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ESS Tech, Inc. Stock: price and insider trades · United States
No insider purchase over the last 90 days. The latest, by Buckley Drew P, was filed 08 Jun 2026.
ESS Tech, Inc.: what insiders have been doing
ESS Tech, Inc. belongs to the Technology sector. Filings by its managers are published through SEC (Form 4). The last twelve months, up to 18 October 2026, brought 9 filings signed by 3 insiders.
The record shows 1 purchase on the open market worth €22k, made by 1 insider, against 4 sales worth €7,147 by 2 insiders. Taken together, the purchases exceed the sales by €15k. Open-market purchases are the filings investors watch most closely, because the insider pays for the shares out of pocket. Biggest ticket of the year: €22k, bought by Buckley Drew P and made public on 8 June 2026. Among those who bought: 1 chief executive.
The clock since the last published purchase (8 June 2026) now reads 132 days. The median gap between a trade and its publication by SEC (Form 4) is 4 days. For comparison, the SEC allows two business days to file a Form 4. Keep in mind that insiders sell for many reasons unrelated to the outlook, from tax bills to estate planning.
For context, the typical company on the same exchange (median of 5,458 companies) published 22 filings over the same period, against 9 filings here. Over the whole record (from 2021), the tally stands at 20 purchases and 16 sales. The 10-K for the year ended 31 December 2025 shows 1.6 m USD of revenue and -63.4 m USD of net income.
In the same sector, recent insider purchases at Gitlab Inc. and Baozun Inc. also feature in our signals. This summary is built from SEC (Form 4) disclosures alone and does not predict where the share price will go.
Insider Decl.
114
Thresholds
n/a
Buy Volume
€523,372
20 ops. · all time
Sell Volume
€1M
16 ops. · all time
Who traded when
BuySaleKate Eileen Suhadolnik2 sales
Kelly F. Goodman2 sales
Drew P. Buckley1 buy
Eric P. Dresselhuys1 buy
Since the insiders bought
- -53.9%Entry US$0.84 · Close at T+90 US$0.39
Entry is the close on the day after publication, the first price a reader could act on. Prices in the listing currency. Past moves are not a forecast.
This score ranks the purchase within its own market. A position size is suggested only on the venues of the backtested strategy universe; elsewhere, signals stay on watch. Not investment advice.
Financial data
as of FY 2025FY ended December 2025 · cache
US$0.16
Analyst consensus
1 analystsUS$2.00Target US$2.00(+1176%)US$2.00
Income statement
RevenueUS$1.6M
Gross profit-US$27.7M-1748% margin
EBITDA-US$51.7M-3264% margin
Net income-US$63.4M-4007.6% margin
Valuation
PER (forward)-0.2x
P/Book0.4x
Beta1.35
Balance sheet & cash
Market capUS$6.3M
Total debtUS$21.2M
Free Cash Flow-US$53.7M
Profitability & ownership
ROE-21339.7%
ROA-87.8%
% insiders7.3%
% institutions19.0%
Last declaration on 24 August 2026
Declarations114 total
5,400 shares@ US$0.40227.8% of flowCommon StockSEC:0002056453-26-000005:0
3,927 shares@ US$0.402220.1% of flowCommon StockSEC:0002083724-26-000005:0
25,000 shares@ US$1.0264100.0% of flowCommon StockSEC:0002106707-26-000006:0
Canonical exit: 2 Sept 2026 (T+90)
137,500 shares0Common StockSEC:0002083724-26-000002:0
137,500 shares0Common StockSEC:0002056453-26-000002:0
741 shares@ US$1.5414.4% of flowCommon StockSEC:0002083724-26-000003:0
2,269 shares@ US$1.5412.4% of flowCommon StockSEC:0002056453-26-000003:0
1,299 shares@ US$2.4040.2% of flowCommon StockSEC:0002083724-25-000002:0
4,513 shares@ US$2.4039.2% of flowCommon StockSEC:0002056453-25-000005:0
13,513 shares0Common StockSEC:0001884670-25-000003:0
13,513 shares0Common StockSEC:0001705428-25-000005:0
13,513 shares0Common StockSEC:0001685105-25-000005:0
13,513 shares0Common StockSEC:0001377160-25-000005:0
13,513 shares0Common StockSEC:0001885330-25-000003:0
13,513 shares0Common StockSEC:0001549086-25-000004:0
13,513 shares0Common StockSEC:0001544911-25-000003:0
275,000 shares0Common StockSEC:0002083667-25-000002:0
1,232 shares@ US$1.6125.3% of flowCommon StockSEC:0001628280-25-041397:0
4,326 shares@ US$1.6125.0% of flowCommon StockSEC:0002056453-25-000003:0
2,741 shares@ US$1.96100.0% of flowCommon StockSEC:0001628280-25-027258:0
2,164 shares@ US$1.9615.7% of flowCommon StockSEC:0001628280-25-027259:0
100 shares@ US$18.0026.0% of flowCommon StockSEC:0001628280-25-017857:0
36,930 shares0Common StockSEC:0001628280-25-017854:0
10,000 shares0Common StockSEC:0001628280-25-016780:0
1,000 shares@ US$5.22710.4% of flowCommon StockSEC:0001628280-24-048335:0
Canonical exit: 16 Feb 2025 (T+90)
25 of 114 declarations
About ESS Tech, Inc.
