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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
Kestra Advisory Services, LLCin group Kestra Advisory Services, LLC1,138$84.2K<0.01%new13F-HRTimelineGroup
DEUTSCHE BANK AG\in group DEUTSCHE BANK AG\1,084$80.2K<0.01%new13F-HRTimelineGroup
Rockefeller Capital Management L.P.in group Rockefeller Capital Managemen…955$70.6K<0.01%+65613F-HR/ATimelineGroup
NOMURA ASSET MANAGEMENT CO LTDgroup of 2 filers holding896$66.2K-69,220Timeline
Aster Capital Management (DIFC) Ltd820$60.6K0.03%new13F-HRTimeline
Transamerica Financial Advisors, LLCin group Transamerica Financial Adviso…805$59.5K<0.01%+21913F-HRTimelineGroup
STRS OHIO800$59.2K<0.01%+113F-HRTimeline
Tower Research Capital LLC (TRC)in group Tower Research Capital LLC (T…764$56.5K<0.01%-76813F-HRTimelineGroup
NewEdge Advisors, LLC745$55.1K<0.01%013F-HRTimeline
FIFTH THIRD BANCORPin group FIFTH THIRD BANK, NATIONAL AS…562$41.6K<0.01%+23413F-HRTimelineGroup
GAMMA Investing LLC464$34.3K<0.01%+2313F-HRTimeline
QUADRANT CAPITAL GROUP LLC447$33.1K<0.01%-7,44413F-HRTimeline
Quarry LP426$31.5K0.01%new13F-HRTimeline
UMB Bank, n.a.393$29.1K<0.01%-18513F-HRTimelineThe filing omitted confidential holdings, a later amendment may add them.
Parallel Advisors, LLC355$26.2K<0.01%-42313F-HRTimeline
CWM, LLCin group CWM, LLC346$26K<0.01%-33713F-HRTimelineGroup
BNP PARIBAS ASSET MANAGEMENT Holding S.…in group BNP PARIBAS ASSET MANAGEMENT …338$25K<0.01%new13F-HRTimelineGroup
JONES FINANCIAL COMPANIES LLLPin group JONES FINANCIAL COMPANIES LLLP306$22.6K<0.01%-10013F-HRTimelineGroup
Spire Wealth Managementin group Spire Wealth Management306$22.6K<0.01%+3413F-HRTimelineGroup
DV Trading LLC300$22.2K<0.01%13F-HRTimeline
Farther Finance Advisors, LLC300$22.2K<0.01%-20313F-HRTimeline
OSAIC HOLDINGS, INC.in group OSAIC HOLDINGS, INC.280$20.7K<0.01%-2,97813F-HRTimelineGroup
NATIONAL BANK OF CANADA /FI/in group NATIONAL BANK OF CANADA /FI/275$20.3K<0.01%-1213F-HRTimelineGroup
MassMutual Private Wealth & Trust, FSB274$20.3K<0.01%+4313F-HRTimeline
Parkside Financial Bank & Trust268$19.8K<0.01%+22113F-HRTimeline
Quent Capital, LLC232$17.2K<0.01%+2913F-HRTimeline
LANARK FINANCIAL, INC.204$15.1K<0.01%013F-HRTimeline
CIBC Private Wealth Group LLCin group CIBC Bancorp USA Inc.191$14.1K<0.01%-49513F-HRTimelineGroup
Blue Trust, Inc.186$13.8K<0.01%+17113F-HRTimeline
EverSource Wealth Advisors, LLCin group EverSource Wealth Advisors, L…170$12.6K<0.01%-2713F-HRTimelineGroup
Cullen/Frost Bankers, Inc.in group Cullen/Frost Bankers, Inc.164$12.1K<0.01%+3113F-HRTimelineGroup
LOS ANGELES CAPITAL MANAGEMENT LLC157$10.7K<0.01%new13F-HRTimeline
SIGNATUREFD, LLC142$10.5K<0.01%-31213F-HRTimeline
Deseret Mutual Benefit Administrators133$9.83K<0.01%+7113F-HRTimeline
HUNTINGTON NATIONAL BANKin group HUNTINGTON NATIONAL BANK119$8.8K<0.01%-23113F-HRTimelineGroup
Clearstead Advisors, LLC109$8.06K<0.01%+8413F-HRTimeline
Smartleaf Asset Management LLC101$7.56K<0.01%-1913F-HRTimeline
Ancora Advisors LLCin group Ancora Advisors LLC97$7.17K<0.01%new13F-HRTimelineGroup
PRIVATE TRUST CO NA90$6.66K<0.01%013F-HRTimeline
Transce3nd, LLC71$5.8K0.05%013F-HRTimeline
Pinnacle Bancorp, Inc.58$4.29K<0.01%+1513F-HRTimeline
Pinnacle Wealth Planning Services, Inc.58$4.29K<0.01%new13F-HRTimeline
