WLK
Westlake Corporation · Basic Materials · Chemicals - Specialty
Momentum inputs (comparable managers):
holder breadth -6.7% ·
share flow +25.0% ·
net new positions -7.1%
— formula
Concentrated accumulation — rising shares among fewer holders
All ownership figures: tracked 13F managers only, common-stock positions, reporting period Q1 2025
| Quarter | Holders | Δ | Shares | Reported value | New | Exits |
|---|---|---|---|---|---|---|
| Q2 2026 | 108 | +6 | 28.25M | $2.07B | +17 | −13 |
| Q1 2026 | 107 | +10 | 30.63M | $3.57B | +16 | −7 |
| Q4 2025 | 97 | -3 | 33.32M | $2.46B | +2 | −4 |
| Q3 2025 | 21 | +2 | 15.45M | $1.19B | +2 | −1 |
| Q2 2025 | 17 | 0 | 15.73M | $1.19B | +3 | −3 |
| Q1 2025 | 14 | -1 | 6.45M | $645.11M | — | −1 |
| Q4 2024 | 15 | 0 | 5.16M | $591.46M | +1 | −1 |
| Q3 2024 | 14 | +1 | 3.58M | $537.73M | +2 | −1 |
| Q2 2024 | 13 | — | 3.36M | $486.12M | — | — |
| # | Manager | Shares | Δ shares | Value | Their weight | Held | ||
|---|---|---|---|---|---|---|---|---|
| 1 | State Street Global Advisors ✦ (passive) | 1.63M | +36.5% | $163.06M | 0.0% | ▲ Add | 2 | SEC ↗ |
| 2 | Capital World Investors ✦ | 1.29M | +0.2% | $129.05M | 0.0% | ▲ Add | 4 | SEC ↗ |
| 3 | Millennium Management ✦ | 901.23K | +366.8% | $90.15M | 0.1% | ▲ Add | 4 | SEC ↗ |
| 4 | Citadel Advisors ✦ | 852.86K | +25.4% | $85.31M | 0.1% | ▲ Add | 4 | SEC ↗ ×2 |
| 5 | Geode Capital Management ✦ (passive) | 576.78K | +3.4% | $57.55M | 0.0% | ▲ Add | 4 | SEC ↗ ×2 |
| 6 | Norges Bank ✦ (passive) | 368.88K | -9.3% | $36.90M | 0.0% | ▼ Trim | 4 | SEC ↗ |
| 7 | Renaissance Technologies ✦ | 280.10K | -20.1% | $28.02M | 0.0% | ▼ Trim | 4 | SEC ↗ |
| 8 | Two Sigma Investments ✦ | 266.07K | +155.1% | $26.62M | 0.1% | ▲ Add | 4 | SEC ↗ |
| 9 | D. E. Shaw & Co. ✦ | 228.36K | -9.7% | $22.84M | 0.0% | ▼ Trim | 3 | SEC ↗ ×2 |
| 10 | T. Rowe Price ✦ | 21.18K | -4.2% | $2.12M | 0.0% | ▼ Trim | 4 | SEC ↗ |
| 11 | AQR Capital Management ✦ | 19.09K | +9.6% | $1.88M | 0.0% | ▲ Add | 4 | SEC ↗ ×4 |
| 12 | Adage Capital Partners ✦ | 5.99K | -80.0% | $598,980 | 0.0% | ▼ Trim | 2 | SEC ↗ |
| 13 | Gotham Asset Management ✦ | 5.43K | +33.3% | $543,263 | 0.0% | ▲ Add | 4 | SEC ↗ |
| 14 | Wellington Management ✦ | 4.67K | -89.1% | $467,540 | 0.0% | ▼ Trim | 4 | SEC ↗ ×2 |
“Their weight” = the position's share of that manager's reported 13F equity value — the conviction measure. ✦ = curated manager.
New buyers
| No new tracked buyers this quarter. |
Exited
| Marshall Wace | $1.82M | was 0.0% |
Full-market context: across ALL 13F filers (SEC structured data, Q1 2026): 332 holders, 44.00M shares, $4.81B reported. This is a different, older period than the tracked-universe figures above and the two are never mixed.
What else this security's tracked holders most often hold — shared-ownership counts, not fundamental relationships.
Open-market purchases (P)
No open-market insider purchases in our coverage window.
Open-market sales (S)
Officer, Director · 7.49K sh · $596,873
Officer, Director · 31.38K sh · $2.52M
Awards, exercises and tax withholding are never counted as buys or sales here. Methodology