Security record
WLK
Westlake Corporation · Basic Materials · Chemicals - Specialty
108Tracked holders
+6Δ holders
28.25MShares held
$2.07BReported value
+17New positions
−13Exits
Momentum inputs (comparable managers):
holder breadth +5.9% ·
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 | +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 | — | — |
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 ↗ ×18 |
| 2 | Capital World Investors ✦ | 2.84M | -32.5% | $207.49M | 0.0% | ▼ Trim | 3 | SEC ↗ |
| 3 | T. Rowe Price ✦ | 2.21M | -8.3% | $161.09M | 0.0% | ▼ Trim | 9 | SEC ↗ ×2 |
| 4 | Dimensional Fund Advisors Lp | 2.05M | +39.9% | $149.78M | 0.0% | ▲ Add | 3 | SEC ↗ ×5 |
| 5 | AQR Capital Management ✦ | 1.57M | +503.9% | $114.64M | 0.0% | ▲ Add | 9 | SEC ↗ ×5 |
| 6 | Vanguard Capital Management Llc | 1.46M | +0.6% | $106.89M | 0.0% | ▲ Add | 2 | SEC ↗ |
| 7 | State Street Global Advisors ✦ (passive) | 1.45M | +5.3% | $106.10M | 0.0% | ▲ Add | 7 | SEC ↗ |
| 8 | Goldman Sachs Group ✦ | 1.28M | -8.1% | $93.50M | 0.0% | ▼ Trim | 4 | SEC ↗ ×4 |
| 9 | Citadel Advisors ✦ | 1.05M | +47.4% | $77.01M | 0.0% | ▲ Add | 9 | SEC ↗ ×2 |
| 10 | MIRAE ASSET GLOBAL ETFS HOLDINGS… | 1.02M | +8.4% | $74.71M | 0.1% | ▲ Add | 3 | SEC ↗ ×2 |
| 11 | UBS AM, a distinct business unit of… | 817.21K | -16.7% | $59.66M | 0.0% | ▼ Trim | 3 | SEC ↗ ×10 |
| 12 | Geode Capital Management ✦ (passive) | 718.60K | +17.0% | $52.47M | 0.0% | ▲ Add | 9 | SEC ↗ ×2 |
| 13 | Balyasny Asset Management L.P. | 625.86K | +69.3% | $45.69M | 0.1% | ▲ Add | 2 | SEC ↗ |
| 14 | Nuveen, LLC | 446.48K | -20.9% | $32.59M | 0.0% | ▼ Trim | 3 | SEC ↗ ×4 |
| 15 | Morgan Stanley ✦ | 437.57K | -10.1% | $31.94M | 0.0% | ▼ Trim | 4 | SEC ↗ ×11 |
| 16 | UBS Group AG | 431.63K | -46.8% | $31.51M | 0.0% | ▼ Trim | 3 | SEC ↗ ×3 |
| 17 | Schroder Investment Management Group | 375.89K | +0.4% | $28.09M | 0.0% | ▲ Add | 2 | SEC ↗ |
| 18 | Millennium Management ✦ | 366.07K | +330.7% | $26.72M | 0.0% | ▲ Add | 9 | SEC ↗ |
| 19 | Fidelity (FMR) ✦ | 361.24K | -72.5% | $26.37M | 0.0% | ▼ Trim | 5 | SEC ↗ ×5 |
| 20 | Qube Research & Technologies Ltd | 321.72K | New | $23.49M | 0.0% | New | 1 | SEC ↗ |
| 21 | Charles Schwab Investment… | 318.82K | +2.3% | $23.27M | 0.0% | ▲ Add | 3 | SEC ↗ ×2 |
| 22 | Northern Trust Corp | 262.93K | -2.3% | $19.19M | 0.0% | ▼ Trim | 3 | SEC ↗ ×4 |
| 23 | Bank Of America Corp /De/ | 232.21K | -2.0% | $16.95M | 0.0% | ▼ Trim | 3 | SEC ↗ ×3 |
