Public record / Tickers / WLK

WLK — WESTLAKE CORP†

Both disclosure regimes on one name: who in Congress filed about WLK, which institutions reported holding it. Each section keeps its own clock — congressional trades on the 45-day PTR clock, 13F holdings as quarter-end snapshots.

Congress txns
28
all PTR rows naming WLK
Members · 12m
0
0 buys · 0 sells · by trade date
Latest PTR
07-13
filed 2021-07-13
13F holders
309
top-309 slice · 2026-03-31
Congress = transactions in statutory ranges, 45-day lag · Institutions = quarter-end positions, 45-day lagas of 2026-10-01 13:54 UTCno price data — a disclosure record, not a chart

David Perdue · $15.0K–$50.0K

SELL · traded 2017-08-04 → filed 2017-08-28. Ranked over every WLK row by the provable lower bound, never a point estimate.

No member disclosed WLK in the trailing 12 months

Counts of disclosures by trade date, not dollars — ranges cannot be netted across members. Flow ranges per member are in the table below.

3 rows filed past the 45-day window

Late disclosure is stated on the row, never editorialised. Both dates and the receipt stay on every row.

Congress · disclosure timeline

TRADE DATES · 24M · ▲ BUY ▼ SELL · HEIGHT = LOG LOWER BOUND

No dated WLK rows fall inside the trailing 24 months by trade date.

Trade date, not filing date — the lag lives in the table below. 0 rows placed.

PLANNED institutional holder flow by quarter

Congressional disclosures

ALL PTR ROWS NAMING WLK · SORTED FILED ↓ · STATUTORY RANGES · FILED ≤45D LATEfull congressional view ↗
Latest congressional filings mentioning WLK
FiledMemberSide · OwnerTraded · LagAmountRange · FlagsSrc
2021-07-13Susie Lee D–NV-3SELL JT (jointly owned)Traded 06-10 +33d$1K–$15K
2021-03-16Peter Meijer R–MI-3SELLTraded 02-16 +28d$1K–$15K
2021-01-11Susie Lee D–NV-3BUY JT (jointly owned)Traded 2020-12-16 +26d$1K–$15K
2021-01-11Susie Lee D–NV-3BUY JT (jointly owned)Traded 2020-12-10 +32d$1K–$15K
2020-08-24James Comer R–KY-1SELLTraded 08-06 +18d$1K–$15K
Each row shows the trade date and the filing date; the gap between them is the disclosure lag.all 28 ↗

Members active in WLK

12M · NET LOWER BOUND · COMMITTEES AS OF TRADE DATE · SNAPSHOT 2026-10-01

No member disclosed WLK in the trailing 12 months.

Congress ↔ notable managers · WLK

who in Congress disclosed purchases or sales beside which notable managers added or trimmed

Congress · last 90 days

Buyers
0 — —
Sellers
0 — —

filed 2026-07-03 → 2026-10-01 · totals are statutory ranges

Notable managers · quarter ended 2026-03-31

Trimming
1 Caxton Associates $0 held

NEW + ADD vs TRIM + EXIT, by shares · $ = reported value now, not the change · WESTLAKE CORPORATION

Merged timeline of congressional filings and notable-manager moves on WLK
DateWhoChangeSize
2026-05-15Gotham Asset Management 13FADD+25,365 sh
2026-05-15Duquesne Family Office 13FNEW+21,194 sh
2026-05-14Caxton Associates 13FEXIT−4,615 sh

3 newest rows · every row dates by its filing date: a disclosure's, or the 13F's for the quarter · a 13F row is a quarter-end snapshot, not a trade