ESS Tech, Inc. is a U.S.-based energy storage company listed on the NYSE under the ticker GWH. Founded in 2011 and headquartered in Wilsonville, Oregon, United States, the company focuses on long-duration storage using iron flow battery technology. For investors, ESS sits at the intersection of grid modernization, renewable integration, and infrastructure resilience. Its core investment case is built around a differentiated storage chemistry that uses abundant materials such as iron, salt, and water, positioning the company as a specialist in safer, longer-lasting stationary storage rather than a broad battery manufacturer. ([essinc.com](https://essinc.com/about/))
ESS’s main business is the design, manufacture, and deployment of long-duration energy storage systems for commercial, industrial, and utility-scale customers. Its flagship products include Energy Warehouse and Energy Center, which are intended to provide flexible energy capacity over multiple hours. The company emphasizes non-flammable operation, long cycle life, and a low environmental footprint, attributes that are particularly relevant for renewable-heavy grids where storage needs extend beyond short-duration balancing. In practical terms, ESS is aiming at applications where reliability, safety, and multi-hour discharge capability matter more than the energy density metrics often associated with consumer batteries. ([investors.essinc.com](https://investors.essinc.com/overview/default.aspx))
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From a competitive standpoint, ESS operates in the emerging long-duration energy storage market, where the industry is still forming and commercial standards are not yet fully mature. The company describes itself as a leading manufacturer in iron flow technology and highlights a sizeable patent portfolio, which supports its technology narrative and may help protect its intellectual property position. At the same time, the sector is capital intensive and execution-sensitive: scaling manufacturing, winning repeat deployments, and proving economic competitiveness against alternative storage chemistries are all critical to long-term success. ESS’s niche positioning gives it a distinctive value proposition, but it also means the company must continuously demonstrate commercial traction. ([essinc.com](https://essinc.com/about/))
Geographically, ESS is anchored in the United States, with its headquarters in Oregon, but it has historically targeted customers beyond the domestic market and presents itself as serving global energy storage needs. The company has also pointed to third-party validations and certifications, which are important for utility customers that require bankability, safety assurance, and compliance with industry standards. ([essinc.com](https://essinc.com/about/))
Recent developments are material. In February 2025, ESS announced leadership changes, including the appointment of Kelly Goodman as interim CEO, and said the board was evaluating commercial or financial transactions to support a new strategic direction. At that time, the company stated it was actively bidding on daily-cycling projects in the 12- to 24-hour long-duration storage market, with initial installations targeted for 2027, and that it wanted to address load growth linked to AI and data centers. In January 2026, ESS announced a registered direct offering of approximately $15 million to support working capital and general corporate purposes. These events suggest a company still in transition, balancing technology commercialization with the need to strengthen its financial and strategic flexibility. ([essinc.com](https://essinc.com/wp-content/uploads/2025/02/ESS-Management-Changes-Press-Release.-4919-8247-7848.8.pdf))
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