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Disclosery

WLK WESTLAKE CORPORATION

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COM (common), issuer CIK 1262823

298 managers (305 13F filers) reported a position in WLK shares at 2025-09-30, 41,559,849 shares in all. 57 filers opened a position and 55 filers sold out during the quarter.

Managers
298
13F filers
305
New
57
Added
102
Reduced
106
Sold out
55
Shares held by filers
41,559,849

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, Q3 2025

Filers in the available 13F reports with a share position at 2025-09-30, 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 Ltd3,914,411$302M1.29%new13F-HRTimelineGroup
VANGUARD GROUP INCgroup of 2 filers holding3,448,975$266M-83,880Timeline
BlackRock, Inc.in group BlackRock, Inc.3,185,736$245M<0.01%-142,96013F-HRTimelineGroup
VICTORY CAPITAL MANAGEMENT INC2,866,360$221M0.13%-855,38213F-HRTimeline
PRICE T ROWE ASSOCIATES INC /MD/2,208,143$170M0.02%+149,55513F-HRTimeline
BRANDES INVESTMENT PARTNERS, LPin group BRANDES INVESTMENT PARTNERS, …1,548,694$119M0.96%+91,82313F-HRTimelineGroup
UBS Group AGgroup of 2 filers holding1,477,753$114M+382,460Timeline
DIMENSIONAL FUND ADVISORS LPin group DIMENSIONAL FUND ADVISORS LP1,300,240$100M0.02%+25,07113F-HRTimelineGroup
STATE STREET CORPin group STATE STREET CORP1,295,242$99.8M<0.01%-96,98513F-HRTimelineGroup
CITADEL ADVISORS LLCin group CITADEL ADVISORS LLC1,200,851$92.5M0.07%+1,188,54513F-HRTimelineGroup
GOLDMAN SACHS GROUP INCin group GOLDMAN SACHS GROUP INC1,051,397$81M0.01%-7,54613F-HRTimelineGroup
JACOBS LEVY EQUITY MANAGEMENT, INC860,723$66.3M0.26%-124,53513F-HRTimeline
MIRAE ASSET GLOBAL ETFS HOLDINGS Ltd.in group Mirae Asset Global Investment…855,976$66M0.11%+11,84613F-HRTimelineGroup
Holocene Advisors, LP854,184$65.8M0.15%+696,02913F-HRTimeline
MORGAN STANLEYin group MORGAN STANLEY815,629$62.9M<0.01%+353,14113F-HR/ATimelineGroup
Nuveen, LLCin group TIAA686,539$52.9M0.01%-199,58913F-HRTimelineGroup
GEODE CAPITAL MANAGEMENT, LLCin group GEODE CAPITAL MANAGEMENT, LLC653,086$50.3M<0.01%+78,85513F-HRTimelineGroup
ANTIPODES PARTNERS Ltd555,904$42.8M0.96%-267,26513F-HRTimeline
Allspring Global Investments Holdings, …in group Allspring Global Investments …546,151$41.9M0.07%+25,41413F-HRTimelineGroup
Balyasny Asset Management L.P.in group Balyasny Asset Management475,743$36.7M0.07%+395,89613F-HRTimelineGroup
THOMPSON SIEGEL & WALMSLEY LLC441,340$34M0.55%new13F-HRTimeline
ProShare Advisors LLC422,640$32.6M0.07%+67,48613F-HRTimeline
VOLORIDGE INVESTMENT MANAGEMENT, LLC394,307$30.4M0.1%-125,94913F-HRTimeline
ROYAL BANK OF CANADAin group ROYAL BANK OF CANADA381,586$29.4M0.01%+163,09413F-HRTimelineGroup
Caisse de depot et placement du Quebec368,318$28.4M0.05%new13F-HRTimeline