Institutional holders · 13F · Quarter ended 2026-03-31 · longs only

full holders view ↗
Top institutional holders of WLK for quarter 2026-03-31
#FilerValueSecuritiesFlagsSrc
1Orbis Allan Gray Ltd$618M1
2Capital World Investors$492M1
3BlackRock, Inc.$360M1
4BRANDES INVESTMENT PARTNERS, LP$215M1
5WELLINGTON MANAGEMENT GROUP LLP$210M1
6VANGUARD PORTFOLIO MANAGEMENT LLC$207M1
7DIMENSIONAL FUND ADVISORS LP$171M1
8VANGUARD CAPITAL MANAGEMENT LLC$170M1
9STATE STREET CORP$161M1
10FMR LLC$153M1
11UBS AM, a distinct business unit of UBS ASSET MANAGEMENT AMERICAS LLC$115M1
12MIRAE ASSET GLOBAL ETFS HOLDINGS Ltd.$110M1
13UBS Group AG$94.8M1
14Holocene Advisors, LP$85.3M1
15CITADEL ADVISORS LLC$83.6M1
16GEODE CAPITAL MANAGEMENT, LLC$71.8M1
17Nuveen, LLC$66.0M1
18MORGAN STANLEY$56.8M1
19SCHRODER INVESTMENT MANAGEMENT GROUP$43.4M1
20BALYASNY ASSET MANAGEMENT L.P.$43.2M1
21JACOBS LEVY EQUITY MANAGEMENT, INC$40.8M1
22Woodline Partners LP$39.4M1
23CHARLES SCHWAB INVESTMENT MANAGEMENT INC$36.4M1
24NEW YORK STATE COMMON RETIREMENT FUND$36.2M1
25ProShare Advisors LLC$34.6M1
26Allspring Global Investments Holdings, LLC$33.3M1
27Janus Henderson Group Ltd.$31.5M1
28NORTHERN TRUST CORP$31.4M1
29FEDERATED HERMES, INC.$31.2M1
30AQR CAPITAL MANAGEMENT LLC$30.4M1
31BANK OF AMERICA CORP /DE/$27.7M1
32D. E. Shaw & Co., Inc.$27.2M1
33Merewether Investment Management, LP$25.7M1
34VANGUARD FIDUCIARY TRUST CO$24.0M1
35DEPRINCE RACE & ZOLLO INC$23.8M1
36Bank of New York Mellon Corp$21.2M1
37Invesco Ltd.$21.0M1
38Ceredex Value Advisors LLC$20.8M1
39Man Group plc$18.7M1
40CAPSTONE INVESTMENT ADVISORS, LLC$15.9M1
41SPROTT INC.$15.5M1
42Quantinno Capital Management LP$14.2M1
43Recurrent Investment Advisors LLC$13.2M1
44Yaupon Capital Management LP$12.5M1
45WELLS FARGO & COMPANY/MN$12.5M1
46JANE STREET GROUP, LLC$12.3M1
47ROYAL BANK OF CANADA$12.1M1
48FIRST TRUST ADVISORS LP$12.0M1
49MILLENNIUM MANAGEMENT LLC$9.9M1
50Meiji Yasuda Asset Management Co Ltd.$9.3M1
51Swiss National Bank$8.9M1
52PDT Partners, LLC$8.9M1
53PRINCIPAL FINANCIAL GROUP INC$8.7M1
54THOMIST CAPITAL MANAGEMENT, LP$8.5M1
55Cerity Partners LLC$8.5M1
56AGMAN CAPITAL LLC$8.4M1
57MACKENZIE FINANCIAL CORP$8.4M1
58Capital International Sarl$7.4M1
59Lloyd Harbor Capital Management, LLC$7.2M1
60Rokos Capital Management LLP$7.1M1
61Walleye Capital LLC$7.0M1
62CITIGROUP INC$6.4M1
63Legal & General Group Plc$5.9M1
64Albar Capital Partners LLP$5.7M1
65Tidal Investments LLC$5.5M1
66VICTORY CAPITAL MANAGEMENT INC$5.3M1
