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Disclosery

WLK WESTLAKE CORPORATION

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COM (common), issuer CIK 1262823

326 managers (339 13F filers) reported a position in WLK shares at 2026-03-31, 44,111,547 shares in all. 86 filers opened a position and 47 filers sold out during the quarter.

Managers
326
13F filers
339
New
86
Added
117
Reduced
87
Sold out
47
Shares held by filers
44,111,547

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, Q1 2026

Filers in the available 13F reports with a share position at 2026-03-31, 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
CoreFirst Bank & Trust2,195$256K0.14%-2513F-HRTimeline
HANTZ FINANCIAL SERVICES, INC.2,177$254K<0.01%+62413F-HRTimelineThe filing omitted confidential holdings, a later amendment may add them.
US BANCORP \DE\in group US BANCORP \DE\2,170$254K<0.01%+16013F-HRTimelineGroup
Empowered Funds, LLC2,162$253K<0.01%new13F-HR/ATimeline
Sivia Capital Partners, LLC2,099$245K0.05%new13F-HRTimeline
EAGLE GLOBAL ADVISORS LLC2,066$241K0.01%new13F-HRTimeline
Callan Family Office, LLC2,017$236K0.01%new13F-HRTimeline
Verition Fund Management LLC2,000$234K<0.01%-24,07813F-HRTimeline
Amundiin group Amundi1,997$233K<0.01%new13F-HRTimelineGroup
Federation des caisses Desjardins du Qu…1,990$232K<0.01%-56913F-HRTimeline
Cercano Management LLC1,978$231K0.01%new13F-HRTimeline
Maryland State Retirement & Pension Sys…1,915$224K<0.01%new13F-HRTimeline
Greenland Capital Management LP1,812$212K0.04%new13F-HRTimeline
Utah Retirement Systems1,800$210K<0.01%new13F-HRTimeline
Laird Norton Wetherby Trust Company, LLCin group Laird Norton Wetherby Trust C…1,752$205K<0.01%new13F-HRTimelineGroup
Virtus Investment Advisers, LLCin group Virtus Investment Advisers, L…1,736$203K0.06%-45013F-HRTimelineGroup
OPPENHEIMER & CO INCin group OPPENHEIMER ASSET MANAGEMENT …1,735$203K<0.01%new13F-HRTimelineGroup
PUBLIC EMPLOYEES RETIREMENT ASSOCIATION…1,704$199K<0.01%013F-HRTimeline
Allworth Financial LP1,701$199K<0.01%+26313F-HRTimeline
MAI Capital Management1,631$191K<0.01%+31513F-HRTimeline
PNC Financial Services Group, Inc.in group PNC Financial Services Group,…1,522$178K<0.01%+18713F-HRTimelineGroup
Kimelman & Baird, LLC1,500$175K0.01%013F-HRTimeline
TD Waterhouse Canada Inc.1,375$160K<0.01%+1,33513F-HRTimeline
Tower Research Capital LLC (TRC)in group Tower Research Capital LLC (T…1,356$158K<0.01%+59213F-HRTimelineGroup
Transamerica Financial Advisors, LLCin group Transamerica Financial Adviso…1,300$152K0.01%+49513F-HRTimelineGroup
SIGNATUREFD, LLC1,148$134K<0.01%+1,00613F-HRTimeline
Sterling Capital Management LLC1,122$131K<0.01%-85513F-HRTimeline
PICKERING ENERGY PARTNERS LP1,000$117K0.24%new13F-HR/ATimeline
Compagnie Lombard Odier SCmA860$100K<0.01%new13F-HRTimeline
Rockefeller Capital Management L.P.in group Rockefeller Capital Managemen…857$100K<0.01%-9813F-HRTimelineGroup
Parallel Advisors, LLC830$97K<0.01%+47513F-HR/ATimeline
STRS OHIO799$93.3K<0.01%-113F-HRTimeline
NewEdge Advisors, LLC689$80.5K<0.01%-5613F-HR/ATimeline