| 24 | ProShare Advisors LLC | 228.32K | -22.8% | $16.67M | 0.0% | ▼ Trim | 3 | SEC ↗ |
| 25 | Norges Bank ✦ (passive) | 214.10K | New | $15.63M | 0.0% | New | 1 | SEC ↗ |
| 26 | D. E. Shaw & Co. ✦ | 200.53K | -14.0% | $14.64M | 0.0% | ▼ Trim | 8 | SEC ↗ ×2 |
| 27 | Russell Investments Group, Ltd. | 194.36K | +117.5% | $14.19M | 0.0% | ▲ Add | 3 | SEC ↗ ×12 |
| 28 | Invesco Ltd. | 190.95K | +6.4% | $13.94M | 0.0% | ▲ Add | 3 | SEC ↗ ×6 |
| 29 | JPMorgan Chase ✦ | 163.29K | +67.1% | $12.30M | 0.0% | ▲ Add | 4 | SEC ↗ ×8 |
| 30 | Cerity Partners LLC | 166.44K | +129.0% | $12.15M | 0.0% | ▲ Add | 3 | SEC ↗ ×3 |
| 31 | Bank of New York Mellon Corp | 163.46K | -9.7% | $11.93M | 0.0% | ▼ Trim | 3 | SEC ↗ ×13 |
| 32 | Allspring Global Investments… | 163.07K | -42.9% | $11.88M | 0.0% | ▼ Trim | 3 | SEC ↗ ×2 |
| 33 | Wellington Management ✦ | 141.82K | -92.1% | $10.35M | 0.0% | ▼ Trim | 4 | SEC ↗ ×3 |
| 34 | Quantinno Capital Management LP | 123.23K | +1.5% | $9.00M | 0.0% | ▲ Add | 3 | SEC ↗ |
| 35 | Hrt Financial Lp | 116.39K | New | $8.50M | 0.0% | New | 1 | SEC ↗ |
| 36 | Marshall Wace ✦ | 111.57K | New | $8.14M | 0.0% | New | 1 | SEC ↗ ×3 |
| 37 | Tudor Investment Corp Et Al | 110.71K | New | $8.08M | 0.0% | New | 1 | SEC ↗ |
| 38 | Assenagon Asset Management S.A. | 110.58K | New | $8.07M | 0.0% | New | 1 | SEC ↗ ×2 |
| 39 | Wells Fargo & Company/Mn | 105.94K | -0.7% | $7.73M | 0.0% | ▼ Trim | 3 | SEC ↗ ×4 |
| 40 | Alliancebernstein L.P. | 65.99K | -2.0% | $7.71M | 0.0% | ▼ Trim | 3 | SEC ↗ |
| 41 | Mackenzie Financial Corp | 104.90K | +45.8% | $7.66M | 0.0% | ▲ Add | 3 | SEC ↗ |
| 42 | Royal Bank Of Canada | 96.77K | -6.9% | $7.07M | 0.0% | ▼ Trim | 3 | SEC ↗ ×7 |
| 43 | Bnp Paribas Financial Markets | 94.40K | +1311.1% | $6.89M | 0.0% | ▲ Add | 3 | SEC ↗ |
| 44 | Point72 Asset Management ✦ | 89.73K | New | $6.55M | 0.0% | New | 1 | SEC ↗ |
| 45 | Rhumbline Advisers | 86.31K | -1.1% | $6.30M | 0.0% | ▼ Trim | 3 | SEC ↗ |
| 46 | Squarepoint Ops LLC | 79.97K | +107.5% | $5.84M | 0.0% | ▲ Add | 2 | SEC ↗ |
| 47 | Tidal Investments LLC | 76.06K | +59.0% | $5.55M | 0.0% | ▲ Add | 2 | SEC ↗ |
| 48 | Principal Financial Group Inc | 75.65K | +1.6% | $5.52M | 0.0% | ▲ Add | 3 | SEC ↗ ×2 |
| 49 | Swiss National Bank | 64.20K | -15.4% | $4.69M | 0.0% | ▼ Trim | 3 | SEC ↗ |
| 50 | Legal & General Group Plc | 50.02K | -1.4% | $3.65M | 0.0% | ▼ Trim | 3 | SEC ↗ ×3 |
| 51 | Mariner, LLC | 47.32K | New | $3.45M | 0.0% | New | 1 | SEC ↗ |
