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Insider · CIK 0001282683

Nierenberg Investment Management Company, LLC

CIK 0001282683 Name as filed on the most recent filing

Filed as Nierenberg Investment Management Company, LLC (1)· Nierenberg Investment Management Company, Inc. (34)· Nierenberg Investment Management Co (123)

704 transaction lines · from 158 filings · filed 2005-11-16 to 2026-07-24 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 2026-08-27 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.

31 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 2026-08-27 05:24 UTC.

Transactions filed by this insider
Direction Date Code Company Value USD Filing
2009-03-31 S, Open-market sale Natus Medical IncBABY 156,420, disposed Open Form 4 filing 0001005477-09-001782
2009-03-27 S, Open-market sale Natus Medical IncBABY 324,050, disposed Open Form 4 filing 0001005477-09-001782
2009-03-20 S, Open-market sale Electro Scientific Industries IncESIO 31,252, disposed Open Form 4 filing 0001005477-09-001704
2009-03-19 S, Open-market sale Electro Scientific Industries IncESIO 2 lines 155,483, disposed Open Form 4 filing 0001005477-09-001704
2009-03-18 S, Open-market sale Electro Scientific Industries IncESIO 2 lines 333,300, disposed Open Form 4 filing 0001005477-09-001704
2009-03-18 S, Open-market sale Natus Medical IncBABY 560,401, disposed Open Form 4 filing 0001005477-09-001686
2009-03-17 S, Open-market sale Natus Medical IncBABY 478,536, disposed Open Form 4 filing 0001005477-09-001686
2009-03-16 S, Open-market sale Natus Medical IncBABY 139,913, disposed Open Form 4 filing 0001005477-09-001686
2009-03-03 S, Open-market sale Medcath CorpMDTH 2 lines 485,800, disposed Open Form 4 filing 0001005477-09-001384
2009-02-10 S, Open-market sale Electro Scientific Industries IncESIO 6,928, disposed Open Form 4 filing 0001005477-09-000687
2009-02-09 S, Open-market sale Electro Scientific Industries IncESIO 95,590, disposed Open Form 4 filing 0001005477-09-000687
2009-02-06 S, Open-market sale Electro Scientific Industries IncESIO 322,982, disposed Open Form 4 filing 0001005477-09-000551
2009-02-05 S, Open-market sale Electro Scientific Industries IncESIO 268,080, disposed Open Form 4 filing 0001005477-09-000551
2009-02-04 S, Open-market sale Electro Scientific Industries IncESIO 384,600, disposed Open Form 4 filing 0001005477-09-000551
2008-12-29 P, Open-market purchase Radisys CorpRSYS 19,350, acquired Open Form 4 filing 0001005477-08-007023
2008-11-25 P, Open-market purchase Move IncMOVE 3 lines 1,720,000, acquired Open Form 4 filing 0001005477-08-006595
2008-11-21 P, Open-market purchase Move IncMOVE 2 lines 104,238, acquired Open Form 4 filing 0001005477-08-006584
2008-11-20 P, Open-market purchase Move IncMOVE 2 lines 308,191, acquired Open Form 4 filing 0001005477-08-006584
2008-10-14 S, Open-market sale Natus Medical IncBABY 539,170, disposed Open Form 4 filing 0001005477-08-006063
2008-08-29 P, Open-market purchase Asset Acceptance Capital CorpAACC 18,900, acquired Open Form 4 filing 0001005477-08-005508
2008-08-29 P, Open-market purchase Medcath CorpMDTH 40,812, acquired Open Form 4 filing 0001005477-08-005525
2008-08-28 P, Open-market purchase Asset Acceptance Capital CorpAACC 18,883, acquired Open Form 4 filing 0001005477-08-005508
2008-08-28 P, Open-market purchase Medcath CorpMDTH 40,814, acquired Open Form 4 filing 0001005477-08-005525
2008-08-27 P, Open-market purchase Asset Acceptance Capital CorpAACC 21,060, acquired Open Form 4 filing 0001005477-08-005508
2008-08-27 P, Open-market purchase Medcath CorpMDTH 39,900, acquired Open Form 4 filing 0001005477-08-005458
2008-08-26 P, Open-market purchase Medcath CorpMDTH 10,480, acquired Open Form 4 filing 0001005477-08-005458
2008-08-26 P, Open-market purchase Asset Acceptance Capital CorpAACC 25,825, acquired Open Form 4 filing 0001005477-08-005449
2008-08-25 P, Open-market purchase Medcath CorpMDTH 33,504, acquired Open Form 4 filing 0001005477-08-005458
2008-08-25 P, Open-market purchase Asset Acceptance Capital CorpAACC 25,056, acquired Open Form 4 filing 0001005477-08-005449
2008-08-22 P, Open-market purchase Medcath CorpMDTH 12,519, acquired Open Form 4 filing 0001005477-08-005435
2008-08-22 P, Open-market purchase Asset Acceptance Capital CorpAACC 26,064, acquired Open Form 4 filing 0001005477-08-005449
2008-08-21 P, Open-market purchase Asset Acceptance Capital CorpAACC 25,920, acquired Open Form 4 filing 0001005477-08-005417
2008-08-21 P, Open-market purchase Medcath CorpMDTH 41,540, acquired Open Form 4 filing 0001005477-08-005435
2008-08-20 P, Open-market purchase Asset Acceptance Capital CorpAACC 26,016, acquired Open Form 4 filing 0001005477-08-005417
2008-08-20 P, Open-market purchase Medcath CorpMDTH 39,900, acquired Open Form 4 filing 0001005477-08-005435
2008-08-19 P, Open-market purchase Asset Acceptance Capital CorpAACC 54,400, acquired Open Form 4 filing 0001005477-08-005417
2008-08-18 P, Open-market purchase Medcath CorpMDTH 78,033, acquired Open Form 4 filing 0001005477-08-005407
2008-08-18 P, Open-market purchase Asset Acceptance Capital CorpAACC 77,654, acquired Open Form 4 filing 0001005477-08-005395
2008-08-15 P, Open-market purchase Medcath CorpMDTH 34,352, acquired Open Form 4 filing 0001005477-08-005407
2008-08-15 P, Open-market purchase Asset Acceptance Capital CorpAACC 36,128, acquired Open Form 4 filing 0001005477-08-005395
2008-08-14 P, Open-market purchase Medcath CorpMDTH 34,064, acquired Open Form 4 filing 0001005477-08-005362
2008-08-14 P, Open-market purchase Asset Acceptance Capital CorpAACC 35,232, acquired Open Form 4 filing 0001005477-08-005395
2008-08-13 P, Open-market purchase Medcath CorpMDTH 35,292, acquired Open Form 4 filing 0001005477-08-005362

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
S, Open-market sale
Open-market sale
P, Open-market purchase
Open-market purchase

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 15
  • Open-market sale 16
  • 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. Nierenberg Investment Management Company, LLC, insider transactions. Retrieved 2026-08-27 from https://ebomi.com/insider/0001282683

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.