Covestor Ltd541$63K0.04%-1,12113F-HRTimeline
EXCHANGE TRADED CONCEPTS, LLC536$62.6K<0.01%new13F-HRTimeline
BNP PARIBAS ASSET MANAGEMENT Holding S.…in group BNP PARIBAS ASSET MANAGEMENT …535$62.5K<0.01%+19713F-HRTimelineGroup
GAMMA Investing LLC531$62K<0.01%+6713F-HRTimeline
Destiny Wealth Partners, LLC510$59.6K0.01%new13F-HRTimeline
QUADRANT CAPITAL GROUP LLC382$44.6K<0.01%-6513F-HR/ATimeline
JONES FINANCIAL COMPANIES LLLPin group JONES FINANCIAL COMPANIES LLLP361$40.8K<0.01%+5513F-HRTimelineGroup
UMB Bank, n.a.312$36.4K<0.01%-8113F-HRTimelineThe filing omitted confidential holdings, a later amendment may add them.
Farther Finance Advisors, LLC289$33.7K<0.01%-1113F-HRTimeline
MassMutual Private Wealth & Trust, FSB274$32K<0.01%013F-HRTimeline
Deseret Mutual Benefit Administrators248$29K0.01%+11513F-HRTimeline
Quent Capital, LLC238$27.8K<0.01%+613F-HRTimeline
EverSource Wealth Advisors, LLCin group EverSource Wealth Advisors, L…234$27.3K<0.01%+6413F-HR/ATimelineGroup
Arax Advisory Partners232$27.1K<0.01%+21213F-HRTimeline
Smartleaf Asset Management LLC213$24.7K<0.01%+11213F-HRTimeline
LANARK FINANCIAL, INC.200$23.4K<0.01%-413F-HRTimeline
OSAIC HOLDINGS, INC.in group OSAIC HOLDINGS, INC.190$22.2K<0.01%-9013F-HRTimelineGroup
Advisory Services Network, LLC187$21.8K<0.01%new13F-HRTimeline
NISA INVESTMENT ADVISORS, LLC185$21.6K<0.01%+13513F-HRTimeline
NATIONAL BANK OF CANADA /FI/in group NATIONAL BANK OF CANADA /FI/182$21.3K<0.01%-9313F-HRTimelineGroup
Spire Wealth Managementin group Spire Wealth Management172$20.1K<0.01%-13413F-HRTimelineGroup
Root Financial Partners, LLC172$20.1K<0.01%+14813F-HRTimeline
Cullen/Frost Bankers, Inc.in group Cullen/Frost Bankers, Inc.165$19.3K<0.01%+113F-HRTimelineGroup
LOS ANGELES CAPITAL MANAGEMENT LLC157$18.3K<0.01%013F-HRTimeline
HUNTINGTON NATIONAL BANKin group HUNTINGTON NATIONAL BANK119$13.9K<0.01%013F-HRTimelineGroup
Versant Capital Management, Inc101$11.8K<0.01%+8313F-HRTimeline
Ancora Advisors LLCin group Ancora Advisors LLC97$11.3K<0.01%013F-HRTimelineGroup
PRIVATE TRUST CO NA90$10.5K<0.01%013F-HRTimeline
CVA Family Office, LLC84$9.81K<0.01%new13F-HRTimeline
Parkside Financial Bank & Trust68$7.94K<0.01%-20013F-HRTimeline
Ascentis Independent Advisorsin group Ascentis Wealth Management, L…66$7.71K<0.01%new13F-HRTimelineGroup
Rakuten Securities, Inc.in group Rakuten Group, Inc.64$7.48K<0.01%+5813F-HRTimelineGroup
BESSEMER GROUP INCin group BESSEMER GROUP INC60$7K<0.01%new13F-HRTimelineGroup
Pinnacle Wealth Planning Services, Inc.58$6.78K<0.01%013F-HRTimeline
Larson Financial Group LLC57$6.66K<0.01%+3413F-HRTimeline
BROWN BROTHERS HARRIMAN & COin group BROWN BROTHERS HARRIMAN & CO55$6.42K<0.01%+3413F-HRTimelineGroup
Sachetta, LLC54$6.31K<0.01%013F-HRTimeline
Fortitude Family Office, LLC52$6.08K<0.01%+4213F-HRTimeline
ROTHSCHILD INVESTMENT LLC47$5.49K<0.01%+3213F-HRTimeline
Basecamp Wealth Advisors LLC45$5.26K<0.01%+513F-HRTimeline
ASSETMARK, INCin group ASSETMARK, INC44$5.14K<0.01%+513F-HRTimelineGroup
Private Wealth Management Group, LLC36$4.21K<0.01%013F-HRTimeline
