Westlake Corp
WLK- Exchange
- NYSE
- Industry
- Industrial Organic Chemicals
- SEC CIK
- 0001262823
In the last 90 days, Westlake Corp insiders filed 0 open-market purchases and 1 sale; 360 institutions reported holding it in 13F filings for Q2 2026, worth $2.90B in total; no superinvestor holds it.
13F holders, Q4 2025
Institutional positions in Westlake Corp as of Dec 31, 2025. Investment managers with $100 million or more in US stocks report their long positions on Form 13F within 45 days after each quarter ends. How 13F works
- Institutional holders
- 298
- −1 vs. Q3 2025
- Shares held
- 46.4M
- +4.91M (+11.8%) vs. Q3 2025
- Total value
- $3.43B
- +$234.7M (+7.3%) vs. Q3 2025
- New holders
- 63
- 93 more added
- Sold out
- 64
- 112 more reduced
6 institutions that held it in Q3 2025 haven't filed for Q4 2025 yet. Not filing isn't selling, so they aren't counted as sold out or in the changes above.
Compare with Q3 2025: new holders, sold out and not filed yet
Holders and value by quarter
Institutions reporting WLK on Form 13F each quarter since Q1 2021, and the total value they reported. Values are as of each quarter end, so they also move with the share price.
| Quarter | Holders | Value |
|---|---|---|
| Q2 2026 | 360 | $2.90B |
| Q1 2026 | 339 | $5.15B |
| Q4 2025 | 298 | $3.43B |
| Q3 2025 | 305 | $3.20B |
| Q2 2025 | 306 | $2.99B |
| Q1 2025 | 361 | $3.64B |
| Q4 2024 | 378 | $4.04B |
| Q3 2024 | 403 | $5.08B |
| Q2 2024 | 382 | $4.93B |
| Q1 2024 | 347 | $5.29B |
| Q4 2023 | 357 | $5.04B |
| Q3 2023 | 335 | $4.64B |
| Q2 2023 | 340 | $4.42B |
| Q1 2023 | 342 | $4.40B |
| Q4 2022 | 344 | $3.73B |
| Q3 2022 | 321 | $3.03B |
| Q2 2022 | 355 | $3.50B |
| Q1 2022 | 328 | $4.38B |
| Q4 2021 | 298 | $3.37B |
| Q3 2021 | 272 | $3.15B |
| Q2 2021 | 276 | $3.02B |
| Q1 2021 | 240 | $3.09B |
Institutions, Q4 2025
Shares, value and share of portfolio for each institution holding Westlake Corp; share changes are against Q3 2025.
| Institution | Shares | Value | % of portfolio | Change in shares | Action |
|---|---|---|---|---|---|
| Orbis Allan Gray Ltd | 4,386,635 | $324.3M | 1.36% | +472,224+12.1% | Added |
| Wellington Management Group LLP | 4,220,717 | $312.1M | 0.05% | +4,163,207+7,239.1% | Added |
| Vanguard Group Inc | 3,917,329 | $289.6M | 0.00% | +477,698+13.9% | Added |
| BlackRock, Inc. | 3,261,433 | $241.2M | 0.00% | +75,697+2.4% | Added |
| Price T Rowe Associates Inc | 2,208,715 | $163.3M | 0.02% | +5720.0% | Added |
| Capital World Investors | 2,171,324 | $160.5M | 0.02% | +2,171,324 | New |
| Dimensional Fund Advisors LP | 1,885,678 | $139.4M | 0.03% | +585,438+45.0% | Added |
| Brandes Investment Partners, LP | 1,670,327 | $123.5M | 0.94% | +121,633+7.9% | Added |
| State Street Corp | 1,396,633 | $103.3M | 0.00% | +101,391+7.8% | Added |
| Holocene Advisors, LP | 1,220,622 | $90.3M | 0.19% | +366,438+42.9% | Added |
| Victory Capital Management Inc | 1,113,819 | $82.4M | 0.05% | −1,752,541−61.1% | Reduced |
| UBS Asset Management Americas Inc | 924,704 | $68.4M | 0.01% | +7,431+0.8% | Added |
| Mirae Asset Global ETFs Holdings Ltd. | 876,885 | $64.8M | 0.10% | +20,909+2.4% | Added |
| Morgan Stanley | 759,623 | $56.2M | 0.00% | −56,006−6.9% | Reduced |
| Goldman Sachs Group Inc | 753,953 | $55.7M | 0.01% | −297,444−28.3% | Reduced |
| Jacobs Levy Equity Management, Inc | 668,405 | $49.4M | 0.19% | −192,318−22.3% | Reduced |
