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Insider · CIK 0001331852

Zakrzewski Joseph S

CIK 0001331852 Name as filed on the most recent filing

Filed as Zakrzewski Joseph S (42)

68 transaction lines · from 42 filings · filed 2008-07-01 to 2024-11-27 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.

68 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
2024-11-27 P, Open-market purchase An2 Therapeutics, Inc.ANTX 2,800, acquired Open Form 4 filing 0000950170-24-131499
2024-11-19 P, Open-market purchase An2 Therapeutics, Inc.ANTX 5,050, acquired Open Form 4 filing 0000950170-24-129248
2024-11-18 P, Open-market purchase An2 Therapeutics, Inc.ANTX 19,996, acquired Open Form 4 filing 0000950170-24-129248
2024-01-18 S, Open-market sale An2 Therapeutics, Inc.ANTX 1,911,410, disposed Open Form 4 filing 0000950170-24-005900
2022-12-07 P, Open-market purchase Cyteir Therapeutics, Inc.CYT 27,563, acquired Open Form 4 filing 0001209191-22-060377
2022-05-12 P, Open-market purchase Cyteir Therapeutics, Inc.CYT 1,196, acquired Open Form 4 filing 0001209191-22-029135
2022-05-11 P, Open-market purchase Cyteir Therapeutics, Inc.CYT 1,700, acquired Open Form 4 filing 0001209191-22-028574
2022-05-10 P, Open-market purchase Cyteir Therapeutics, Inc.CYT 93,377, acquired Open Form 4 filing 0001209191-22-028574
2021-12-28 P, Open-market purchase Cyteir Therapeutics, Inc.CYT 5,920, acquired Open Form 4 filing 0000899243-21-049973
2021-12-27 P, Open-market purchase Cyteir Therapeutics, Inc.CYT 2 lines 3,002, acquired Open Form 4 filing 0000899243-21-049973
2021-12-23 P, Open-market purchase Cyteir Therapeutics, Inc.CYT 1,974, acquired Open Form 4 filing 0000899243-21-049973
2021-12-17 P, Open-market purchase Cyteir Therapeutics, Inc.CYT 1,976, acquired Open Form 4 filing 0000899243-21-049198
2021-12-15 P, Open-market purchase Cyteir Therapeutics, Inc.CYT 2 lines 39,844, acquired Open Form 4 filing 0000899243-21-048432
2021-12-15 P, Open-market purchase Amarin Corp Plc\UkAMRN 6,310, acquired Open Form 4 filing 0001562180-21-007737
2021-12-14 P, Open-market purchase Amarin Corp Plc\UkAMRN 32,689, acquired Open Form 4 filing 0001562180-21-007737
2021-04-05 S, Open-market sale Acceleron Pharma IncXLRN 3 lines 1,407,343, disposed Open Form 4 filing 0001179110-21-004227
2021-04-01 S, Open-market sale Acceleron Pharma IncXLRN 4 lines 1,346,382, disposed Open Form 4 filing 0001179110-21-004122
2020-03-17 P, Open-market purchase Sangamo Therapeutics, IncSGMO 24,950, acquired Open Form 4 filing 0001209191-20-020303
2020-03-13 P, Open-market purchase Sangamo Therapeutics, IncSGMO 28,350, acquired Open Form 4 filing 0001209191-20-019005
2020-03-12 P, Open-market purchase Sangamo Therapeutics, IncSGMO 94,650, acquired Open Form 4 filing 0001209191-20-019005
2020-01-03 S, Open-market sale Amarin Corp Plc\UkAMRN 6,282,870, disposed Open Form 4 filing 0001209191-20-001469
2019-12-16 S, Open-market sale Amarin Corp Plc\UkAMRN 2,583,380, disposed Open Form 4 filing 0001209191-19-061213
2019-07-05 S, Open-market sale Amarin Corp Plc\UkAMRN 2,381,580, disposed Open Form 4 filing 0001209191-19-041364
2019-06-18 S, Open-market sale Amarin Corp Plc\UkAMRN 1,902,090, disposed Open Form 4 filing 0001209191-19-038330
2019-06-14 P, Open-market purchase Acceleron Pharma IncXLRN 190,250, acquired Open Form 4 filing 0001179110-19-007787
2019-02-22 S, Open-market sale Amarin Corp Plc\UkAMRN 3,594,438, disposed Open Form 4 filing 0001209191-19-012808
2019-01-10 S, Open-market sale Amarin Corp Plc\UkAMRN 2 lines 3,396,390, disposed Open Form 4 filing 0001209191-19-003500
2019-01-02 S, Open-market sale Amarin Corp Plc\UkAMRN 5,015,703, disposed Open Form 4 filing 0001209191-19-000522
2018-12-28 S, Open-market sale Amarin Corp Plc\UkAMRN 1,866,668, disposed Open Form 4 filing 0001209191-19-000522
2018-09-24 S, Open-market sale Amarin Corp Plc\UkAMRN 3 lines 5,299,334, disposed Open Form 4 filing 0001209191-18-052390
2017-03-02 S, Open-market sale Insulet CorpPODD 3 lines 1,874,495, disposed Open Form 4 filing 0001127602-17-010311
2016-12-30 P, Open-market purchase Acceleron Pharma IncXLRN 102,000, acquired Open Form 4 filing 0001179110-17-000102
2013-11-18 P, Open-market purchase Amarin Corp Plc\UkAMRN 78,197, acquired Open Form 4 filing 0001181431-13-059457
2012-10-01 S, Open-market sale Amarin Corp Plc\UkAMRN 1,884,315, disposed Open Form 4 filing 0001181431-12-053566
2012-07-27 S, Open-market sale Amarin Corp Plc\UkAMRN 2 lines 2,147,192, disposed Open Form 4 filing 0001181431-12-042747
2012-05-29 S, Open-market sale Amarin Corp Plc\UkAMRN 1,795,215, disposed Open Form 4 filing 0001181431-12-033788
2012-03-23 S, Open-market sale Amarin Corp Plc\UkAMRN 1,854,560, disposed Open Form 4 filing 0001181431-12-019802

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.

Search the catalog
Codes on this page
P, Open-market purchase
Open-market purchase
S, Open-market sale
Open-market sale
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 34
  • Open-market sale 34
  • 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. Zakrzewski Joseph S, insider transactions. Retrieved 2026-08-22 from https://ebomi.com/insider/0001331852

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

This page as JSON The JSON twin is shaped by the same read model as this page, so the two cannot disagree. Its envelope carries the canonical URL, the retrieval time, the coverage claim, and the licence statement.