ZeroStack Corp.
ZSTKNasdaqIndustrials · Wholesale-Drugs, Proprietaries & Druggists' Sundries · A6 · SEC filings ↗ · Compare ⊕
View price & chart on Yahoo Finance ↗Financials
SEC XBRL · annual| FY25 | FY24 | FY23 | FY22 | FY21 | |
|---|---|---|---|---|---|
| Revenue | $35.7M | $35.9M | $76.1M | $37.2M | $9.0M |
| Operating income | −$154.7M | −$8.9M | −$50.4M | −$53.3M | −$19.0M |
| Net income | −$119.7M | −$15.9M | −$57.0M | −$52.6M | −$21.4M |
| Total assets | $130.2M | $26.2M | $23.6M | $81.0M | $85.5M |
| Total liabilities | $59.7M | $21.7M | $17.2M | $24.6M | $8.5M |
| Equity | $70.6M | $4.5M | $6.4M | $56.8M | $77.2M |
| EPS (diluted) | $-43.49 | $-50.02 | $-7.75 | $-13.68 | — |
| Shares out. | 19.4M | 9.0M | 136.9M | 135,573 | 65,517 |
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
- −433.5%
- Net margin
- −335.6%
- Return on equity
- −169.7%
- Return on assets
- −91.9%
- Return on capital (ROCE)
- −127.2%
- Liabilities / assets
- 45.8%
- Debt / equity
- 0.85×
- Book value / share
- $3.63
- Revenue growth (YoY)
- −0.5%
- 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)
- -13.69distress
- Accruals / assets
- −85.3%clean
- Beneish M-Score
- -5.40normal
- 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. What these scores mean →
Signs
● 2 severe● 4 warning● 2 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
- Negative operating cash flow
- Conservative leverage (liabilities < 50% of assets)
- 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 20-Fmissed a reporting deadline ↗Apr 29, 2022
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- Heinrich MichaelActivist (13D)Apr 2, 2026
- Vaiman DanyActivist (13D)Dec 23, 2025
- Reis-Faria DanielActivist (13D)Dec 23, 2025
- Highbridge Capital Management LlcPassive (13G)Aug 14, 2025
- Starke CliffordActivist (13D)Jul 21, 2025
- Empery Asset Management, LpPassive (13G)Apr 29, 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 | 38,049 | 1.2 | -6.9% |
| Apr 30, 2026 | 40,881 | 3.8 | -13.0% |
| Apr 15, 2026 | 46,988 | 2.9 | +25.4% |
| Mar 31, 2026 | 37,467 | 1.8 | +52.0% |
| Mar 13, 2026 | 24,651 | 1.3 | +65.0% |
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- Director / officer changeMay 6, 2026
- Entered a material agreement · Terminated a material agreement · Unregistered equity saleMar 31, 2026
- Amended charter or bylaws · Other material eventJan 29, 2026
- Director / officer changeJan 6, 2026
- Entered a material agreement · Terminated a material agreement · Unregistered equity saleDec 31, 2025
- Director / officer changeDec 23, 2025
- Director / officer change · Shareholder voteDec 22, 2025
- Entered a material agreement · Unregistered equity saleNov 28, 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 ↗- PRER14AFORM PRER14AMay 27, 2026
- ARSFORM ARSMay 8, 2026
- PRE 14AFORM PRE 14AMay 8, 2026
- 4FORM 4May 7, 2026
- 4FORM 4May 7, 2026
- 4FORM 4May 7, 2026
- 8-KFORM 8-KMay 6, 2026
- 10-QFORM 10-QMay 4, 2026
- SCHEDULE 13D/AApr 2, 2026
- 4FORM 4Apr 2, 2026
- 8-KFORM 8-KMar 31, 2026
- 10-KFORM 10-KFeb 27, 2026
- 8-KFORM 8-KJan 29, 2026
- 424B5FORM 424B5Jan 27, 2026
- FWPFORM FWPJan 27, 2026
Event-driven situations (2)
Spot an error in this record? Report it. Every correction is verified against the source filing before we change anything.