| 52 | Two Sigma Investments ✦ | 45.36K | New | $3.31M | 0.0% | New | 1 | SEC ↗ |
| 53 | New York State Common Retirement… | 40.93K | -86.8% | $2.99M | 0.0% | ▼ Trim | 3 | SEC ↗ |
| 54 | Manufacturers Life Insurance… | 37.16K | +11.6% | $2.71M | 0.0% | ▲ Add | 3 | SEC ↗ |
| 55 | Citigroup Inc | 36.57K | -33.0% | $2.67M | 0.0% | ▼ Trim | 3 | SEC ↗ ×2 |
| 56 | State Of Wisconsin Investment Board | 35.82K | +41.9% | $2.62M | 0.0% | ▲ Add | 3 | SEC ↗ |
| 57 | Bank Of Montreal /Can/ | 35.59K | -8.8% | $2.60M | 0.0% | ▼ Trim | 3 | SEC ↗ ×5 |
| 58 | Ameriprise Financial Inc | 31.29K | +9.8% | $2.28M | 0.0% | ▲ Add | 3 | SEC ↗ ×2 |
| 59 | Envestnet Asset Management Inc | 29.59K | +5.5% | $2.16M | 0.0% | ▲ Add | 3 | SEC ↗ |
| 60 | First Trust Advisors Lp | 27.50K | -73.1% | $2.01M | 0.0% | ▼ Trim | 3 | SEC ↗ |
| 61 | Barclays Plc | 26.52K | +83.5% | $1.94M | 0.0% | ▲ Add | 3 | SEC ↗ ×3 |
| 62 | Mercer Global Advisors Inc /Adv | 26.48K | +363.1% | $1.93M | 0.0% | ▲ Add | 3 | SEC ↗ |
| 63 | Susquehanna International Group, Llp | 26.16K | +74.4% | $1.91M | 0.0% | ▲ Add | 3 | SEC ↗ |
| 64 | Stifel Financial Corp | 26.13K | +4.8% | $1.91M | 0.0% | ▲ Add | 3 | SEC ↗ ×3 |
| 65 | National Bank Of Canada /Fi/ | 25.92K | +14144.0% | $1.89M | 0.0% | ▲ Add | 3 | SEC ↗ ×2 |
| 66 | Man Group plc | 25.70K | -84.0% | $1.88M | 0.0% | ▼ Trim | 2 | SEC ↗ |
| 67 | Creative Planning | 25.59K | +114.0% | $1.87M | 0.0% | ▲ Add | 3 | SEC ↗ ×2 |
| 68 | American Century Companies Inc | 24.16K | +20.7% | $1.76M | 0.0% | ▲ Add | 3 | SEC ↗ |
| 69 | State Board Of Administration Of… | 23.50K | -2.5% | $1.72M | 0.0% | ▼ Trim | 3 | SEC ↗ |
| 70 | Hsbc Holdings Plc | 23.27K | New | $1.70M | 0.0% | New | 1 | SEC ↗ ×2 |
| 71 | Jane Street Group, Llc | 21.76K | -79.4% | $1.59M | 0.0% | ▼ Trim | 2 | SEC ↗ ×2 |
| 72 | Zurcher Kantonalbank (Zurich… | 19.17K | 0.0% | $1.40M | 0.0% | Held | 3 | SEC ↗ |
| 73 | Wealth Enhancement Advisory… | 21.70K | +738.4% | $1.40M | 0.0% | ▲ Add | 2 | SEC ↗ |
| 74 | Mitsubishi UFJ Asset Management… | 16.91K | +50.1% | $1.23M | 0.0% | ▲ Add | 3 | SEC ↗ |
| 75 | Credit Agricole S A | 16.29K | New | $1.19M | 0.0% | New | 1 | SEC ↗ |
| 76 | Storebrand Asset Management As | 15.40K | 0.0% | $1.12M | 0.0% | Held | 3 | SEC ↗ |
| 77 | Gotham Asset Management ✦ | 15.25K | -55.9% | $1.11M | 0.0% | ▼ Trim | 9 | SEC ↗ |
| 78 | LPL Financial LLC | 14.79K | +13.2% | $1.08M | 0.0% | ▲ Add | 3 | SEC ↗ |
| 79 | Canada Pension Plan Investment Board | 14.21K | +543.0% | $1.04M | 0.0% | ▲ Add | 3 | SEC ↗ |
