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ESS Tech, Inc. (GWH-WT) Stock Fundamental Analysis & AI Rating 2026

GWH-WT NYSE Miscellaneous Electrical Machinery, Equipment & Supplies DE CIK: 0001819438
Recently Updated • Analysis: Apr 10, 2026 • SEC Data: 2025-12-31
Combined AI Rating
STRONG SELL
93% Confidence
STRONG AGREEMENT
STRONG SELL
98% Conf
STRONG SELL
88% Conf

📊 GWH-WT Key Takeaways

Revenue: $1.6M
Net Margin: -4,007.6%
Free Cash Flow: $-53.7M
Current Ratio: 1.04x
Debt/Equity: 0.00x
EPS: $-4.34
AI Rating: STRONG SELL with 98% confidence
ESS Tech, Inc. (GWH-WT) receives a STRONG SELL rating with 93% confidence from our AI fundamental analysis based on SEC 10-K filings. With revenue of $1.6M, net profit margin of -4,007.6%, and return on equity (ROE) of -736.1%, ESS Tech, Inc. demonstrates mixed fundamentals in the Utilities sector. Below is our complete GWH-WT stock analysis for 2026.

Is ESS Tech, Inc. (GWH-WT) a Good Investment?

Claude

ESS Tech exhibits severe financial distress with collapsing revenues (-75% YoY), deeply negative unit economics (negative gross margin), and catastrophic cash burn (-$53.7M FCF annually) that exhausts the $14.5M cash position in ~3 months. The company's fundamental business model appears broken with operating losses exceeding revenue by 35x, indicating unsustainable operations.

ChatGPT

Fundamentals are severely impaired: revenue collapsed 74.9% YoY while gross margin is deeply negative, indicating broken unit economics. Cash burn is massive relative to a thin cash balance and equity base, with liquidity barely above parity, implying a near-term need for external capital. Without a rapid and sustained turnaround in margins and revenue, going‑concern risk dominates.

Why Buy ESS Tech, Inc. Stock? GWH-WT Key Strengths

Claude
  • + No long-term debt obligations reduce financial rigidity
  • + Positive stockholders equity ($8.6M) provides some buffer
  • + Operates in potentially high-growth energy storage sector
ChatGPT
  • + Zero long-term debt reduces leverage risk
  • + Some cash on hand ($14.48M) for near‑term needs
  • + Low capex ($3.39M) allows focus on fixing unit economics

GWH-WT Stock Risks: ESS Tech, Inc. Investment Risks

Claude
  • ! Negative gross margins (-1748%) indicate broken unit economics and value destruction at core business level
  • ! Extreme cash burn rate ($50.3M operating, $53.7M free cash flow) with only ~3-4 months runway at current rates
  • ! Revenue collapse of 75% YoY combined with operating losses 35x revenue suggests inability to scale profitably
  • ! Tight current ratio (1.04x) and quick ratio (1.03x) indicate imminent liquidity crisis risk
  • ! ROE and ROA deeply negative (-736% and -124%) demonstrating severe value destruction
  • ! Operating cash flow negative despite minimal capex suggests non-discretionary cash burn
ChatGPT
  • ! Severely negative gross margin (-1748.1%) signals unviable unit economics
  • ! Liquidity runway risk: current ratio 1.04x and OCF -$50.28M vs cash $14.48M
  • ! Revenue down 74.9% YoY indicates demand/execution challenges and reliance on external financing

Key Metrics to Watch

Claude
  • * Monthly cash burn rate and cash position timeline to depletion
  • * Path to next financing round or strategic alternatives announcement
  • * Gross margin stabilization or improvement toward breakeven
  • * Revenue stabilization and return to growth trajectory
  • * Capital expenditure changes suggesting operational adjustments
ChatGPT
  • * Gross margin (%)
  • * Operating cash flow

ESS Tech, Inc. (GWH-WT) Financial Metrics & Key Ratios

Revenue
$1.6M
Net Income
$-63.4M
EPS (Diluted)
$-4.34
Free Cash Flow
$-53.7M
Total Assets
$51.2M
Cash Position
$14.5M

💡 AI Analyst Insight

ESS Tech, Inc. presents a mixed fundamental picture. Review the detailed metrics above to form your own investment thesis.

