Energy Vault director receives 19,153 RSU award

Hixon Dylan reported acquisition or exercise transactions in this Form 4 filing.

Rhea-AI Filing Summary

Hixon Dylan reported acquisition or exercise transactions in this Form 4 filing.

Energy Vault Holdings director Dylan Hixon reported an equity award and updated share holdings. He received 19,153 restricted stock units, each representing a contingent right to one share of Common Stock, vesting on June 1, 2027 subject to his continued service on the Board.

After this award, Hixon holds 117,602 shares of Common Stock directly. A further 900,065 shares are held indirectly through Arden Road Investments LLC via a trust where he serves as sole trustee; he may be deemed to have beneficial ownership only to the extent of his pecuniary interest.

Insider Trade Summary

Grant/Award: 19,153 shares

Grant/Award 2 txns

Insider Hixon Dylan

Role Director

Type	Security	Shares	Price	Value
Grant/Award	Common Stock	19,153	$0.00	$0.00
holding	Common Stock	--	--	--

Holdings After Transaction: Common Stock — 117,602 shares (Direct); Common Stock — 900,065 shares (Indirect, Held by Arden Road Investments LLC)

Footnotes (2)

1. F1. Reflects an award of restricted stock units (RSUs). Each RSU represents a contingent right to receive one share of Common Stock. The RSUs vest (subject to the reporting person's continued service on the Board) on June 1, 2027.
2. F2. Mr. Hixon is the sole trustee of the "Dylan Trust under the JMH-ICH Lex Trust" which holds shares in Arden Road Investments LLC. Mr. Hixon may be deemed to have beneficial ownership of the securities held by the Dylan Trust. Mr. Hixon disclaims beneficial ownership of such securities except to the extent of his pecuniary interest therein.

Key Figures

RSU grant size: 19,153 units Direct shares after grant: 117,602 shares Indirect shares via LLC: 900,065 shares +1 more

4 metrics

RSU grant size 19,153 units Restricted stock units awarded on May 29, 2026

Direct shares after grant 117,602 shares Common Stock held directly following transaction

Indirect shares via LLC 900,065 shares Common Stock held indirectly by Arden Road Investments LLC

RSU vesting date June 1, 2027 Vesting contingent on continued Board service

Key Terms

restricted stock units (RSUs), beneficial ownership, pecuniary interest, indirect ownership

4 terms

restricted stock units (RSUs) financial

"Reflects an award of restricted stock units (RSUs). Each RSU represents a contingent right to receive one share of Common Stock."

Restricted stock units (RSUs) are a type of company promise to give employees shares of stock in the future, usually after certain conditions like working for a set time. They are like a gift promised today that you receive later, which can become valuable if the company's stock price goes up. RSUs matter because they are a way companies reward employees and can be a significant part of compensation.

beneficial ownership financial

"Mr. Hixon may be deemed to have beneficial ownership of the securities held by the Dylan Trust."

Beneficial ownership means the person or entity that actually enjoys the benefits of owning shares or other assets — such as receiving dividends, voting rights, or price gains — even if the legal title is held in another name. For investors it matters because knowing who truly controls and profits from a company reveals who can influence decisions, exposes potential conflicts of interest or hidden concentration of power, and affects transparency and risk in the stock.

pecuniary interest financial

"Mr. Hixon disclaims beneficial ownership of such securities except to the extent of his pecuniary interest therein."

indirect ownership financial

"Held by Arden Road Investments LLC"

FAQ

AI-generated questions and answers. How Rhea-AI works. Not financial advice.

What insider transaction did NRGV director Dylan Hixon report?

Dylan Hixon reported an award of 19,153 restricted stock units in Energy Vault Holdings. Each unit represents a contingent right to one share of Common Stock, vesting in 2027, and reflects equity-based compensation tied to his continued Board service.

How many NRGV shares does Dylan Hixon hold directly after this filing?

Following the reported grant, Dylan Hixon holds 117,602 shares of Energy Vault Holdings Common Stock directly. This figure reflects his post-transaction direct ownership and does not include any indirect holdings through entities or trusts associated with him.

When do Dylan Hixon’s newly awarded NRGV RSUs vest?

The 19,153 restricted stock units awarded to Dylan Hixon vest on June 1, 2027. Vesting is contingent on his continued service on the Energy Vault Holdings Board, meaning he must remain a director through that date to receive the underlying shares.

What does Dylan Hixon’s indirect ownership in NRGV involve?

Indirect ownership relates to 900,065 shares held by Arden Road Investments LLC, in which a trust associated with Hixon holds shares. As sole trustee, he may be deemed to have beneficial ownership, but he disclaims it except for his pecuniary interest in those securities.

Are Dylan Hixon’s NRGV RSUs an immediate stock purchase?

No, the RSUs are not an immediate stock purchase; they represent a contingent right to receive shares later. Hixon receives actual Common Stock only if the units vest on June 1, 2027, while he continues serving on the Energy Vault Holdings Board.

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

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Accepted by SEC EDGAR 06/01/2026 - 04:42 PM Learn about SEC filing dates

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^*

Hixon Dylan

(Last) (First) (Middle)

4165 EAST THOUSAND OAKS BLVD, SUITE 100

(Street)

WESTLAKE VILLAGE CALIFORNIA 91362

(City) (State) (Zip)

UNITED STATES

(Country)

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)

2a. Foreign Trading Symbol

3. Date of Earliest Transaction (Month/Day/Year)
05/29/2026

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

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

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

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	05/29/2026		A		19,153(1)	A	$0	117,602	D
Common Stock								900,065	I	Held by Arden Road Investments LLC(2)

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. Reflects an award of restricted stock units (RSUs). Each RSU represents a contingent right to receive one share of Common Stock. The RSUs vest (subject to the reporting person's continued service on the Board) on June 1, 2027.

2. Mr. Hixon is the sole trustee of the "Dylan Trust under the JMH-ICH Lex Trust" which holds shares in Arden Road Investments LLC. Mr. Hixon may be deemed to have beneficial ownership of the securities held by the Dylan Trust. Mr. Hixon disclaims beneficial ownership of such securities except to the extent of his pecuniary interest therein.

Remarks:

	/s/ Amy Blakeway, Chief Legal Officer	06/01/2026
	** 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.
* Form 4: SEC 1474 (03-26)