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WESTLAKE CORPORATION (WLK)

Institutional ownership, SEC filings and insider activity

Sector: Raw materials · SEC CIK 0001262823 · EDGAR filings · Updated 2026-06-16

WESTLAKE CORPORATION (WLK) has reported institutional ownership of 34.4%, with 333 institutional managers holding positions valued at $5.15B per the latest 13F reporting period. The company has 11 bond series in the registry.

Latest updates

• 2026-06-16 — Insider transaction reported (Form 4)
• 2026-06-15 — Current report (8-K) filed
• 2026-06-15 — Initial insider ownership filed (Form 3)
• 2026-05-18 — SD filed
• 2026-05-18 — Current report (8-K) filed
• 2026-05-14 — Insider transaction reported (Form 4)

Institutional ownership overview

According to SEC 13F filings tracked by Sightfile, WESTLAKE CORPORATION has 333 institutional holders and institutional ownership of 34.4%.

Insider activity

Insiders reported 58 transactions (1 buys, 8 sells) across 17 reporting insiders, with a net reported value of −$7.07M.

Debt profile

11 active bond series in the registry, coupons ranging 1.62%–6.38%, maturities through 2061, built from the company's own prospectus filings.

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