Jean-Marc Gilson

Insider Reports History

Identity Names, identifiers, and filing context for this profile. 1 identity field
Reporting-owner location
Houston, TX
SEC source record Original filing metadata and source links for verification. 1 source field
Latest reporting-owner signature
/s/Abigail Jarrell, by power-of-attorney
Source: Latest parsed Forms 3/4/5 signature
Source evidence Original filing metadata and source links for verification. 1 source field
Transaction source note
Rows are grouped by transaction date from the original SEC filing. Open the aggregated insider activity page to review issuer-level activity across dates.

Reported holdings for Jean-Marc Gilson

Form 4 holding President and CEO

WESTLAKE CORP

Security class
Restricted Stock Units
Shares / value
29,784
Estimated value
$994,197
Report date
20 Feb 2026
Price
$110.54
Ownership
Direct
Underlying class
Common Stock
Underlying amount
Form 4 holding President and CEO, Director

Westlake Chemical Partners LP

Security class
Common Units
Shares / value
11,803
Estimated value
$250,824
Report date
27 Aug 2025
Price
$21.25
Ownership
Direct
Form 4 holding President and CEO

WESTLAKE CORP

Security class
Employee Option (right to buy)
Shares / value
109,139
Estimated value
Report date
20 Feb 2026
Price
Ownership
Direct
Underlying class
Common Stock
Underlying amount

Insider Reports Filed by Jean-Marc Gilson

We use cookies and similar technologies to provide certain features, enhance the user experience and, if you allow them, measure engagement and deliver advertising. Analytics and marketing storage stay off until you grant consent. By clicking on "Agree and continue", you declare your consent to the use of the selected optional cookies. Manage preferences to update or revoke optional consent for future visits. For more information, see our Privacy Policy .