Westlake Corp (WLK) insider trading.
In Q3 2026, insiders at Westlake Corp reported 12 non-derivative transactions on 22 Forms 3, 4 and 5: 0 open-market purchases and 2 sales worth $3.1M.
- Transactions
- 12
- Purchases (P)
- 0
- Sales (S)
- 2
- Net shares, P minus S
- -38,873
- Insiders
- 10
- Last filed
- 2026-08-11
Insiders
| Insider | Relationship | Transactions | Buys | Sales |
|---|---|---|---|---|
| Chao Albert | Director, Officer · Executive Chairman | 3 | 0 | 2 |
| Chao Catherine T. | Director | 1 | 0 | 0 |
| Chao David Tsung-Hung | Director | 1 | 0 | 0 |
| Cregg Roger A | Director | 1 | 0 | 0 |
| Graff Michael J | Director | 1 | 0 | 0 |
| Lubel Kimberly S | Director | 1 | 0 | 0 |
| Mccollum Mark A | Director | 1 | 0 | 0 |
| Northcutt R Bruce | Director | 1 | 0 | 0 |
| Sabat Carolyn Chao | Director | 1 | 0 | 0 |
| Sheets Jeffrey Wayne | Director | 1 | 0 | 0 |
Transactions
| Date | Insider | Code | Shares | Price | Owned after | Filing |
|---|---|---|---|---|---|---|
| 2026-08-11 | Chao Albert | M (A) | 38,873 | $61.87 | 681,753 | Form 4 |
| 2026-08-11 | Chao Albert | S (D) | 31,384 | $80.42 | 642,880 | Form 4 |
| 2026-08-11 | Chao Albert | S (D) | 7,489 | $79.7 | 674,264 | Form 4 |
| 2026-08-08 | Chao Catherine T. | M (A) | 2,168 | — | 7,748 | Form 4 |
| 2026-08-08 | Chao David Tsung-Hung | M (A) | 2,168 | — | 11,080 | Form 4 |
| 2026-08-08 | Cregg Roger A | M (A) | 2,168 | — | 3,507 | Form 4 |
| 2026-08-08 | Graff Michael J | M (A) | 2,168 | — | 23,310 | Form 4 |
| 2026-08-08 | Lubel Kimberly S | M (A) | 2,168 | — | 13,821 | Form 4 |
| 2026-08-08 | Mccollum Mark A | M (A) | 2,168 | — | 11,824 | Form 4 |
| 2026-08-08 | Northcutt R Bruce | M (A) | 2,168 | — | 23,351 | Form 4 |
| 2026-08-08 | Sabat Carolyn Chao | M (A) | 2,168 | — | 5,748 | Form 4 |
| 2026-08-08 | Sheets Jeffrey Wayne | M (A) | 2,168 | — | 14,927 | Form 4 |
Transaction codes in this quarter
Get WLK insider transactions through the API
curl "https://sec-api.dev/api/v1/insider-transactions?period=2026q3&cik=1262823&limit=100" \
-H "Authorization: Bearer $SEC_API_KEY"Insider trading API guide · WLK company page · Westlake Corp on SEC.gov
Questions
Are insiders buying or selling Westlake Corp (WLK)?
In Q3 2026, insiders at Westlake Corp reported 12 non-derivative transactions on 22 Forms 3, 4 and 5: 0 open-market purchases and 2 sales worth $3.1M. Grants, tax withholding and option exercises are counted as transactions but are not purchases or sales.
Where do these Westlake Corp insider trades come from?
From the SEC Insider Transactions Data Sets for Q3 2026, which republish the Forms 3, 4 and 5 filed on EDGAR. Each row links to its filing on SEC.gov.
Plain-text version for agents and LLMs: /insider-trading/wlk.md
Independent. Not affiliated with, endorsed by, or sponsored by the U.S. Securities and Exchange Commission. Data is reproduced from public SEC filings and datasets. Not investment advice.