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

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Filing timeline

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SEC submissions · retrieved 2026-10-22 · 8029 issuers; up to 32 recent company reports and 8 ownership-change filings per issuer

  1. 8-K · Current report

    Report date 2026-09-21 · 0001171843-26-006175 · Items 5.02

  2. 4 · Ownership change

    Report date 2026-09-04 · 0002153871-26-000002

  3. 8-K · Current report

    Report date 2026-09-04 · 0001171843-26-005919 · Items 5.02,7.01,9.01

  4. 4 · Ownership change

    Report date 2026-09-01 · 0001258554-26-000005

  5. 4 · Ownership change

    Report date 2026-09-01 · 0001960551-26-000001

  6. 4 · Ownership change

    Report date 2026-09-01 · 0001791493-26-000001

  7. 4 · Ownership change

    Report date 2026-09-01 · 0001791477-26-000001

  8. 4 · Ownership change

    Report date 2026-09-01 · 0001562252-26-000001

  9. 4 · Ownership change

    Report date 2026-09-01 · 0001309741-26-000001

  10. 4 · Ownership change

    Report date 2026-09-01 · 0001302082-26-000001

  11. 10-Q · Quarterly report

    Report date 2026-05-31 · 0001171843-26-004548

  12. 8-K · Current report

    Report date 2026-07-09 · 0001171843-26-004547 · Items 2.02,9.01

  13. 8-K · Current report

    Report date 2026-04-24 · 0001171843-26-002704 · Items 8.01

  14. 10-Q · Quarterly report

    Report date 2026-02-28 · 0001171843-26-002340

  15. 8-K · Current report

    Report date 2026-04-09 · 0001171843-26-002339 · Items 2.02,9.01

  16. 8-K · Current report

    Report date 2026-01-16 · 0001171843-26-000314 · Items 5.07

  17. 10-Q · Quarterly report

    Report date 2025-11-30 · 0001171843-26-000136

  18. 8-K · Current report

    Report date 2026-01-08 · 0001171843-26-000135 · Items 2.02,9.01

  19. 8-K · Current report

    Report date 2025-12-18 · 0001171843-25-008020 · Items 1.01,9.01

  20. DEF 14A · Proxy statement

    Report date 2026-01-16 · 0001171843-25-007669

  21. 10-K · Annual report

    Report date 2025-08-31 · 0001171843-25-007481

  22. 8-K · Current report

    Report date 2025-11-18 · 0001171843-25-007399 · Items 2.02,9.01

  23. 10-Q · Quarterly report

    Report date 2025-05-31 · 0001171843-25-004413

  24. 8-K · Current report

    Report date 2025-07-10 · 0001171843-25-004410 · Items 2.02,9.01

  25. 10-Q · Quarterly report

    Report date 2025-02-28 · 0001171843-25-002130

  26. 8-K · Current report

    Report date 2025-04-10 · 0001171843-25-002129 · Items 2.02,9.01

  27. 8-K · Current report

    Report date 2025-01-17 · 0001171843-25-000318 · Items 5.07

  28. 10-Q · Quarterly report

    Report date 2024-11-30 · 0001171843-25-000165

  29. 8-K · Current report

    Report date 2025-01-08 · 0001171843-25-000134 · Items 2.02,9.01

  30. DEF 14A · Proxy statement

    Report date 2024-11-02 · 0001171843-24-006642

  31. 10-K · Annual report

    Report date 2024-08-31 · 0001171843-24-006440

  32. 8-K · Current report

    Report date 2024-11-19 · 0001171843-24-006439 · Items 2.02,9.01

  33. SC 13G/A · Ownership disclosure

    0001398344-24-020732

  34. SC 13G/A · Ownership disclosure

    0000932471-24-001173

  35. SC 13G/A · Ownership disclosure

    0000932471-24-000581

  36. SC 13D/A · Ownership disclosure

    0001140361-24-040129

  37. SC 13G · Ownership disclosure

    0000919574-24-004253

  38. 10-Q · Quarterly report

    Report date 2024-05-31 · 0001171843-24-003883

  39. 8-K · Current report

    Report date 2024-07-11 · 0001171843-24-003882 · Items 2.02,9.01

  40. 8-K · Current report

    Report date 2024-04-11 · 0001171843-24-001956 · Items 2.02,9.01

Reported insider transactions

Download transactions CSV

SEC insider transactions · retrieved 2026-10-15 · 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: 3 transaction rows3SGrant / award: 11 transaction rows11AExercise / conversion: 6 transaction rows6MTax / exercise payment: 1 transaction rows1FGift: 0 transaction rows0G
P · PurchaseS · SaleA · Grant / awardM · Exercise / conversionF · Tax / exercise paymentG · Gift

25 matching transaction rows.

