Ownership history in ROBOTTI ROBERT · 46 quarters on record
This page tracks every 13F SEC filing in which ROBOTTI ROBERT reported a position in WESTLAKE SHEM CORP (WLK). Data includes quarterly share count, position size as % of portfolio, estimated market value, and end-of-quarter stock price — sourced directly from SEC EDGAR 13F filings.
| Quarter | Action | Shares | Change | Chg % | % of Fund | Mkt Value | Price (EOQ) |
|---|---|---|---|---|---|---|---|
| 2025 Q4 | ADDED | 256,244 | +74,393 | +40.9% | 2.67% | $18.9M | $73.57 |
| 2025 Q3 | REDUCED | 181,851 | -989 | -0.5% | 2.43% | $14.0M | $76.01 |
| 2025 Q2 | ADDED | 182,840 | +18,144 | +11.0% | 2.31% | $13.8M | $74.42 |
| 2025 Q1 | ADDED | 164,696 | +397 | +0.2% | 3.30% | $16.5M | $97.39 |
As of 2025 Q4 — sorted by position size