Energy Vault Holdings, Inc. (NYSE: NRGV) director Mary Beth Mandanas acquired 5,000 shares of the company’s common stock in a single transaction on March 25, 2026, according to a Form 4 filed with the Securities and Exchange Commission. The purchase price was $3.65 per share, bringing the total transaction value to $18,250.
The $3.65 per-share price was marginally higher than the referenced current trading price of $3.62. Energy Vault is reported to carry a market capitalization of $637 million. After the transaction, Mandanas directly holds 350,838 shares of the company.
The insider purchase comes against a backdrop of substantial share-price movement. The stock has returned 343% over the past 12 months while trading down 20% year-to-date, reflecting notable volatility in the company’s equity.
On the fundamentals side, InvestingPro analysis noted that Energy Vault remains unprofitable, with an earnings per share of -$0.65 over the last twelve months.
Recent company results provide additional context for the insider buy. Energy Vault reported fourth-quarter 2025 earnings that beat expectations, posting an EPS of $0.02 compared with the consensus estimate of -$0.0033, a positive surprise quantified at 706.06%. The company also reported revenue of $153.3 million, above the expected $137.73 million by 11.3%.
In a strategic operational move, Energy Vault announced the acquisition of the McMurtre Battery Energy Storage System, a 175 MW project located near Dallas, Texas. The company indicated this project forms part of its broader plan to deploy 1,500 MW of battery energy storage capacity. Energy Vault intends to contribute the McMurtre project to its Asset Vault investment platform once the project reaches Ready-to-Build status.
Mandanas’s purchase was disclosed in a standard SEC filing and increases her direct ownership stake. The transaction and the company’s recent financial and project developments were the principal facts disclosed in the filing and in company reports.
Given the available information, market participants can observe an insider purchase concurrent with an operational acquisition and a quarterly results beat, while the company continues to report negative trailing twelve-month EPS.