ESS Tech, Inc.
GWHNYSETechnology · Miscellaneous Electrical Machinery, Equipment & Supplies · DE · SEC filings ↗ · Compare ⊕
View price & chart on Yahoo Finance ↗Financials
SEC XBRL · annual| FY25 | FY24 | FY23 | FY22 | FY21 | FY20 | |
|---|---|---|---|---|---|---|
| Revenue | $1.6M | $6.3M | $7.5M | $894,000 | $0 | $0 |
| Operating income | −$57.4M | −$89.8M | −$85.9M | −$105.5M | −$60.6M | −$17.4M |
| Net income | −$63.4M | −$86.2M | −$77.6M | −$78.0M | −$477.1M | −$30.4M |
| Total assets | $51.2M | $71.8M | $143.2M | $173.6M | $250.2M | $9.0M |
| Total liabilities | $42.6M | $42.9M | $39.9M | $36.6M | $45.0M | $36.9M |
| Equity | $8.6M | $28.9M | $103.4M | $137.0M | $205.2M | −$27.9M |
| EPS (diluted) | $-4.34 | $-7.32 | $-7.27 | $-0.51 | $-5.73 | $-0.52 |
| Shares out. | 12.1M | 174.9M | 154.3M | 152.6M | 135.2M | 58.9M |
Reported figures from the company's SEC filings (XBRL). Blank where a line item isn't cleanly tagged — never estimated.
Key ratios
from filings · FY2025- Operating margin
- −3626.5%
- Net margin
- −4007.6%
- Return on equity
- −736.1%
- Return on assets
- −124.0%
- Return on capital (ROCE)
- −221.8%
- Liabilities / assets
- 83.2%
- Debt / equity
- 4.94×
- Book value / share
- $0.71
- Revenue growth (YoY)
- −74.9%
- Net income growth (YoY)
- —
Computed from the company's own SEC figures — no market price, so these are facts, not a valuation. Book value per share is reported equity ÷ shares; it is not the stock price.
Financial health
forensic scores · FY2025- Altman Z″ (distress)
- -61.09distress
- Accruals / assets
- −25.7%clean
- Piotroski F-Score
- 2/9weak
Altman Z″is a textbook bankruptcy-distress score from book values only (>2.6 safe · 1.1–2.6 grey · <1.1 distress). Accruals = (net income − operating cash flow) ÷ assets; persistently high accruals are an earnings-quality red flag. Beneish M-Scoreis an eight-ratio screen comparing this year with last (M > −1.78 = elevated manipulation-risk screen, not proof). Piotroski F-Scorecounts how many of nine fundamental-health checks pass (shown as passed / applicable; we use operating margin and total liabilities as documented proxies where the exact input isn't XBRL-tagged). Computed from SEC filings — descriptive factors, not advice or a forecast.
Quality score
EDS ScoreOur own multi-factor score from free SEC data — profitability, growth, financial strength, earnings quality, and event/ownership catalysts. No market price and no licensed model: each axis is the share of source-backed checks it passes. Descriptive factors, not advice or a forecast.
Signs
● 2 severe● 5 warning● 1 good- Altman Z″ in the distress zone
- Filed a late-filing notice (Form NT) — missed an SEC deadline
- Operating losses (negative operating margin)
- Reported a net loss
- Revenue declined year-over-year
- High leverage (liabilities > 70% of assets)
- Negative operating cash flow
- Clean earnings (low accruals)
Derived from the company's own SEC figures (fundamentals, forensic scores, filing discipline) — descriptive factors, not advice or a forecast.
Risk flags
late SEC filings- NT 10-Qmissed a reporting deadline ↗Nov 16, 2021
- NT 10-Qmissed a reporting deadline ↗Aug 16, 2021
- NT 10-Qmissed a reporting deadline ↗May 18, 2021
A Form NT means the company notified the SEC it would file a periodic report late — often an accounting, audit or liquidity warning sign. Also search SEC enforcement actions for this company.
5%+ owners
SEC Schedule 13D / 13G · last 3 yrs- Alyeska Investment Group, L.P.Passive (13G)May 15, 2026
- Ayrton Capital LlcPassive (13G)May 11, 2026
- Softbank Group Corp.Activist (13D)Mar 3, 2025
Holders who disclosed a 5%+ stake. 13D signals intent to influence or control; 13G is a passive holding. Latest filing per holder — open it for the exact stake.
Short interest
FINRA · bi-monthly| Settlement | Shares short | Days to cover | Δ vs prior |
|---|---|---|---|
| May 15, 2026 | 1.6M | 1.0 | -1.3% |
| Apr 30, 2026 | 1.6M | 3.1 | -21.9% |
| Apr 15, 2026 | 2.0M | 5.8 | +24.5% |
| Mar 31, 2026 | 1.6M | 5.6 | +12.6% |
| Mar 13, 2026 | 1.4M | 1.4 | +29.6% |
Shares sold short as reported to FINRA. Days-to-cover = short shares ÷ average daily volume — higher means more potential squeeze pressure.
Material events
SEC Form 8-K · most recent- Shareholder voteMay 29, 2026
- Results of operationsMay 7, 2026
- Director / officer changeApr 15, 2026
- Results of operations · Other material eventMar 5, 2026
- Entered a material agreementJan 30, 2026
- Results of operations · Director / officer changeJan 29, 2026
- Director / officer changeJan 6, 2026
- Entered a material agreementDec 5, 2025
Events the company reported on Form 8-K, labelled by the SEC item code it filed under — its own classification, not our interpretation.
Recent SEC filings
All filings ↗Event-driven situations (3)
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