NYSE:GWH

Ess Tech Stock Insider Trading

Industrials > Electrical Equipment & Parts

Buy GWH

*Your capital is at risk

$0.92

-0.0600 (-6.12%)

At Close: Jun 03, 2026

ESS Tech Stock Insider Power

Based on the 100 latest insides trades, we have calculated the insider power to be positive at 86.37. In total, the insiders bought 5.02M and sold 352.75K GWH shares in the last 100 trades. The insider score can be negative despite buy/sell ratio being positive. The score focuses on the quality of the trades.

Insider Power (Last 100 transactions)	86.37
● Buy	5.02M shares
● Sell	352.75K shares
62% Buy Activity Strong Negative Correlation
Sell Signal Low Confidence May 22, 2026 Analysis Breakdown: Signal is highly questionable due to a strongly contradictory positive Insider Power Score of 86.37. Partially supported by a negative historical correlation. Confidence increased due to high data reliability score of 100.

Historical Insider Trades

Date	Type	Person	Role	Amount
Apr 13, 2025 Buy	Common Stock A-Award	Rabb Anthony Chief Financial Officer	C-Suite Officer	42 500 Value: $39.1K
Feb 20, 2025 Sell	Common Stock F-InKind	Rabb Anthony Chief Financial Officer	C-Suite Officer	1 987 Value: $10K
Feb 20, 2025 Sell	Common Stock F-InKind	Rabb Anthony Chief Financial Officer	C-Suite Officer	1 987 Value: $10K
Feb 20, 2025 Sell	Common Stock F-InKind	Goodman Kelly F. Interim CEO	CEO / President	1 489 Value: $7K
Feb 20, 2025 Sell	Common Stock F-InKind	Goodman Kelly F. Interim CEO	CEO / President	1 489 Value: $7K
Feb 13, 2025 Buy	Common Stock	Goodman Kelly F. Interim CEO	CEO / President	0 Value: $0
Feb 13, 2025 Buy	Common Stock	Goodman Kelly F. Interim CEO	CEO / President	0 Value: $0
Feb 10, 2025 Buy	Common Stock A-Award	Goodman Kelly F. Interim CEO	CEO / President	10 000 Value: $53.4K
Feb 10, 2025 Buy	Common Stock A-Award	Goodman Kelly F. Interim CEO	CEO / President	10 000 Value: $53.4K
Nov 20, 2024 Sell	Common Stock F-InKind	Rabb Anthony Chief Financial Officer	C-Suite Officer	1 889 Value: $10K
Nov 20, 2024 Sell	Common Stock F-InKind	Rabb Anthony Chief Financial Officer	C-Suite Officer	1 889 Value: $10K
Nov 18, 2024 Buy	Common Stock P-Purchase	Dresselhuys Eric P. Chief Executive Officer	CEO / President	1 000 Value: $5K
Nov 18, 2024 Buy	Common Stock P-Purchase	Dresselhuys Eric P. Chief Executive Officer	CEO / President	1 000 Value: $5K
Sep 11, 2024 Sell	Common Stock S-Sale	Nijhawan Sandeep Director	Director	7 000 Value: $40.0K
Sep 11, 2024 Sell	Common Stock S-Sale	Nijhawan Sandeep Director	Director	7 000 Value: $40.0K
Aug 30, 2024 Buy	Common Stock P-Purchase	Teamey Kyle Director	Director	142 Value: $956
Aug 30, 2024 Buy	Common Stock P-Purchase	Teamey Kyle Director	Director	142 Value: $956
Aug 29, 2024 Buy	Common Stock M-Exempt	Niggli Michael R Director	Director	11 852 Value: $81.5K
Aug 29, 2024 Buy	Stock Option (right to buy) M-Exempt	Niggli Michael R Director	Director	11 852 Value: $81.5K
Aug 29, 2024 Buy	Stock Option (right to buy) M-Exempt	Niggli Michael R Director	Director	11 852 Value: $81.5K
Aug 29, 2024 Buy	Common Stock M-Exempt	Niggli Michael R Director	Director	11 852 Value: $81.5K
Aug 20, 2024 Sell	Common Stock F-InKind	Rabb Anthony Chief Financial Officer	C-Suite Officer	1 886 Value: $15.5K
Aug 20, 2024 Sell	Common Stock F-InKind	Rabb Anthony Chief Financial Officer	C-Suite Officer	1 886 Value: $15.5K
May 20, 2024 Sell	Common Stock F-InKind	Rabb Anthony Chief Financial Officer	C-Suite Officer	1 886 Value: $22.9K
May 20, 2024 Sell	Common Stock F-InKind	Rabb Anthony Chief Financial Officer	C-Suite Officer	1 886 Value: $22.9K

About Insider Power

Insider Power is a proprietary algorithm developed by StockInvest.us to evaluate the significance of insider transactions. The calculation considers the size, type, and timing of transactions, as well as the insider’s role within the company.

It is important to note that, in general, there is little to no correlation between insider transactions and short-term stock price movements. In one of our studies, only 0.22%^* of stocks with insider activity showed a measurable correlation — and even then, it was unclear whether the effect was caused by insider actions or simply by the stock’s broader trend.

While our algorithms are designed to highlight potentially meaningful signals, these cannot be regarded as statistically significant on their own. Insider trading activity should therefore be seen as informative rather than as direct trading guidance. The Insider Power metric was created to present this information in a clearer and more accessible way, helping investors better understand the possible context of insider activity.

* October 6th, 2025 - Tested on 5562 stocks

ABOUT ESS TECH, INC.

ESS Tech, Inc., an energy storage company, designs and produces iron flow batteries for commercial and utility-scale energy storage applications worldwide. It offers energy storage products, which include Energy Warehouse, a behind-the-meter solution; and Energy Center, a front-of-the-meter solution. The company was founded in 2011 and is headquartered in Wilsonville, Oregon....

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