Reported relationships
Latest disclosed role at each company.
| Company | Last reported as | Report date | Published |
|---|---|---|---|
| Energy Vault Holdings, Inc.NRGV · Entity 5363 | Director | May 29, 2026 | June 01, 2026 |
Disclosed balances
About these balances
Latest available filing per company, not a reconstructed current portfolio. Matching sequences show the last reported balance with all source rows expandable; grouping alone does not establish account ownership. Do not add unresolved positions together. Filings may omit unchanged positions, and amendments may correct only part of an older disclosure. Jointly reported shares are not necessarily this owner's personal holdings.
Energy Vault Holdings, Inc.
Report date May 29, 2026 · Filed June 01, 2026
| Security / award | Ownership account | Disclosed shares / units | Disclosure context |
|---|---|---|---|
| Common StockSEC Table I · non-derivative | Direct | 372,864 |
Reported balance
After 2026-05-29 transaction · row 1
1 source rowRow 1 · 2026-05-29 · Grant · Acquired 22,026 · Balance 372,864 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. |
Filing footnotes · ownership attribution and instrument terms
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.
Past disclosures · reporting ended (1)
No longer tracked through insider filings. These historical balances do not imply present ownership or a zero position.
TortoiseEcofin Acquisition Corp. III
Report date July 16, 2023 · Filed July 18, 2023
Section 16 reporting ended · disclosed 2023-07-18. Current position is not established by this disclosure.
| Security / award | Ownership account | Disclosed shares / units | Disclosure context |
|---|---|---|---|
| Class B Ordinary SharesSEC Table II · derivative / convertible security | Direct | 0 |
Reported balance
After 2023-07-16 transaction · row 1
Instrument identity requires review; Table II rows are not merged.
1 source rowRow 1 · 2023-07-16 · Other · Disposed 40,000 · Balance 0 F1: The Class B Ordinary Shares are automatically convertible into the Issuer's Class A Ordinary Shares at the time of the Issuer's initial business combination on a one-for-one basis, subject to adjustment pursuant to certain anti-dilution rights, and have no expiration date. The Class B Ordinary Shares are subject to forfeiture under certain circumstances relating to Ms. Mandanas' service on the Issuer's Board of Directors. F2: In connection with Ms. Mandanas' resignation from the Issuer's Board of Directors, 40,000 Class B Ordinary Shares were forfeited to the Issuer by Ms. Mandanas. |
Filing footnotes · ownership attribution and instrument terms
F1: The Class B Ordinary Shares are automatically convertible into the Issuer's Class A Ordinary Shares at the time of the Issuer's initial business combination on a one-for-one basis, subject to adjustment pursuant to certain anti-dilution rights, and have no expiration date. The Class B Ordinary Shares are subject to forfeiture under certain circumstances relating to Ms. Mandanas' service on the Issuer's Board of Directors.
F2: In connection with Ms. Mandanas' resignation from the Issuer's Board of Directors, 40,000 Class B Ordinary Shares were forfeited to the Issuer by Ms. Mandanas.
Transaction history
JSON APIPurchases/sales include open-market and private transactions. Plan disclosure applies to the filing; individual rows may differ. “Not disclosed” is not “unplanned.”
The cutoff filters transaction history only. Company summaries and owner relationships show the latest available disclosures. Parser corrections can improve historical records.
