Security record · archived quarter
WLK
Westlake Corporation · Basic Materials · Chemicals - Specialty
108Tracked holders
+4Δ holders
28.25MShares held
$2.07BReported value
+17New positions
−13Exits
Momentum inputs (comparable managers):
holder breadth +3.8% ·
share flow -7.4% ·
net new positions +3.7%
— formula
Ownership fragmentation — more holders, smaller aggregate stake
All ownership figures: tracked 13F managers only, common-stock positions, reporting period Q2 2026
Ownership over time
| Quarter | Holders | Δ | Shares | Reported value | New | Exits |
|---|---|---|---|---|---|---|
| Q2 2026 | 108 | +4 | 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 | — | — |
Who holds it · Q2 2026
| # | Manager | Shares | Δ shares | Value | Their weight | Held | ||
|---|---|---|---|---|---|---|---|---|
| 1 | BlackRock ✦ (passive) | 3.29M | +7.0% | $240.47M | 0.0% | ▲ Add | 5 | SEC ↗ |
| 2 | BlackRock ✦ (passive) | 3.29M | +7.0% | $240.47M | 0.0% | ▲ Add | 5 | SEC ↗ |
| 3 | BlackRock ✦ (passive) | 3.29M | +7.0% | $240.47M | 0.0% | ▲ Add | 5 | SEC ↗ |
| 4 | BlackRock ✦ (passive) | 3.29M | +7.0% | $240.47M | 0.0% | ▲ Add | 5 | SEC ↗ |
| 5 | BlackRock ✦ (passive) | 3.29M | +7.0% | $240.47M | 0.0% | ▲ Add | 5 | SEC ↗ |
| 6 | BlackRock ✦ (passive) | 3.29M | +7.0% | $240.47M | 0.0% | ▲ Add | 5 | SEC ↗ |
| 7 | BlackRock ✦ (passive) | 3.29M | +7.0% | $240.47M | 0.0% | ▲ Add | 5 | SEC ↗ |
| 8 | BlackRock ✦ (passive) | 3.29M | +7.0% | $240.47M | 0.0% | ▲ Add | 5 | SEC ↗ |
| 9 | BlackRock ✦ (passive) | 3.29M | +7.0% | $240.47M | 0.0% | ▲ Add | 5 | SEC ↗ |
| 10 | BlackRock ✦ (passive) | 3.29M | +7.0% | $240.47M | 0.0% | ▲ Add | 5 | SEC ↗ |
| 11 | BlackRock ✦ (passive) | 3.29M | +7.0% | $240.47M | 0.0% | ▲ Add | 5 | SEC ↗ |
| 12 | BlackRock ✦ (passive) | 3.29M | +7.0% | $240.47M | 0.0% | ▲ Add | 5 | SEC ↗ |
| 13 | BlackRock ✦ (passive) | 3.29M | +7.0% | $240.47M | 0.0% | ▲ Add | 5 | SEC ↗ |
| 14 | BlackRock ✦ (passive) | 3.29M | +7.0% | $240.47M | 0.0% | ▲ Add | 5 | SEC ↗ |
| 15 | BlackRock ✦ (passive) | 3.29M | +7.0% | $240.47M | 0.0% | ▲ Add | 5 | SEC ↗ |
| 16 | BlackRock ✦ (passive) | 3.29M | +7.0% | $240.47M | 0.0% | ▲ Add | 5 | SEC ↗ |
| 17 | BlackRock ✦ (passive) | 3.29M | +7.0% | $240.47M | 0.0% | ▲ Add | 5 | SEC ↗ |
| 18 | BlackRock ✦ (passive) | 3.29M | +7.0% | $240.47M | 0.0% | ▲ Add | 5 | SEC ↗ |
| 19 | Capital World Investors ✦ | 2.84M | -32.5% | $207.49M | 0.0% | ▼ Trim | 3 | SEC ↗ |
| 20 | T. Rowe Price ✦ | 2.21M | -8.3% | $161.09M | 0.0% | ▼ Trim | 9 | SEC ↗ |
| 21 | T. Rowe Price ✦ | 2.21M | -8.3% | $161.09M | 0.0% | ▼ Trim | 9 | SEC ↗ |
| 22 | Dimensional Fund Advisors Lp | 2.05M | +39.9% | $149.78M | 0.0% | ▲ Add | 3 | SEC ↗ |
| 23 | Dimensional Fund Advisors Lp | 2.05M | +39.9% | $149.78M | 0.0% | ▲ Add | 3 | SEC ↗ |
