Who owns WLK? 13F holders and whale ownership
WLK is tracked across public portfolios in Whale Analyzer. This page answers who owns WLK, which top funds are buying WLK, aggregate disclosed value, and recent position changes based on public data. Robert Robotti is the largest reported holder at $17M; the top five funds control 100.0% of reported ownership; institutions were net selling last quarter (1 increased, 1 reduced); the stock trades above the aggregate whale cost basis of $75.13. Top tracked holders include Robert Robotti and Stanley Druckenmiller.
Continue to the live WLK dashboardTop holders
| Investor | Reported value | Shares | Change |
|---|---|---|---|
| Robert Robotti 13F portfolio Robotti & Co holdings | $16.9M | 145.0K | Reduced |
| Stanley Druckenmiller 13F portfolio Duquesne Family Office holdings | $2.5M | 21.2K | New |
Ownership concentration
Reported ownership of WLK is highly concentrated across tracked institutions.
- Single largest holder: 87.2% of reported ownership
- Top 5 holders: 100.0%
- Top 10 holders: 100.0%
Whale activity this quarter
Across 2 tracked institutions, 1 reduced, 1 increased. Net positioning is net selling.
- Robert Robotti — Robotti & Co ($16.9M) (▼ 43.4% qoq shares)
- Stanley Druckenmiller — Duquesne Family Office ($2.5M) · avg cost $75.13
Whale cost basis vs current price
The aggregate tracked cost basis is $75.13 versus a current price of $76.62, so WLK trades above its cost basis (+2.0%). Average unrealized P&L across tracked holders: 18%.
Sector positioning — Other
WLK sits within the Other sector alongside 670 other tracked names. Compare whale ownership across peers:
How to use this page
Values are reported public positions from tracked 13F filers and disclosures — not real-time ownership totals. Open the live WLK dashboard for price charts and cross-investor scans, or read the SEC 13F guide.
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Learn more in Whale Analyzer Academy
Deepen your read on WLK with these Whale Analyzer Academy guides:
Frequently asked questions
Who owns WLK stock?
Whale Analyzer tracks 2 public institutional holders of WLK with a combined reported value of $19.4M. See the holder table above for the largest tracked positions.
Which top funds are buying WLK?
Tracked institutions were net selling last quarter — 1 reduced, 1 increased. Check the "Change" column: "New" = fresh position, "Increased" = added, "Reduced" = trimmed.
How concentrated is WLK ownership?
The top five tracked holders report 100.0% of aggregate ownership.
Is WLK above or below the whale cost basis?
The aggregate tracked cost basis is $75.13 versus a current price of $76.62 (+2.0%).
What does 13F ownership mean for WLK?
Use the interactive WLK dashboard on Whale Analyzer for real-time holder analysis, or read our 13F Alpha Signals Guide.