| Nuveen, LLC | 652,909 | $48.3M | 0.01% | −33,630−4.9% | Reduced |
| UBS Group AG | 648,012 | $47.9M | 0.01% | +87,532+15.6% | Added |
| Woodline Partners LP | 628,159 | $46.4M | 0.18% | +434,373+224.2% | Added |
| Geode Capital Management, LLC | 594,922 | $44.0M | 0.00% | −58,164−8.9% | Reduced |
| Thompson Siegel & Walmsley LLC | 536,290 | $39.7M | 0.67% | +94,950+21.5% | Added |
| Allspring Global Investments Holdings, LLC | 506,756 | $37.6M | 0.06% | −39,395−7.2% | Reduced |
| D. E. Shaw & Co., Inc. | 486,281 | $36.0M | 0.03% | +326,272+203.9% | Added |
| ProShare Advisors LLC | 435,261 | $32.2M | 0.06% | +12,621+3.0% | Added |
| Millennium Management LLC | 427,754 | $31.6M | 0.02% | +321,434+302.3% | Added |
| Erste Asset Management GmbH | 420,000 | $31.1M | 0.26% | +160,000+61.5% | Added |
| Antipodes Partners Ltd | 416,520 | $30.8M | 0.65% | −139,384−25.1% | Reduced |
| Merewether Investment Management, LP | 388,100 | $28.7M | 0.66% | +119,700+44.6% | Added |
| Voloridge Investment Management, LLC | 348,953 | $25.8M | 0.09% | −45,354−11.5% | Reduced |
| Janus Henderson Group PLC | 334,593 | $24.7M | 0.01% | −31,391−8.6% | Reduced |
| New York State Common Retirement Fund | 309,626 | $22.9M | 0.03% | 00.0% | Unchanged |
| Charles Schwab Investment Management Inc | 297,248 | $22.0M | 0.00% | +24,286+8.9% | Added |
| Engineers Gate Manager LP | 289,255 | $21.4M | 0.25% | +289,255 | New |
| Northern Trust Corp | 268,634 | $19.9M | 0.00% | +30,495+12.8% | Added |
| Robotti Robert | 256,244 | $18.9M | 3.40% | +74,393+40.9% | Added |
| Kempen Capital Management N.V. | 235,919 | $17.4M | 0.15% | +39,876+20.3% | Added |
| Ceredex Value Advisors LLC | 235,618 | $17.4M | 0.52% | +235,618 | New |
| FMR LLC | 228,843 | $16.9M | 0.00% | −85,507−27.2% | Reduced |
| Invesco Ltd. | 213,157 | $15.8M | 0.00% | +78,458+58.2% | Added |
| Deprince Race & Zollo Inc | 204,226 | $15.1M | 0.29% | +15,217+8.1% | Added |
| Citadel Advisors LLC | 203,303 | $15.0M | 0.01% | −997,548−83.1% | Reduced |
| Two Sigma Investments, LP | 198,379 | $14.7M | 0.02% | +95,414+92.7% | Added |
| Diamond Hill Capital Management Inc | 190,180 | $14.1M | 0.07% | +190,180 | New |
| Bank of America Corp | 184,435 | $13.6M | 0.00% | −24,462−11.7% | Reduced |
| Norges Bank | 181,328 | $13.4M | 0.00% | +181,328 | New |
| Bank of New York Mellon Corp | 174,318 | $12.9M | 0.00% | −3,664−2.1% | Reduced |
| Teachers Retirement System of the State of Kentucky | 165,315 | $12.2M | 0.09% | 00.0% | Unchanged |
| Russell Investments Group, Ltd. | 158,321 | $11.7M | 0.01% | −26,310−14.3% | Reduced |
| ExodusPoint Capital Management, LP | 154,391 | $11.4M | 0.13% | +154,391 | New |
| First Trust Advisors LP | 146,411 | $10.8M | 0.01% | −18,525−11.2% | Reduced |
| Two Sigma Advisers, LP | 144,700 | $10.7M | 0.02% | +71,000+96.3% | Added |
| Sprott Inc. | 140,000 | $10.4M | 0.37% | +10,000+7.7% | Added |
| Cerity Partners LLC | 127,095 | $9.40M | 0.01% | +44,016+53.0% | Added |
| Quantinno Capital Management LP | 116,366 | $8.60M | 0.02% | +51,131+78.4% | Added |
| Thomist Capital Management, LP | 111,900 | $8.36M | 2.28% | +65,700+142.2% | Added |
| Federated Hermes, Inc. | 107,730 | $7.97M | 0.01% | +104,701+3,456.6% | Added |
| Alyeska Investment Group, L.P. | 103,041 | $7.62M | 0.02% | −16,945−14.1% | Reduced |
