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AUTOMATED SEC FILING DILIGENCE BRIEF
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ADVENT TECHNOLOGIES HOLDINGS, INC.

CIK 0001744494Ticker ADNHSEC observed OTC

Automatically organized from the issuer’s official SEC submissions index. This brief is the starting evidence layer for buyer, FA, legal and broker-dealer review—not a legal conclusion or safety rating.

Open issuer dossier
Reporting & material events88

captured official filings

Registration & offering26

captured official filings

Ownership39

captured official filings

Governance7

captured official filings

PRIORITY FILING CUES

What to review next

Rules are applied to retained SEC filing types in this issuer record. They prioritize reading work; they are not ratings or conclusions.

  1. CRITICAL
    EFFECT2025-08-27 · form-type review cue
    SEC source →
  2. CRITICAL
    424B32025-08-27 · form-type review cue
    SEC source →
  3. WATCH
    S-12025-08-18 · form-type review cue
    SEC source →
WHAT THIS AUTOMATES

One evidence index instead of a manual filing hunt.

It groups recent reporting, registration/offer, ownership and governance filings, preserves the SEC source link and keeps a reusable chronology in the issuer’s record.

PROFESSIONAL DELIVERY LAYER

What teams can pay to automate next.

Cross-version text comparison, monitored alerts, change-specific diligence questions, CSV/PDF exports and a shared deal-team brief are the professional workflow built on this public evidence layer.

MACHINE-DETECTED FILING CHANGE RADAR

Version comparison waiting for a public amendment pair

No S-1/A or F-1/A with a comparable prior public registration filing is currently captured for this issuer. The radar activates automatically when a public amendment sequence is available.

Open Evidence Snapshot →
ISSUER REVIEW PLAN

What to verify next

Generated from retained official filing types and chronology. This is a work sequence, not legal, accounting, compliance, investment or transaction advice.

  1. Registration & offering path (5 retained)
    Read the latest registration filing, then monitor for an amendment, EFFECT notice or 424B prospectus.
  2. Current disclosure path (48 retained)
    Open the retained current reports and identify the reported item, effective date and later update.
  3. Financial & ownership record (30 retained)
    Review periodic financial, ownership and governance records in their original filing context.

A dated Download Edition preserves this source-linked view for a project file.

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Know what the paid record contains.

This is a dated working copy of the public issuer record, organized for a project file—not a separate data feed or an opinion.

180 retained SEC filingsLatest retained filing: 2026-07-22.Printable HTML record + CSV official-source indexOne issuer · one payment · no account

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  • Source-linked filing chronology and registration path
  • Filing-change radar plus financing, legal, tax/lien and regulatory disclosure cues
  • Official-source index for project-file archiving and downloadable CSV export
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AUTOMATED EVIDENCE SNAPSHOT

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Download a printable HTML snapshot of the current public-record timeline and change view. A one-time download unlocks a saveable issuer record. Official sources remain controlling.

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DISCLOSURE CONTEXT SCREEN

Specific public-record cues, separated from generic language

Reads selected SEC filing text by sentence. Contents-page labels, generic risk language and allocation discussion are excluded; historical financing language is kept separate.

  1. FINANCING

    Under the Promissory Note, the Company is required to repay the borrowed amount in one payment on January 7, 2027 (the “Maturity Date”).

    8-K · 2026-01-15 · official SEC source ↗
  2. FINANCING

    Additionally, the outstanding principal and interest under the Promissory Note shall automatically convert into Common Stock upon the occurrence of a “Qualified Financing” of the Company, which is defined as an issuance of securities by the Company resulting in gross proceeds of at least $25,000,000.

    8-K · 2026-01-15 · official SEC source ↗
  3. FINANCING

    The Company received funding under the Promissory Note on January 14, 2026, and intends to use the proceeds from the Promissory Note for payment of certain corporate expenses and general working capital purposes.

    8-K · 2026-01-15 · official SEC source ↗
  4. FINANCING

    1 Secured Promissory Note dated as of January 7, 2026, issued by the Company in favor of Chris Antonopoulos 104 Cover Page Interactive Data File.

    8-K · 2026-01-15 · official SEC source ↗

Scope: automated text screening of selected SEC filings only. Each cue requires review of the linked filing; it does not confirm a claim, legal status, tax status, financing completion or current issuer condition.

LEGACY TERM SCREEN · SOURCE INDEX

Financing, legal and disclosure cues

This screen counts source documents with a reading cue, never the number of underlying events. A cue may be generic risk language; open the cited SEC source before drawing any conclusion.

