A business in context

GCTS research notebook

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

Research JSON

Filing timeline

Download filings CSV

SEC submissions · retrieved 2026-10-07 · 8016 issuers; up to 32 recent company reports and 8 ownership-change filings per issuer

  1. 4 · Ownership change

    Report date 2026-09-30 · 0000929638-26-003842

  2. 4 · Ownership change

    Report date 2026-09-30 · 0000929638-26-003840

  3. 4 · Ownership change

    Report date 2026-09-30 · 0000929638-26-003838

  4. 4 · Ownership change

    Report date 2026-09-30 · 0000929638-26-003836

  5. 4 · Ownership change

    Report date 2026-09-30 · 0000929638-26-003834

  6. 4 · Ownership change

    Report date 2026-09-30 · 0000929638-26-003832

  7. 8-K · Current report

    Report date 2026-09-17 · 0000929638-26-003573 · Items 5.07

  8. 8-K · Current report

    Report date 2026-09-10 · 0000929638-26-003539 · Items 5.02

  9. 4 · Ownership change

    Report date 2026-09-10 · 0000929638-26-003526

  10. 4 · Ownership change

    Report date 2026-09-10 · 0000929638-26-003525

  11. 10-Q · Quarterly report

    Report date 2026-06-30 · 0001193125-26-342564

  12. 8-K · Current report

    Report date 2026-08-10 · 0000929638-26-002965 · Items 2.02,9.01

  13. DEF 14A · Proxy statement

    Report date 2026-09-17 · 0001193125-26-330575

  14. 8-K/A · Current report

    Report date 2026-06-18 · 0000929638-26-002285 · Items 8.01,9.01

  15. 8-K · Current report

    Report date 2026-06-18 · 0000929638-26-002281 · Items 2.02,9.01

  16. 10-Q · Quarterly report

    Report date 2026-03-31 · 0001193125-26-219536

  17. 8-K · Current report

    Report date 2026-05-12 · 0000929638-26-001816 · Items 2.02,9.01

  18. 10-K · Annual report

    Report date 2025-12-31 · 0001193125-26-124183

  19. 8-K · Current report

    Report date 2026-03-25 · 0000929638-26-001149 · Items 2.02,9.01

  20. 8-K · Current report

    Report date 2026-02-24 · 0000929638-26-000748 · Items 1.01,9.01

  21. 8-K · Current report

    Report date 2026-01-29 · 0000929638-26-000390 · Items 8.01,9.01

  22. 8-K · Current report

    Report date 2025-12-15 · 0000929638-25-004601 · Items 1.01,2.03,9.01

  23. 10-Q · Quarterly report

    Report date 2025-09-30 · 0001193125-25-277777

  24. 8-K · Current report

    Report date 2025-11-12 · 0000929638-25-004231 · Items 2.02,9.01

  25. 8-K · Current report

    Report date 2025-09-18 · 0000929638-25-003527 · Items 5.07

  26. 8-K · Current report

    Report date 2025-09-10 · 0000929638-25-003426 · Items 1.01,2.03,8.01,9.01

  27. 10-Q · Quarterly report

    Report date 2025-06-30 · 0001851961-25-000010

  28. 8-K · Current report

    Report date 2025-08-12 · 0000929638-25-002962 · Items 2.02,9.01

  29. DEF 14A · Proxy statement

    Report date 2025-09-18 · 0000950170-25-102009

  30. 8-K · Current report

    Report date 2025-06-06 · 0000929638-25-002185 · Items 8.01

  31. 8-K · Current report

    Report date 2025-05-15 · 0001104659-25-049992 · Items 1.01,8.01,9.01

  32. 10-Q · Quarterly report

    Report date 2025-03-31 · 0000950170-25-071424

  33. 8-K · Current report

    Report date 2025-05-14 · 0000929638-25-001868 · Items 2.02,9.01

  34. 8-K · Current report

    Report date 2025-04-16 · 0000929638-25-001567 · Items 8.01,9.01

  35. 10-K · Annual report

    Report date 2024-12-31 · 0000950170-25-044438

  36. 8-K · Current report

    Report date 2025-03-25 · 0000929638-25-001242 · Items 2.02,9.01

  37. 8-K · Current report

    Report date 2025-01-24 · 0000929638-25-000430 · Items 1.01

  38. SC 13G/A · Ownership disclosure

    0001011438-24-000678

  39. 10-Q · Quarterly report

    Report date 2024-09-30 · 0000950170-24-127082

  40. 8-K · Current report

    Report date 2024-11-14 · 0000950170-24-127069 · Items 2.02,9.01

Reported insider transactions

Download transactions CSV

SEC insider transactions · retrieved 2026-10-07 · 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: 6 transaction rows6AExercise / conversion: 0 transaction rows0MTax / exercise payment: 0 transaction rows0FGift: 0 transaction rows0G
P · PurchaseS · SaleA · Grant / awardM · Exercise / conversionF · Tax / exercise paymentG · Gift

6 matching transaction rows.

Transaction / filedReporting ownerTypeSecuritySharesReported price
2026-03-31
2026-04-02
TUDER JEFFREYA · Grant / award
Acquired
Common Stock24122.00.0
2026-03-31
2026-04-02
Lee KyeonghoA · Grant / award
Acquired
Common Stock24122.00.0
2026-03-31
2026-04-02
Chan NelsonA · Grant / award
Acquired
Common Stock24122.00.0
2026-03-31
2026-04-02
Chun KukjinA · Grant / award
Acquired
Common Stock24122.00.0
2026-03-31
2026-04-02
Barker RobertA · Grant / award
Acquired
Common Stock24122.00.0
2026-03-31
2026-04-02
Shin HyunsooA · Grant / award
Acquired
Common Stock24122.00.0

Identity & relationships

Wikidata structured data · retrieved 2026-10-07 · 1614 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 · 0001851961GCT Semiconductor Holding, Inc.

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 2026-10-07 · 1179 checked identities; 0 unavailable records

Search names and former names
  • Concord Acquisition Corp III · former SEC name · 2021-03-26 to 2024-03-28

Revenue in constant purchasing power

USD revenue expressed in 2026-08 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$9.13M$9.75M
2023-12-31$16.03M$17.62M

Bureau of Labor Statistics · retrieved 2026-10-07 · 9 selected series; gaps remain missing

Explore the CPI history ↗