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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
Federation des caisses Desjardins du Qu…2,187$169K<0.01%+1,99713F-HRTimeline
CALIFORNIA STATE TEACHERS RETIREMENT SY…2,089$161K<0.01%+213F-HRTimeline
Sterling Capital Management LLC2,066$159K<0.01%-21013F-HRTimeline
Covestor Ltd1,779$137K0.08%+1,02013F-HRTimeline
PUBLIC EMPLOYEES RETIREMENT ASSOCIATION…1,704$131K<0.01%013F-HRTimeline
PNC Financial Services Group, Inc.in group PNC Financial Services Group,…1,544$119K<0.01%+11113F-HRTimelineGroup
Tower Research Capital LLC (TRC)in group Tower Research Capital LLC (T…1,532$118K<0.01%-96013F-HRTimelineGroup
Kimelman & Baird, LLC1,500$116K0.01%013F-HRTimeline
Allworth Financial LP1,442$111K<0.01%+3313F-HRTimeline
MAI Capital Management1,310$101K<0.01%-3813F-HRTimeline
Grey Fox Wealth Advisors, LLC1,154$88.9K0.02%new13F-HRTimeline
STRS OHIO799$61.6K<0.01%013F-HRTimeline
Parallel Advisors, LLC778$60K<0.01%+28613F-HRTimeline
NewEdge Advisors, LLC745$57.4K<0.01%013F-HRTimeline
HANTZ FINANCIAL SERVICES, INC.740$57K<0.01%+47613F-HRTimelineThe filing omitted confidential holdings, a later amendment may add them.
CWM, LLCin group CWM, LLC683$53K<0.01%+11613F-HRTimelineGroup
CIBC Private Wealth Group LLCin group CIBC Bancorp USA Inc.686$52.9K<0.01%new13F-HRTimelineGroup
AlphaQuest LLC644$49.6K<0.01%-8613F-HRTimeline
Transamerica Financial Advisors, LLCin group Transamerica Financial Adviso…586$45.1K<0.01%+14813F-HRTimelineGroup
UMB Bank, n.a.578$44.5K<0.01%+1313F-HRTimelineThe filing omitted confidential holdings, a later amendment may add them.
Farther Finance Advisors, LLC503$38.8K<0.01%-1,41813F-HRTimeline
Itau Unibanco Holding S.A.in group Itau Unibanco Holding S.A.497$38.3K<0.01%-50313F-HRTimelineGroup
SIGNATUREFD, LLC454$35K<0.01%-18613F-HRTimeline
GAMMA Investing LLC441$34K<0.01%-413F-HRTimeline
JONES FINANCIAL COMPANIES LLLPin group JONES FINANCIAL COMPANIES LLLP406$31.5K<0.01%+10613F-HRTimelineGroup
Point72 Europe (London) LLP373$28.7K<0.01%new13F-HRTimeline
Caitong International Asset Management …366$28.2K0.02%new13F-HRTimeline
ARCADIA INVESTMENT MANAGEMENT CORP/MI350$27K<0.01%013F-HRTimeline
HUNTINGTON NATIONAL BANKin group HUNTINGTON NATIONAL BANK350$27K<0.01%+313F-HRTimelineGroup
NISA INVESTMENT ADVISORS, LLC332$25.6K<0.01%+3413F-HRTimeline
FIFTH THIRD BANCORPin group FIFTH THIRD BANK, NATIONAL AS…328$25.3K<0.01%+3913F-HRTimelineGroup
Rockefeller Capital Management L.P.in group Rockefeller Capital Managemen…299$23.1K<0.01%new13F-HRTimelineGroup
Pathway Financial Advisers, LLC289$22.3K0.01%new13F-HRTimeline
IFP Advisors, Inc287$22.1K<0.01%+2813F-HR/ATimeline
NATIONAL BANK OF CANADA /FI/in group NATIONAL BANK OF CANADA /FI/287$22.1K<0.01%+5013F-HRTimelineGroup
FNY Investment Advisers, LLC273$21K0.01%new13F-HRTimeline
Spire Wealth Managementin group Spire Wealth Management272$21K<0.01%+12713F-HRTimelineGroup
MassMutual Private Wealth & Trust, FSB231$17.8K<0.01%+10113F-HRTimeline
LANARK FINANCIAL, INC.204$15.7K<0.01%+913F-HRTimeline
Quent Capital, LLC203$15.7K<0.01%new13F-HRTimeline
EverSource Wealth Advisors, LLCin group EverSource Wealth Advisors, L…197$15.2K<0.01%-12113F-HRTimelineGroup
Private Wealth Management Group, LLC163$12.6K<0.01%+2113F-HRTimeline
Cullen/Frost Bankers, Inc.in group Cullen/Frost Bankers, Inc.133$10.2K<0.01%new13F-HRTimelineGroup