Transaction / filedReporting ownerTypeSecuritySharesReported price
2026-09-04
2026-09-09
Ramdas GautamA · Grant / award
Acquired
Common Stock43805.00.0
2026-09-04
2026-09-09
Ramdas GautamA · Grant / award
Acquired
Stock Option (right to buy)
Derivative security
15278.00.0
2026-09-01
2026-09-03
Pinho Cristina Lucia DuarteA · Grant / award
Acquired
Common Stock6188.00.0
2026-09-01
2026-09-03
Kemp Sarah E.A · Grant / award
Acquired
Common Stock6188.00.0
2026-09-01
2026-09-03
Calderon Nancy E.A · Grant / award
Acquired
Common Stock6188.00.0
2026-09-01
2026-09-03
von Falkenhausen KonstantinA · Grant / award
Acquired
Stock Option (right to buy)
Derivative security
15044.00.0
2026-09-01
2026-09-03
Narayan RamaniA · Grant / award
Acquired
Stock Option (right to buy)
Derivative security
15044.00.0
2026-09-01
2026-09-03
Lee SunggyuA · Grant / award
Acquired
Common Stock6188.00.0
2026-09-01
2026-09-03
WOLSFELD MATTHEW CA · Grant / award
Acquired
Stock Option (right to buy)
Derivative security
29755.00.0
2026-09-01
2026-09-04
LYNCH G PATRICKA · Grant / award
Acquired
Stock Option (right to buy)
Derivative security
40257.00.0
2026-09-01
2026-09-03
NIGON RICHARDA · Grant / award
Acquired
Common Stock7426.00.0
2026-07-30
2026-07-31
LYNCH G PATRICKS · Sale
Disposed
Common Stock16070.08.0
2026-07-29
2026-07-31
LYNCH G PATRICKS · Sale
Disposed
Common Stock2.08.1
2026-07-29
2026-07-31
LYNCH G PATRICKM · Exercise / conversion
Acquired
Common Stock16072.06.7
2026-07-29
2026-07-31
LYNCH G PATRICKM · Exercise / conversion
Disposed
Stock Option (right to buy)
Derivative security
16072.00.0
2026-07-20
2026-07-21
NIGON RICHARDM · Exercise / conversion
Acquired
Common Stock12000.06.7
2026-07-20
2026-07-21
NIGON RICHARDS · Sale
Disposed
Common Stock12000.08.0
2026-07-20
2026-07-21
NIGON RICHARDM · Exercise / conversion
Disposed
Stock Option (right to buy)
Derivative security
12000.00.0
2026-07-01
2026-07-02
WOLSFELD MATTHEW CM · Exercise / conversion
Acquired
Common Stock11879.06.7
2026-07-01
2026-07-02
WOLSFELD MATTHEW CF · Tax / exercise payment
Disposed
Common Stock9169.08.68
2026-07-01
2026-07-02
WOLSFELD MATTHEW CM · Exercise / conversion
Disposed
Stock Option (right to buy)
Derivative security
11879.00.0
2026-02-11
2026-09-03
Calderon Nancy E.L · Other (see filing)
Acquired
Common Stock2.538.66
2026-02-11
2026-09-03
Calderon Nancy E.L · Other (see filing)
Acquired
Common Stock2.378.66
2025-11-12
2026-09-03
Calderon Nancy E.L · Other (see filing)
Acquired
Common Stock2.78.12
2025-11-12
2026-09-03
Calderon Nancy E.L · Other (see filing)
Acquired
Common Stock2.528.12

Identity & relationships

Wikidata structured data · retrieved 2026-10-15 · 1663 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 · 0000875582NORTHERN TECHNOLOGIES INTERNATIONAL 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 2026-10-15 · 1199 checked identities; 0 unavailable records

Search names and former names

    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
    2025-08-31$84.23M$88.91M
    2024-08-31$85.06M$92.17M
    2023-08-31$79.90M$89.33M
    2022-08-31$74.16M$87.40M
    2021-08-31$56.49M$71.70M
    2020-08-31$47.64M$62.28M
    2019-08-31$55.75M$73.95M
    2018-08-31$51.42M$69.51M

    Bureau of Labor Statistics · retrieved 2026-10-22 · 9 selected series; gaps remain missing

    Explore the CPI history ↗