| 24 | Dimensional Fund Advisors Lp | 2.05M | +39.9% | $149.78M | 0.0% | ▲ Add | 3 | SEC ↗ |
| 25 | Dimensional Fund Advisors Lp | 2.05M | +39.9% | $149.78M | 0.0% | ▲ Add | 3 | SEC ↗ |
| 26 | Dimensional Fund Advisors Lp | 2.05M | +39.9% | $149.78M | 0.0% | ▲ Add | 3 | SEC ↗ |
| 27 | AQR Capital Management ✦ | 1.57M | +503.9% | $114.64M | 0.0% | ▲ Add | 9 | SEC ↗ |
| 28 | AQR Capital Management ✦ | 1.57M | +503.9% | $114.64M | 0.0% | ▲ Add | 9 | SEC ↗ |
| 29 | AQR Capital Management ✦ | 1.57M | +503.9% | $114.64M | 0.0% | ▲ Add | 9 | SEC ↗ |
| 30 | AQR Capital Management ✦ | 1.57M | +503.9% | $114.64M | 0.0% | ▲ Add | 9 | SEC ↗ |
| 31 | AQR Capital Management ✦ | 1.57M | +503.9% | $114.64M | 0.0% | ▲ Add | 9 | SEC ↗ |
| 32 | Vanguard Capital Management Llc | 1.46M | +0.6% | $106.89M | 0.0% | ▲ Add | 2 | SEC ↗ |
| 33 | State Street Global Advisors ✦ (passive) | 1.45M | +5.3% | $106.10M | 0.0% | ▲ Add | 7 | SEC ↗ |
| 34 | Goldman Sachs Group ✦ | 1.28M | -8.1% | $93.50M | 0.0% | ▼ Trim | 4 | SEC ↗ |
| 35 | Goldman Sachs Group ✦ | 1.28M | -8.1% | $93.50M | 0.0% | ▼ Trim | 4 | SEC ↗ |
| 36 | Goldman Sachs Group ✦ | 1.28M | -8.1% | $93.50M | 0.0% | ▼ Trim | 4 | SEC ↗ |
| 37 | Goldman Sachs Group ✦ | 1.28M | -8.1% | $93.50M | 0.0% | ▼ Trim | 4 | SEC ↗ |
| 38 | Citadel Advisors ✦ | 1.05M | +47.4% | $77.01M | 0.0% | ▲ Add | 9 | SEC ↗ |
| 39 | Citadel Advisors ✦ | 1.05M | +47.4% | $77.01M | 0.0% | ▲ Add | 9 | SEC ↗ |
| 40 | MIRAE ASSET GLOBAL ETFS HOLDINGS… | 1.02M | +8.4% | $74.71M | 0.1% | ▲ Add | 3 | SEC ↗ |
| 41 | MIRAE ASSET GLOBAL ETFS HOLDINGS… | 1.02M | +8.4% | $74.71M | 0.1% | ▲ Add | 3 | SEC ↗ |
| 42 | UBS AM, a distinct business unit of… | 817.21K | -16.7% | $59.66M | 0.0% | ▼ Trim | 3 | SEC ↗ |
| 43 | UBS AM, a distinct business unit of… | 817.21K | -16.7% | $59.66M | 0.0% | ▼ Trim | 3 | SEC ↗ |
| 44 | UBS AM, a distinct business unit of… | 817.21K | -16.7% | $59.66M | 0.0% | ▼ Trim | 3 | SEC ↗ |
| 45 | UBS AM, a distinct business unit of… | 817.21K | -16.7% | $59.66M | 0.0% | ▼ Trim | 3 | SEC ↗ |
| 46 | UBS AM, a distinct business unit of… | 817.21K | -16.7% | $59.66M | 0.0% | ▼ Trim | 3 | SEC ↗ |
| 47 | UBS AM, a distinct business unit of… | 817.21K | -16.7% | $59.66M | 0.0% | ▼ Trim | 3 | SEC ↗ |
| 48 | UBS AM, a distinct business unit of… | 817.21K | -16.7% | $59.66M | 0.0% | ▼ Trim | 3 | SEC ↗ |
| 49 | UBS AM, a distinct business unit of… | 817.21K | -16.7% | $59.66M | 0.0% | ▼ Trim | 3 | SEC ↗ |
| 50 | UBS AM, a distinct business unit of… | 817.21K | -16.7% | $59.66M | 0.0% | ▼ Trim | 3 | SEC ↗ |
| 51 | UBS AM, a distinct business unit of… | 817.21K | -16.7% | $59.66M | 0.0% | ▼ Trim | 3 | SEC ↗ |
| 52 | Geode Capital Management ✦ (passive) | 718.60K | +17.0% | $52.47M | 0.0% | ▲ Add | 9 | SEC ↗ |
| 53 | Geode Capital Management ✦ (passive) | 718.60K | +17.0% | $52.47M | 0.0% | ▲ Add | 9 | SEC ↗ |