| BNP Paribas Arbitrage, SA | 92,223 | $6.82M | 0.00% | −98,743−51.7% | Reduced |
| Wells Fargo & Company | 91,879 | $6.79M | 0.00% | −5,250−5.4% | Reduced |
| Natixis | 87,872 | $6.50M | 0.03% | +87,872 | New |
| Rhumbline Advisers | 85,432 | $6.32M | 0.01% | −3,427−3.9% | Reduced |
| Royal Bank of Canada | 85,270 | $6.30M | 0.00% | −296,316−77.7% | Reduced |
| Swiss National Bank | 75,900 | $5.61M | 0.00% | +75,900 | New |
| Recurrent Investment Advisors LLC | 75,633 | $5.59M | 0.41% | +57,527+317.7% | Added |
| Select Equity Group, L.P. | 74,997 | $5.55M | 0.03% | +74,997 | New |
| Lazard Asset Management LLC | 74,428 | $5.50M | 0.01% | +1,806+2.5% | Added |
| Agman Capital LLC | 72,283 | $5.34M | 4.55% | +72,283 | New |
| Principal Financial Group Inc | 71,719 | $5.30M | 0.00% | −2,394−3.2% | Reduced |
| Alliancebernstein L.P. | 68,448 | $5.06M | 0.00% | +1,686+2.5% | Added |
| JPMorgan Chase & Co | 67,320 | $4.98M | 0.00% | −90,474−57.3% | Reduced |
| Barclays PLC | 66,613 | $4.93M | 0.00% | −35,049−34.5% | Reduced |
| PDT Partners, LLC | 64,977 | $4.80M | 0.31% | +45,457+232.9% | Added |
| Jain Global LLC | 62,043 | $4.59M | 0.04% | +49,626+399.7% | Added |
| Legal & General Group Plc | 57,251 | $4.23M | 0.00% | +20,619+56.3% | Added |
| HITE Hedge Asset Management LLC | 52,153 | $3.86M | 0.25% | −47,847−47.8% | Reduced |
| CI Private Wealth, LLC | 50,715 | $3.75M | 0.01% | +17,689+53.6% | Added |
| Ameriprise Financial Inc | 49,117 | $3.63M | 0.00% | −35,320−41.8% | Reduced |
| Walleye Capital LLC | 47,657 | $3.52M | 0.02% | −100,660−67.9% | Reduced |
| California Public Employees Retirement System | 46,760 | $3.46M | 0.00% | −24−0.1% | Reduced |
| Wedge Capital Management L L P | 42,841 | $3.17M | 0.06% | +3,466+8.8% | Added |
| Retirement Systems of Alabama | 40,027 | $2.96M | 0.01% | −288−0.7% | Reduced |
| Quantbot Technologies LP | 39,607 | $2.93M | 0.10% | −17,178−30.3% | Reduced |
| SG Americas Securities, LLC | 37,011 | $2.74M | 0.00% | +30,072+433.4% | Added |
| California State Teachers Retirement System | 36,098 | $2.67M | 0.00% | +34,009+1,628.0% | Added |
| VARCOV Co. | 35,597 | $2.63M | 1.04% | +35,597 | New |
| Luminus Management LLC | 35,189 | $2.60M | 2.40% | +35,189 | New |
| Manufacturers Life Insurance Company, The | 33,451 | $2.47M | 0.00% | +5,371+19.1% | Added |
| Hudson Bay Capital Management LP | 30,443 | $2.25M | 0.01% | +26,947+770.8% | Added |
| Comerica Bank | 28,483 | $2.11M | 0.01% | +221+0.8% | Added |
| SEI Investments Co | 28,442 | $2.10M | 0.00% | +13,675+92.6% | Added |
| Envestnet Asset Management Inc | 27,870 | $2.06M | 0.00% | +424+1.5% | Added |
| Aventail Capital Group, LP | 27,764 | $2.05M | 0.12% | −50,576−64.6% | Reduced |
| Citigroup Inc | 27,337 | $2.02M | 0.00% | −89,814−76.7% | Reduced |
| Bank of Montreal | 26,923 | $1.99M | 0.00% | −18,242−40.4% | Reduced |
| Verition Fund Management LLC | 26,078 | $1.93M | 0.01% | −1,077−4.0% | Reduced |
| State of Wisconsin Investment Board | 25,711 | $1.90M | 0.00% | +25,711 | New |
| Occudo Quantitative Strategies LP | 25,180 | $1.86M | 0.12% | −2,232−8.1% | Reduced |
| State Board of Administration of Florida Retirement System | 24,115 | $1.78M | 0.00% | 00.0% | Unchanged |
| Susquehanna International Group, LLP | 23,801 | $1.76M | 0.00% | +14,957+169.1% | Added |
| AMG National Trust Bank | 23,330 | $1.73M | 0.04% | +23,330 | New |