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

Rhea-AI Filing Summary

Thomas R. Ertel, a director of Energy Vault Holdings, Inc. (NRGV), reported a purchase of common stock on 08/11/2025. The Form 4 shows a single transaction where Mr. Ertel acquired 13,300 shares at a price of $1.4399 per share, recorded with transaction code P (purchase). Following the purchase, his direct beneficial ownership is reported as 188,006 shares. The filing was submitted as a Form 4 by one reporting person and is signed on behalf of the company by Brad Eastman, Chief Legal Officer, on 08/12/2025.

Positive

• Director purchase disclosed: Thomas R. Ertel acquired 13,300 shares on 08/11/2025 at $1.4399 per share.
• Increased direct ownership: Post-transaction direct beneficial ownership reported as 188,006 shares.
• Clean Form 4 filing: Form filed by one reporting person and executed by company CLO on 08/12/2025.

Negative

• None.

Insights

Securities Analyst

TL;DR: Director purchased 13,300 NRGV shares at $1.4399, increasing direct holdings to 188,006.

The filing documents a straightforward director purchase recorded on 08/11/2025 under transaction code P. Key, verifiable facts are the number of shares (13,300), the per-share price ($1.4399) and the post-transaction direct ownership (188,006 shares). The report is filed by one reporting person and executed by the company CLO on 08/12/2025. This Form 4 contains no additional derivatives, dispositions, or linked plans disclosed in the submission.

Corporate Governance Expert

TL;DR: Routine insider purchase disclosed; filing shows direct ownership increase to 188,006 shares.

The document is a standard Section 16 Form 4 reporting an insider purchase by a director. It clearly identifies the reporting person (Thomas R. Ertel), relationship (Director), transaction date (08/11/2025), amount purchased (13,300 shares) and price ($1.4399). The signature line shows the filing was signed by the Chief Legal Officer on 08/12/2025. No amendments, derivative transactions or additional beneficial owners are included in this filing.

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
Estimated average burden
hours per response:			0.5

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^*

Ertel Thomas R

(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		10% Owner
	Officer (give title below)		Other (specify below)

3. Date of Earliest Transaction (Month/Day/Year)
08/11/2025

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	08/11/2025		P(1)		13,300	A	$1.4399	188,006	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. The shares are purchased in one transaction at a price provided in Column 4.

Remarks:

	/s/ Brad Eastman, Chief Legal Officer	08/12/2025
	** 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 did the Form 4 for Energy Vault (NRGV) report?

The Form 4 reports that director Thomas R. Ertel purchased 13,300 common shares on 08/11/2025 at $1.4399 per share.

How many NRGV shares does Thomas R. Ertel own after the transaction?

The filing reports direct beneficial ownership of 188,006 shares following the purchase.

What type of transaction code is listed on the Form 4?

The transaction is listed with code P, which the form indicates as a purchase.

When was the Form 4 signed and who signed it?

The filing shows a signature block dated 08/12/2025 signed by Brad Eastman, Chief Legal Officer.

Was this Form 4 filed by multiple reporting persons?

No. The document indicates the Form was filed by one reporting person.