JANUS HENDERSON GROUP PLCin group Janus Henderson365,984$28.2M0.01%+151,70313F-HRTimelineGroup
FMR LLCin group FMR LLC314,350$24.2M<0.01%-1,300,88813F-HRTimelineGroup
NEW YORK STATE COMMON RETIREMENT FUND309,626$23.9M0.03%+3,20013F-HRTimeline
ARROWSTREET CAPITAL, LIMITED PARTNERSHIPin group ARROWSTREET CAPITAL, LIMITED …299,728$23.1M0.01%+9,69013F-HRTimelineGroup
CHARLES SCHWAB INVESTMENT MANAGEMENT INCin group Charles Schwab Trust Co272,962$21M<0.01%+16,11713F-HRTimelineGroup
Merewether Investment Management, LP268,400$20.7M0.49%new13F-HRTimeline
SCHRODER INVESTMENT MANAGEMENT GROUP261,562$20.1M0.02%+12,58113F-HRTimeline
Erste Asset Management GmbHin group Erste Asset Management GmbH260,000$20M0.19%+88,49913F-HRTimelineGroup
NORTHERN TRUST CORPin group NORTHERN TRUST CORP238,139$18.4M<0.01%+5,17713F-HRTimelineGroup
BANK OF AMERICA CORP /DE/in group BANK OF AMERICA CORP /DE/208,897$16.1M<0.01%+70,24313F-HR/ATimelineGroup
VAN LANSCHOT KEMPEN INVESTMENT MANAGEME…196,043$15.1M0.13%+13,14413F-HRTimeline
Woodline Partners LP193,786$14.9M0.07%-133,50413F-HRTimeline
BNP PARIBAS FINANCIAL MARKETSin group BNP PARIBAS FINANCIAL MARKETS190,966$14.7M0.01%+5,56913F-HRTimelineGroup
DEPRINCE RACE & ZOLLO INC189,009$14.6M0.29%-64,36113F-HRTimeline
Russell Investments Group, Ltd.in group Russell Investments Group, Lt…184,631$14.2M0.02%+55,46513F-HRTimelineGroup
ROBOTTI ROBERTin group ROBOTTI ROBERT181,851$14M2.43%-98913F-HRTimelineGroup
Bank of New York Mellon Corpin group Bank of New York Mellon Corp177,982$13.7M<0.01%-6,33013F-HRTimelineGroup
TWO SIGMA INVESTMENTS, LPgroup of 2 filers holding176,665$13.6M-103,950Timeline
TEACHERS RETIREMENT SYSTEM OF THE STATE…165,315$12.7M0.1%+60,30013F-HRTimeline
FIRST TRUST ADVISORS LPin group FIRST TRUST ADVISORS LP164,936$12.7M0.01%+37,00713F-HRTimelineGroup
D. E. Shaw & Co., Inc.in group D. E. Shaw & Co., Inc.160,009$12.3M0.01%-182,95113F-HRTimelineGroup
JPMORGAN CHASE & COin group JPMORGAN CHASE & CO157,794$12.2M<0.01%-9,80113F-HR/ATimelineGroup
Walleye Capital LLCgroup of 2 filers holding151,990$11.7M+39,792Timeline
1832 Asset Management L.P.138,920$10.7M0.02%013F-HRTimeline
Invesco Ltd.in group Invesco Ltd.134,699$10.4M<0.01%+10,13513F-HRTimelineGroup
SPROTT INC.130,000$10M0.38%+5,00013F-HRTimeline
Alyeska Investment Group, L.P.in group Alyeska Investment Group, L.P.119,986$9.25M0.03%-118,14213F-HRTimelineGroup
CITIGROUP INCin group CITIGROUP INC117,151$9.03M0.01%+44,52513F-HRTimelineGroup
Impala Asset Management LLC115,000$8.86M5.5%new13F-HRTimeline
Ilex Capital Partners (UK) LLP110,691$8.53M0.27%-162,87313F-HRTimeline
Lloyd Harbor Capital Management, LLC110,000$8.48M4.07%new13F-HRTimeline
