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KOSS research notebook

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Filing timeline

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SEC submissions · retrieved 2026-10-23 · 8022 issuers; up to 32 recent company reports and 8 ownership-change filings per issuer

  1. 8-K · Current report

    Report date 2026-10-14 · 0000056701-26-000041 · Items 5.07

  2. DEF 14A · Proxy statement

    Report date 2026-08-27 · 0000056701-26-000036

  3. 10-K · Annual report

    Report date 2026-06-30 · 0000056701-26-000034

  4. 8-K · Current report

    Report date 2026-08-27 · 0000056701-26-000032 · Items 2.02,9.01

  5. 4 · Ownership change

    Report date 2026-05-06 · 0001193125-26-214741

  6. 4 · Ownership change

    Report date 2026-05-06 · 0001193125-26-214740

  7. 10-Q · Quarterly report

    Report date 2026-03-31 · 0000056701-26-000017

  8. 8-K · Current report

    Report date 2026-05-07 · 0000056701-26-000015 · Items 2.02,9.01

  9. 4 · Ownership change

    Report date 2026-02-17 · 0001193125-26-054822

  10. 10-Q · Quarterly report

    Report date 2025-12-31 · 0000056701-26-000008

  11. 8-K · Current report

    Report date 2026-01-29 · 0000056701-26-000006 · Items 2.02,9.01

  12. 4 · Ownership change

    Report date 2025-12-02 · 0001193125-25-308136

  13. 10-Q · Quarterly report

    Report date 2025-09-30 · 0000056701-25-000059

  14. 8-K · Current report

    Report date 2025-10-30 · 0000056701-25-000057 · Items 2.02,9.01

  15. 8-K · Current report

    Report date 2025-10-15 · 0000056701-25-000052 · Items 5.07

  16. DEF 14A · Proxy statement

    Report date 2025-08-28 · 0000056701-25-000046

  17. 10-K · Annual report

    Report date 2025-06-30 · 0000056701-25-000044

  18. 8-K · Current report

    Report date 2025-08-28 · 0000056701-25-000042 · Items 2.02,9.01

  19. 4 · Ownership change

    Report date 2025-06-10 · 0000950170-25-087506

  20. 4 · Ownership change

    Report date 2025-06-12 · 0000950170-25-087503

  21. 10-Q · Quarterly report

    Report date 2025-03-31 · 0000056701-25-000017

  22. 8-K · Current report

    Report date 2025-05-06 · 0000898432-25-000322 · Items 5.02

  23. 8-K · Current report

    Report date 2025-05-08 · 0000056701-25-000015 · Items 2.02,9.01

  24. 10-Q · Quarterly report

    Report date 2024-12-31 · 0000056701-25-000008

  25. 8-K · Current report

    Report date 2025-01-30 · 0000056701-25-000006 · Items 2.02,9.01

  26. 4 · Ownership change

    Report date 2024-12-12 · 0000950170-24-136638

  27. 10-Q · Quarterly report

    Report date 2024-09-30 · 0000056701-24-000043

  28. 8-K · Current report

    Report date 2024-10-31 · 0000056701-24-000041 · Items 2.02,9.01

  29. 8-K · Current report

    Report date 2024-10-16 · 0000056701-24-000036 · Items 5.07

  30. DEF 14A · Proxy statement

    Report date 2024-08-29 · 0000056701-24-000030

  31. 10-K · Annual report

    Report date 2024-06-30 · 0000056701-24-000028

  32. 8-K · Current report

    Report date 2024-08-29 · 0000056701-24-000026 · Items 2.02,9.01

  33. 4 · Ownership change

    Report date 2024-05-30 · 0000950170-24-067352

  34. 10-Q · Quarterly report

    Report date 2024-03-31 · 0000056701-24-000014

  35. 8-K · Current report

    Report date 2024-05-09 · 0000056701-24-000012 · Items 2.02,9.01

  36. 10-Q · Quarterly report

    Report date 2023-12-31 · 0000056701-24-000008

  37. 8-K · Current report

    Report date 2024-02-01 · 0000056701-24-000006 · Items 2.02,9.01

  38. 10-Q · Quarterly report

    Report date 2023-09-30 · 0000056701-23-000044

  39. 8-K · Current report

    Report date 2023-10-26 · 0000056701-23-000042 · Items 2.02,9.01

  40. 8-K/A · Current report

    Report date 2023-10-18 · 0000056701-23-000037 · Items 5.02,5.07,9.01

Reported insider transactions

Download transactions CSV

SEC insider transactions · retrieved 2026-10-23 · 2026 Q3: 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 2026-10-23 · 1658 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 · 0000056701KOSS CORP

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 2026-10-23 · 1197 checked identities; 0 unavailable records

Search names and former names

View Wikidata identity and references ↗

  • Koss Corporation · alias · wikidata
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Revenue in constant purchasing power

USD revenue expressed in 2026-09 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
2025-06-30$12.62M$13.39M
2024-06-30$12.27M$13.35M
2023-06-30$13.10M$14.73M
2022-06-30$17.71M$21.16M
2021-06-30$19.55M$25.03M
2020-06-30$18.31M$23.99M
2019-06-30$21.84M$29.06M
2018-06-30$23.52M$31.94M

Bureau of Labor Statistics · retrieved 2026-10-23 · 9 selected series; gaps remain missing

Explore the CPI history ↗