Sachetta, LLC54$3.99K<0.01%+2813F-HRTimeline
First Eagle Investment Management, LLCin group First Eagle Investment Manage…53$3.92K<0.01%new13F-HRTimelineGroup
NISA INVESTMENT ADVISORS, LLC50$3.7K<0.01%-28213F-HRTimeline
TRUST CO OF VERMONT50$3.7K<0.01%013F-HRTimeline
IFP Advisors, Inc40$2.96K<0.01%-24713F-HRTimeline
SageView Advisory Group, LLC40$2.96K<0.01%new13F-HRTimeline
TD Waterhouse Canada Inc.40$2.96K<0.01%-1013F-HRTimeline
Basecamp Wealth Advisors LLC40$2.96K<0.01%13F-HRTimeline
ASSETMARK, INCin group ASSETMARK, INC39$2.88K<0.01%-5513F-HRTimelineGroup
HARBOUR INVESTMENTS, INC.37$2.74K<0.01%+3013F-HRTimeline
Private Wealth Management Group, LLC36$2.66K<0.01%-12713F-HRTimeline
Torren Management, LLC34$2.5K<0.01%13F-HRTimeline
Bruce G. Allen Investments, LLC31$2.29K<0.01%-813F-HRTimeline
FARMERS & MERCHANTS INVESTMENTS INCin group FARMERS & MERCHANTS INVESTMEN…30$2.22K<0.01%013F-HRTimelineGroup
Steward Partners Investment Advisory, L…24$1.77K<0.01%-3713F-HRTimeline
CoreCap Advisors, LLC24$1.77K<0.01%+1913F-HRTimeline
Root Financial Partners, LLC24$1.77K<0.01%-1313F-HRTimeline
FIRST HORIZON CORP24$1.77K<0.01%-2413F-HRTimeline
Larson Financial Group LLC23$1.7K<0.01%013F-HRTimeline
Peterson Wealth Services23$1.7K<0.01%-1,81213F-HRTimeline
Global Wealth Strategies & Associates23$1.7K<0.01%new13F-HRTimeline
BROWN BROTHERS HARRIMAN & COin group BROWN BROTHERS HARRIMAN & CO21$1.55K<0.01%new13F-HRTimelineGroup
Manchester Capital Management LLC21$1.55K<0.01%-6313F-HRTimeline
Global Retirement Partners, LLC21$1.55K<0.01%+413F-HRTimeline
Arax Advisory Partners20$1.48K<0.01%-6,96313F-HRTimeline
AdvisorNet Financial, Inc19$1.41K<0.01%new13F-HRTimeline
Versant Capital Management, Inc18$1.33K<0.01%-10413F-HRTimeline
True Wealth Design, LLC18$1.33K<0.01%+1413F-HRTimeline
ROTHSCHILD INVESTMENT LLC15$1.11K<0.01%-213F-HRTimeline
JFS WEALTH ADVISORS, LLC14$1.04K<0.01%new13F-HRTimeline
OGOREK ANTHONY JOSEPH /NY/ /ADV18$1K<0.01%013F-HRTimeline
Avion Wealth14$1K<0.01%-313F-HRTimeline
Fortitude Family Office, LLC10$739<0.01%-413F-HRTimeline
RAFFA WEALTH MANAGEMENT, LLC9$665<0.01%013F-HRTimeline
SouthState Bank Corpin group SouthState Bank Corp8$592<0.01%-313F-HRTimelineGroup
PICTON MAHONEY ASSET MANAGEMENT8$592<0.01%013F-HRTimeline
Principia Wealth Advisory, LLC8$592<0.01%013F-HRTimeline
American Capital Advisory, LLC7$518<0.01%new13F-HRTimeline
Rialto Wealth Management, LLC7$518<0.01%new13F-HRTimeline
Rakuten Securities, Inc.in group Rakuten Group, Inc.6$444<0.01%+513F-HRTimelineGroup
MV CAPITAL MANAGEMENT, INC.5$370<0.01%-3613F-HRTimeline
SWAN Capital LLC5$370<0.01%013F-HRTimeline
Cromwell Holdings LLC4$296<0.01%+213F-HRTimeline
OPTIMA CAPITAL LLC3$222<0.01%new13F-HRTimeline
DiNuzzo Private Wealth, Inc.2$148<0.01%-213F-HRTimeline
Bay Harbor Wealth Management, LLC2$147<0.01%+113F-HRTimeline
Valued Wealth Advisors LLC1$76<0.01%013F-HRTimeline
SBI Securities Co., Ltd.1$74<0.01%013F-HRTimeline
Hughes Financial Services, LLC1$74<0.01%new13F-HRTimeline
HFM Investment Advisors, LLC1$74<0.01%013F-HRTimeline
Keating Financial Advisory Services, In…1$74<0.01%13F-HRTimeline
Dunhill Financial, LLC1$53<0.01%new13F-HRTimeline
Penserra Capital Management LLCin group Penserra Capital Management L…9$00%013F-HRTimelineGroupValue filed as zero, left out of ratios.