| Transaction date | Company | Activity / security | Shares / units | Reported price | Reported value | Details |
|---|---|---|---|---|---|---|
| May 29, 2026 Filed Jun 1, 2026 20:42 UTC | Energy Vault Holdings, Inc. NRGV · Entity 5363 | GrantCommon Stock | 22,026 | $0.00 | $0.00 |
DisclosureSEC source: 0001828536-26-000076 · wk-form4_1780346570.xml · nonDerivative · entry 1 Mandanas Mary Beth · CIK 0001857599 · Director 10b5-1 filing: No plan indicated Ownership: Direct Disclosed balance after: 372,864 F1 · shares: 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. Read SEC document |
| March 25, 2026 Filed Mar 26, 2026 17:07 UTC | Energy Vault Holdings, Inc. NRGV · Entity 5363 | PurchaseCommon Stock | 5,000 | $3.65 | $18,250.00 |
DisclosureSEC source: 0001857599-26-000002 · wk-form4_1774544850.xml · nonDerivative · entry 1 Mandanas Mary Beth · CIK 0001857599 · Director 10b5-1 filing: No plan indicated Ownership: Direct Disclosed balance after: 350,838 F1 · price: The shares are purchased in one transaction at a price given in Column 4. Read SEC document |
| September 16, 2025 Filed Sep 18, 2025 20:23 UTC | Energy Vault Holdings, Inc. NRGV · Entity 5363 | GrantCommon Stock | 161,132 | $0.00 | $0.00 |
DisclosureSEC source: 0001857599-25-000004 · wk-form4_1758227026.xml · nonDerivative · entry 1 Mandanas Mary Beth · CIK 0001857599 · Director 10b5-1 filing: No plan indicated Ownership: Direct Disclosed balance after: 345,838 F1 · shares: 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) after the first anniversary of the Vesting Commencement Date - May 30, 2025. Read SEC document |
| September 11, 2025 Filed Sep 12, 2025 16:22 UTC | Energy Vault Holdings, Inc. NRGV · Entity 5363 | PurchaseCommon Stock | 10,000 | $2.05 | $20,520.00 |
DisclosureSEC source: 0001828536-25-000153 · wk-form4_1757694142.xml · nonDerivative · entry 1 Mandanas Mary Beth · CIK 0001857599 · Director 10b5-1 filing: No plan indicated Ownership: Direct Disclosed balance after: 184,706 F1 · acquired: The shares are purchased in one transaction at a price given in Column 4. Read SEC document |
| May 24, 2024 Filed May 29, 2024 20:22 UTC | Energy Vault Holdings, Inc. NRGV · Entity 5363 | GrantCommon Stock | 79,337 | $0.00 | $0.00 |
DisclosureSEC source: 0001828536-24-000115 · wk-form4_1717014153.xml · nonDerivative · entry 1 Mandanas Mary Beth · CIK 0001857599 · Director 10b5-1 filing: No plan indicated Ownership: Direct Disclosed balance after: 174,706 F1 · shares: Reflects an award of restricted stock units ("RSUs"), which represent a contingent right to receive one share of Common Stock for each RSU. The RSUs vest (subject to the Reporting Person's continued service to the Board) on the earlier of (i) the date of the next Annual Meeting occurring after the date of grant or (ii) May 24, 2025. Read SEC document |
| July 16, 2023 Filed Jul 18, 2023 18:38 UTC | TortoiseEcofin Acquisition Corp. III TRTL · Entity 109785 | OtherClass B Ordinary Shares · Derivative | 40,000 | $0.00 | $0.00 |
DisclosureSEC source: 0001213900-23-057956 · ownership.xml · derivative · entry 1 Mandanas Mary Beth · CIK 0001857599 · Director 10b5-1 filing: No plan indicated Ownership: Direct Disclosed balance after: 0 Underlying: Class A Ordinary Shares · 40,000 shares Expires not disclosed F1 · derivative.exercise_price: The Class B Ordinary Shares are automatically convertible into the Issuer's Class A Ordinary Shares at the time of the Issuer's initial business combination on a one-for-one basis, subject to adjustment pursuant to certain anti-dilution rights, and have no expiration date. The Class B Ordinary Shares are subject to forfeiture under certain circumstances relating to Ms. Mandanas' service on the Issuer's Board of Directors. F2 · kind: In connection with Ms. Mandanas' resignation from the Issuer's Board of Directors, 40,000 Class B Ordinary Shares were forfeited to the Issuer by Ms. Mandanas. F1 · derivative.exercise_date: The Class B Ordinary Shares are automatically convertible into the Issuer's Class A Ordinary Shares at the time of the Issuer's initial business combination on a one-for-one basis, subject to adjustment pursuant to certain anti-dilution rights, and have no expiration date. The Class B Ordinary Shares are subject to forfeiture under certain circumstances relating to Ms. Mandanas' service on the Issuer's Board of Directors. F1 · derivative.expiration_date: The Class B Ordinary Shares are automatically convertible into the Issuer's Class A Ordinary Shares at the time of the Issuer's initial business combination on a one-for-one basis, subject to adjustment pursuant to certain anti-dilution rights, and have no expiration date. The Class B Ordinary Shares are subject to forfeiture under certain circumstances relating to Ms. Mandanas' service on the Issuer's Board of Directors. Read SEC document |
