale of its common stock under Rule 144.

Rhea-AI Filing Summary

Energy Vault Holdings, Inc. (NRGV) is the issuer for a planned resale of its common stock under Rule 144. A person named Stephanie Unwin, with Fidelity Brokerage Services LLC as broker, has noticed the potential sale of 115,000 shares, with an aggregate market value of $426,984.67, out of 181,839,570 shares outstanding. The shares relate to restricted stock vesting on May 31, 2026 and are proposed for sale on the NYSE.

Key Figures

Shares to be sold: 115,000 shares of common stock Aggregate market value: $426,984.67 Shares outstanding: 181,839,570 shares +2 more

5 metrics

Shares to be sold 115,000 shares of common stock Proposed Rule 144 sale for the account of Stephanie Unwin

Aggregate market value $426,984.67 Value of 115,000 common shares covered by the notice

Shares outstanding 181,839,570 shares Common shares outstanding for Energy Vault Holdings, Inc.

Restricted stock vesting date May 31, 2026 Vesting date for restricted stock underlying the securities to be sold

Proposed sale exchange NYSE Exchange listed for the sale of the common stock

Key Terms

Rule 144, Restricted Stock Vesting, aggregate market value, attorney-in-fact

4 terms

Rule 144 regulatory

"See the definition of "person" in paragraph (a) of Rule 144."

Rule 144 is a U.S. securities regulation that sets conditions under which restricted or insider-held shares can be legally resold to the public, such as required holding periods, availability of public information, limits on how much can be sold at once, and certain filing requirements. For investors it matters because it determines when previously locked-up shares can enter the market — like a release valve that can increase supply, affect share price, and signal insider intent.

Restricted Stock Vesting financial

"Common | 05/31/2026 | Restricted Stock Vesting | Issuer"

Restricted stock vesting is the timetable and conditions under which shares granted to employees or insiders become fully owned and can be sold, typically requiring continued work or meeting performance goals. It matters to investors because large blocks of shares can become tradable at once, which can change share supply and price, and because vesting aligns insiders’ incentives with the company’s long‑term performance—think of it like a timed unlock that both rewards and locks in key people.

aggregate market value financial

"Common ... 115000 | 426984.67 | 181839570"

Aggregate market value is the combined price you would pay to buy all outstanding shares of a company or all companies in a group at current market prices — essentially the sum of each stock’s market capitalization. It matters to investors because it shows the overall size and weight of an investment or sector (like the total cost to buy every piece of a puzzle), helps compare scale across companies or markets, and influences index composition and risk exposure.

attorney-in-fact regulatory

"as a duly authorized representative ... as attorney-in-fact for Stephanie Unwin"

An attorney-in-fact is the person or entity given legal authority through a power of attorney to act on behalf of another for specific tasks, such as signing documents, voting shares, or handling transactions. For investors, this matters because it lets a trusted representative make timely decisions or complete paperwork when the owner cannot, much like handing keys to someone to run errands on your behalf—so checks on scope and limits of that authority are important.

FAQ

AI-generated questions and answers. How Rhea-AI works. Not financial advice.

What does the Form 144 filing for NRGV disclose?

It discloses a planned Rule 144 resale of 115,000 shares of Energy Vault Holdings, Inc. common stock by a person named Stephanie Unwin, with Fidelity Brokerage Services LLC as broker, relating to restricted stock vesting on May 31, 2026.

How many NRGV shares are proposed to be sold under this Form 144?

The notice covers a proposed sale of 115,000 shares of Energy Vault Holdings, Inc. common stock, to be sold through Fidelity Brokerage Services LLC on the NYSE.

What is the aggregate market value of the NRGV shares in this Form 144?

The filing lists an aggregate market value of $426,984.67 for the 115,000 shares of Energy Vault Holdings, Inc. common stock covered by the planned Rule 144 sale.

How many NRGV shares are outstanding according to this Form 144?

The Form 144 indicates that there are 181,839,570 shares of Energy Vault Holdings, Inc. common stock outstanding, as a reference figure alongside the proposed Rule 144 sale.

