MCCOLLUM MARK A

PrivateCIK: 1215888
Location

HOUSTON, TX

MCCOLLUM MARK A exercised options at WESTLAKE CORP

Option exercise — a mechanical event triggered by vesting or expiry. Not a discretionary conviction trade.

M · 1 exercise
InsiderMCCOLLUM MARK ACIK 1215888
IssuerWESTLAKE CORPCIK 1262823
Director
Since Aug 2018
+2.17K
Net shares
Net buyer
$0.00
Total acquired
0
Open market trades
0B · 0S
3
Total transactions
3.30K acquired · 1.13K disposed
Non-Derivative Transactions1

Common Stock

Direct
M · Option Exercise

Shares

+1.13K

Price / share

Trade value

% of position

13.2%
8/9/2025
8.53K9.66K
Total

Net shares

+1.13K

Net value

$0.00

Derivative Transactions2

Restricted Stock Units

Direct
A · Award
Converts to

Common Stock

2.17K shares

Shares

+2.17K

Strike price

Held after

2.17K

Exercisable

8/8/2025

Restricted Stock Units

Direct
M · Option Exercise
Converts to

Common Stock

1.13K shares

Shares

1.13K

Strike price

Held after

0.00

Exercisable

8/9/2025
MCCOLLUM MARK A — Insider Transaction (Form 4) Filed Aug 11, 2025 | Finecho