| 54 | Balyasny Asset Management L.P. | 625.86K | +69.3% | $45.69M | 0.1% | ▲ Add | 2 | SEC ↗ |
| 55 | Nuveen, LLC | 446.48K | -20.9% | $32.59M | 0.0% | ▼ Trim | 3 | SEC ↗ |
| 56 | Nuveen, LLC | 446.48K | -20.9% | $32.59M | 0.0% | ▼ Trim | 3 | SEC ↗ |
| 57 | Nuveen, LLC | 446.48K | -20.9% | $32.59M | 0.0% | ▼ Trim | 3 | SEC ↗ |
| 58 | Nuveen, LLC | 446.48K | -20.9% | $32.59M | 0.0% | ▼ Trim | 3 | SEC ↗ |
| 59 | Morgan Stanley ✦ | 437.57K | -10.1% | $31.94M | 0.0% | ▼ Trim | 4 | SEC ↗ |
| 60 | Morgan Stanley ✦ | 437.57K | -10.1% | $31.94M | 0.0% | ▼ Trim | 4 | SEC ↗ |
| 61 | Morgan Stanley ✦ | 437.57K | -10.1% | $31.94M | 0.0% | ▼ Trim | 4 | SEC ↗ |
| 62 | Morgan Stanley ✦ | 437.57K | -10.1% | $31.94M | 0.0% | ▼ Trim | 4 | SEC ↗ |
| 63 | Morgan Stanley ✦ | 437.57K | -10.1% | $31.94M | 0.0% | ▼ Trim | 4 | SEC ↗ |
| 64 | Morgan Stanley ✦ | 437.57K | -10.1% | $31.94M | 0.0% | ▼ Trim | 4 | SEC ↗ |
| 65 | Morgan Stanley ✦ | 437.57K | -10.1% | $31.94M | 0.0% | ▼ Trim | 4 | SEC ↗ |
| 66 | Morgan Stanley ✦ | 437.57K | -10.1% | $31.94M | 0.0% | ▼ Trim | 4 | SEC ↗ |
| 67 | Morgan Stanley ✦ | 437.57K | -10.1% | $31.94M | 0.0% | ▼ Trim | 4 | SEC ↗ |
| 68 | Morgan Stanley ✦ | 437.57K | -10.1% | $31.94M | 0.0% | ▼ Trim | 4 | SEC ↗ |
| 69 | Morgan Stanley ✦ | 437.57K | -10.1% | $31.94M | 0.0% | ▼ Trim | 4 | SEC ↗ |
| 70 | UBS Group AG | 431.63K | -46.8% | $31.51M | 0.0% | ▼ Trim | 3 | SEC ↗ |
| 71 | UBS Group AG | 431.63K | -46.8% | $31.51M | 0.0% | ▼ Trim | 3 | SEC ↗ |
| 72 | UBS Group AG | 431.63K | -46.8% | $31.51M | 0.0% | ▼ Trim | 3 | SEC ↗ |
| 73 | Schroder Investment Management Group | 375.89K | +0.4% | $28.09M | 0.0% | ▲ Add | 2 | SEC ↗ |
| 74 | Millennium Management ✦ | 366.07K | +330.7% | $26.72M | 0.0% | ▲ Add | 9 | SEC ↗ |
| 75 | Fidelity (FMR) ✦ | 361.24K | -72.5% | $26.37M | 0.0% | ▼ Trim | 5 | SEC ↗ |
| 76 | Fidelity (FMR) ✦ | 361.24K | -72.5% | $26.37M | 0.0% | ▼ Trim | 5 | SEC ↗ |
| 77 | Fidelity (FMR) ✦ | 361.24K | -72.5% | $26.37M | 0.0% | ▼ Trim | 5 | SEC ↗ |
| 78 | Fidelity (FMR) ✦ | 361.24K | -72.5% | $26.37M | 0.0% | ▼ Trim | 5 | SEC ↗ |
| 79 | Fidelity (FMR) ✦ | 361.24K | -72.5% | $26.37M | 0.0% | ▼ Trim | 5 | SEC ↗ |
| 80 | Qube Research & Technologies Ltd | 321.72K | New | $23.49M | 0.0% | New | 1 | SEC ↗ |
| 81 | Charles Schwab Investment… | 318.82K | +2.3% | $23.27M | 0.0% | ▲ Add | 3 | SEC ↗ |
| 82 | Charles Schwab Investment… | 318.82K | +2.3% | $23.27M | 0.0% | ▲ Add | 3 | SEC ↗ |
| 83 | Northern Trust Corp | 262.93K | -2.3% | $19.19M | 0.0% | ▼ Trim | 3 | SEC ↗ |
| 84 | Northern Trust Corp | 262.93K | -2.3% | $19.19M | 0.0% | ▼ Trim | 3 | SEC ↗ |
| 85 | Northern Trust Corp | 262.93K | -2.3% | $19.19M | 0.0% | ▼ Trim | 3 | SEC ↗ |
| 86 | Northern Trust Corp | 262.93K | -2.3% | $19.19M | 0.0% | ▼ Trim | 3 | SEC ↗ |
