ESS Tech, Inc.

GWHNYSEIndustrials● Active

$0.85

$-0.05(-5.82%)

Market Cap$10753405

P/E Ratio—

52W High$13.87

52W Low$0.565

Avg Volume633K

Open$0.91

Beta1.42

Insider Trades Ownership Employees

ESS Tech, Inc. (GWH) Insider Trading

Form 4 buy vs sell counts, ratio, and sentiment — switch this quarter or last 12 months; chart and transactions below.

SEC EDGAR · FMP · GWH · as of Jun 8, 2026

Activity summary

Buy transactions

P-Purchase only

Sell transactions

12 Months

Buy/Sell ratio

0.00

Buy/Sell (by trades)

Overall sentiment

NEUTRAL

↑ Buy 0%Active transactions only · RSU vesting excluded100% Sell ↓

ESS Tech, Inc. insiders have shown mixed buying and selling activity over the past 12 Months.

▸ Source: SEC EDGAR · Form 3 & 4 · via Financial Modeling Prep · Buy = P-Purchase only · Sell = S-Sale only

As of Jun 8, 2026

GWH insider buying and selling by quarter

GWH insider selling · GWH insider buying stocks · quarterly insider activity

Total insider buying (incl. awards)Total insider selling

1.5M760K0

2024 Q2

2024 Q3

2024 Q4

2025 Q1

2025 Q2

2025 Q3

2025 Q4

2026 Q1

Mobile shows last 4Q · Desktop shows full 8Q

▸ Source: SEC EDGAR · Form 3 & 4 · via Financial Modeling Prep · last 8 quarters

As of Jun 8, 2026

Active insiders

Most active in past 12 months · GWH ceo insider trading

Showing all insiders · Click a card to filter the transactions table below

▸ Aggregated from reportingName · top 5 by trade count (12M) · no extra API

Recent insider transactions

GWH executive sell shares · GWH board member insider trading · GWH insider trading SEC filing

Showing 83 most recent · Common Stock · Form 4 only

Scroll horizontally to see all columns

Date	Insider	Type	Shares	Price	Value	After trans.	Filing
May 29, 2026	WELLMAN ALEXI Director	Award	13,513	—	—	52,399	Form 4
May 29, 2026	Quarls Harry Director	Award	13,513	—	—	68,769	Form 4
May 29, 2026	Nijhawan Sandeep Director	Award	13,513	—	—	42,563	Form 4
May 29, 2026	Hossfeld Rich Director	Award	13,513	—	—	41,372	Form 4
May 29, 2026	Garabedian Raffi Director	Award	13,513	—	—	53,185	Form 4
May 21, 2026	Suhadolnik Kate Eileen CFO	Sale	1,735	$0.92	$2K	162,679	Form 4
May 22, 2026	Suhadolnik Kate Eileen CFO	Sale	1,922	$0.93	$2K	160,757	Form 4
May 21, 2026	Goodman Kelly F. SEE REMARKS	Sale	2,482	$0.92	$2K	213,371	Form 4
May 22, 2026	Goodman Kelly F. SEE REMARKS	Sale	2,751	$0.93	$3K	210,620	Form 4
Feb 20, 2026	Suhadolnik Kate Eileen CFO	Sale	741	$1.54	$1K	164,414	Form 4
Feb 20, 2026	Goodman Kelly F. SEE REMARKS	Sale	2,269	$1.54	$3K	215,853	Form 4
Feb 13, 2026	Suhadolnik Kate Eileen CFO	Award	137,500	—	—	165,155	Form 4
Feb 13, 2026	Goodman Kelly F. SEE REMARKS	Award	137,500	—	—	218,122	Form 4
Nov 20, 2025	Suhadolnik Kate Eileen Interim CFO	Other	1,299	$2.40	$3K	27,655	Form 4
Nov 20, 2025	Goodman Kelly F. Interim CEO	Other	4,513	$2.40	$11K	80,622	Form 4
Oct 13, 2025	NIGGLI MICHAEL R Director	Award	13,513	—	—	90,825	Form 4
Oct 13, 2025	WELLMAN ALEXI Director	Award	13,513	—	—	38,886	Form 4
Oct 13, 2025	Quarls Harry Director	Award	13,513	—	—	13,513	Form 4
Oct 13, 2025	Nijhawan Sandeep Director	Award	13,513	—	—	29,050	Form 4
Oct 13, 2025	Garabedian Raffi Director	Award	13,513	—	—	39,672	Form 4
Oct 13, 2025	Hossfeld Rich Director	Award	13,513	—	—	27,859	Form 4
Oct 13, 2025	Teamey Kyle Director	Award	13,513	—	—	38,740	Form 4
Aug 18, 2025	Trivedi Jigish Dhirajlal COO	Award	275,000	—	—	275,000	Form 4
Aug 20, 2025	Suhadolnik Kate Eileen Interim CFO	Other	1,232	$1.61	$2K	28,954	Form 4
Aug 20, 2025	Goodman Kelly F. Interim CEO	Other	4,326	$1.61	$7K	85,135	Form 4

WELLMAN ALEXI

Director

Award

Date

May 29

13,513

Price

—

Value

—

View Form 4 on SEC.gov

Quarls Harry

Director

Award

Date

May 29

13,513

Price

—

Value

—

View Form 4 on SEC.gov

Nijhawan Sandeep

Director

Award

Date

May 29

13,513

Price

—

Value

—

View Form 4 on SEC.gov

Hossfeld Rich

Director

Award

Date

May 29

13,513

Price

—

Value

—

View Form 4 on SEC.gov

Garabedian Raffi

Director

Award

Date

May 29

13,513

Price

—

Value

—

View Form 4 on SEC.gov

Suhadolnik Kate Eileen

CFO

Sale

Date

May 21

1,735

Price

$0.92

Value

$2K

View Form 4 on SEC.gov

Suhadolnik Kate Eileen

CFO

Sale

Date

May 22

1,922

Price

$0.93

Value

$2K

View Form 4 on SEC.gov

Goodman Kelly F.

