Westlake CORP (WLK) — Who Owns This Stock? 13F Breakdown (Q2 2026)

WLK ranks #1732 out of 37501 tracked stocks by institutional interest — one of the most closely watched names in our coverage.

359 institutions disclose a position in WLK, but none treat it as a major bet — even Robotti Robert, its most concentrated holder, allocates just 2.8% of its own portfolio to it.

Cliff Asness has added to its WLK position for two straight quarters, increasing it by $113.1M to reach $114.6M today.

Wellington Management Group LLP has trimmed its WLK position for two straight quarters, cutting it by $301.7M while still holding $10.4M.

WLK is down 0.8% today, but institutions show net buying of $15.4M this quarter — a divergence between today's price move and the underlying institutional flow.

WLK reported a net loss of $1.2B over the trailing twelve months.

• Not yet profitable — net loss of $1.2B over the trailing twelve months
• Revenue declined 4.0% year over year
• Net income declined year over year, from -$67.0M to -$1.2B
• Generated $465.0M in positive operating cash flow
• Current ratio of 2.24x — enough short-term assets to cover short-term liabilities
• Liabilities run 1.21x equity — within a conventional range