Changes in Beneficial Ownership · 4
Westlake Corporation
WLKNYSEEQUITYCurrent
Changes in Beneficial Ownership
Structured filing — 4
ownership.xml
Filing details
- Report period
- 2026-08-14
- Issuer
- WESTLAKE CORP
- Issuer CIK
- 0001262823
- Trading symbol
- WLK
Reporting owner 1
- Name
- MCCOLLUM MARK A
- Reporting owner CIK
- 0001215888
- Relationship
- Director
- Address
- 2801 POST OAK BLVD., STE. 600, HOUSTON, TX, 77056
Derivative transactions
| Security | Conversion / exercise price (USD) | Transaction date | Code | Amount | A / D | Price (USD) | Exercisable | Expires | Underlying security | Underlying shares | Owned after | Ownership |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Restricted Stock Units | [F1] | 2026-08-14 | A · Form 4 | 2,184 | A | 0 | [F2] | [F2] | Common Stock | 2,184 | 2,184 | D |
Table key
- A · Form 4
- Acquisition by grant, award or otherwise under Rule 16b-3(d)
- A
- Acquired
- D
- Direct
Footnotes
- F1
- Restricted stock units convert into the Issuer's common stock on a one-for-one basis.↩ 1
Signature 1
- Signed
- Mark A. McCollum by J Feng POA
- Date
- 2026-08-17
Company context
Celebrating 40 years of operations in 2026, Westlake is a global manufacturer and supplier of materials and innovative products that enhance life every day. Headquartered in Houston, with operations in Asia, Europe and North America, we provide the building blocks for vital solutions - from housing and construction, to packaging and healthcare, to automotive and consumer goods.