Energy Vault (NYSE: NRGV) CEO now directly holds 20,188,630 shares

Rhea-AI Filing Summary

Energy Vault Holdings, Inc. insider activity centers on tax withholding. On 12/11/2025, a reporting person who is a director, Chief Executive Officer and 10% owner had 8,612 shares of common stock withheld by the company to cover tax obligations upon vesting of restricted stock units, at a reported price of $3.44 per share (transaction code F).

After this transaction, the reporting person beneficially owned 20,188,630 shares of common stock directly. In addition, 4,307,946 shares are held by the Piconi 2021 Delaware Trust and 4,307,946 shares are held by the Piconi Family 2021 Delaware Trust, in each case with the reporting person serving as investment advisor, which are reported as indirect beneficial ownership.

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

OMB APPROVAL

OMB Number:			3235-0287
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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^*

Piconi Robert

(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)

X	Director	X	10% Owner
X	Officer (give title below)		Other (specify below)
	Chief Executive Officer

3. Date of Earliest Transaction (Month/Day/Year)
12/11/2025

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	12/11/2025		F(1)		8,612	D	$3.44	20,188,630	D
Common Stock								4,307,946	I	See Footnote(2)
Common Stock								4,307,946	I	See Footnote(3)

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.

2. Held by Piconi 2021 Delaware Trust for which the Reporting Person serves as investment advisor.

3. Held by Piconi Family 2021 Delaware Trust for which the Reporting Person serves as investment advisor.

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.
Persons who respond to the collection of information contained in this form are not required to respond unless the form displays a currently valid OMB Number.

FAQ

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

The filing reports that on 12/11/2025 the reporting person had 8,612 shares of Energy Vault common stock withheld by the issuer at $3.44 per share to satisfy tax liabilities upon vesting of restricted stock units, coded as transaction type F.

What is the reporting person’s role and relationship to Energy Vault (NRGV)?

The reporting person is disclosed as a Director, a 10% Owner, and an Officer of Energy Vault Holdings, Inc., serving as the company’s Chief Executive Officer.

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

Following the reported tax-withholding transaction, the reporting person beneficially owns 20,188,630 shares of Energy Vault common stock in direct ownership.

What indirect holdings of Energy Vault (NRGV) stock are reported in the Form 4?

The filing reports 4,307,946 shares of common stock held by the Piconi 2021 Delaware Trust and another 4,307,946 shares held by the Piconi Family 2021 Delaware Trust, with the reporting person serving as investment advisor, reported as indirect beneficial ownership.

What does transaction code F mean in this Energy Vault (NRGV) Form 4?

Transaction code F in the filing is explained as shares withheld by the issuer to satisfy the reporting person’s tax liability upon vesting of restricted stock units.

Does this Energy Vault (NRGV) Form 4 report any derivative securities?

The section for derivative securities is included but contains no reported derivative transactions or holdings in the provided content.