View screened SEC sources (4)
8-K · 2026-07-228-K · 2026-05-158-K · 2026-01-1510-Q · 2025-11-17

Coverage boundary: this is a keyword screen of selected SEC filings only. It is not a court-docket search, tax-compliance review, lien clearance, sanctions screen, adverse-media search or a complete count of financings. A zero result means no matching term in the readable documents screened—not that the underlying issue is absent. Verify each cue in the linked official filing and use the appropriate independent professionals.

CAPITAL & OFFERING RECORD

Official filing path for financing review

Registration, amendment, prospectus, shelf and current-report nodes are organized here as a reading path. Use the SEC source for terms, status and materiality.

Browse all captured financing filings →
1registration / amendment nodes
15prospectus nodes
0shelf / follow-on nodes
64current-report nodes to review
  1. 8-K
    Current report — review financing contextOpen SEC source →
  2. 8-K
    Current report — review financing contextOpen SEC source →
  3. 8-K
    Current report — review financing contextOpen SEC source →
  4. 8-K
    Current report — review financing contextOpen SEC source →
  5. 8-K
    Current report — review financing contextOpen SEC source →
  6. 8-K
    Current report — review financing contextOpen SEC source →
  7. 8-K
    Current report — review financing contextOpen SEC source →
  8. 8-K
    Current report — review financing contextOpen SEC source →
  9. 8-K
    Current report — review financing contextOpen SEC source →
  10. 424B3
    Prospectus / offering documentOpen SEC source →
  11. 8-K
    Current report — review financing contextOpen SEC source →
  12. S-1
    Initial registration statementOpen SEC source →
  13. 8-K
    Current report — review financing contextOpen SEC source →
  14. 8-K
    Current report — review financing contextOpen SEC source →
  15. 8-K
    Current report — review financing contextOpen SEC source →
  16. 8-K
    Current report — review financing contextOpen SEC source →
  17. 8-K
    Current report — review financing contextOpen SEC source →
  18. 8-K
    Current report — review financing contextOpen SEC source →
  19. 8-K
    Current report — review financing contextOpen SEC source →
  20. 8-K
    Current report — review financing contextOpen SEC source →
  21. 8-K
    Current report — review financing contextOpen SEC source →
  22. 8-K
    Current report — review financing contextOpen SEC source →

Interpretation boundary: filing counts are not financing-round counts, proceeds, closing status or current capitalization. A registration, prospectus or report can relate to different purposes; use the linked official filing and appropriate advisers to verify each event.

KEY OFFERING LANGUAGE

What the latest offering documents say

Candidate sentence excerpts from readable official SEC filing text. This provides a fast reading layer for offering structure and terms; it is not a normalized term sheet or a transaction conclusion.

CANDIDATE LANGUAGE OBSERVED

Offering structure

Candidate language describing the securities or registration structure.

“We are not selling any shares of common stock being offered by this prospectus and will not receive any of the proceeds from the sale of such shares by Hudson Global.”
424B3 · 2025-08-27 · Open SEC source →
CANDIDATE LANGUAGE OBSERVED

Shares / price

Candidate language about shares, units or offering-price terms.

“The shares included in this prospectus consist of shares of common stock that we have issued or that we may, in our discretion, elect to issue and sell to Hudson Global, from time to time after the date of this prospectus and the date of the satisfaction of the conditions to the Selling Stockholder’s purchase obligations (the “Commencement Date”) as set forth in the equity purchase agreement we entered into w”
424B3 · 2025-08-27 · Open SEC source →
CANDIDATE LANGUAGE OBSERVED

Use of proceeds

Candidate language describing stated proceeds or intended use.

“The date of this prospectus is August 27, 2025 Page PROSPECTUS SUMMARY 1 RISK FACTORS 12 CAUTIONARY STATEMENT REGARDING FORWARD-LOOKING STATEMENTS 35 HUDSON GLOBAL TRANSACTION 37 USE OF PROCEEDS 41 PLAN OF DISTRIBUTION 43 DIVIDEND POLICY 45 CAPITALIZATION 46 DILUTION 47 MANAGEMENT’S DISCUSSION AND ANALYSIS OF FINANCIAL CONDITION AND RESULTS OF OPERATIONS 48 BUSINESS 68 MANAGEMENT 83 EXECUTIVE COMPENSATION 89 CERTAIN RELA”
424B3 · 2025-08-27 · Open SEC source →
NO CANDIDATE LANGUAGE IN SCREENED TEXT

Convertible / warrant terms

Candidate language about conversion, warrants or related instruments.

No sentence matching this reading cue was found in the 5 readable filings screened.
View offering documents screened (5)
424B3 · 2025-08-27S-1 · 2025-08-18424B5 · 2023-12-28424B5 · 2023-12-27424B5 · 2023-06-02

Extraction boundary: wording can be incomplete, duplicated, conditional or superseded by later filings. The system does not calculate proceeds, share counts, dilution or closing status from these excerpts. Verify every term in the linked official SEC filing.

