Insider · CIK 0001986259

Tappin Matthew

CIK 0001986259 Name as filed on the most recent filing

Filed as Tappin Matthew (18)

21 transaction lines · from 18 filings · filed 2024-01-03 to 2026-07-02 The span is the filing dates this catalog holds, not the entity's full filing history. Absence here is not evidence of absence at the SEC.

How this page attributes a trade

A line appears here when the filing that carries it names this CIK as a reporting owner, not only when the parser picked this CIK as the line's primary owner. That is why a joint filing appears on both owners' pages rather than vanishing from the second one. The catalog never merges two CIKs into one person and never splits one CIK into two: identity here is the SEC's own identifier and nothing else.

01

Issuers this insider has filed against

Ordered by last-seen filing date, newest first. Roles are as filed on the Form 4 and are not normalised.

Fault

This container could not be filled from the store. It is showing nothing because a read failed, not because no insider filed: those are different facts and this catalog will not let one stand in for the other. The last ingest the store recorded was 2026-08-22 05:23 UTC.

No issuer is recorded

The catalog holds no filing linking this CIK to an issuer.

02

Transactions

Every stored Form 4 line naming this reporting owner, newest transaction date first. Each row links to the filing it came from.

21 transactions · Newest transaction date first, id breaking the tie.

Fault

This container could not be filled from the store. It is showing nothing because a read failed, not because no insider filed: those are different facts and this catalog will not let one stand in for the other. The last ingest the store recorded was 2026-08-22 05:23 UTC.

Transactions filed by this insider
Direction Date Code Company Value USD Filing
2026-07-02 S, Open-market sale Stem, Inc.STEM 7,819, disposed Open Form 4 filing 0001986259-26-000014
2026-03-11 S, Open-market sale Stem, Inc.STEM 4,354, disposed Open Form 4 filing 0001758766-26-000027
2026-03-10 S, Open-market sale Stem, Inc.STEM 7,284, disposed Open Form 4 filing 0001986259-26-000012
2026-03-04 S, Open-market sale Stem, Inc.STEM 1,850, disposed Open Form 4 filing 0001986259-26-000010
2026-03-03 S, Open-market sale Stem, Inc.STEM 2,901, disposed Open Form 4 filing 0001986259-26-000010
2026-02-20 S, Open-market sale Stem, Inc.STEM 4,172, disposed Open Form 4 filing 0001986259-26-000006
2025-11-11 S, Open-market sale Stem, Inc.STEM 169,637, disposed Open Form 4 filing 0001986259-25-000007
2025-06-16 S, Open-market sale Stem, Inc.STEM 9,370, disposed Open Form 4 filing 0000950170-25-088043
2025-05-30 S, Open-market sale Stem, Inc.STEM 525, disposed Open Form 4 filing 0000950170-25-088043
2025-03-12 S, Open-market sale Stem, Inc.STEM 5,280, disposed Open Form 4 filing 0000950170-25-040338
2025-03-07 S, Open-market sale Stem, Inc.STEM 2,365, disposed Open Form 4 filing 0000950170-25-040338
2025-02-20 S, Open-market sale Stem, Inc.STEM 5,095, disposed Open Form 4 filing 0000950170-25-025173
2024-05-28 S, Open-market sale Stem, Inc.STEM 1,832, disposed Open Form 4 filing 0001758766-24-000118
2024-03-19 S, Open-market sale Stem, Inc.STEM 48,485, disposed Open Form 4 filing 0001758766-24-000059
2024-03-08 S, Open-market sale Stem, Inc.STEM 54,529, disposed Open Form 4 filing 0001758766-24-000044
2024-03-05 S, Open-market sale Stem, Inc.STEM 9,247, disposed Open Form 4 filing 0001758766-24-000043
2024-03-04 S, Open-market sale Stem, Inc.STEM 14,196, disposed Open Form 4 filing 0001758766-24-000041
2024-02-20 S, Open-market sale Stem, Inc.STEM 20,914, disposed Open Form 4 filing 0001758766-24-000021
2024-02-16 S, Open-market sale Stem, Inc.STEM 33,608, disposed Open Form 4 filing 0001758766-24-000013
2024-02-14 S, Open-market sale Stem, Inc.STEM 14,351, disposed Open Form 4 filing 0001758766-24-000008
2024-01-03 S, Open-market sale Stem, Inc.STEM 18,537, disposed Open Form 4 filing 0001758766-24-000002

This column is intentionally blank

No transaction line is stored for this reporting owner, though the catalog holds filings naming them. That happens when the filings report only holdings or only positions the store does not carry, and when a parse failed; each filing page states its own parse status.

Codes on this page
S, Open-market sale
Open-market sale
Relationships on this page
O, Officer
Officer

Every value is as reported on the Form 4, totalled to the dollar. Share counts, the price per share and the full list of reporting owners are on each filing's own page, which every row here opens.

What this insider's stored lines contain

Exact counts over every stored line for this entity. This is a statement of composition, not a filter: the only filter this page offers is the open-market one above, because that is the only one an index serves today.

  • Open-market purchase 0
  • Open-market sale 21
  • Option exercise 0
  • Grant or award 0
  • Tax withholding 0
  • Disposition to the issuer 0
  • In-the-money option exercise 0

How to cite this page

ebomi catalog. Tappin Matthew, insider transactions. Retrieved 2026-08-23 from https://ebomi.com/insider/0001986259

Balogh, A. Insider trading. Scientific Data 10, 237 (2023) doi:10.1038/s41597-023-02147-6

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