Purpose Unlimited Inc.in group Purpose Unlimited Inc.34$3.97K<0.01%new13F-HRTimelineGroup
Transce3nd, LLC33$3.85K0.03%-3813F-HRTimeline
HARBOUR INVESTMENTS, INC.32$3.74K<0.01%-513F-HRTimeline
Bruce G. Allen Investments, LLC31$3.62K<0.01%013F-HRTimeline
FARMERS & MERCHANTS INVESTMENTS INCin group FARMERS & MERCHANTS INVESTMEN…30$3.5K<0.01%013F-HRTimelineGroup
JFS WEALTH ADVISORS, LLC30$3.5K<0.01%+1613F-HRTimeline
Keating Financial Advisory Services, In…30$3.5K<0.01%+2913F-HRTimeline
True Wealth Design, LLC27$3.15K<0.01%+913F-HRTimeline
FIRST HORIZON CORP24$2.8K<0.01%013F-HRTimeline
CoreCap Advisors, LLC24$2.8K<0.01%013F-HRTimeline
Peterson Wealth Services23$2.69K<0.01%013F-HRTimeline
SJS Investment Consulting Inc.22$2.57K<0.01%new13F-HRTimeline
Manchester Capital Management LLC21$2.45K<0.01%013F-HRTimeline
AdvisorNet Financial, Inc19$2.22K<0.01%013F-HRTimeline
SouthState Bank Corpin group SouthState Bank Corp18$2.1K<0.01%+1013F-HRTimelineGroup
Clearstead Advisors, LLC18$2.1K<0.01%-9113F-HRTimeline
OGOREK ANTHONY JOSEPH /NY/ /ADV18$2K<0.01%013F-HR/ATimeline
Wilkerson Advisory Group LLC16$1.87K<0.01%new13F-HRTimeline
ATLAS CAPITAL ADVISORS INC.14$1.64K<0.01%new13F-HRTimeline
Torren Management, LLC13$1.57K<0.01%-2113F-HRTimeline
Rialto Wealth Management, LLC12$1.4K<0.01%+513F-HRTimeline
Bay Harbor Wealth Management, LLC12$1.4K<0.01%+1013F-HRTimeline
RAFFA WEALTH MANAGEMENT, LLC10$1.17K<0.01%+113F-HRTimeline
Steward Partners Investment Advisory, L…10$1.17K<0.01%-1413F-HRTimeline
DiNuzzo Private Wealth, Inc.9$1.05K<0.01%+713F-HRTimeline
CREATIVE FINANCIAL DESIGNS INC /ADV9$1.05K<0.01%new13F-HRTimeline
Essential Partners LLC9$1.05K<0.01%new13F-HRTimeline
Avion Wealth14$1K<0.01%013F-HRTimeline
Penserra Capital Management LLCin group Penserra Capital Management L…9$1K<0.01%013F-HRTimelineGroup
PICTON MAHONEY ASSET MANAGEMENT8$935<0.01%013F-HRTimeline
Principia Wealth Advisory, LLC8$935<0.01%013F-HRTimeline
ELEVATION WEALTH PARTNERS, LLC7$818<0.01%new13F-HRTimeline
American Capital Advisory, LLC7$818<0.01%013F-HRTimeline
MV CAPITAL MANAGEMENT, INC.6$701<0.01%+113F-HRTimeline
Vermillion Wealth Management, Inc.6$701<0.01%new13F-HRTimeline
HFM Investment Advisors, LLC6$701<0.01%+513F-HRTimeline
SWAN Capital LLC5$584<0.01%013F-HRTimeline
Cromwell Holdings LLC4$467<0.01%013F-HRTimeline
Arlington Trust Co LLCin group Arlington Trust Co LLC4$467<0.01%new13F-HRTimelineGroup
TWIN PEAKS WEALTH ADVISORS, LLC4$467<0.01%new13F-HRTimeline
Dunhill Financial, LLC3$434<0.01%+213F-HRTimeline
Investors Portfolio Services LLC4$376<0.01%new13F-HRTimeline
TopTier Wealth Management, LLC3$350<0.01%new13F-HRTimeline
IFP Advisors, Inc2$234<0.01%-3813F-HRTimeline
SBI Securities Co., Ltd.2$234<0.01%+113F-HRTimeline
Activest Wealth Management2$234<0.01%new13F-HRTimeline
CURIO WEALTH, LLC2$234<0.01%new13F-HRTimeline
Hughes Financial Services, LLC2$234<0.01%+113F-HRTimeline
Valued Wealth Advisors LLC1$121<0.01%013F-HRTimeline
3 FACTOR INDEXING, LLC1$117<0.01%13F-HRTimeline
BARTLETT & CO. WEALTH MANAGEMENT LLC1$115<0.01%new13F-HRTimeline