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Disclosery

WLK WESTLAKE CORPORATION

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COM (common), issuer CIK 1262823

295 managers (298 13F filers) reported a position in WLK shares at 2025-12-31, 46,401,638 shares in all. 52 filers opened a position and 64 filers sold out during the quarter.

Managers
295
13F filers
298
New
52
Added
93
Reduced
112
Sold out
64
Shares held by filers
46,401,638

Shares held by filers adds up every 13F filer's report, so a share reported by a parent and by its subsidiary counts twice (H9). Managers counts each filer group once.

13D and 13G filers

No 13D or 13G on this security in the data. Structured 13D/G data starts 2024-12-18.

Insider trades

No Form 4 transaction on this security in the data.

13F holders, Q4 2025

Filers in the available 13F reports with a share position at 2025-12-31, filer groups collapsed to one row (method), largest first. Options and principal amounts are left out. A group row states no % of portfolio, since each member reports its own portfolio: the members' percents are listed under it. A value about 1,000 times or 1/1,000 of the price other filers imply is shown as filed but neither ranks the row nor enters a sum.

HolderSharesValue% of portfolioChangeSource
Orbis Allan Gray Ltdin group Orbis Allan Gray Ltd4,386,635$324M1.36%+472,22413F-HRTimelineGroup
WELLINGTON MANAGEMENT GROUP LLPin group WELLINGTON MANAGEMENT GROUP L…4,220,717$312M0.05%+4,163,20713F-HRTimelineGroup
VANGUARD GROUP INCgroup of 2 filers holding3,927,084$290M+478,109Timeline
BlackRock, Inc.in group BlackRock, Inc.3,261,433$241M<0.01%+75,69713F-HRTimelineGroup
PRICE T ROWE ASSOCIATES INC /MD/2,208,715$163M0.02%+57213F-HRTimeline
Capital World Investors2,171,324$161M0.02%new13F-HRTimeline
DIMENSIONAL FUND ADVISORS LPin group DIMENSIONAL FUND ADVISORS LP1,885,678$139M0.03%+585,43813F-HRTimelineGroup
BRANDES INVESTMENT PARTNERS, LPin group BRANDES INVESTMENT PARTNERS, …1,670,327$124M0.94%+121,63313F-HRTimelineGroup
UBS Group AGgroup of 2 filers holding1,572,716$116M+94,963Timeline
STATE STREET CORPin group STATE STREET CORP1,396,633$103M<0.01%+101,39113F-HRTimelineGroup
Holocene Advisors, LP1,220,622$90.3M0.19%+366,43813F-HRTimeline
VICTORY CAPITAL MANAGEMENT INC1,113,819$82.4M0.05%-1,752,54113F-HRTimeline
MIRAE ASSET GLOBAL ETFS HOLDINGS Ltd.in group Mirae Asset Global Investment…876,885$64.8M0.1%+20,90913F-HRTimelineGroup
MORGAN STANLEYin group MORGAN STANLEY759,623$56.2M<0.01%-56,00613F-HR/ATimelineGroup
GOLDMAN SACHS GROUP INCin group GOLDMAN SACHS GROUP INC753,953$55.7M0.01%-297,44413F-HR/ATimelineGroup
JACOBS LEVY EQUITY MANAGEMENT, INC668,405$49.4M0.19%-192,31813F-HRTimeline
Nuveen, LLCin group TIAA652,909$48.3M0.01%-33,63013F-HRTimelineGroup
Woodline Partners LP628,159$46.4M0.18%+434,37313F-HRTimeline
