Buesinger Robert F.
CIK 0001488587 Name as filed on the most recent filing
Filed as Buesinger Robert F. (26)
41 transaction lines · from 26 filings · filed 2011-08-05 to 2026-03-31 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.
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.
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.
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 2026-08-21 05:23 UTC.
No issuer is recorded
The catalog holds no filing linking this CIK to an issuer.
Transactions
Every stored Form 4 line naming this reporting owner, newest transaction date first. Each row links to the filing it came from.
41 transactions · Newest transaction date first, id breaking the tie.
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 2026-08-21 05:23 UTC.
| Direction | Date | Issuer | Code | Shares | Price | Value USD | Filing |
|---|---|---|---|---|---|---|---|
| 2026-03-27 |
Westlake Corp WLK |
S, Open-market sale | 4,000 disposed | 115.25 | 461,000.00 | Form 4, filing 0001193125-26-133508 | |
| 2025-05-27 |
Westlake Corp WLK |
S, Open-market sale | 83 disposed | 72.70 | 6,034.10 | Form 4, filing 0000950170-25-083572 | |
| 2025-04-22 |
Westlake Corp WLK |
P, Open-market purchase | 83 acquired | 93.39 | 7,751.37 | Form 4, filing 0000950170-25-083572 | |
| 2024-05-09 |
Westlake Corp WLK |
S, Open-market sale | 3,500 disposed | 158.50 | 554,750.00 | Form 4, filing 0000950170-24-058341 | |
| 2024-03-15 |
Westlake Corp WLK |
S, Open-market sale | 3,878 disposed | 144.50 | 560,371.00 | Form 4, filing 0000950170-24-032552 | |
| 2024-03-13 |
Westlake Corp WLK |
S, Open-market sale | 122 disposed | 144.50 | 17,629.00 | Form 4, filing 0000950170-24-031188 | |
| 2023-11-15 |
Westlake Corp WLK |
S, Open-market sale | 4,215 disposed | 130.50 | 550,057.50 | Form 4, filing 0001209191-23-055640 | |
| 2022-08-31 |
Westlake Corp WLK |
S, Open-market sale | 1,000 disposed | 98.94 | 98,940.00 | Form 4, filing 0001567619-22-016895 | |
| 2022-05-27 |
Westlake Corp WLK |
S, Open-market sale | 14,427 disposed | 129.47 | 1,867,820.41 | Form 4, filing 0001567619-22-011902 | |
| 2022-03-10 |
Westlake Corp WLK |
S, Open-market sale | 22,555 disposed | 117.61 | 2,652,693.55 | Form 4, filing 0001567619-22-006831 | |
| 2022-03-09 |
Westlake Corp WLK |
S, Open-market sale | 2,730 disposed | 115.55 | 315,451.50 | Form 4, filing 0001567619-22-006679 | |
| 2021-05-10 |
Westlake Chemical Corp WLK |
S, Open-market sale | 5,000 disposed | 105.00 | 525,000.00 | Form 4, filing 0001567619-21-009506 | |
| 2021-03-08 |
Westlake Chemical Corp WLK |
S, Open-market sale | 8,652 disposed | 92.50 | 800,310.00 | Form 4, filing 0001567619-21-005878 | |
| 2021-03-08 |
Westlake Chemical Corp WLK |
S, Open-market sale | 7,861 disposed | 95.00 | 746,795.00 | Form 4, filing 0001567619-21-005878 | |
| 2020-11-24 |
Westlake Chemical Corp WLK |
S, Open-market sale | 4,581 disposed | 77.50 | 355,027.50 | Form 4, filing 0001567619-20-020336 | |
| 2018-05-15 |
Westlake Chemical Corp WLK |
S, Open-market sale | 1,447 disposed | 118.88 | 172,012.12 | Form 4, filing 0001140361-18-024149 | |
| 2018-03-05 |
Westlake Chemical Corp WLK |
S, Open-market sale | 15,315 disposed | 113.05 | 1,731,360.75 | Form 4, filing 0001140361-18-012224 | |
| 2018-03-05 |
Westlake Chemical Corp WLK |
S, Open-market sale | 4,034 disposed | 113.00 | 455,842.00 | Form 4, filing 0001140361-18-012224 | |
| 2017-12-01 |
Westlake Chemical Corp WLK |
S, Open-market sale | 2,674 disposed | 98.50 | 263,389.00 | Form 4, filing 0001140361-17-044706 | |
| 2017-11-17 |
Westlake Chemical Corp WLK |
S, Open-market sale | 5,214 disposed | 93.82 | 489,199.38 | Form 4, filing 0001140361-17-043287 | |
| 2017-03-01 |
