ADVENT TECHNOLOGIES HOLDINGS, INC.
ADNHOTCTechnology · Miscellaneous Electrical Machinery, Equipment & Supplies · DE · SEC filings ↗ · Compare ⊕
View price & chart on Yahoo Finance ↗Financials
SEC XBRL · annual| FY24 | FY23 | FY22 | FY21 | FY20 | FY19 | |
|---|---|---|---|---|---|---|
| Revenue | $3.3M | $1.5M | $1.3M | $1.5M | $100,266 | — |
| Operating income | −$18.4M | −$50.7M | −$13.1M | −$7.0M | −$231,431 | −$696,557 |
| Net income | −$41.0M | −$71.4M | −$4.1M | $2.9M | −$357,102 | $2.9M |
| Total assets | $8.0M | $34.7M | $89.6M | $163.0M | $1.9M | $226.0M |
| Total liabilities | $29.3M | $21.3M | $25.4M | $32.8M | $3.7M | $9.0M |
| Equity | −$21.3M | $13.4M | $64.1M | $130.2M | −$1.8M | −$833,802 |
| EPS (diluted) | $-15.65 | $-37.24 | $-2.40 | $0.07 | $-0.02 | — |
| Shares out. | 2.6M | 52.3M | 51.3M | 46.1M | 25.0M | — |
Reported figures from the company's SEC filings (XBRL). Blank where a line item isn't cleanly tagged — never estimated.
Key ratios
from filings · FY2024- Operating margin
- −560.7%
- Net margin
- −1251.3%
- Return on equity
- 192.5%
- Return on assets
- −512.0%
- Return on capital (ROCE)
- —
- Liabilities / assets
- 366.0%
- Debt / equity
- —
- Book value / share
- $-8.08
- Revenue growth (YoY)
- 113.3%
- 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 · FY2024- Altman Z″ (distress)
- -127.18distress
- Accruals / assets
- −529.4%clean
- Piotroski F-Score
- 5/9mixed
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
● 3 severe● 3 warning● 4 good- Negative shareholder equity
- 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
- High leverage (liabilities > 70% of assets)
- Strong return on equity (>15%)
- Revenue is growing year-over-year
- Positive 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-Kmissed a reporting deadline ↗Mar 31, 2026
- NT 10-Qmissed a reporting deadline ↗Nov 14, 2025
- NT 10-Qmissed a reporting deadline ↗May 14, 2025
- NT 10-Kmissed a reporting deadline ↗Mar 31, 2025
- NT 10-Qmissed a reporting deadline ↗Nov 14, 2024
- NT 10-Qmissed a reporting deadline ↗Aug 14, 2024
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.
Insider transactions
SEC Form 4 · most recent| Insider | Date | Type | Shares | Price |
|---|---|---|---|---|
| Hussain NaiemOfficer — Chief Financial Officer | Feb 15, 2024 | Grant | 166,779 | $0.00 |
| Gregoriou VassiliosOfficer — CEO, Chair | Sep 6, 2023 | Sell | 14,157 | $0.53 |
| Brackman Kevin L.Officer — CFO | Sep 6, 2023 | Sell | 27,771 | $0.53 |
| Gourdoupi PanoraiaDirector | Jan 12, 2023 | Grant | 4,688 | $0.00 |
| Gregoriou VassiliosOfficer — CEO, Chair | Feb 4, 2023 | Tax withholding | 72,161 | $2.04 |
| Coffey James F.Officer — COO, GC | Feb 4, 2023 | Tax withholding | 29,046 | $2.04 |
| De Castro Emory SayreOfficer — CTO | Feb 4, 2023 | Tax withholding | 29,401 | $2.04 |
| Gourdoupi PanoraiaDirector | Aug 31, 2022 | Tax withholding | 4,688 | $0.00 |
| Gregoriou VassiliosOfficer — CEO, Chair | Feb 4, 2022 | Tax withholding | 105,122 | $4.04 |
| Brackman Kevin L.Officer — CFO | Aug 24, 2022 | Tax withholding | 26,281 | $2.84 |
| Coffey James F.Officer — COO and General Counsel | Feb 4, 2022 | Tax withholding | 28,639 | $4.04 |
Headline trade per Form 4 (officers, directors, 10%+ owners). Buy/sell read from the filing's structured data — blank where a field isn't cleanly tagged.
Short interest
FINRA · bi-monthly| Settlement | Shares short | Days to cover | Δ vs prior |
|---|---|---|---|
| May 15, 2026 | 15,227 | 1.4 | -12.5% |
| Apr 30, 2026 | 17,394 | 2.4 | 0.0% |
| Apr 15, 2026 | 17,394 | 2.0 | +14.2% |
| Mar 31, 2026 | 15,227 | 1.3 | -0.3% |
| Mar 13, 2026 | 15,277 | 2.8 | -13.3% |
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- Other material eventMay 15, 2026
- Entered a material agreement · Unregistered equity sale · Director / officer changeJan 15, 2026
- Terminated a material agreementNov 10, 2025
- Director / officer changeNov 3, 2025
- Delisting / listing-standard noticeOct 29, 2025
- Shareholder voteOct 22, 2025
- Terminated a material agreementSep 12, 2025
- Entered a material agreement · Unregistered equity saleSep 4, 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 (1)
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