MILLENNIUM MANAGEMENT LLCin group MILLENNIUM MANAGEMENT LLC106,320$8.19M0.01%-683,52613F-HRTimelineGroup
BARCLAYS PLCin group BARCLAYS PLC101,662$7.83M<0.01%+30,62313F-HR/ATimelineGroup
Janney Montgomery Scott LLC100,998$7.78M0.02%+3013F-HRTimeline
Squarepoint Ops LLCin group Squarepoint Ops LLC100,391$7.74M0.02%+5,90813F-HRTimelineGroup
HITE Hedge Asset Management LLC100,000$7.71M0.42%-14,48713F-HRTimeline
WELLS FARGO & COMPANY/MNin group WELLS FARGO & COMPANY/MN97,129$7.48M<0.01%+11,69513F-HRTimelineGroup
Zimmer Partners, LP90,000$6.94M0.17%new13F-HRTimeline
RHUMBLINE ADVISERS88,859$6.85M0.01%-1,76913F-HRTimeline
Point72 Asset Management, L.P.in group Point72 Asset Management, L.P.84,884$6.54M0.01%new13F-HRTimelineGroup
AMERIPRISE FINANCIAL INCin group AMERIPRISE FINANCIAL INC84,437$6.51M<0.01%-15,09713F-HRTimelineGroup
Cerity Partners LLCin group Cerity Partners LLC83,079$6.4M0.01%-3,71413F-HRTimelineGroup
Aventail Capital Group, LP78,340$6.04M0.29%new13F-HRTimeline
Jump Financial, LLCin group Jump Financial, LLC77,894$6M0.08%new13F-HR/ATimelineGroup
PRINCIPAL FINANCIAL GROUP INCgroup of 2 filers holding74,153$5.71M-1,476Timeline
LAZARD ASSET MANAGEMENT LLCin group LAZARD ASSET MANAGEMENT LLC72,622$5.6M0.01%-1,45013F-HRTimelineGroup
NOMURA ASSET MANAGEMENT CO LTDgroup of 2 filers holding70,116$5.4M+69,220Timeline
ALLIANCEBERNSTEIN L.P.66,762$5.14M<0.01%-1,85113F-HRTimeline
Quantinno Capital Management LP65,235$5.03M0.01%+35,00413F-HRTimeline
Concentric Capital Strategies, LP64,158$4.94M0.24%+11,27113F-HRTimeline
TUDOR INVESTMENT CORP ET AL62,600$4.82M0.03%new13F-HR/ATimeline
Walnut Level Capital LLC57,679$4.44M3.15%new13F-HRTimeline
WELLINGTON MANAGEMENT GROUP LLPin group WELLINGTON MANAGEMENT GROUP L…57,510$4.43M<0.01%new13F-HRTimelineGroup
DARK FOREST CAPITAL MANAGEMENT LP57,492$4.43M0.17%-34,99913F-HR/ATimeline
Quantbot Technologies LP56,785$4.38M0.12%new13F-HRTimeline
MARSHALL WACE, LLPin group MARSHALL WACE, LLP56,461$4.35M<0.01%+48,35013F-HRTimelineGroup
STOREBRAND ASSET MANAGEMENT AS56,129$4.33M0.01%-30,02313F-HRTimeline
AQR CAPITAL MANAGEMENT LLCin group AQR CAPITAL MANAGEMENT LLC52,522$4.01M<0.01%-80,83313F-HRTimelineGroup
HRT FINANCIAL LP47,624$3.67M0.01%new13F-HRTimeline
California Public Employees Retirement …46,784$3.61M<0.01%-13,08813F-HRTimeline
Thomist Capital Management, LP46,200$3.56M1.11%-25,40013F-HRTimeline
Schonfeld Strategic Advisors LLC45,990$3.54M0.02%+35,10113F-HRTimeline
BANK OF MONTREAL /CAN/in group BANK OF MONTREAL /CAN/45,165$3.48M<0.01%-185,85713F-HRTimelineGroup
Journey Advisory Group, LLC45,072$3.47M0.26%+23013F-HRTimeline
Retirement Systems of Alabama40,315$3.11M0.01%-43613F-HRTimeline
WEDGE CAPITAL MANAGEMENT L L P/NC39,375$3.03M0.05%-93,02613F-HRTimeline