OFFICIAL SEC SUBMISSIONS

Captured filing chronology

Open Evidence Snapshot →
  1. 8-K
    Reporting & material eventsOpen SEC filing →
  2. 8-K
    Reporting & material eventsOpen SEC filing →
  3. 8-K
    Reporting & material eventsOpen SEC filing →
  4. 10-Q
    Reporting & material eventsOpen SEC filing →
  5. 8-K
    Reporting & material eventsOpen SEC filing →
  6. 8-K
    Reporting & material eventsOpen SEC filing →
  7. 8-K
    Reporting & material eventsOpen SEC filing →
  8. 8-K
    Reporting & material eventsOpen SEC filing →
  9. DEF 14A
    GovernanceOpen SEC filing →
  10. 8-K
    Reporting & material eventsOpen SEC filing →
  11. 8-K
    Reporting & material eventsOpen SEC filing →
  12. EFFECT
    Registration & offeringOpen SEC filing →
  13. 424B3
    Registration & offeringOpen SEC filing →
  14. 8-K
    Reporting & material eventsOpen SEC filing →
  15. S-1
    Registration & offeringOpen SEC filing →
  16. 8-K
    Reporting & material eventsOpen SEC filing →
  17. 10-Q
    Reporting & material eventsOpen SEC filing →
  18. 8-K
    Reporting & material eventsOpen SEC filing →
  19. 8-K
    Reporting & material eventsOpen SEC filing →
  20. 8-K
    Reporting & material eventsOpen SEC filing →
  21. 10-Q
    Reporting & material eventsOpen SEC filing →
  22. 10-K
    Reporting & material eventsOpen SEC filing →
  23. 8-K
    Reporting & material eventsOpen SEC filing →
  24. 8-K
    Reporting & material eventsOpen SEC filing →
  25. 8-K
    Reporting & material eventsOpen SEC filing →
  26. 4
    OwnershipOpen SEC filing →
  27. 3
    OwnershipOpen SEC filing →
  28. 3
    OwnershipOpen SEC filing →
  29. 3
    OwnershipOpen SEC filing →
  30. 3
    OwnershipOpen SEC filing →
  31. 3
    OwnershipOpen SEC filing →
  32. 3
    OwnershipOpen SEC filing →
  33. 8-K
    Reporting & material eventsOpen SEC filing →
  34. 8-K
    Reporting & material eventsOpen SEC filing →
  35. 10-Q
    Reporting & material eventsOpen SEC filing →
  36. 8-K/A
    Reporting & material eventsOpen SEC filing →
  37. DEF 14A
    GovernanceOpen SEC filing →
  38. 8-K
    Reporting & material eventsOpen SEC filing →
  39. 8-K
    Reporting & material eventsOpen SEC filing →
  40. 8-K
    Reporting & material eventsOpen SEC filing →
  41. 8-K
    Reporting & material eventsOpen SEC filing →
  42. 8-K
    Reporting & material eventsOpen SEC filing →
  43. 8-K
    Reporting & material eventsOpen SEC filing →
  44. 8-K
    Reporting & material eventsOpen SEC filing →
  45. 10-Q
    Reporting & material eventsOpen SEC filing →
  46. 10-Q
    Reporting & material eventsOpen SEC filing →
  47. 8-K/A
    Reporting & material eventsOpen SEC filing →
  48. 8-K
    Reporting & material eventsOpen SEC filing →
  49. 8-K
    Reporting & material eventsOpen SEC filing →
  50. 8-K
    Reporting & material eventsOpen SEC filing →
  51. 8-K
    Reporting & material eventsOpen SEC filing →
  52. 10-K
    Reporting & material eventsOpen SEC filing →
  53. 8-K
    Reporting & material eventsOpen SEC filing →
  54. 8-K
    Reporting & material eventsOpen SEC filing →
  55. 8-K
    Reporting & material eventsOpen SEC filing →
  56. 8-K
    Reporting & material eventsOpen SEC filing →
  57. 8-K
    Reporting & material eventsOpen SEC filing →
  58. 8-K
    Reporting & material eventsOpen SEC filing →
  59. 8-K
    Reporting & material eventsOpen SEC filing →
  60. 8-K
    Reporting & material eventsOpen SEC filing →
Evidence boundary

Only official SEC submission-index facts are automated here. The brief does not determine shell status, beneficial ownership, capitalization, legal compliance, valuation, active-trading status or transaction suitability. Those questions require the appropriate source documents and independently retained professionals.