GWH-WT Profit Margin, ROE & Profitability Analysis

Gross Margin -1,748.1%
Operating Margin -3,626.5%
Net Margin -4,007.6%
ROE -736.1%
ROA -124.0%
FCF Margin -3,390.5%

GWH-WT vs Utilities Sector: How ESS Tech, Inc. Compares

How ESS Tech, Inc. compares to Utilities sector averages

Net Margin
GWH-WT -4,007.6%
vs
Sector Avg 12.0%
GWH-WT Sector
ROE
GWH-WT -736.1%
vs
Sector Avg 10.0%
GWH-WT Sector
Current Ratio
GWH-WT 1.0x
vs
Sector Avg 0.8x
GWH-WT Sector
Debt/Equity
GWH-WT 0.0x
vs
Sector Avg 1.4x
GWH-WT Sector

Sector benchmarks are approximate industry averages. Actual sector performance may vary.

Is ESS Tech, Inc. Stock Overvalued? GWH-WT Valuation Analysis 2026

Based on fundamental analysis, ESS Tech, Inc. has mixed fundamental signals relative to the Utilities sector in 2026.

Return on Equity
-736.1%
Sector avg: 10%
Net Profit Margin
-4,007.6%
Sector avg: 12%
Revenue Growth
N/A
Year-over-year
Debt/Equity
0.00x
Sector avg: 1.4x

Note: This is a fundamental analysis based on SEC filings. For P/E ratio, price targets, and market-based valuation, consult financial data providers. This is not investment advice.

ESS Tech, Inc. Balance Sheet: GWH-WT Debt, Cash & Liquidity

Current Ratio
1.04x
Quick Ratio
1.03x
Debt/Equity
0.00x
Debt/Assets
83.2%
Interest Coverage
-1,979.55x
Long-term Debt
$0.0

GWH-WT Revenue & Earnings Growth: 5-Year Financial Trend

GWH-WT 5-year financial data: Year 2021: Revenue $0, Net Income -$30.4M, EPS $-0.52. Year 2022: Revenue $894.0K, Net Income -$477.1M, EPS $-5.73. Year 2023: Revenue $7.5M, Net Income -$78.0M, EPS $-0.51. Year 2024: Revenue $7.5M, Net Income -$77.6M, EPS $-7.27. Year 2025: Revenue $6.3M, Net Income -$86.2M, EPS $-7.32.
Revenue
Net Income
EPS (right axis)

5-Year Trend Summary: ESS Tech, Inc.'s revenue has remained relatively flat over the 5-year period, with a 0% decline. The most recent EPS of $-7.32 indicates the company is currently unprofitable.

GWH-WT Revenue Growth, EPS Growth & YoY Performance

Revenue Growth
N/A
Year-over-year
Net Income Growth
N/A
Year-over-year
EPS Growth
N/A
Earnings per share
FCF Margin
-3,390.5%
Free cash flow / Revenue

GWH-WT Quarterly Earnings & Performance

Quarterly financial performance data for ESS Tech, Inc. including revenue, net income, and earnings per share.
Quarter Revenue Net Income EPS
Q3 2025 $214.0K -$10.4M $-0.73
Q2 2025 $348.0K -$11.1M $-0.90
Q1 2025 $599.0K -$18.0M $-1.50
Q3 2024 $359.0K -$16.6M $-1.59
Q2 2024 $348.0K -$18.3M $-0.12
Q1 2024 $372.0K -$18.3M $-0.10
Q3 2023 $192.0K -$5.7M $-0.11
Q2 2023 $686.0K -$5.7M $-0.10

Data sourced from SEC EDGAR 10-Q quarterly filings. Figures may represent quarterly or cumulative values.

