Form 4 for WLK WESTLAKE CORP
Accepted 2026-05-14 12:33:47 ET · period of report 2026-05-12 · accession 0001193125-26-223323 · SEC index · Original document
Summary rows
Aggregated the way they appear in lists: one row per insider, transaction code and security table.
| X | Filed | Traded | Ticker | Insider | Title | Type | Price | Qty | Owned | ΔOwn | Value |
|---|---|---|---|---|---|---|---|---|---|---|---|
| D | 2026-05-14 12:33 | 2026-05-12 | WLK | Bender Mark Steven | EVP, CFO | M - OptEx | $0.00 | +13.2K | 41.2K | +47% | $0 |
| D | 2026-05-14 12:33 | 2026-05-13 | WLK | Bender Mark Steven | EVP, CFO | F - Tax | $97.34 | -5,284 | 35.9K | -13% | -$514.3K |
| D | 2026-05-14 12:33 | 2026-05-12 | WLK | Bender Mark Steven | EVP, CFO | M - OptEx | $0.00 | -13.2K | 0 | -100% | $0 |
Purchase Sale Sale after option exercise All abbreviations
Every reported transaction
| # | Table | Security | Date | Code | A/D | Shares | Price | Owned after | Own | Exercise / expiry | Underlying | Footnotes |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 1 | Common | Common Stock | 2026-05-12 | M | A | 13,164 | $0.00 | 41,179 | D | — | — | (F1) Restricted stock units ("RSUs") convert into the Issuer's common stock on a one-for-one basis. |
| 2 | Common | Common Stock | 2026-05-13 | F | D | 5,284 | $97.34 | 35,895 | D | — | — | (F3) Shares otherwise issuable were withheld to satisfy tax obligations arising out of the vesting of the reporting persons RSUs. |
| 3 | Derivative | Restricted Stock Units | 2026-05-12 | M | D | 13,164 | $0.00 | 0 | D | — · — to — | 13,164 Common Stock | (F1) Restricted stock units ("RSUs") convert into the Issuer's common stock on a one-for-one basis. (F2) On May 12, 2023, the reporting person was granted 13,164 RSUs vesting on the third anniversay of the grant date. (F2) On May 12, 2023, the reporting person was granted 13,164 RSUs vesting on the third anniversay of the grant date. |