GEODE CAPITAL MANAGEMENT, LLCin group GEODE CAPITAL MANAGEMENT, LLC594,922$44M<0.01%-58,16413F-HRTimelineGroup
THOMPSON SIEGEL & WALMSLEY LLC536,290$39.7M0.67%+94,95013F-HRTimeline
Allspring Global Investments Holdings, …in group Allspring Global Investments …506,756$37.6M0.06%-39,39513F-HRTimelineGroup
D. E. Shaw & Co., Inc.in group D. E. Shaw & Co., Inc.486,281$36M0.03%+326,27213F-HRTimelineGroup
ProShare Advisors LLC435,261$32.2M0.06%+12,62113F-HRTimeline
MILLENNIUM MANAGEMENT LLCin group MILLENNIUM MANAGEMENT LLC427,754$31.6M0.02%+321,43413F-HRTimelineGroup
Erste Asset Management GmbHin group Erste Asset Management GmbH420,000$31.1M0.26%+160,00013F-HRTimelineGroup
ANTIPODES PARTNERS Ltd416,520$30.8M0.65%-139,38413F-HRTimeline
Merewether Investment Management, LP388,100$28.7M0.66%+119,70013F-HRTimeline
VOLORIDGE INVESTMENT MANAGEMENT, LLC348,953$25.8M0.09%-45,35413F-HRTimeline
TWO SIGMA INVESTMENTS, LPgroup of 2 filers holding343,079$25.4M+166,414Timeline
JANUS HENDERSON GROUP PLCin group Janus Henderson334,593$24.7M0.01%-31,39113F-HRTimelineGroup
NEW YORK STATE COMMON RETIREMENT FUND309,626$22.9M0.03%013F-HRTimeline
CHARLES SCHWAB INVESTMENT MANAGEMENT INCin group Charles Schwab Trust Co297,248$22M<0.01%+24,28613F-HRTimelineGroup
Engineers Gate Manager LP289,255$21.4M0.25%new13F-HRTimeline
NORTHERN TRUST CORPin group NORTHERN TRUST CORP268,634$19.9M<0.01%+30,49513F-HRTimelineGroup
ROBOTTI ROBERTin group ROBOTTI ROBERT256,244$18.9M3.4%+74,39313F-HR/ATimelineGroup
VAN LANSCHOT KEMPEN INVESTMENT MANAGEME…235,919$17.4M0.15%+39,87613F-HRTimeline
Ceredex Value Advisors LLC235,618$17.4M0.52%new13F-HRTimeline
FMR LLCin group FMR LLC228,843$16.9M<0.01%-85,50713F-HRTimelineGroup
Invesco Ltd.in group Invesco Ltd.213,157$15.8M<0.01%+78,45813F-HRTimelineGroup
DEPRINCE RACE & ZOLLO INC204,226$15.1M0.29%+15,21713F-HRTimeline
CITADEL ADVISORS LLCin group CITADEL ADVISORS LLC203,303$15M0.01%-997,54813F-HRTimelineGroup
Diamond Hill Capital Management, LLC (I…190,180$14.1M0.07%new13F-HRTimeline
BANK OF AMERICA CORP /DE/in group BANK OF AMERICA CORP /DE/184,435$13.6M<0.01%-24,46213F-HRTimelineGroup
NORGES BANK181,328$13.4M<0.01%new13F-HRTimeline
Bank of New York Mellon Corpin group Bank of New York Mellon Corp174,318$12.9M<0.01%-3,66413F-HRTimelineGroup
TEACHERS RETIREMENT SYSTEM OF THE STATE…165,315$12.2M0.09%013F-HRTimeline
Russell Investments Group, Ltd.in group Russell Investments Group, Lt…158,321$11.7M0.01%-26,31013F-HRTimelineGroup
ExodusPoint Capital Management, LP154,391$11.4M0.13%new13F-HRTimeline
FIRST TRUST ADVISORS LPin group FIRST TRUST ADVISORS LP146,411$10.8M0.01%-18,52513F-HRTimelineGroup
SPROTT INC.140,000$10.4M0.37%+10,00013F-HRTimeline
Cerity Partners LLCin group Cerity Partners LLC127,095$9.4M0.01%+44,01613F-HRTimelineGroup
Quantinno Capital Management LP116,366$8.6M0.02%+51,13113F-HRTimeline