| 87 | Bank Of America Corp /De/ | 232.21K | -2.0% | $16.95M | 0.0% | ▼ Trim | 3 | SEC ↗ |
| 88 | Bank Of America Corp /De/ | 232.21K | -2.0% | $16.95M | 0.0% | ▼ Trim | 3 | SEC ↗ |
| 89 | Bank Of America Corp /De/ | 232.21K | -2.0% | $16.95M | 0.0% | ▼ Trim | 3 | SEC ↗ |
| 90 | ProShare Advisors LLC | 228.32K | -22.8% | $16.67M | 0.0% | ▼ Trim | 3 | SEC ↗ |
| 91 | Norges Bank ✦ (passive) | 214.10K | New | $15.63M | 0.0% | New | 1 | SEC ↗ |
| 92 | D. E. Shaw & Co. ✦ | 200.53K | -14.0% | $14.64M | 0.0% | ▼ Trim | 8 | SEC ↗ |
| 93 | D. E. Shaw & Co. ✦ | 200.53K | -14.0% | $14.64M | 0.0% | ▼ Trim | 8 | SEC ↗ |
| 94 | Russell Investments Group, Ltd. | 194.36K | +117.5% | $14.19M | 0.0% | ▲ Add | 3 | SEC ↗ |
| 95 | Russell Investments Group, Ltd. | 194.36K | +117.5% | $14.19M | 0.0% | ▲ Add | 3 | SEC ↗ |
| 96 | Russell Investments Group, Ltd. | 194.36K | +117.5% | $14.19M | 0.0% | ▲ Add | 3 | SEC ↗ |
| 97 | Russell Investments Group, Ltd. | 194.36K | +117.5% | $14.19M | 0.0% | ▲ Add | 3 | SEC ↗ |
| 98 | Russell Investments Group, Ltd. | 194.36K | +117.5% | $14.19M | 0.0% | ▲ Add | 3 | SEC ↗ |
| 99 | Russell Investments Group, Ltd. | 194.36K | +117.5% | $14.19M | 0.0% | ▲ Add | 3 | SEC ↗ |
| 100 | Russell Investments Group, Ltd. | 194.36K | +117.5% | $14.19M | 0.0% | ▲ Add | 3 | SEC ↗ |
“Their weight” = the position's share of that manager's reported 13F equity value — the conviction measure. ✦ = curated manager.
New buyers
| Qube Research & Technologies… | $23.49M | 0.0% |
| Norges Bank | $15.63M | 0.0% |
Exited
| Holocene Advisors, LP | $85.28M | was 0.2% |
| Boston Partners | $3.70M | was 0.0% |
| California Public Employees… | $2.92M | was 0.0% |
| Duquesne Family Office | $2.48M | was 0.1% |
| Nomura Asset Management… | $1.62M | was 0.0% |
| First Eagle Investment… | $831,524 | was 0.0% |
| Raymond James Financial Inc | $342,406 | was 0.0% |
| Voya Investment Management Llc | $284,574 | was 0.0% |
| HighTower Advisors, LLC | $269,270 | was 0.0% |
| Prudential Financial Inc | $260,275 | was 0.0% |
| Amundi | $233,290 | was 0.0% |
| Walleye Trading LLC | $60,045 | 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.
Frequently co-owned
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)
Aug 11
Chao Albert
Officer, Director · 7.49K sh · $596,873
Aug 11
Chao Albert
Officer, Director · 31.38K sh · $2.52M
Awards, exercises and tax withholding are never counted as buys or sales here. Methodology
Provenance: Ownership from parsed 13F common-stock positions (tracked universe, comparable sets for changes); insider rows from Forms 3/4/5; stakes from Schedules 13D/13G; every filing links to its original on SEC EDGAR.
Reporting period: Q2 2026 ·
Methodology ·
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