ESS Tech, Inc. Dividends, Buybacks & Capital Allocation

Operating Cash Flow
-$50.3M
Cash generated from operations
Capital Expenditures
$3.4M
Investment in assets
Dividends
None
No dividend program

GWH-WT SEC Filings: Latest 10-K & 10-Q Analysis

Access official SEC EDGAR filings for ESS Tech, Inc. (CIK: 0001819438)

📋 Recent SEC Filings

Date Form Document Action
Apr 15, 2026 DEF 14A ghw-20260415.htm View →
Apr 15, 2026 8-K wk-20260410.htm View →
Mar 5, 2026 10-K ghw-20251231.htm View →
Mar 5, 2026 8-K wk-20260305.htm View →
Feb 26, 2026 4 xslF345X05/form4-02272026_020250.xml View →

Frequently Asked Questions about GWH-WT

What is the AI rating for GWH-WT?

ESS Tech, Inc. (GWH-WT) has a Combined AI Rating of STRONG SELL from Claude (STRONG SELL) and ChatGPT (STRONG SELL) with 93% combined confidence, based on fundamental analysis of SEC EDGAR filings.

What are GWH-WT's key strengths?

Claude: No long-term debt obligations reduce financial rigidity. Positive stockholders equity ($8.6M) provides some buffer. ChatGPT: Zero long-term debt reduces leverage risk. Some cash on hand ($14.48M) for near‑term needs.

What are the risks of investing in GWH-WT?

Claude: Negative gross margins (-1748%) indicate broken unit economics and value destruction at core business level. Extreme cash burn rate ($50.3M operating, $53.7M free cash flow) with only ~3-4 months runway at current rates. ChatGPT: Severely negative gross margin (-1748.1%) signals unviable unit economics. Liquidity runway risk: current ratio 1.04x and OCF -$50.28M vs cash $14.48M.

What is GWH-WT's revenue and growth?

ESS Tech, Inc. reported revenue of $1.6M.

Does GWH-WT pay dividends?

ESS Tech, Inc. does not currently pay dividends.

Where can I find GWH-WT SEC filings?

Official SEC filings for ESS Tech, Inc. (CIK: 0001819438) including 10-K, 10-Q, and 8-K reports are available on SEC EDGAR.

What is GWH-WT's EPS?

ESS Tech, Inc. has a diluted EPS of $-4.34.

How is the AI analysis conducted?

Two independent AI systems — Claude (Anthropic) and ChatGPT (OpenAI) — analyze SEC EDGAR filings including 10-K annual reports and 10-Q quarterly reports. Each AI evaluates financial health, profitability ratios, balance sheet strength, and growth metrics. The combined rating reflects both perspectives for balanced insights.

Is GWH-WT a good stock to buy right now?

Based on our AI fundamental analysis in April 2026, ESS Tech, Inc. has a STRONG SELL rating with 93% confidence. Review the strengths and risks sections above before making a decision. This is not investment advice.

Is GWH-WT stock overvalued or undervalued?

Valuation metrics for GWH-WT: ROE of -736.1% (sector avg: 10%), net margin of -4,007.6% (sector avg: 12%). Compare these metrics with sector averages to assess valuation.

Should I buy GWH-WT stock in 2026?

Our dual AI analysis gives ESS Tech, Inc. a combined STRONG SELL rating for 2026. Revenue is data pending, with profitability at or below sector average. Always conduct your own research.

What is GWH-WT's free cash flow?

ESS Tech, Inc.'s operating cash flow is $-50.3M, with capital expenditures of $3.4M. FCF margin is -3,390.5%.

How does GWH-WT compare to other Utilities stocks?

Vs Utilities sector averages: Net margin -4,007.6% (avg: 12%), ROE -736.1% (avg: 10%), current ratio 1.04 (avg: 0.8).

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Disclaimer: This analysis is generated by Claude AI (Anthropic) and ChatGPT (OpenAI) based on publicly available SEC EDGAR filings. It does not include stock price data and should not be considered financial advice. All fundamental data is sourced from SEC public domain filings. Always conduct your own research and consult with a qualified financial advisor before making investment decisions.
Data Source: SEC EDGAR | Analysis Date: Apr 10, 2026 | Data as of: 2025-12-31 | Powered by Claude AI