Thomist Capital Management, LP111,900$8.36M2.28%+65,70013F-HRTimeline
FEDERATED HERMES, INC.in group FEDERATED HERMES, INC.107,730$7.97M0.01%+104,70113F-HRTimelineGroup
Alyeska Investment Group, L.P.in group Alyeska Investment Group, L.P.103,041$7.62M0.02%-16,94513F-HRTimelineGroup
BNP PARIBAS FINANCIAL MARKETSin group BNP PARIBAS FINANCIAL MARKETS92,223$6.82M<0.01%-98,74313F-HRTimelineGroup
WELLS FARGO & COMPANY/MNin group WELLS FARGO & COMPANY/MN91,879$6.79M<0.01%-5,25013F-HRTimelineGroup
NATIXISin group Natixis Investment Managers87,872$6.5M0.03%new13F-HRTimelineGroup
RHUMBLINE ADVISERS85,432$6.32M0.01%-3,42713F-HRTimeline
ROYAL BANK OF CANADAin group ROYAL BANK OF CANADA85,270$6.3M<0.01%-296,31613F-HRTimelineGroup
Swiss National Bank75,900$5.61M<0.01%new13F-HRTimeline
Recurrent Investment Advisors LLC75,633$5.59M0.41%+57,52713F-HRTimeline
Select Equity Group, L.P.74,997$5.55M0.03%new13F-HRTimeline
LAZARD ASSET MANAGEMENT LLCin group LAZARD ASSET MANAGEMENT LLC74,428$5.5M0.01%+1,80613F-HRTimelineGroup
AGMAN CAPITAL LLC72,283$5.34M4.55%13F-HRTimeline
PRINCIPAL FINANCIAL GROUP INCgroup of 2 filers holding71,719$5.3M-2,434Timeline
ALLIANCEBERNSTEIN L.P.68,448$5.06M<0.01%+1,68613F-HRTimeline
JPMORGAN CHASE & COin group JPMORGAN CHASE & CO67,320$4.98M<0.01%-90,47413F-HRTimelineGroup
BARCLAYS PLCin group BARCLAYS PLC66,613$4.93M<0.01%-35,04913F-HRTimelineGroup
PDT Partners, LLC64,977$4.8M0.31%+45,45713F-HRTimeline
Jain Global LLC62,043$4.59M0.04%+49,62613F-HRTimeline
Legal & General Group Plcin group Legal & General Group Plc57,251$4.23M<0.01%+20,61913F-HRTimelineGroup
HITE Hedge Asset Management LLC52,153$3.86M0.25%-47,84713F-HRTimeline
Corient Private Wealth LPin group Corient Private Wealth LP50,715$3.75M0.01%+17,68913F-HR/ATimelineGroup
AMERIPRISE FINANCIAL INCin group AMERIPRISE FINANCIAL INC49,117$3.63M<0.01%-35,32013F-HRTimelineGroup
Walleye Capital LLCgroup of 2 filers holding47,657$3.52M-104,333Timeline
California Public Employees Retirement …46,760$3.46M<0.01%-2413F-HRTimeline
WEDGE CAPITAL MANAGEMENT L L P/NC42,841$3.17M0.06%+3,46613F-HRTimeline
Retirement Systems of Alabama40,027$2.96M0.01%-28813F-HRTimeline
Quantbot Technologies LP39,607$2.93M0.1%-17,17813F-HRTimeline
SG Americas Securities, LLC37,011$2.74M<0.01%+30,07213F-HRTimeline
CALIFORNIA STATE TEACHERS RETIREMENT SY…36,098$2.67M<0.01%+34,00913F-HRTimeline
VARCOV Co.35,597$2.63M1.04%13F-HRTimeline
LUMINUS MANAGEMENT LLC35,189$2.6M2.4%new13F-HRTimeline
MANUFACTURERS LIFE INSURANCE COMPANY, T…in group MANUFACTURERS LIFE INSURANCE …33,451$2.47M<0.01%+5,37113F-HRTimelineGroup
Hudson Bay Capital Management LPin group Hudson Bay Capital Management…30,443$2.25M0.01%+26,94713F-HRTimelineGroup
COMERICA BANK28,483$2.11M0.01%+22113F-HRTimeline
SEI INVESTMENTS COin group SEI INVESTMENTS CO28,442$2.1M<0.01%+13,67513F-HRTimelineGroup
