Energy Vault Holdings (NRGV) officer reports 8,751-share RSU tax withholding

Rhea-AI Filing Summary

Energy Vault Holdings, Inc. reported an insider transaction by the President of Energy Vault Labs on a Form 4. On 12/12/2025, the officer had 8,751 shares of common stock withheld by the company at a price of $3.44 per share to cover taxes due upon the vesting of restricted stock units. After this tax withholding, the reporting person directly owns 1,135,768 shares of Energy Vault common stock. This filing reflects a routine equity compensation and tax-settlement event rather than an open-market sale.

SEC Form 4

FORM 4

UNITED STATES SECURITIES AND EXCHANGE COMMISSION
Washington, D.C. 20549

STATEMENT OF CHANGES IN BENEFICIAL OWNERSHIP

Filed pursuant to Section 16(a) of the Securities Exchange Act of 1934
or Section 30(h) of the Investment Company Act of 1940

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Check this box if no longer subject to Section 16. Form 4 or Form 5 obligations may continue. See Instruction 1(b).

Check this box to indicate that a transaction was made pursuant to a contract, instruction or written plan for the purchase or sale of equity securities of the issuer that is intended to satisfy the affirmative defense conditions of Rule 10b5-1(c). See Instruction 10.

1. Name and Address of Reporting Person^*

Wiese Christopher

(Last) (First) (Middle)

4165 EAST THOUSAND OAKS BLVD,

SUITE 100,

(Street)

WESTLAKE VILLAGE CA 91362

(City) (State) (Zip)

2. Issuer Name and Ticker or Trading Symbol
Energy Vault Holdings, Inc. [ NRGV ]

5. Relationship of Reporting Person(s) to Issuer
(Check all applicable)

	Director		10% Owner
X	Officer (give title below)		Other (specify below)
	President, Energy Vault Labs

3. Date of Earliest Transaction (Month/Day/Year)
12/12/2025

4. If Amendment, Date of Original Filed (Month/Day/Year)

6. Individual or Joint/Group Filing (Check Applicable Line)

X	Form filed by One Reporting Person
	Form filed by More than One Reporting Person

Table I - Non-Derivative Securities Acquired, Disposed of, or Beneficially Owned
1. Title of Security (Instr. 3)	2. Transaction Date (Month/Day/Year)	2A. Deemed Execution Date, if any (Month/Day/Year)	3. Transaction Code (Instr. 8)		4. Securities Acquired (A) or Disposed Of (D) (Instr. 3, 4 and 5)			5. Amount of Securities Beneficially Owned Following Reported Transaction(s) (Instr. 3 and 4)	6. Ownership Form: Direct (D) or Indirect (I) (Instr. 4)	7. Nature of Indirect Beneficial Ownership (Instr. 4)
			Code	V	Amount	(A) or (D)	Price
Common Stock	12/12/2025		F(1)		8,751	D	$3.44	1,135,768	D

Table II - Derivative Securities Acquired, Disposed of, or Beneficially Owned (e.g., puts, calls, warrants, options, convertible securities)
1. Title of Derivative Security (Instr. 3)	2. Conversion or Exercise Price of Derivative Security	3. Transaction Date (Month/Day/Year)	3A. Deemed Execution Date, if any (Month/Day/Year)	4. Transaction Code (Instr. 8)		5. Number of Derivative Securities Acquired (A) or Disposed of (D) (Instr. 3, 4 and 5)		6. Date Exercisable and Expiration Date (Month/Day/Year)		7. Title and Amount of Securities Underlying Derivative Security (Instr. 3 and 4)		8. Price of Derivative Security (Instr. 5)	9. Number of derivative Securities Beneficially Owned Following Reported Transaction(s) (Instr. 4)	10. Ownership Form: Direct (D) or Indirect (I) (Instr. 4)	11. Nature of Indirect Beneficial Ownership (Instr. 4)
				Code	V	(A)	(D)	Date Exercisable	Expiration Date	Title	Amount or Number of Shares

Explanation of Responses:

1. Represents shares withheld by the Issuer to satisfy the reporting person's tax liability on vesting of restricted stock units.

Remarks:

	/s/ Brad Eastman, Chief Legal Officer	12/12/2025
	** Signature of Reporting Person	Date
Reminder: Report on a separate line for each class of securities beneficially owned directly or indirectly.
* If the form is filed by more than one reporting person, see Instruction 4 (b)(v).
** Intentional misstatements or omissions of facts constitute Federal Criminal Violations See 18 U.S.C. 1001 and 15 U.S.C. 78ff(a).
Note: File three copies of this Form, one of which must be manually signed. If space is insufficient, see Instruction 6 for procedure.
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FAQ

What insider transaction did Energy Vault Holdings (NRGV) report in this Form 4?

The Form 4 reports that an officer of Energy Vault Holdings, Inc., the President of Energy Vault Labs, had 8,751 shares of common stock withheld by the company to satisfy tax obligations arising from the vesting of restricted stock units.

Was the Energy Vault (NRGV) Form 4 transaction an open-market sale?

No. The filing explains that the 8,751 shares were withheld by the issuer to cover the reporting person’s tax liability on vesting of restricted stock units, rather than being sold in the open market.

What price per share was used for the Energy Vault (NRGV) tax withholding?

The shares withheld to cover taxes were valued at $3.44 per share, as disclosed in the Form 4 under the non-derivative securities transaction details.

How many Energy Vault (NRGV) shares does the insider own after this transaction?

Following the reported tax-withholding transaction, the reporting person directly owns 1,135,768 shares of Energy Vault Holdings common stock, as stated in the Form 4.

What was the transaction date for the Energy Vault (NRGV) insider activity?

The earliest transaction date disclosed in the Form 4 is 12/12/2025, which is when the tax-withholding event related to restricted stock unit vesting occurred.

Who is the reporting person’s role at Energy Vault Holdings (NRGV)?

The reporting person is identified as an Officer of Energy Vault Holdings, serving as President, Energy Vault Labs, and filed the Form 4 as a single reporting person.