Legal & General Group Plcin group Legal & General Group Plc36,632$2.82M<0.01%-38,44713F-HRTimelineGroup
Corient Private Wealth LPin group Corient Private Wealth LP33,026$2.54M<0.01%+24,06113F-HRTimelineGroup
Cubist Systematic Strategies, LLC31,396$2.42M0.03%new13F-HRTimeline
Aquatic Capital Management LLC29,130$2.24M0.04%new13F-HRTimeline
Amundiin group Amundi26,773$2.19M<0.01%-42,89813F-HRTimelineGroup
COMERICA BANK28,262$2.18M0.01%-6,07113F-HRTimeline
MANUFACTURERS LIFE INSURANCE COMPANY, T…in group MANUFACTURERS LIFE INSURANCE …28,080$2.16M<0.01%-5413F-HRTimelineGroup
KBC Group NVin group KBC Group NV27,556$2.12M0.01%-20,45813F-HRTimelineGroup
ENVESTNET ASSET MANAGEMENT INCin group ENVESTNET ASSET MANAGEMENT INC27,446$2.12M<0.01%+7,05013F-HRTimelineGroup
OCCUDO QUANTITATIVE STRATEGIES LP27,412$2.11M0.26%+12,28713F-HRTimeline
Verition Fund Management LLC27,155$2.09M0.01%-14,76813F-HRTimeline
RENAISSANCE TECHNOLOGIES LLC25,900$2M<0.01%-118,30013F-HRTimeline
MACKENZIE FINANCIAL CORP25,320$1.95M<0.01%new13F-HRTimeline
Point72 Hong Kong Ltd24,871$1.92M0.09%new13F-HRTimeline
STATE BOARD OF ADMINISTRATION OF FLORID…24,115$1.86M<0.01%-53513F-HRTimeline
South Dakota Investment Council22,435$1.73M0.03%+30013F-HRTimeline
Knights of Columbus Asset Advisors LLC22,364$1.72M0.1%013F-HRTimeline
Gotham Asset Management, LLC22,065$1.7M0.01%+9,98913F-HRTimeline
PDT Partners, LLC19,520$1.5M0.09%new13F-HRTimeline
Dana Investment Advisors, Inc.19,197$1.48M0.04%-58613F-HRTimeline
Ameritas Investment Partners, Inc.group of 2 filers holding18,718$1.44M+7,066Timeline
AMERICAN CENTURY COMPANIES INCin group AMERICAN CENTURY COMPANIES INC18,111$1.4M<0.01%+5513F-HRTimelineGroup
Recurrent Investment Advisors LLC18,106$1.4M0.11%+213F-HRTimeline
APG Asset Management N.V.in group APG Asset Management N.V.21,100$1.38M<0.01%013F-HRTimelineGroup
MetLife Investment Management, LLCin group MetLife Investment Management…17,138$1.32M0.01%-81613F-HRTimelineGroup
STIFEL FINANCIAL CORPin group STIFEL FINANCIAL CORP16,763$1.29M<0.01%+4,40613F-HRTimelineGroup
Polymer Capital Management (US) LLC16,200$1.25M0.17%+2,14013F-HRTimeline
Twin Tree Management, LP16,037$1.24M0.06%-13,32313F-HRTimeline
MUTUAL OF AMERICA CAPITAL MANAGEMENT LLCin group MUTUAL OF AMERICA CAPITAL MAN…15,400$1.19M0.01%-1,18113F-HRTimelineGroup
AMALGAMATED BANK15,302$1.18M0.01%+6413F-HRTimeline
CANADA LIFE ASSURANCE Coin group CANADA LIFE ASSURANCE Co15,207$1.17M<0.01%013F-HRTimelineGroup
Treasurer of the State of North Carolina15,022$1.16M<0.01%-58613F-HRTimeline
SEI INVESTMENTS COin group SEI INVESTMENTS CO14,767$1.14M<0.01%-7,97913F-HRTimelineGroup
Creative Planningin group Creative Planning13,329$1.03M<0.01%+2,16413F-HRTimelineGroup
Summit Trail Advisors, LLC13,170$1.01M0.01%+8,66213F-HRTimeline