ENVESTNET ASSET MANAGEMENT INCin group ENVESTNET ASSET MANAGEMENT INC27,870$2.06M<0.01%+42413F-HRTimelineGroup
Aventail Capital Group, LP27,764$2.05M0.12%-50,57613F-HRTimeline
CITIGROUP INCin group CITIGROUP INC27,337$2.02M<0.01%-89,81413F-HRTimelineGroup
BANK OF MONTREAL /CAN/in group BANK OF MONTREAL /CAN/26,923$1.99M<0.01%-18,24213F-HRTimelineGroup
Verition Fund Management LLC26,078$1.93M0.01%-1,07713F-HRTimeline
STATE OF WISCONSIN INVESTMENT BOARD25,711$1.9M<0.01%new13F-HRTimeline
OCCUDO QUANTITATIVE STRATEGIES LP25,180$1.86M0.12%-2,23213F-HRTimeline
STATE BOARD OF ADMINISTRATION OF FLORID…24,115$1.78M<0.01%013F-HRTimeline
SUSQUEHANNA INTERNATIONAL GROUP, LLPin group SUSQUEHANNA INTERNATIONAL GRO…23,801$1.76M<0.01%+14,95713F-HRTimelineGroup
AMG National Trust Bank23,330$1.73M0.04%new13F-HRTimeline
KBC Group NVin group KBC Group NV22,222$1.64M<0.01%-5,33413F-HRTimelineGroup
AQR CAPITAL MANAGEMENT LLCin group AQR CAPITAL MANAGEMENT LLC20,535$1.52M<0.01%-31,98713F-HRTimelineGroup
South Dakota Investment Council20,235$1.5M0.03%-2,20013F-HRTimeline
Entropy Technologies, LP20,137$1.49M0.08%+14,32013F-HRTimeline
Ameritas Investment Partners, Inc.group of 2 filers holding20,082$1.48M+1,364Timeline
MACKENZIE FINANCIAL CORP19,833$1.48M<0.01%-5,48713F-HRTimeline
Alberta Investment Management Corp19,700$1.46M0.01%new13F-HR/ATimeline
CANADA LIFE ASSURANCE Coin group CANADA LIFE ASSURANCE Co19,331$1.43M<0.01%+4,12413F-HRTimelineGroup
Dana Investment Advisors, Inc.19,164$1.42M0.04%-3313F-HRTimeline
STIFEL FINANCIAL CORPin group STIFEL FINANCIAL CORP18,921$1.4M<0.01%+2,15813F-HRTimelineGroup
AMERICAN CENTURY COMPANIES INCin group AMERICAN CENTURY COMPANIES INC18,301$1.35M<0.01%+19013F-HRTimelineGroup
Jump Financial, LLCin group Jump Financial, LLC17,600$1.3M0.02%-60,29413F-HRTimelineGroup
MetLife Investment Management, LLCin group MetLife Investment Management…16,295$1.2M0.01%-84313F-HRTimelineGroup
Sciencast Management LP15,619$1.15M0.16%new13F-HRTimeline
Summit Trail Advisors, LLC15,561$1.15M0.02%+2,39113F-HRTimeline
STOREBRAND ASSET MANAGEMENT AS15,405$1.14M<0.01%-40,72413F-HRTimeline
AMALGAMATED BANK15,045$1.11M0.01%-25713F-HRTimeline
Treasurer of the State of North Carolina13,998$1.03M<0.01%-1,02413F-HRTimeline
State of Tennessee, Department of Treas…12,946$1.03M<0.01%+7,93313F-HRTimeline
MUTUAL OF AMERICA CAPITAL MANAGEMENT LLCin group MUTUAL OF AMERICA CAPITAL MAN…13,880$1.03M0.01%-1,52013F-HRTimelineGroup
Zurcher Kantonalbank (Zurich Cantonalba…13,367$988K<0.01%new13F-HRTimeline
LPL Financial LLC12,648$935K<0.01%+27913F-HRTimeline
YOUSIF CAPITAL MANAGEMENT, LLC11,055$928K0.01%-16213F-HRTimeline
Marnell Management LLC11,700$865K0.66%13F-HRTimeline
Walnut Level Capital LLC11,404$843K0.67%-46,27513F-HRTimeline
ARIZONA STATE RETIREMENT SYSTEM10,794$798K<0.01%new13F-HRTimeline
