Thomas R Ertel bought $20k of NRGV
director at Energy Vault Holdings, Inc.. 11,200 shares at an average of $1.81, traded Aug 28, 2025, filed Aug 28, 2025.
Score components
- +15RoleDirector
- 0Trade size$20k at market
- +3Relative to holdingsHoldings up 6%
- +4Price context25% below the 52-week high
- +15Cluster7 insiders buying within 14 days
- +5Repeat buying2 buys in 90 days
- 0Track recordToo few past buys to judge (0 with prices)
What happened after comparable buys
Same side and tier, against the S&P 500, at 1, 3 and 6 months. Shown to Pro users; the whole table is on the backtest page.
This signal so far: 1m +59.5%, 3m +75.3%, 6m +78.9%.
Price around the trade, and since
From a quarter before the trade to today. The arrow is the trade, the circle the day the filing reached EDGAR, which is the first day anyone outside could act; the dotted line is the S&P 500 rebased to that day's close.
Daily candles, adjusted for splits and dividends. Green arrows are insider buys, red are sells, sized by value; the dashed line is the close on the filing day, the dotted line SPY rebased to it.Charts by TradingView Lightweight Charts™
Rows in this filing
Every transaction in Form 4 0001828536-25-000127, as filed. Open on EDGAR
| Date | Transaction | Shares | Price | Value | Holdings after | Filed |
|---|---|---|---|---|---|---|
| Aug 28, 2025 | POpen-market purchase Common Stock | +11,200 | $1.81 | $20k | 199,206 | Aug 28, 2025 |
Related signals
Other insiders at Energy Vault Holdings, Inc. and this insider’s other filings.
| Score | Company | Insider | Value | Holdings | Filed |
|---|---|---|---|---|---|
| 42Moderate | NRGVsell Energy Vault Holdings, Inc. | Stephanie Unwin director | $427k 115,000 shares | -39% | |
| 56Moderate | NRGVbuy Energy Vault Holdings, Inc. | Dylan Hixon director | $107k 27,472 shares | - | |
| 55Moderate | NRGVbuy Energy Vault Holdings, Inc. | Dylan Hixon director | $320k 85,518 shares | - | |
| 0Weak | Energy Vault Holdings, Inc. | Michael Thomas Beer Chief Financial Officer | $265k 65,000 shares | -6% | |
| 0Weak | Energy Vault Holdings, Inc. | Michael Thomas Beer Chief Financial Officer | $207k 65,000 shares | -6% | |
| 47Moderate | Energy Vault Holdings, Inc. | Robert Piconi Chief Executive Officer | $40k 12,500 shares | +0% | |
| 31Weak | Energy Vault Holdings, Inc. | Mary Beth Mandanas director | $18k 5,000 shares | +1% | |
| 38Weak | Energy Vault Holdings, Inc. | Thomas R Ertel director | $18k 5,450 shares | +2% | |
| 38Weak | Energy Vault Holdings, Inc. | Akshay Ladwa Chief Operations Officer | $12k 4,000 shares | +0% | |
| 38Weak | Energy Vault Holdings, Inc. | Larry Paulson director | $16k 5,000 shares | +1% |
Not investment advice. Scores and forward returns are decision support built from public SEC filings and past prices; they describe what happened after comparable filings, not what will happen after this one. Do your own research and size your risk.