JANE STREET GROUP, LLCin group JANE STREET GROUP, LLC12,982$1M<0.01%-21,37513F-HRTimelineGroup
Farringdon Capital, Ltd.12,529$965K0.25%new13F-HRTimeline
Jain Global LLC12,417$957K0.01%new13F-HRTimeline
LPL Financial LLC12,369$953K<0.01%-8,90413F-HRTimeline
EXCHANGE TRADED CONCEPTS, LLC12,241$943K0.01%new13F-HRTimeline
Lighthouse Investment Partners, LLCin group Lighthouse Investment Partner…11,661$899K0.03%new13F-HRTimelineGroup
YOUSIF CAPITAL MANAGEMENT, LLC11,217$864K0.01%-65113F-HRTimeline
PUBLIC EMPLOYEES RETIREMENT SYSTEM OF O…10,438$804K<0.01%+6513F-HRTimeline
Scientech Research LLC9,742$751K0.26%new13F-HRTimeline
Board of the Pension Protection Fund9,500$732K0.72%new13F-HRTimeline
Universal- Beteiligungs- und Serviceges…in group Universal- Beteiligungs- und …9,473$730K<0.01%+57713F-HRTimelineGroup
Louisiana State Employees Retirement Sy…9,300$717K0.01%-10013F-HRTimeline
SUMMIT WEALTH GROUP LLC / CO9,993$713K0.08%new13F-HRTimeline
Bayesian Capital Management, LP9,241$712K0.15%new13F-HRTimeline
Pathstone Holdings, LLCin group Pathstone Holdings, LLC9,004$694K<0.01%+213F-HRTimelineGroup
SUSQUEHANNA INTERNATIONAL GROUP, LLPin group SUSQUEHANNA INTERNATIONAL GRO…8,844$682K<0.01%-321,97013F-HRTimelineGroup
COMMONWEALTH OF PENNSYLVANIA PUBLIC SCH…8,558$659K<0.01%-913F-HRTimeline
Handelsbanken Fonder AB8,500$655K<0.01%013F-HRTimeline
STATE OF MICHIGAN RETIREMENT SYSTEM7,900$609K<0.01%-10013F-HRTimeline
QUADRANT CAPITAL GROUP LLC7,891$608K0.02%-5213F-HRTimeline
Thrivent Financial for Lutheransin group Thrivent Financial for Luther…7,661$590K<0.01%-18913F-HRTimelineGroup
Advisors Asset Management, Inc.7,621$587K0.01%-2613F-HR/ATimeline
NORTHWESTERN MUTUAL INVESTMENT MANAGEME…group of 2 filers holding7,432$573K-152Timeline
Brevan Howard Capital Management LPin group Brevan Howard Capital Managem…7,406$571K0.01%-19,40613F-HRTimelineGroup
NEW MEXICO EDUCATIONAL RETIREMENT BOARD7,000$539K0.02%013F-HRTimeline
Arax Advisory Partners6,983$538K0.01%+6,87013F-HRTimeline
RiverFront Investment Group, LLC6,972$537K0.01%013F-HRTimeline
SG Americas Securities, LLC6,939$535K<0.01%-47,56613F-HRTimeline
Pettee Investors, Inc.6,711$517K0.28%013F-HRTimeline
OREGON PUBLIC EMPLOYEES RETIREMENT FUND6,668$514K0.01%-20013F-HRTimeline
Diametric Capital, LP6,415$494K0.18%new13F-HRTimeline
Mitsubishi UFJ Asset Management Co., Lt…in group Mitsubishi UFJ Trust & Bankin…6,352$489K<0.01%-38613F-HRTimelineGroup
Pacer Advisors, Inc.6,010$463K<0.01%new13F-HRTimeline
Entropy Technologies, LP5,817$448K0.03%-1,83813F-HRTimeline
Police & Firemen's Retirement System of…5,684$438K<0.01%+66413F-HRTimeline
Point72 Asia (Singapore) Pte. Ltd.5,474$422K0.07%new13F-HRTimeline
NEW YORK STATE TEACHERS RETIREMENT SYST…5,225$403K<0.01%013F-HRTimeline