PUBLIC EMPLOYEES RETIREMENT SYSTEM OF O…10,056$744K<0.01%-38213F-HRTimeline
Mitsubishi UFJ Asset Management Co., Lt…in group Mitsubishi UFJ Trust & Bankin…9,980$740K<0.01%+3,62813F-HRTimelineGroup
Weiss Asset Management LPin group Weiss Asset Management LP9,928$734K0.01%new13F-HRTimelineGroupThe filing omitted confidential holdings, a later amendment may add them.
Brevan Howard Capital Management LPin group Brevan Howard Capital Managem…9,468$700K0.01%+2,06213F-HRTimelineGroup
Louisiana State Employees Retirement Sy…9,200$680K0.01%-10013F-HRTimeline
Gotham Asset Management, LLC9,199$680K<0.01%-12,86613F-HRTimeline
Universal- Beteiligungs- und Serviceges…in group Universal- Beteiligungs- und …9,182$679K<0.01%-29113F-HRTimelineGroup
ALPINE WOODS CAPITAL INVESTORS, LLCin group ALPINE WOODS CAPITAL INVESTOR…8,989$665K0.16%new13F-HRTimelineGroup
Handelsbanken Fonder AB8,900$658K<0.01%+40013F-HRTimeline
COMMONWEALTH OF PENNSYLVANIA PUBLIC SCH…8,346$617K<0.01%-21213F-HRTimeline
KLP KAPITALFORVALTNING AS8,200$606K<0.01%new13F-HRTimeline
CANADA PENSION PLAN INVESTMENT BOARD7,931$586K<0.01%+2,72113F-HRTimeline
STATE OF MICHIGAN RETIREMENT SYSTEM7,900$584K<0.01%013F-HRTimeline
DekaBank Deutsche Girozentrale3,540$583K<0.01%013F-HRTimeline
State of Wyoming7,824$579K0.06%new13F-HRTimeline
Creative Planningin group Creative Planning7,685$568K<0.01%-5,64413F-HRTimelineGroup
Thrivent Financial for Lutheransin group Thrivent Financial for Luther…7,510$555K<0.01%-15113F-HRTimelineGroup
NORTHWESTERN MUTUAL INVESTMENT MANAGEME…in group NORTHWESTERN MUTUAL INVESTMEN…7,462$552K0.01%+3013F-HRTimelineGroup
Oak Thistle LLC7,170$530K0.07%new13F-HRTimeline
Edgestream Partners, L.P.7,095$525K0.01%new13F-HRTimeline
BI Asset Management Fondsmaeglerselskab…in group BI Asset Management Fondsmaeg…7,037$520K<0.01%+3,33813F-HRTimelineGroup
NEW MEXICO EDUCATIONAL RETIREMENT BOARD7,000$518K0.02%013F-HRTimeline
Pettee Investors, Inc.6,711$496K0.28%013F-HRTimeline
OREGON PUBLIC EMPLOYEES RETIREMENT FUND6,668$493K0.01%013F-HRTimeline
Polymer Capital Management (US) LLC6,500$481K0.06%-9,70013F-HRTimeline
RiverFront Investment Group, LLC6,497$480K0.01%-47513F-HRTimeline
Advisors Asset Management, Inc.6,047$447K0.01%-1,57413F-HR/ATimeline
Pictet Asset Management Holding SAin group Pictet Asset Management Holdi…6,025$445K<0.01%new13F-HRTimelineGroup
Schonfeld Strategic Advisors LLC6,012$445K<0.01%-39,97813F-HRTimeline
Numerai GP LLC5,792$428K0.05%new13F-HRTimeline
Police & Firemen's Retirement System of…5,684$420K<0.01%013F-HRTimeline
Storgate, LLC5,380$398K0.33%13F-HRTimeline
NEW YORK STATE TEACHERS RETIREMENT SYST…5,225$386K<0.01%013F-HRTimeline
Unison Advisors LLC5,215$386K0.03%+3513F-HRTimeline
AlphaQuest LLC5,192$384K0.02%+4,54813F-HRTimeline
Pathstone Holdings, LLCin group Pathstone Holdings, LLC4,649$344K<0.01%-4,35513F-HRTimelineGroup
CAXTON ASSOCIATES LLP4,615$341K0.01%new13F-HRTimeline
