Energy Vault ex-officer plans 50K-share sale

Former officer Michael Thomas Beer files a Rule 144 notice to sell 50,000 NRGV common shares, following a prior 65,000-share sale.

Rhea-AI Filing Summary

Energy Vault Holdings, Inc. (NRGV) has a notice of proposed sale of securities under Rule 144 filed on behalf of former officer Michael Thomas Beer. The notice covers a planned sale of 50,000 shares of common stock to be sold through Fidelity Brokerage Services LLC on the NYSE. These shares were acquired from the issuer as restricted stock vesting on January 21, 2026 as compensation. The filing also reports that Beer sold 65,000 shares of common stock during the prior three months for $265,200 in gross proceeds.

Key Figures

Shares proposed for sale: 50,000 shares of common stock Aggregate market value of proposed sale: $189,477.16 Shares sold in prior 3 months: 65,000 shares +3 more

6 metrics

Shares proposed for sale 50,000 shares of common stock Planned Rule 144 sale by former officer Michael Thomas Beer

Aggregate market value of proposed sale $189,477.16 Value listed for the 50,000 shares to be sold

Shares sold in prior 3 months 65,000 shares Shares of NRGV common stock sold on July 6, 2026

Proceeds from prior sale $265,200 Gross proceeds from the 65,000-share sale on July 6, 2026

Shares outstanding 181,839,570 shares Energy Vault Holdings, Inc. common stock outstanding as stated in the notice

Acquisition date of shares to be sold January 21, 2026 Date of restricted stock vesting for the 50,000 shares

Key Terms

Rule 144, restricted stock vesting, attorney-in-fact

3 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 | 01/21/2026 | 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.

attorney-in-fact regulatory

"as attorney-in-fact for Michael Beer"

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

What insider sale is being proposed for Energy Vault Holdings (NRGV) in this Form 144?

The notice covers a proposed sale by former officer Michael Thomas Beer of 50,000 shares of Energy Vault Holdings, Inc. common stock, to be sold through Fidelity Brokerage Services LLC on the NYSE under Rule 144.

How did the former officer acquire the 50,000 NRGV shares covered by this Form 144?

The 50,000 shares of NRGV common stock were acquired on January 21, 2026 through restricted stock vesting from the issuer, Energy Vault Holdings, Inc., as compensation.

What prior sales by Michael Beer in NRGV stock are disclosed in this Form 144?

The filing reports that Michael Beer sold 65,000 shares of NRGV common stock on July 6, 2026, for $265,200 in gross proceeds during the past three months.

What valuation information is provided for the planned NRGV share sale?

For the proposed 50,000-share sale, the Form 144 lists an aggregate market value of $189,477.16 and states that Energy Vault Holdings, Inc. had 181,839,570 shares of common stock outstanding.

Who is executing the proposed NRGV sale and who signed the Form 144?

The proposed sale will be executed through Fidelity Brokerage Services LLC. The notice is signed “/s/ Daniel Tucci, as a duly authorized representative of Fidelity Brokerage Services LLC, as attorney-in-fact for Michael Beer.”

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

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Available on EDGAR 09/04/2026 - 11:51 AM Accepted by SEC EDGAR 09/04/2026 - 11:51 AM 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	0001870889
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	Beer Michael Thomas
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	Former Officer

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	50000	189477.16	181839570	09/04/2026	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	01/21/2026	Restricted Stock Vesting	Issuer			50000	01/21/2026	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

Name and Address of Seller	Title of Securities Sold	Date of Sale	Amount of Securities Sold	Gross Proceeds
Michael Beer 4165 East Thousand Oaks Blvd. Suite 100 Westlake Village OH 91362	Common	07/06/2026	65000	265200.00

144: Remarks and Signature

Remarks
Date of Notice	09/04/2026
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/ Daniel Tucci, as a duly authorized representative of Fidelity Brokerage Services LLC, as attorney-in-fact for Michael Beer
ATTENTION: Intentional misstatements or omission of facts constitute Federal Criminal Violations (See 18 U.S.C. 1001)