Trade Summary

1 week ago, Buesinger Robert F., serving as EVP, PEM Segment Head at Westlake Corp (WLK), sold 4,000 shares at $115.25 per share, for a total transaction value of $461,000.00. Following this transaction, Buesinger Robert F. now holds 34,482 shares of WLK.

This sale represents a 10.00% decrease in Buesinger Robert F.'s stake in the company. This is considered a high-conviction trade given the significant change in ownership.

The trade was executed on Friday, March 27, 2026 and publicly disclosed via SEC Form 4 filing on Tuesday, March 31, 2026, 4 days after the trade was made.

Westlake Corp operates in the BASIC MATERIALS sector, specifically within the SPECIALTY CHEMICALS industry. Insider selling activity in this sector can provide valuable signals about industry trends and company-specific developments.