| May 25, 2023 Filed May 30, 2023 21:04 UTC | Energy Vault Holdings, Inc. NRGV · Entity 5363 | GrantCommon Stock | 48,853 | $0.00 | $0.00 |
DisclosureSEC source: 0001828536-23-000090 · wf-form4_168548062610262.xml · nonDerivative · entry 1 Mandanas Mary Beth · CIK 0001857599 · Director 10b5-1 filing: No plan indicated Ownership: Direct Disclosed balance after: 95,369 F1 · shares: Reflects an award of restricted stock units ("RSUs"), which represent a contingent right to receive one share of Common Stock for each RSU. The RSUs vest (subject to the Reporting Person's continued service to the Board) on the earlier of (i) the date of the next Annual Meeting occurring after the date of grant or (ii) May 25, 2024. Read SEC document |
| December 16, 2022 Filed Feb 11, 2023 00:28 UTC | Energy Vault Holdings, Inc. NRGV · Entity 5363 | GrantCommon Stock | 46,516 | $0.00 | $0.00 |
DisclosureSEC source: 0001104659-23-018742 · tm236389-4_4seq1.xml · nonDerivative · entry 1 Mandanas Mary Beth · CIK 0001857599 · Director 10b5-1 filing: Not disclosed Ownership: Direct Disclosed balance after: 46,516 F1 · shares: Reflects an award of restricted stock units ("RSUs"), which represent a contingent right to receive one share of Common Stock for each RSU. The RSUs vest (subject to the Reporting Person's continued service to the Company or its subsidiaries through the applicable vesting date) in three equal annual installments, such that the RSUs will be fully vested on October 31, 2025. Read SEC document |
| July 19, 2021 Filed Jul 21, 2021 16:18 UTC | TortoiseEcofin Acquisition Corp. III TRTL · Entity 109785 | OtherClass B Ordinary Shares · Derivative | 40,000 | $0.00 | $0.00 |
DisclosureSEC source: 0001213900-21-037916 · ownership.xml · derivative · entry 1 Mandanas Mary Beth · CIK 0001857599 · Director 10b5-1 filing: Not disclosed Ownership: Direct Disclosed balance after: 40,000 Underlying: Class A Ordinary Shares · 40,000 shares Expires not disclosed F1 · derivative.exercise_price: The Class B Ordinary Shares are automatically convertible into the Issuer's Class A Ordinary Shares at the time of the Issuer's initial business combination on a one-for-one basis, subject to adjustment pursuant to certain anti-dilution rights, and have no expiration date. The Class B Ordinary Shares are subject to forfeiture under certain circumstances relating to Ms. Mandanas' service on the Issuer's Board of Directors. F2 · kind: In connection with the Issuer's initial public offering and Ms. Mandanas' appointment to the Issuer's Board of Directors, the Issuer issued 40,000 Class B Ordinary Shares to Ms. Mandanas F1 · derivative.exercise_date: The Class B Ordinary Shares are automatically convertible into the Issuer's Class A Ordinary Shares at the time of the Issuer's initial business combination on a one-for-one basis, subject to adjustment pursuant to certain anti-dilution rights, and have no expiration date. The Class B Ordinary Shares are subject to forfeiture under certain circumstances relating to Ms. Mandanas' service on the Issuer's Board of Directors. F1 · derivative.expiration_date: The Class B Ordinary Shares are automatically convertible into the Issuer's Class A Ordinary Shares at the time of the Issuer's initial business combination on a one-for-one basis, subject to adjustment pursuant to certain anti-dilution rights, and have no expiration date. The Class B Ordinary Shares are subject to forfeiture under certain circumstances relating to Ms. Mandanas' service on the Issuer's Board of Directors. Read SEC document |
Value uses the disclosed total when available, otherwise shares × reported transaction price. It is not an estimate of exercise cash cost or investment performance.