When do the NRGV restricted shares related to this Form 144 vest?

The securities to be sold are tied to Restricted Stock Vesting with a vesting date of May 31, 2026, as stated in the Form 144 securities-to-be-sold section.

Who is acting for the seller in the NRGV Form 144 filing?

The Form 144 is signed by Adam Gehring as a duly authorized representative of Fidelity Brokerage Services LLC, acting as attorney-in-fact for Stephanie Unwin, the person for whose account the securities are to be sold.

AI-generated analysis. How Rhea-AI works. Not financial advice.

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Available on EDGAR 08/26/2026 - 04:13 PM EDT Accepted by SEC EDGAR 08/26/2026 - 04:12 PM EDT Learn about SEC filing dates

Form 144 Filer Information	UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 Form 144 NOTICE OF PROPOSED SALE OF SECURITIES PURSUANT TO RULE 144 UNDER THE SECURITIES ACT OF 1933
FORM 144

144: Filer Information

Filer CIK	0002014396
Filer CCC	XXXXXXXX
Is this a LIVE or TEST Filing?	LIVE TEST
Submission Contact Information
Name
Phone
E-Mail Address

144: Issuer Information

Name of Issuer	Energy Vault Holdings, Inc.
SEC File Number	001-39982
Address of Issuer	4165 EAST THOUSAND OAKS BLVD. SUITE 100 WESTLAKE VILLIAGE CALIFORNIA 91362
Phone	805-852-0000
Name of Person for Whose Account the Securities are To Be Sold	Unwin Stephanie
See the definition of "person" in paragraph (a) of Rule 144. Information is to be given not only as to the person for whose account the securities are to be sold but also as to all other persons included in that definition. In addition, information shall be given as to sales by all persons whose sales are required by paragraph (e) of Rule 144 to be aggregated with sales for the account of the person filing this notice.
Relationship to Issuer	Director

144: Securities Information

Title of the Class of Securities To Be Sold	Name and Address of the Broker	Number of Shares or Other Units To Be Sold	Aggregate Market Value	Number of Shares or Other Units Outstanding	Approximate Date of Sale	Name the Securities Exchange
Common	Fidelity Brokerage Services LLC 900 Salem Street Smithfield RI 02917	115000	426984.67	181839570	08/26/2026	NYSE

Furnish the following information with respect to the acquisition of the securities to be sold and with respect to the payment of all or any part of the purchase price or other consideration therefor:

144: Securities To Be Sold

Title of the Class	Date you Acquired	Nature of Acquisition Transaction	Name of Person from Whom Acquired	Is this a Gift?	Date Donor Acquired	Amount of Securities Acquired	Date of Payment	Nature of Payment *
Common	05/31/2026	Restricted Stock Vesting	Issuer			115000	05/31/2026	Compensation

* If the securities were purchased and full payment therefor was not made in cash at the time of purchase, explain in the table or in a note thereto the nature of the consideration given. If the consideration consisted of any note or other obligation, or if payment was made in installments describe the arrangement and state when the note or other obligation was discharged in full or the last installment paid.

Furnish the following information as to all securities of the issuer sold during the past 3 months by the person for whose account the securities are to be sold.

144: Securities Sold During The Past 3 Months

Nothing to Report

144: Remarks and Signature

Remarks
Date of Notice	08/26/2026
ATTENTION:
The person for whose account the securities to which this notice relates are to be sold hereby represents by signing this notice that he does not know any material adverse information in regard to the current and prospective operations of the Issuer of the securities to be sold which has not been publicly disclosed. If such person has adopted a written trading plan or given trading instructions to satisfy Rule 10b5-1 under the Exchange Act, by signing the form and indicating the date that the plan was adopted or the instruction given, that person makes such representation as of the plan adoption or instruction date.
Signature	/s/ Adam Gehring, as a duly authorized representative of Fidelity Brokerage Services LLC, as attorney-in-fact for Stephanie Unwin
ATTENTION: Intentional misstatements or omission of facts constitute Federal Criminal Violations (See 18 U.S.C. 1001)