Key facts
- This page summarizes Robert F. Buesinger's Form 4 filing for WESTLAKE CORP (WLK).
- 1 reported transaction and 0 derivative rows are listed below.
- Accepted by SEC: 31 Mar 2026, 09:48.
Robert F. Buesinger - 30 Mar 2026 Form 4 Insider Report for WESTLAKE CORP (WLK)
- Reporting relationship
- EVP, PEM Segment Head
- Issuer ticker
- WLK
- Reported as of
- 30 Mar 2026
- Net transaction value
- -$461,000
- SEC form
- 4
- Accepted by SEC
- 31 Mar 2026, 09:48:51 UTC
- Prior SEC filing
- 23 Feb 2026
- Source filing
- View source filing
- Reporting owner signature
- Robert F. Buesinger by J Feng POA
Source evidence
Original filing metadata and source links for verification.
4 source fields
Reporting owner
1 detail
Key filing fact
Robert F. Buesinger filed Form 4 for WESTLAKE CORP (WLK) on 31 Mar 2026.
Change
- Previous filing in this sequence was filed on 23 Feb 2026.
- Current net transaction value: -$461,000.
Research use
- This tells you what this filing adds before you inspect full transaction and derivative tables.
- You can trace every row back to the original SEC filing document.
Evidence
Filed on Form 4
View source filing
Ownership activity is grounded in SEC Form 4 disclosures.
Reporting Owners (1)
CIK 0001488587
Primary reporting owner
Buesinger Robert F.
- Relationship
- EVP, PEM Segment Head
- Address
- 2801 POST OAK BLVD., STE. 600, HOUSTON
- Signature
- Robert F. Buesinger by J Feng POA
- Signature date
- 31 Mar 2026
Reported non-derivative transactions
Shares, units, or other non-derivative securities reported in this filing.
WLK
transaction
Common Stock
Sale
- Transaction value
- $461,000
- Shares
- -4,000
- Change %
- -10%
- Price
- $115.25
- Shares after
- 34,482
- Date
- 27 Mar 2026
- Ownership
- Direct
* marks a reported price that did not pass the local price check.