Form 4: Energy Vault CEO Boosts Stake with 17,500 Share Purchase

Energy Vault Holdings CEO Robert Piconi acquired 17,500 shares of common stock at a weighted average price of $3.0214, signaling increased insider confidence.

Summary

• Robert Piconi, the Chief Executive Officer, Director, and 10% owner of Energy Vault Holdings, Inc. (NRGV), purchased additional shares of the company's common stock.
• The transaction took place on September 19, 2025.
• Piconi acquired 17,500 shares of common stock.
• The shares were purchased at a weighted average price of $3.0214 per share, with individual transaction prices ranging from $2.9925 to $3.04.
• Following this acquisition, Robert Piconi directly beneficially owns 20,199,884 shares of common stock.
• He also indirectly beneficially owns 4,307,946 shares through the Piconi 2021 Delaware Trust and another 4,307,946 shares through the Piconi Family 2021 Delaware Trust, for both of which he serves as investment advisor.
• The transaction was executed pursuant to a Rule 10b5-1(c) contract, instruction, or written plan.

Sentiment

Score: 8

Explanation: The CEO's purchase of additional shares, especially as a 10% owner, indicates strong confidence in the company's valuation and future prospects, generally viewed positively by the market.

Positives

• CEO Robert Piconi, who is also a Director and 10% owner, increased his direct beneficial ownership in Energy Vault Holdings, Inc. by purchasing 17,500 shares.
• The purchase of shares by a key executive and significant owner signals confidence in the company's current valuation and future prospects.
• The transaction was made under a Rule 10b5-1(c) plan, indicating a pre-arranged and systematic approach to share acquisition.

Future Outlook

The filing does not provide any forward-looking statements or guidance.

Industry Context

This filing reports an individual insider transaction and does not provide broader industry context.

Corporate Governance

Related Party Transactions

• Indirect beneficial ownership of 4,307,946 shares held by Piconi 2021 Delaware Trust, for which Robert Piconi serves as investment advisor.
• Indirect beneficial ownership of 4,307,946 shares held by Piconi Family 2021 Delaware Trust, for which Robert Piconi serves as investment advisor.

Stakeholder Impact

• Shareholders may view the CEO's increased stake as a positive signal, potentially boosting investor confidence in the company's future performance.

Key Dates

Recommendation

The Chief Executive Officer and 10% owner, Robert Piconi, increasing his direct stake in the company by purchasing 17,500 shares at market price signals strong confidence in Energy Vault Holdings' future performance and valuation. This insider buying activity, especially from a high-level executive, often precedes positive developments or indicates a belief that the stock is undervalued, making it an attractive signal for potential investors.

Keywords

Energy Vault Holdings, NRGV, Robert Piconi, Insider Trading, Stock Purchase, CEO, Director, 10b5-1 Plan, Common Stock