Transce3nd, LLC71$9.47K0.08%-2,42713F-HRTimeline
Versant Capital Management, Inc122$9.4K<0.01%+10013F-HRTimeline
CVA Family Office, LLC120$9.25K<0.01%+3713F-HRTimeline
Smartleaf Asset Management LLC120$9.24K<0.01%+4813F-HRTimeline
BESSEMER GROUP INCin group BESSEMER GROUP INC97$8K<0.01%+5413F-HRTimelineGroup
ASSETMARK, INCin group ASSETMARK, INC94$7.24K<0.01%+1913F-HRTimelineGroup
PRIVATE TRUST CO NA90$6.93K<0.01%013F-HRTimeline
Manchester Capital Management LLC84$6.47K<0.01%+6113F-HRTimeline
Rise Advisors, LLC83$6.42K<0.01%013F-HRTimeline
Optiver Holding B.V.in group Optiver Holding B.V.83$6.4K<0.01%-1313F-HRTimelineGroup
Deseret Mutual Benefit Administrators62$4.78K<0.01%013F-HRTimeline
Steward Partners Investment Advisory, L…61$4.71K<0.01%+2213F-HRTimeline
TRUST CO OF VERMONT50$3.85K<0.01%013F-HRTimeline
TD Waterhouse Canada Inc.50$3.84K<0.01%+1013F-HRTimeline
FIRST HORIZON CORP48$3.7K<0.01%13F-HRTimeline
Parkside Financial Bank & Trust47$3.62K<0.01%-2713F-HRTimeline
Pinnacle Bancorp, Inc.43$3.31K<0.01%new13F-HRTimeline
MV CAPITAL MANAGEMENT, INC.41$3.16K<0.01%+313F-HRTimeline
Bruce G. Allen Investments, LLC39$3K<0.01%-413F-HRTimeline
Wealthspire Advisors, LLC37$2.85K<0.01%new13F-HRTimeline
Root Financial Partners, LLC37$2.85K<0.01%new13F-HRTimeline
FARMERS & MERCHANTS INVESTMENTS INCin group FARMERS & MERCHANTS INVESTMEN…30$2.31K<0.01%+313F-HRTimelineGroup
Sachetta, LLC26$2K<0.01%+713F-HRTimeline
Hemington Wealth Management29$2K<0.01%+213F-HRTimeline
Clearstead Advisors, LLC25$1.93K<0.01%013F-HRTimeline
Peterson Wealth Services1,835$1.77K<0.01%+1,81213F-HRTimeline
Larson Financial Group LLC23$1.77K<0.01%-113F-HRTimeline
Bell Investment Advisors, Inc18$1.39K<0.01%+613F-HRTimeline
ROTHSCHILD INVESTMENT LLC17$1.31K<0.01%+213F-HRTimeline
Global Retirement Partners, LLC17$1.31K<0.01%013F-HRTimeline
Blue Trust, Inc.15$1.16K<0.01%-3413F-HRTimeline
Advisory Services Network, LLC15$1.16K<0.01%new13F-HRTimeline
Fortitude Family Office, LLC14$1.08K<0.01%-613F-HRTimeline
OGOREK ANTHONY JOSEPH /NY/ /ADV18$1K<0.01%013F-HRTimeline
Avion Wealth17$1K<0.01%013F-HRTimeline
PICTON MAHONEY ASSET MANAGEMENT8$1K<0.01%013F-HRTimeline
SouthState Bank Corpin group SouthState Bank Corp11$848<0.01%-113F-HRTimelineGroup
Jackson, Grant Investment Advisers, Inc.11$848<0.01%013F-HRTimeline
RAFFA WEALTH MANAGEMENT, LLC9$694<0.01%013F-HRTimeline
Principia Wealth Advisory, LLC8$616<0.01%013F-HRTimeline
HARBOUR INVESTMENTS, INC.7$539<0.01%new13F-HRTimeline
CoreCap Advisors, LLC5$385<0.01%013F-HRTimeline
SWAN Capital LLC5$385<0.01%013F-HRTimeline
DiNuzzo Private Wealth, Inc.4$352<0.01%013F-HRTimeline
True Wealth Design, LLC4$309<0.01%-213F-HRTimeline
Core Alternative Capital4$308<0.01%-313F-HRTimeline
Cromwell Holdings LLC2$155<0.01%new13F-HRTimeline
New Millennium Group LLC2$154<0.01%new13F-HRTimeline
Valued Wealth Advisors LLC1$79<0.01%013F-HRTimeline
Bay Harbor Wealth Management, LLC1$77<0.01%new13F-HRTimeline
SBI Securities Co., Ltd.1$77<0.01%013F-HRTimeline
Rakuten Securities, Inc.in group Rakuten Group, Inc.1$77<0.01%-1013F-HRTimelineGroup
HFM Investment Advisors, LLC1$77<0.01%013F-HRTimeline
Penserra Capital Management LLCin group Penserra Capital Management L…9$00%-313F-HRTimelineGroupValue filed as zero, left out of ratios.
Cloud Capital Management, LLC2$00%new13F-HRTimelineValue filed as zero, left out of ratios.