Inspire Investing, LLCin group Inspire Investing, LLC4,404$326K0.03%+41213F-HRTimelineGroup
GUGGENHEIM CAPITAL LLCin group GUGGENHEIM CAPITAL LLC4,174$309K<0.01%new13F-HRTimelineGroup
CI INVESTMENTS INC.in group CI INVESTMENTS INC.4,128$305K<0.01%-5613F-HRTimelineGroup
Daiwa Securities Group Inc.in group Daiwa Securities Group Inc.4,108$304K<0.01%+11713F-HRTimelineGroup
Atria Investments, Inc4,072$301K<0.01%+23913F-HRTimeline
Pacer Advisors, Inc.3,988$295K<0.01%-2,02213F-HR/ATimeline
CIBC Asset Management Inc3,977$294K<0.01%-40213F-HRTimeline
GAMCO INVESTORS, INC. ET ALin group GAMCO Investors (Gabelli)3,941$291K<0.01%-20013F-HRTimelineGroup
MERCER GLOBAL ADVISORS INC /ADV3,923$290K<0.01%-31813F-HRTimeline
Assenagon Asset Management S.A.3,790$280K<0.01%new13F-HRTimeline
DARK FOREST CAPITAL MANAGEMENT LP3,750$277K0.01%-53,74213F-HRTimeline
AlphaGrep UK Ltd3,471$257K0.09%13F-HRTimeline
Sanctuary Advisors, LLC3,441$254K<0.01%-10813F-HRTimeline
State of Alaska, Department of Revenue3,309$244K<0.01%-34013F-HRTimeline
Cetera Investment Advisers3,154$233K<0.01%-1,52713F-HRTimeline
RAYMOND JAMES FINANCIAL INCin group RAYMOND JAMES FINANCIAL INC3,121$231K<0.01%-1,63513F-HRTimelineGroup
CAPSTONE INVESTMENT ADVISORS, LLCin group CAPSTONE INVESTMENT ADVISORS,…3,119$231K<0.01%new13F-HRTimelineGroup
XPONANCE LLC3,101$229K<0.01%-63813F-HRTimeline
Claret Asset Management Corp3,007$222K0.03%-713F-HRTimeline
Total Wealth Planning & Management, Inc.2,955$218K0.17%13F-HRTimeline
Odyssean, LLC2,903$215K0.15%13F-HRTimeline
iSAM Funds (UK) Ltdin group iSAM Funds (UK) Ltd2,828$209K0.08%new13F-HRTimelineGroup
Federation des caisses Desjardins du Qu…2,559$189K<0.01%+37213F-HRTimeline
Lloyd Advisory Services, LLC.2,445$181K0.07%new13F-HRTimeline
SECURIAN ASSET MANAGEMENT, INC2,403$178K0.01%013F-HRTimeline
CoreFirst Bank & Trust2,220$164K0.09%-3013F-HRTimeline
Virtus Investment Advisers, LLCin group Virtus Investment Advisers, L…2,186$162K0.04%new13F-HRTimelineGroup
US BANCORP \DE\in group US BANCORP \DE\2,010$149K<0.01%-42313F-HRTimelineGroup
SIMPLEX TRADING, LLC1,981$146K<0.01%new13F-HRTimeline
Sterling Capital Management LLC1,977$146K<0.01%-8913F-HRTimeline
MANNING & NAPIER ADVISORS LLC1,745$131K<0.01%-2,44313F-HRTimeline
PUBLIC EMPLOYEES RETIREMENT ASSOCIATION…1,704$126K<0.01%013F-HRTimeline
Covestor Ltd1,662$123K0.06%-11713F-HRTimeline
HANTZ FINANCIAL SERVICES, INC.1,553$115K<0.01%+81313F-HRTimelineThe filing omitted confidential holdings, a later amendment may add them.
Kimelman & Baird, LLC1,500$111K0.01%013F-HRTimeline
Allworth Financial LP1,438$106K<0.01%-413F-HRTimeline
WEXFORD CAPITAL LP1,344$99.4K0.03%new13F-HRTimeline
PNC Financial Services Group, Inc.in group PNC Financial Services Group,…1,335$98.7K<0.01%-20913F-HRTimelineGroup
MAI Capital Management1,316$97.3K<0.01%+613F-HRTimeline