SEE REMARKS

Sale

Date

May 21

2,482

Price

$0.92

Value

$2K

View Form 4 on SEC.gov

Goodman Kelly F.

SEE REMARKS

Sale

Date

May 22

2,751

Price

$0.93

Value

$3K

View Form 4 on SEC.gov

Suhadolnik Kate Eileen

CFO

Sale

Date

Feb 20

741

Price

$1.54

Value

$1K

View Form 4 on SEC.gov

Goodman Kelly F.

SEE REMARKS

Sale

Date

Feb 20

2,269

Price

$1.54

Value

$3K

View Form 4 on SEC.gov

Suhadolnik Kate Eileen

CFO

Award

Date

Feb 13

137,500

Price

—

Value

—

View Form 4 on SEC.gov

Goodman Kelly F.

SEE REMARKS

Award

Date

Feb 13

137,500

Price

—

Value

—

View Form 4 on SEC.gov

Suhadolnik Kate Eileen

Interim CFO

Other

Date

Nov 20

1,299

Price

$2.40

Value

$3K

View Form 4 on SEC.gov

Goodman Kelly F.

Interim CEO

Other

Date

Nov 20

4,513

Price

$2.40

Value

$11K

View Form 4 on SEC.gov

NIGGLI MICHAEL R

Director

Award

Date

Oct 13

13,513

Price

—

Value

—

View Form 4 on SEC.gov

WELLMAN ALEXI

Director

Award

Date

Oct 13

13,513

Price

—

Value

—

View Form 4 on SEC.gov

Quarls Harry

Director

Award

Date

Oct 13

13,513

Price

—

Value

—

View Form 4 on SEC.gov

Nijhawan Sandeep

Director

Award

Date

Oct 13

13,513

Price

—

Value

—

View Form 4 on SEC.gov

Garabedian Raffi

Director

Award

Date

Oct 13

13,513

Price

—

Value

—

View Form 4 on SEC.gov

Hossfeld Rich

Director

Award

Date

Oct 13

13,513

Price

—

Value

—

View Form 4 on SEC.gov

Teamey Kyle

Director

Award

Date

Oct 13

13,513

Price

—

Value

—

View Form 4 on SEC.gov

Trivedi Jigish Dhirajlal

COO

Award

Date

Aug 18

275,000

Price

—

Value

—

View Form 4 on SEC.gov

Suhadolnik Kate Eileen

Interim CFO

Other

Date

Aug 20

1,232

Price

$1.61

Value

$2K

View Form 4 on SEC.gov

Goodman Kelly F.

Interim CEO

Other

Date

Aug 20

4,326

Price

$1.61

Value

$7K

View Form 4 on SEC.gov

⚡ = value ≥ $1M · Award/Option price shows — · formType=4 · securityName=Common Stock · url → sec.gov/Archives/edgar

1 / 4

▸ Source: SEC EDGAR · Form 4 filings · ⚡ = value ≥ $1M · Award/Option price shows —

About GWH insider trading

GWH insider trades

ESS Tech, Inc. (GWH) insider trading data is sourced from SEC Form 4 filings submitted by corporate insiders, including Suhadolnik Kate Eileen (CFO), Goodman Kelly F. (SEE REMARKS), WELLMAN ALEXI (Director). Over the past 12 months, 5 insiders have filed transactions with the SEC. GWH insiders have been mixed buying and selling, which may reflect pre-scheduled Rule 10b5-1 plan executions.

For ESS Tech, Inc.'s institutional ownership breakdown and insider ownership percentage, see the Ownership tab → Ownership tab →

Buy/Sell signal logic

acquisitionOrDisposition field:

A = Acquisition (buy) · D = Disposition (sell)

RSU vesting (M-Exempt) excluded from sentiment

Form 4SEC filing required within 2 business days of any insider transaction

10b5-1Pre-scheduled trading plan that allows insiders to sell on autopilot

Open MktDirect purchase or sale on the open market (excludes awards, options)

Ownership SEC filings Financial statements Price history Forecast & ratings Earnings

Frequently asked questions

GWH insider trading · 5 questions

The insiders of ESS Tech, Inc. (GWH) include executives and directors such as Suhadolnik Kate Eileen (CFO), Goodman Kelly F. (SEE REMARKS), WELLMAN ALEXI (Director), among others. Over the past 12 months, 5 insiders have filed Form 4 transactions with the SEC. Insider transactions are required to be reported within 2 business days of the trade date.

GWH board member insider tradingwho are GWH insidersGWH insider rosterESS Tech, Inc. executives insider activity

▸ Source: FMP /stable/insider-trading/search · SEC EDGAR Form 3 & 4 · acquisitionOrDisposition A=Buy, D=Sell · RSU vesting (M-Exempt) excluded from sentiment bar · As of Jun 8, 2026