Insider · CIK 0001257171

Chen Stephen T

CIK 0001257171 Name as filed on the most recent filing

Filed as Chen Stephen T (235)

543 transaction lines · from 235 filings · filed 2006-05-03 to 2020-10-13 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 2026-08-25 05:24 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.

543 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 2026-08-25 05:24 UTC.

Transactions filed by this insider
Direction Date Code Company Value USD Filing
2020-02-05 P, Open-market purchase Amarillo Biosciences IncAMAR 2 lines 523, acquired Open Form 4 filing 0001257171-20-000007
2020-01-31 P, Open-market purchase Amarillo Biosciences IncAMAR 750, acquired Open Form 4 filing 0001257171-20-000006
2020-01-29 P, Open-market purchase Amarillo Biosciences IncAMAR 780, acquired Open Form 4 filing 0001257171-20-000005
2020-01-27 P, Open-market purchase Amarillo Biosciences IncAMAR 270, acquired Open Form 4 filing 0001257171-20-000005
2020-01-21 P, Open-market purchase Amarillo Biosciences IncAMAR 330, acquired Open Form 4 filing 0001257171-20-000004
2020-01-13 P, Open-market purchase Amarillo Biosciences IncAMAR 780, acquired Open Form 4 filing 0001257171-20-000003
2020-01-09 P, Open-market purchase Amarillo Biosciences IncAMAR 520, acquired Open Form 4 filing 0001257171-20-000003
2020-01-06 P, Open-market purchase Amarillo Biosciences IncAMAR 1,000, acquired Open Form 4 filing 0001257171-20-000002
2020-01-03 P, Open-market purchase Amarillo Biosciences IncAMAR 2 lines 1,905, acquired Open Form 4 filing 0001257171-20-000002
2020-01-02 P, Open-market purchase Amarillo Biosciences IncAMAR 2 lines 1,450, acquired Open Form 4 filing 0001257171-20-000001
2019-12-31 P, Open-market purchase Amarillo Biosciences IncAMAR 2 lines 1,980, acquired Open Form 4 filing 0001257171-19-000071
2019-12-27 P, Open-market purchase Amarillo Biosciences IncAMAR 1,080, acquired Open Form 4 filing 0001257171-19-000070
2019-12-20 P, Open-market purchase Amarillo Biosciences IncAMAR 580, acquired Open Form 4 filing 0001257171-19-000069
2019-12-18 P, Open-market purchase Amarillo Biosciences IncAMAR 840, acquired Open Form 4 filing 0001257171-19-000068
2019-12-17 P, Open-market purchase Amarillo Biosciences IncAMAR 580, acquired Open Form 4 filing 0001257171-19-000068
2019-12-13 P, Open-market purchase Amarillo Biosciences IncAMAR 810, acquired Open Form 4 filing 0001257171-19-000067
2019-12-10 P, Open-market purchase Amarillo Biosciences IncAMAR 3 lines 1,383, acquired Open Form 4 filing 0001257171-19-000066
2019-12-10 P, Open-market purchase Amarillo Biosciences IncAMAR 3 lines 1,353, acquired Open Form 4 filing 0001257171-19-000065
2019-12-09 P, Open-market purchase Amarillo Biosciences IncAMAR 5 lines 2,975, acquired Open Form 4 filing 0001257171-19-000066
2019-12-09 P, Open-market purchase Amarillo Biosciences IncAMAR 5 lines 2,975, acquired Open Form 4 filing 0001257171-19-000065
2019-12-05 P, Open-market purchase Amarillo Biosciences IncAMAR 620, acquired Open Form 4 filing 0001257171-19-000064
2019-12-04 P, Open-market purchase Amarillo Biosciences IncAMAR 620, acquired Open Form 4 filing 0001257171-19-000064
2019-12-03 P, Open-market purchase Amarillo Biosciences IncAMAR 2 lines 1,000, acquired Open Form 4 filing 0001257171-19-000064
2019-12-02 P, Open-market purchase Amarillo Biosciences IncAMAR 2 lines 475, acquired Open Form 4 filing 0001257171-19-000063
2019-11-29 P, Open-market purchase Amarillo Biosciences IncAMAR 3 lines 477, acquired Open Form 4 filing 0001257171-19-000063
2019-11-26 P, Open-market purchase Amarillo Biosciences IncAMAR 440, acquired Open Form 4 filing 0001257171-19-000062
2019-11-25 P, Open-market purchase Amarillo Biosciences IncAMAR 360, acquired Open Form 4 filing 0001257171-19-000062
2019-11-18 P, Open-market purchase Amarillo Biosciences IncAMAR 390, acquired Open Form 4 filing 0001257171-19-000061
2019-11-13 P, Open-market purchase Amarillo Biosciences IncAMAR 760, acquired Open Form 4 filing 0001257171-19-000060
2019-11-11 P, Open-market purchase Amarillo Biosciences IncAMAR 380, acquired Open Form 4 filing 0001257171-19-000059

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
P, Open-market purchase
Open-market purchase
Relationships on this page
D, Director
Director

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. A row marked n lines adds up that many filed lines of one filing, on one day, on one side of the market; a filing whose lines fall across two pages is left as its lines on both, so no total here is ever short.

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 536
  • Open-market sale 7
  • 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. CHEN STEPHEN T, insider transactions. Retrieved 2026-08-25 from https://ebomi.com/insider/0001257171

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

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