A business in context

QSJC research notebook

Read the disclosures. Follow the relationships. Keep the dates in view.

Research JSON

Filing timeline

Download filings CSV

SEC submissions · retrieved 2026-09-08 · 8005 issuers; up to 32 recent company reports and 8 ownership-change filings per issuer

  1. 10-Q · Quarterly report

    Report date 2026-06-30 · 0001683168-26-006485

  2. 10-Q · Quarterly report

    Report date 2026-03-31 · 0001683168-26-003973

  3. 10-K · Annual report

    Report date 2025-12-31 · 0001683168-26-002488

  4. 8-K · Current report

    Report date 2026-02-27 · 0001683168-26-001381 · Items 4.01,9.01

  5. 10-Q · Quarterly report

    Report date 2025-09-30 · 0001683168-25-008383

  6. 10-Q · Quarterly report

    Report date 2025-06-30 · 0001683168-25-006089

  7. 10-Q · Quarterly report

    Report date 2025-03-31 · 0001683168-25-003492

  8. 10-K · Annual report

    Report date 2024-12-31 · 0001683168-25-001892

  9. 10-Q · Quarterly report

    Report date 2024-09-30 · 0001683168-24-008012

  10. 10-Q · Quarterly report

    Report date 2024-06-30 · 0001683168-24-005687

  11. 10-Q · Quarterly report

    Report date 2024-03-31 · 0001683168-24-003439

  12. SC 13G · Ownership disclosure

    0001683168-24-002104

  13. SC 13G · Ownership disclosure

    0001683168-24-002102

  14. 10-K · Annual report

    Report date 2023-12-31 · 0001683168-24-001846

  15. 10-Q · Quarterly report

    Report date 2023-09-30 · 0001683168-23-007981

  16. 8-K/A · Current report

    Report date 2023-10-12 · 0001683168-23-007910 · Items 5.02

  17. 8-K · Current report

    Report date 2023-10-12 · 0001683168-23-007086 · Items 5.02

  18. 10-Q · Quarterly report

    Report date 2023-06-30 · 0001683168-23-005661

  19. 10-Q · Quarterly report

    Report date 2023-03-31 · 0001683168-23-003329

  20. 8-K · Current report

    Report date 2023-04-11 · 0001683168-23-002569 · Items 5.07,9.01

  21. 8-K · Current report

    Report date 2023-03-20 · 0001683168-23-001715 · Items 1.01,2.01,5.05,5.06,9.01

  22. 10-Q · Quarterly report

    Report date 2022-10-31 · 0001683168-22-008436

  23. 8-K · Current report

    Report date 2022-10-17 · 0001683168-22-008375 · Items 5.07,9.01

  24. 8-K · Current report

    Report date 2022-12-09 · 0001683168-22-008355 · Items 4.01,9.01

  25. 10-K · Annual report

    Report date 2022-07-31 · 0001753391-22-000019

  26. 8-K · Current report

    Report date 2022-08-31 · 0001753391-22-000014 · Items 1.01,5.01,9.01

  27. 10-Q · Quarterly report

    Report date 2022-04-30 · 0001753391-22-000008

  28. 10-Q · Quarterly report

    Report date 2022-01-31 · 0001753391-22-000006

  29. 10-Q · Quarterly report

    Report date 2021-10-31 · 0001753391-21-000013

  30. 10-K · Annual report

    Report date 2021-07-31 · 0001753391-21-000010

  31. 10-Q · Quarterly report

    Report date 2021-04-30 · 0001753391-21-000005

  32. 10-Q · Quarterly report

    Report date 2021-01-31 · 0001753391-21-000002

Reported insider transactions

Download transactions CSV

SEC insider transactions · retrieved 2026-09-07 · 2026 Q2: filings in this completed quarter; not a live transaction feed

Purchases and sales include open-market or private transactions. Grants, exercises and tax withholding are shown separately. Amendments and joint reports can overlap; rows are not a net-buying score. Prices retain the filing's units; consult its footnotes.

Transaction rows by code · counts, not monetary totals
Purchase: 0 transaction rows0PSale: 0 transaction rows0SGrant / award: 0 transaction rows0AExercise / conversion: 0 transaction rows0MTax / exercise payment: 0 transaction rows0FGift: 0 transaction rows0G
P · PurchaseS · SaleA · Grant / awardM · Exercise / conversionF · Tax / exercise paymentG · Gift

0 matching transaction rows.

No matching transaction rows in the covered quarter. This does not establish that no insider transactions occurred.

Identity & relationships

Wikidata structured data · retrieved 2026-09-07 · 1611 unambiguous CIK-linked entities; coverage is incomplete

These are sourced identity and relationship claims, with incomplete coverage. Headquarters locations do not describe sales, assets or operating exposure.

SEC issuer · 0001753391TANCHENG GROUP CO., LTD.

No parent relationship is available in this import; this is not proof of independence.

No verified LEI join available.

GLEIF legal entity reference data · retrieved 2026-09-07 · 1177 checked identities; 0 unavailable records

Search names and former names
  • BIGEON CORP. · former SEC name · 2018-12-14 to 2022-12-12

Revenue in constant purchasing power

USD revenue expressed in 2026-07 consumer-price dollars. Each annual period uses a CPI-U average weighted by the days in its actual reporting interval. This is a purchasing-power comparison, not a company-specific price or volume measure.

Year endedReported USD revenueCPI-adjusted USD revenue
2024-12-31$502.6K$534.9K
2023-12-31$1.97M$2.16M
2022-12-31$590.3K$673.4K
2020-07-31$0$0
2019-07-31$0$0
2018-07-31$0$0

Bureau of Labor Statistics · retrieved 2026-09-08 · 9 selected series; gaps remain missing

Explore the CPI history ↗