Arkolith/Insider Trading/WLK/Form 4

Bender Mark Steven

EVP & CFOWESTLAKE CORP (WLK) · full profile →Form 4 · filed May 14, 2026
No Open-Market Flow
Open-Market Buys
$0
Open-Market Sells
$0
Net Open-Market Flow
$0
Transactions
3
2 non-derivative · 1 derivative

Non-Derivative Transactions (Table I)

DateActionSharesPriceValueOwned After
May 13, 2026Tax withholding(F)5K$97.34$514K36K
May 12, 2026Option exercise(M)13K—$041K

Derivative Transactions (Table II)

DateActionSharesPriceValueOwned After
May 12, 2026Option exercise(M)13K—$00

Transaction Codes

F
Shares withheld for taxes
M
Option exercise / conversion

Data Source & Provenance

Parsed from a single SEC EDGAR Form 4 filing (accession 0001193125-26-223323) within minutes of acceptance. Every field above traces to the original document. Verify it directly:

View original filing on SEC.govRaw Form 4 XML