A business in context

AMPX research notebook

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

Research JSON

Filing timeline

Download filings CSV

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

  1. 8-K · Current report

    Report date 2026-09-23 · 0001899287-26-000065 · Items 1.01,9.01

  2. 4 · Ownership change

    Report date 2026-08-21 · 0002067233-26-000019

  3. 4 · Ownership change

    Report date 2026-08-21 · 0001940928-26-000024

  4. 4 · Ownership change

    Report date 2026-08-21 · 0001476220-26-000034

  5. 8-K · Current report

    Report date 2026-08-07 · 0001899287-26-000062 · Items 1.01,2.03,9.01

  6. 10-Q · Quarterly report

    Report date 2026-06-30 · 0001899287-26-000059

  7. 8-K · Current report

    Report date 2026-08-04 · 0001899287-26-000056 · Items 2.02,9.01

  8. 8-K · Current report

    Report date 2026-06-11 · 0001899287-26-000053 · Items 5.07

  9. 4 · Ownership change

    Report date 2026-06-12 · 0001517394-26-000003

  10. 4 · Ownership change

    Report date 2026-06-12 · 0001296381-26-000005

  11. 4 · Ownership change

    Report date 2026-06-12 · 0001230569-26-000005

  12. 4 · Ownership change

    Report date 2026-06-12 · 0001045434-26-000009

  13. 4 · Ownership change

    Report date 2026-06-09 · 0001045434-26-000007

  14. 8-K/A · Current report

    Report date 2026-05-06 · 0001899287-26-000051 · Items 3.02

  15. 8-K · Current report

    Report date 2026-05-06 · 0001899287-26-000047 · Items 1.01,3.02,9.01

  16. 10-Q · Quarterly report

    Report date 2026-03-31 · 0001899287-26-000045

  17. 8-K · Current report

    Report date 2026-05-06 · 0001899287-26-000037 · Items 2.02,9.01

  18. DEF 14A · Proxy statement

    Report date 2026-06-11 · 0001899287-26-000026

  19. 8-K · Current report

    Report date 2026-04-17 · 0001899287-26-000022 · Items 4.01

  20. 10-K · Annual report

    Report date 2025-12-31 · 0001899287-26-000015

  21. 8-K · Current report

    Report date 2026-03-04 · 0001899287-26-000009 · Items 2.02,9.01

  22. 8-K · Current report

    Report date 2026-01-30 · 0001899287-26-000005 · Items 1.02

  23. 8-K · Current report

    Report date 2026-01-12 · 0001899287-26-000003 · Items 8.01

  24. 8-K · Current report

    Report date 2025-12-18 · 0001899287-25-000048 · Items 5.02

  25. 10-Q · Quarterly report

    Report date 2025-09-30 · 0001628280-25-050308

  26. 8-K · Current report

    Report date 2025-11-06 · 0001628280-25-050172 · Items 2.02,9.01

  27. 8-K · Current report

    Report date 2025-10-06 · 0001899287-25-000045 · Items 5.02

  28. 8-K · Current report

    Report date 2025-09-02 · 0001899287-25-000044 · Items 5.02

  29. 10-Q · Quarterly report

    Report date 2025-06-30 · 0001628280-25-038983

  30. 8-K · Current report

    Report date 2025-08-07 · 0001628280-25-038899 · Items 2.02,9.01

  31. 8-K · Current report

    Report date 2025-06-12 · 0001899287-25-000041 · Items 5.07

  32. 10-Q · Quarterly report

    Report date 2025-03-31 · 0001899287-25-000040

  33. 8-K · Current report

    Report date 2025-05-08 · 0001899287-25-000038 · Items 2.02,9.01

  34. DEF 14A · Proxy statement

    Report date 2025-06-12 · 0001899287-25-000026

  35. 8-K · Current report

    Report date 2025-04-22 · 0001899287-25-000020 · Items 5.02

  36. 10-K · Annual report

    Report date 2024-12-31 · 0001899287-25-000012

  37. 8-K · Current report

    Report date 2025-03-20 · 0001899287-25-000010 · Items 2.02,9.01

  38. 8-K · Current report

    Report date 2025-03-04 · 0001899287-25-000002 · Items 2.02,9.01

  39. 10-Q · Quarterly report

    Report date 2024-09-30 · 0001899287-24-000088

  40. 8-K · Current report

    Report date 2024-11-07 · 0001899287-24-000085 · Items 2.02,9.01

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: 4 transaction rows4SGrant / award: 1 transaction rows1AExercise / conversion: 0 transaction rows0MTax / exercise payment: 0 transaction rows0FGift: 4 transaction rows4G
P · PurchaseS · SaleA · Grant / awardM · Exercise / conversionF · Tax / exercise paymentG · Gift

9 matching transaction rows.

Transaction / filedReporting ownerTypeSecuritySharesReported price
2026-08-25
2026-08-25
Stepien Thomas MG · Gift
Disposed
Common stock5000.00.0
2026-08-25
2026-08-25
Stepien Thomas MG · Gift
Disposed
Common stock5000.00.0
2026-08-25
2026-08-25
Stepien Thomas MG · Gift
Disposed
Common stock5000.00.0
2026-08-25
2026-08-25
Stepien Thomas MG · Gift
Disposed
Common stock346.00.0
2026-08-25
2026-08-25
Stepien Thomas MA · Grant / award
Acquired
Common stock346.00.0
2026-08-24
2026-08-25
Stepien Thomas MS · Sale
Disposed
Common stock8000.010.03
2026-08-21
2026-08-25
Stepien Thomas MS · Sale
Disposed
Common stock23529.010.34
2026-08-21
2026-08-25
Stefan Constantin IonelS · Sale
Disposed
Common stock29681.010.34
2026-08-21
2026-08-25
Sun KangS · Sale
Disposed
Common stock62101.010.34

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 · 0001899287Amprius Technologies, 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 2026-10-23 · 1197 checked identities; 0 unavailable records

Search names and former names
  • Kensington Capital Acquisition Corp. IV · former SEC name · 2021-12-15 to 2022-09-14

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
2024-12-31$24.17M$25.96M
2023-12-31$9.05M$10.01M
2022-12-31$4.41M$5.08M
2021-12-31$2.77M$3.45M

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

Explore the CPI history ↗