Energy Vault CEO shares withheld for tax

Energy Vault Holdings, Inc. director and Chief Executive Officer Robert Piconi reported a routine tax-related share withholding.

Rhea-AI Filing Summary

Energy Vault Holdings, Inc. director and Chief Executive Officer Robert Piconi reported a routine tax-related share withholding. The company withheld 141,682 shares of common stock at $4.71 per share to cover his tax liability upon vesting of restricted stock units, which is explicitly described as not a market sale. After this tax-withholding disposition, Piconi directly holds 16,449,991 common shares.

Insider Trade Summary

Exercise Price or Tax Liability: 141,682 shares

Exercise Price or Tax Liability 1 txn

Insider Piconi Robert

Role Chief Executive Officer

Type	Security	Shares	Price	Value
Exercise Price or Tax Liability	Common Stock	141,682	$4.71	$667K

Holdings After Transaction: Common Stock — 16,449,991 shares (Direct)

Footnotes (1)

1. F1. Represents shares withheld by the Issuer to satisfy the reporting person's tax liability on vesting of restricted stock units. Not a market sale.

Key Figures

Shares withheld for tax: 141,682 shares Withholding price per share: $4.71 per share Shares held after transaction: 16,449,991 shares +1 more

4 metrics

Shares withheld for tax 141,682 shares Withheld to satisfy tax liability on RSU vesting

Withholding price per share $4.71 per share Value used for tax-withholding disposition calculation

Shares held after transaction 16,449,991 shares Direct Energy Vault common stock holdings after withholding

Tax-withholding transactions 1 transaction Count of F-code tax-withholding entries in this Form 4

Key Terms

restricted stock units, tax-withholding disposition, beneficial ownership

3 terms

restricted stock units financial

"tax liability on vesting of restricted stock units. Not a market sale."

Restricted stock units are a type of company reward where employees are promised shares of stock, but they only fully own these shares after meeting certain conditions, like staying with the company for a set time. They matter because they can become valuable assets and are often used to motivate employees to help the company succeed.

tax-withholding disposition financial

"transaction_action: tax-withholding disposition for payment of tax liability"

A tax-withholding disposition is an event or transaction—such as selling or transferring securities, exercising options, or receiving compensation—that triggers a requirement to hold back part of the payment and remit it to tax authorities. It matters to investors because it reduces the cash they receive immediately and can change the timing and amount of taxable income, like a cashier taking a portion of your sale proceeds to pay taxes before you get the rest.

beneficial ownership financial

"tax-withholding shares are reported as part of the reporting person's beneficial ownership position"

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.

FAQ

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

What insider transaction did Energy Vault (NRGV) report for Robert Piconi?

Energy Vault reported a tax-withholding disposition for CEO Robert Piconi. The company withheld shares upon RSU vesting to satisfy his tax liability, rather than executing an open-market sale, making this a routine, non-market transaction.

How many Energy Vault (NRGV) shares were withheld for Robert Piconi’s taxes?

A total of 141,682 Energy Vault common shares were withheld to cover Robert Piconi’s tax liability. This occurred in connection with the vesting of restricted stock units, as described in the Form 4 footnote.

Was Robert Piconi’s Energy Vault (NRGV) transaction an open-market sale?

No, the transaction was not an open-market sale. The filing states the shares were withheld by Energy Vault to satisfy Robert Piconi’s tax liability on vesting restricted stock units, and explicitly notes it is not a market sale.

What price per share was used for Robert Piconi’s tax-withholding in Energy Vault (NRGV)?

The tax-withholding disposition used a price of $4.71 per Energy Vault common share. This price is applied solely for the withholding calculation related to the restricted stock unit vesting event.

How many Energy Vault (NRGV) shares does Robert Piconi hold after this Form 4 transaction?

Following the tax-withholding disposition, Robert Piconi directly holds 16,449,991 Energy Vault common shares. This figure reflects his position after 141,682 shares were withheld to satisfy tax obligations on vested RSUs.

What is the nature of the restricted stock unit vesting reported for Energy Vault (NRGV)?

The filing indicates that restricted stock units granted to Robert Piconi vested, triggering a tax liability. To satisfy this liability, Energy Vault withheld 141,682 common shares instead of conducting a market sale, as clarified in the footnote.

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

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Accepted by SEC EDGAR 07/02/2026 - 04:06 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^*

Piconi Robert

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

2a. Foreign Trading Symbol

3. Date of Earliest Transaction (Month/Day/Year)
06/30/2026

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	06/30/2026		F		141,682(1)	D	$4.71	16,449,991	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. Not a market sale.

Remarks:

	/s/ Amy Blakeway, Chief Legal Officer	07/02/2026
	** 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)