| 80 | Brown Advisory Inc | 13.77K | +518.4% | $1.00M | 0.0% | ▲ Add | 2 | SEC ↗ ×2 |
| 81 | Universal- Beteiligungs- und… | 11.64K | -6.7% | $849,574 | 0.0% | ▼ Trim | 3 | SEC ↗ |
| 82 | Sei Investments Co | 10.90K | -14.7% | $795,471 | 0.0% | ▼ Trim | 3 | SEC ↗ ×2 |
| 83 | Fifth Third Bancorp | 10.58K | -34.1% | $772,230 | 0.0% | ▼ Trim | 3 | SEC ↗ |
| 84 | Healthcare Of Ontario Pension Plan… | 9.37K | New | $684,010 | 0.0% | New | 1 | SEC ↗ |
| 85 | Captrust Financial Advisors | 8.09K | New | $590,359 | 0.0% | New | 1 | SEC ↗ |
| 86 | Corient Private Wealth LP | 5.95K | -83.0% | $434,423 | 0.0% | ▼ Trim | 3 | SEC ↗ |
| 87 | Pictet Asset Management Holding SA | 5.48K | -9.5% | $400,259 | 0.0% | ▼ Trim | 3 | SEC ↗ |
| 88 | Focus Partners Wealth | 5.31K | New | $387,780 | 0.0% | New | 1 | SEC ↗ |
| 89 | Victory Capital Management Inc | 5.30K | -88.4% | $386,681 | 0.0% | ▼ Trim | 3 | SEC ↗ |
| 90 | Daiwa Securities Group Inc. | 4.79K | New | $349,305 | 0.0% | New | 1 | SEC ↗ |
| 91 | Capstone Investment Advisors, Llc | 4.72K | -96.5% | $344,633 | 0.0% | ▼ Trim | 3 | SEC ↗ |
| 92 | Arrowstreet Capital ✦ | 4.03K | New | $294,263 | 0.0% | New | 1 | SEC ↗ |
| 93 | CIBC Asset Management Inc | 3.98K | 0.0% | $290,321 | 0.0% | Held | 3 | SEC ↗ |
| 94 | Pacer Advisors, Inc. | 3.76K | -2.3% | $274,000 | 0.0% | ▼ Trim | 3 | SEC ↗ |
| 95 | GAMCO Investors ✦ | 3.49K | 0.0% | $254,843 | 0.0% | Held | 5 | SEC ↗ |
| 96 | Cetera Investment Advisers | 3.44K | -12.3% | $250,920 | 0.0% | ▼ Trim | 3 | SEC ↗ |
| 97 | Federated Hermes, Inc. | 2.57K | -99.0% | $187,902 | 0.0% | ▼ Trim | 3 | SEC ↗ |
| 98 | Deutsche Bank Ag\ | 2.17K | -8.5% | $158,337 | 0.0% | ▼ Trim | 3 | SEC ↗ ×2 |
| 99 | Us Bancorp \De\ | 1.98K | -8.8% | $144,467 | 0.0% | ▼ Trim | 3 | SEC ↗ ×2 |
| 100 | Mitsubishi UFJ Trust & Banking Corp | 1.72K | New | $125,779 | 0.0% | New | 1 | 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% |
| Hrt Financial Lp | $8.50M | 0.0% |
| Marshall Wace | $8.14M | 0.0% |
| Tudor Investment Corp Et Al | $8.08M | 0.0% |
| Assenagon Asset Management… | $8.07M | 0.0% |
| Point72 Asset Management | $6.55M | 0.0% |
| Mariner, LLC | $3.45M | 0.0% |
| Two Sigma Investments | $3.31M | 0.0% |
| Hsbc Holdings Plc | $1.70M | 0.0% |
| Credit Agricole S A | $1.19M | 0.0% |
| Healthcare Of Ontario Pension… | $684,010 | 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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