How many insider trades does FilingIQ track for GWH?

FilingIQ tracks 147 Form 4 insider transactions for GWH (ESS Tech, Inc.), covering filings from Oct 8, 2021 onwards. 2 of those were filed in the last 90 days.

Are GWH insiders net buyers or net sellers?

Across the full Form 4 history for GWH, 21 transactions (14%) were open-market purchases and 23 (16%) were open-market sales. Compensatory awards and option exercises are filtered out of these counts.

Where does GWH insider data come from?

Every transaction shown on this page is sourced directly from SEC EDGAR Form 4 filings. FilingIQ parses the raw XML, normalises insider identity across reporting variations, and scores each trade on its multi-factor composite model.

What sector is GWH in?

ESS Tech, Inc. (GWH) is classified in the Industrials sector, specifically Electrical Equipment & Parts, with a current market capitalisation of $38.31M.

GWH insider trading

NYSE Industrials

ESS Tech, Inc. — scored insider trade history from SEC Form 4 filings, parsed and contextualised by FilingIQ.

Total Form 4 trades

147

Last 90 days

Buys / sells

14% / 16%

Market cap

$38.31M

About ESS Tech, Inc.

ESS Tech, Inc., an energy storage company, engages in the design and production of 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 the gigawatt-hour energy base storage product, a fully configurable layout that integrates with any site location and that allows the power to be decoupled from the capacity. The company was founded in 2011 and is headquartered in Wilsonville, Oregon.

Company website: essinc.com

GWH insider activity at a glance

FilingIQ has scored 147 insider transactions for GWH since Oct 8, 2021. The most recent filing in our index is dated Feb 20, 2026.

Across the full history, 21 open-market purchases and 23 open-market sales were filed under transaction codes P and S respectively. Compensatory share awards (code A) and option exercises (code M) are tracked separately and not counted here.

The average FilingIQ composite score on GWH insider trades is 57.6/100, produced by FilingIQ's multi-factor Form 4 model. Model framework documented at methodology.

View live GWH trades on FilingIQ Raw filings on SEC EDGAR

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Frequently asked

How many insider trades does FilingIQ track for GWH?: FilingIQ tracks 147 Form 4 insider transactions for GWH (ESS Tech, Inc.), covering filings from Oct 8, 2021 onwards. 2 of those were filed in the last 90 days.
Are GWH insiders net buyers or net sellers?: Across the full Form 4 history for GWH, 21 transactions (14%) were open-market purchases and 23 (16%) were open-market sales. Compensatory awards and option exercises are filtered out of these counts.
Where does GWH insider data come from?: Every transaction shown on this page is sourced directly from SEC EDGAR Form 4 filings. FilingIQ parses the raw XML, normalises insider identity across reporting variations, and scores each trade on its multi-factor composite model.
What sector is GWH in?: ESS Tech, Inc. (GWH) is classified in the Industrials sector, specifically Electrical Equipment & Parts, with a current market capitalisation of $38.31M.

Methodology & sources

Every GWH insider transaction shown on FilingIQ is parsed directly from a public SEC Form 4 XML filing. Insider identity is normalised across reporting variants (CIK changes, name spellings, related-party indirect holdings). The FilingIQ composite score is documented in full on the team page and algo disclosure. Not investment advice; see disclaimer.