Insider · CIK 0001330417

Bender Mark Steven

CIK 0001330417 Name as filed on the most recent filing

Filed as Bender Mark Steven (42)

103 transaction lines · from 42 filings · filed 2010-08-10 to 2026-03-30 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.

103 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
2026-03-27 S, Open-market sale Westlake CorpWLK 1,847,037, disposed Open Form 4 filing 0001193125-26-131706
2026-02-27 S, Open-market sale Westlake CorpWLK 2 lines 1,756,997, disposed Open Form 4 filing 0001193125-26-084672
2024-05-03 S, Open-market sale Westlake CorpWLK 753,341, disposed Open Form 4 filing 0000950170-24-053244
2024-03-06 S, Open-market sale Westlake CorpWLK 677,455, disposed Open Form 4 filing 0000950170-24-027605
2024-02-26 S, Open-market sale Westlake CorpWLK 667,765, disposed Open Form 4 filing 0000950170-24-021783
2022-03-31 S, Open-market sale Westlake CorpWLK 2 lines 748,734, disposed Open Form 4 filing 0001567619-22-007819
2022-03-30 S, Open-market sale Westlake CorpWLK 2 lines 748,810, disposed Open Form 4 filing 0001567619-22-007737
2022-03-29 S, Open-market sale Westlake CorpWLK 489,748, disposed Open Form 4 filing 0001567619-22-007689
2022-03-25 S, Open-market sale Westlake CorpWLK 2 lines 1,002,724, disposed Open Form 4 filing 0001567619-22-007575
2022-03-24 S, Open-market sale Westlake CorpWLK 1,003,070, disposed Open Form 4 filing 0001567619-22-007463
2022-03-23 S, Open-market sale Westlake CorpWLK 2 lines 751,011, disposed Open Form 4 filing 0001567619-22-007422
2021-11-11 S, Open-market sale Westlake Chemical CorpWLK 240,619, disposed Open Form 4 filing 0001567619-21-020169
2021-11-08 S, Open-market sale Westlake Chemical CorpWLK 63,587, disposed Open Form 4 filing 0001567619-21-019659
2021-11-05 S, Open-market sale Westlake Chemical CorpWLK 627,947, disposed Open Form 4 filing 0001567619-21-019456
2021-03-12 S, Open-market sale Westlake Chemical CorpWLK 2 lines 1,490,587, disposed Open Form 4 filing 0001567619-21-006247
2021-03-09 S, Open-market sale Westlake Chemical CorpWLK 2,381,630, disposed Open Form 4 filing 0001567619-21-005948
2020-11-06 S, Open-market sale Westlake Chemical CorpWLK 119,671, disposed Open Form 4 filing 0001567619-20-018999
2020-11-05 S, Open-market sale Westlake Chemical CorpWLK 2 lines 1,849,439, disposed Open Form 4 filing 0001567619-20-018814
2020-03-13 P, Open-market purchase Westlake Chemical Partners LPWLKP 14,914, acquired Open Form 4 filing 0001567619-20-006351
2020-03-12 P, Open-market purchase Westlake Chemical Partners LPWLKP 15,073, acquired Open Form 4 filing 0001567619-20-006351
2018-05-21 S, Open-market sale Westlake Chemical CorpWLK 3 lines 1,482,122, disposed Open Form 4 filing 0001140361-18-025119
2018-05-11 S, Open-market sale Westlake Chemical CorpWLK 2,757,959, disposed Open Form 4 filing 0001140361-18-023144
2018-02-27 P, Open-market purchase Westlake Chemical Partners LPWLKP 47,535, acquired Open Form 4 filing 0001140361-18-010379
2018-02-26 S, Open-market sale Westlake Chemical CorpWLK 2 lines 558,470, disposed Open Form 4 filing 0001140361-18-010336
2018-02-22 S, Open-market sale Westlake Chemical CorpWLK 443,880, disposed Open Form 4 filing 0001140361-18-009760
2018-02-22 S, Open-market sale Westlake Chemical CorpWLK 221,270, disposed Open Form 4 filing 0001140361-18-010042
2017-12-04 S, Open-market sale Westlake Chemical CorpWLK 635,902, disposed Open Form 4 filing 0001140361-17-045021
2017-11-21 S, Open-market sale Westlake Chemical CorpWLK 1,921,309, disposed Open Form 4 filing 0001140361-17-043632
2017-11-13 S, Open-market sale Westlake Chemical CorpWLK 2 lines 2,802,082, disposed Open Form 4 filing 0001140361-17-042931
2017-08-15 S, Open-market sale Westlake Chemical CorpWLK 968,620, disposed Open Form 4 filing 0001140361-17-032454
2017-03-10 S, Open-market sale Westlake Chemical CorpWLK 771,785, disposed Open Form 4 filing 0001140361-17-011748
2014-08-04 P, Open-market purchase Westlake Chemical Partners LPWLKP 240,000, acquired Open Form 4 filing 0001140361-14-031040
2014-03-03 S, Open-market sale Westlake Chemical CorpWLK 2,367,526, disposed Open Form 4 filing 0001140361-14-010847
2013-08-12 S, Open-market sale Westlake Chemical CorpWLK 295,930, disposed Open Form 4 filing 0001140361-13-032906
2013-08-08 S, Open-market sale Westlake Chemical CorpWLK 303,000, disposed Open Form 4 filing 0001140361-13-031718
2013-03-25 S, Open-market sale Westlake Chemical CorpWLK 420,755, disposed Open Form 4 filing 0001140361-13-014071
2012-12-03 S, Open-market sale Westlake Chemical CorpWLK 222,066, disposed Open Form 4 filing 0001140361-12-049798
2012-12-03 S, Open-market sale Westlake Chemical CorpWLK 144,575, disposed Open Form 4 filing 0001140361-12-049798
2012-12-03 S, Open-market sale Westlake Chemical CorpWLK 55,713, disposed Open Form 4 filing 0001140361-12-049798

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
P, Open-market purchase
Open-market purchase
Relationships on this page
O, Officer
Officer
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 4
  • Open-market sale 99
  • 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. Bender Mark Steven, insider transactions. Retrieved 2026-08-22 from https://ebomi.com/insider/0001330417

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

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