[Form 4] Energy Vault Holdings, Inc. Insider Trading Activity

Rhea-AI Filing Summary

Energy Vault Holdings (NRGV) disclosed a routine insider transaction on Form 4. On 10/10/2025, the reporting person had 13,719 common shares withheld under code F at $2.97 per share to cover taxes from restricted stock unit vesting.

After this transaction, the filing lists 20,199,884 shares beneficially owned directly. It also reports indirect holdings through two Delaware trusts for which the reporting person serves as investment advisor: the Piconi 2021 Delaware Trust and the Piconi Family 2021 Delaware Trust.

The reporting person is identified as a Director, 10% Owner, and Officer (Chief Executive Officer). This filing reflects tax‑related share withholding rather than an open‑market purchase or 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).

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)
10/10/2025

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	10/10/2025		F		13,719(1)	D	$2.97	20,199,884	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	10/14/2025
	** 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 did NRGV disclose in this Form 4?

A tax-related share withholding of 13,719 common shares at $2.97 per share tied to RSU vesting.

What is the transaction code and its meaning?

Code F indicates shares were withheld to satisfy taxes upon vesting of equity awards.

What are the reporting person’s direct holdings after the transaction?

The filing shows 20,199,884 shares beneficially owned directly after the reported transaction.

Are there indirect holdings reported for NRGV?

Yes. Indirect holdings are reported via the Piconi 2021 Delaware Trust and the Piconi Family 2021 Delaware Trust.

What roles does the reporting person hold at Energy Vault (NRGV)?

The reporting person is a Director, 10% Owner, and Chief Executive Officer.

Was this an open-market buy or sell?

No. It reflects tax withholding upon RSU vesting, not an open-market trade.