CANADA PENSION PLAN INVESTMENT BOARD5,210$401K<0.01%-44,13413F-HRTimeline
Unison Advisors LLC5,180$399K0.04%+3413F-HRTimeline
State of Tennessee, Department of Treas…5,013$386K<0.01%013F-HRTimeline
Sequent Planning LLC4,845$373K0.11%-6713F-HRTimeline
RAYMOND JAMES FINANCIAL INCin group RAYMOND JAMES FINANCIAL INC4,756$366K<0.01%-54213F-HRTimelineGroup
Cetera Investment Advisers4,681$361K<0.01%+33113F-HRTimeline
CIBC Asset Management Inc4,379$337K<0.01%+913F-HRTimeline
MERCER GLOBAL ADVISORS INC /ADV4,241$327K<0.01%-1,02913F-HRTimeline
MANNING & NAPIER ADVISORS LLC4,188$323K<0.01%-16,49613F-HRTimeline
CI INVESTMENTS INC.in group CI INVESTMENTS INC.4,184$322K<0.01%-3,51113F-HRTimelineGroup
GAMCO INVESTORS, INC. ET ALin group GAMCO Investors (Gabelli)4,141$319K<0.01%-7,42513F-HRTimelineGroup
NorthCoast Asset Management LLC4,105$316K<0.01%-1,67113F-HRTimeline
Daiwa Securities Group Inc.in group Daiwa Securities Group Inc.3,991$308K<0.01%new13F-HRTimelineGroup
Inspire Investing, LLCin group Inspire Investing, LLC3,992$308K0.03%+29513F-HRTimelineGroup
Greenland Capital Management LP4,008$304K0.04%013F-HRTimeline
Point72 (DIFC) Ltd3,935$303K0.02%new13F-HRTimeline
LMR Partners LLPin group LMR Partners LLP3,861$298K<0.01%013F-HRTimelineGroup
Atria Investments, Inc3,833$295K<0.01%+83413F-HRTimeline
XPONANCE LLC3,739$288K<0.01%-1,05613F-HRTimeline
BI Asset Management Fondsmaeglerselskab…in group BI Asset Management Fondsmaeg…3,699$285K<0.01%new13F-HRTimelineGroup
PRUDENTIAL FINANCIAL INCin group PRUDENTIAL FINANCIAL INC3,678$283K<0.01%-11013F-HRTimelineGroup
State of Alaska, Department of Revenue3,649$281K<0.01%-24,02913F-HRTimeline
OSAIC HOLDINGS, INC.in group OSAIC HOLDINGS, INC.3,258$274K<0.01%-15913F-HRTimelineGroup
Sanctuary Advisors, LLC3,549$273K<0.01%new13F-HR/ATimeline
DekaBank Deutsche Girozentrale3,540$270K<0.01%013F-HRTimeline
Hudson Bay Capital Management LPin group Hudson Bay Capital Management…3,496$269K<0.01%new13F-HR/ATimelineGroup
Magnetar Financial LLCin group Magnetar Financial LLC3,329$257K<0.01%-3,85813F-HRTimelineGroup
FEDERATED HERMES, INC.in group FEDERATED HERMES, INC.3,029$233K<0.01%+1,72213F-HRTimelineGroup
&PARTNERS3,028$233K<0.01%new13F-HRTimeline
Claret Asset Management Corp3,014$232K0.03%-4313F-HRTimeline
MFA WEALTH ADVISORS, LLC2,916$225K0.05%+3013F-HRTimeline
VOYA INVESTMENT MANAGEMENT LLCin group VOYA INVESTMENT MANAGEMENT LLC2,772$214K<0.01%-94313F-HRTimelineGroup
Avanza Fonder AB2,680$207K0.01%013F-HRTimeline
ASR Vermogensbeheer N.V.2,449$189K<0.01%-2813F-HRTimeline
US BANCORP \DE\in group US BANCORP \DE\2,433$187K<0.01%-19213F-HRTimelineGroup
SECURIAN ASSET MANAGEMENT, INC2,403$185K<0.01%-10013F-HRTimeline
CoreFirst Bank & Trust2,250$173K0.09%+83013F-HRTimeline