Westlake Chemical Corp WLK |
S, Open-market sale | 8,193 disposed | 66.25 | 542,786.25 | Form 4, filing 0001140361-17-010641 | |
| 2016-11-10 |
Westlake Chemical Corp WLK |
S, Open-market sale | 2,880 disposed | 54.42 | 156,737.09 | Form 4, filing 0001140361-16-086416 | |
| 2014-05-07 |
Westlake Chemical Corp WLK |
S, Open-market sale | 1,872 disposed | 77.36 | 144,819.42 | Form 4, filing 0001140361-14-019631 | |
| 2014-02-26 |
Westlake Chemical Corp WLK |
S, Open-market sale | 2,361 disposed | 132.95 | 313,904.39 | Form 4, filing 0001140361-14-009942 | |
| 2013-05-08 |
Westlake Chemical Corp WLK |
S, Open-market sale | 1,478 disposed | 90.97 | 134,454.69 | Form 4, filing 0001140361-13-020106 | |
| 2013-03-11 |
Westlake Chemical Corp WLK |
S, Open-market sale | 600 disposed | 93.80 | 56,280.00 | Form 4, filing 0001140361-13-012330 | |
| 2013-03-11 |
Westlake Chemical Corp WLK |
S, Open-market sale | 600 disposed | 93.76 | 56,256.00 | Form 4, filing 0001140361-13-012330 | |
| 2013-03-11 |
Westlake Chemical Corp WLK |
S, Open-market sale | 461 disposed | 93.79 | 43,237.19 | Form 4, filing 0001140361-13-012330 | |
| 2013-03-11 |
Westlake Chemical Corp WLK |
S, Open-market sale | 200 disposed | 93.81 | 18,762.00 | Form 4, filing 0001140361-13-012330 | |
| 2013-03-11 |
Westlake Chemical Corp WLK |
S, Open-market sale | 100 disposed | 93.82 | 9,381.68 | Form 4, filing 0001140361-13-012330 | |
| 2013-03-11 |
Westlake Chemical Corp WLK |
S, Open-market sale | 100 disposed | 93.82 | 9,381.50 | Form 4, filing 0001140361-13-012330 | |
| 2013-03-11 |
Westlake Chemical Corp WLK |
S, Open-market sale | 100 disposed | 93.81 | 9,381.03 | Form 4, filing 0001140361-13-012330 | |
| 2013-03-11 |
Westlake Chemical Corp WLK |
S, Open-market sale | 100 disposed | 93.78 | 9,378.00 | Form 4, filing 0001140361-13-012330 | |
| 2013-03-11 |
Westlake Chemical Corp WLK |
S, Open-market sale | 100 disposed | 93.77 | 9,377.00 | Form 4, filing 0001140361-13-012330 | |
| 2012-12-10 |
Westlake Chemical Corp WLK |
S, Open-market sale | 922 disposed | 75.68 | 69,778.34 | Form 4, filing 0001140361-12-050909 | |
| 2012-08-06 |
Westlake Chemical Corp WLK |
S, Open-market sale | 1,078 disposed | 67.16 | 72,398.59 | Form 4, filing 0001140361-12-035873 | |
| 2012-08-06 |
Westlake Chemical Corp WLK |
S, Open-market sale | 400 disposed | 67.16 | 26,864.00 | Form 4, filing 0001140361-12-035873 | |
| 2011-05-19 |
Westlake Chemical Corp WLK |
S, Open-market sale | 677 disposed | 55.39 | 37,499.03 | Form 4, filing 0001140361-11-039936 | |
| 2011-05-19 |
Westlake Chemical Corp WLK |
S, Open-market sale | 600 disposed | 55.40 | 33,240.00 | Form 4, filing 0001140361-11-039936 | |
| 2011-05-19 |
Westlake Chemical Corp WLK |
S, Open-market sale | 100 disposed | 55.43 | 5,543.00 | Form 4, filing 0001140361-11-039936 | |
| 2011-05-19 |
Westlake Chemical Corp WLK |
S, Open-market sale | 100 disposed | 55.42 | 5,542.00 | Form 4, filing 0001140361-11-039936 |
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.
- S, Open-market sale
- Open-market sale
- P, Open-market purchase
- Open-market purchase
Every value is as reported on the Form 4. A price the filing did not report is marked Not reported and no value is computed from it. Codes outside the open market, drawn in grey behind a dashed rule, are compensation and administrative machinery rather than a decision to trade at the prevailing price.
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 1
- Open-market sale 40
- 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. Buesinger Robert F., insider transactions. Retrieved 2026-08-21 from https://ebomi.com/insider/0001488587
Balogh, A. Insider trading. Scientific Data 10, 237 (2023) doi:10.1038/s41597-023-02147-6