67Trek Financial, LLC$5.3M1
68OCCUDO QUANTITATIVE STRATEGIES LP$5.1M1
69ALLIANCEBERNSTEIN L.P.$5.0M1
70Engineers Gate Manager LP$5.0M1
71Retirement Systems of Alabama$4.8M1
72BANK OF MONTREAL /CAN/$4.6M1
73Squarepoint Ops LLC$4.5M1
74CAPITAL INTERNATIONAL LTD /CA/$4.4M1
75Twin Tree Management, LP$4.2M1
76Corient Private Wealth LLC$4.1M1
77Gotham Asset Management, LLC$4.0M1
78VANGUARD ASSET MANAGEMENT, Ltd$3.9M1
79MANUFACTURERS LIFE INSURANCE COMPANY, THE$3.9M1
80Boston Partners$3.7M1
81Occam Crest Management LP$3.4M1
82AMERIPRISE FINANCIAL INC$3.3M1
83ENVESTNET ASSET MANAGEMENT INC$3.3M1
84STATE OF WISCONSIN INVESTMENT BOARD$2.9M1
85CALIFORNIA PUBLIC EMPLOYEES RETIREMENT SYSTEM$2.9M1
86STIFEL FINANCIAL CORP$2.9M1
87STATE BOARD OF ADMINISTRATION OF FLORIDA RETIREMENT SYSTEM$2.8M1
88Quantbot Technologies LP$2.8M1
89State of New Jersey Common Pension Fund D$2.8M1
90AMG National Trust Bank$2.7M1
91Capital International, Inc./CA/$2.5M1
92Ameritas Investment Partners, Inc.$2.4M1
93AMERICAN CENTURY COMPANIES INC$2.3M1
94Zurcher Kantonalbank (Zurich Cantonalbank)$2.2M1
95Dana Investment Advisors, Inc.$2.2M1
96WORLDQUANT MILLENNIUM ADVISORS LLC$2.1M1
97Susquehanna Portfolio Strategies, LLC$2.1M1
98Edgestream Partners, L.P.$2.1M1
99MetLife Investment Management, LLC$1.9M1
100FIFTH THIRD BANCORP$1.9M1
101STOREBRAND ASSET MANAGEMENT AS$1.8M1
102SUSQUEHANNA INTERNATIONAL GROUP, LLP$1.8M1
103BARCLAYS PLC$1.7M1
104SummitTX Capital, L.P.$1.7M1
105Vanguard Global Advisers, LLC$1.6M1
106NOMURA ASSET MANAGEMENT INTERNATIONAL INC.$1.6M1
107LPL Financial LLC$1.5M1
108XTX Topco Ltd$1.5M1
109MUTUAL OF AMERICA CAPITAL MANAGEMENT LLC$1.5M1
110SEI INVESTMENTS CO$1.5M1
111Summit Trail Advisors, LLC$1.5M1
112Polymer Capital Management (US) LLC$1.5M1
113Universal- Beteiligungs- und Servicegesellschaft mbH$1.5M1
114Creative Planning$1.4M1
115Mitsubishi UFJ Asset Management Co., Ltd.$1.3M1
116Arizona State Retirement System$1.2M1
117YOUSIF CAPITAL MANAGEMENT, LLC$1.2M1
118Schonfeld Strategic Advisors LLC$1.2M1
119Walnut Level Capital LLC$1.2M1
120Vanguard Investments Australia, Ltd.$1.2M1
121PUBLIC EMPLOYEES RETIREMENT SYSTEM OF OHIO$1.1M1
122Inspire Investing, LLC$1.1M1
123Vanguard Personalized Indexing Management, LLC$1.1M1
124KLP KAPITALFORVALTNING AS$993K1
125COMMONWEALTH OF PENNSYLVANIA PUBLIC SCHOOL EMPLS RETRMT SYS$976K1
126WINTON GROUP Ltd$961K1
127Aster Capital Management (DIFC) Ltd$943K1
128STATE OF MICHIGAN RETIREMENT SYSTEM$935K1
129TWIN FOCUS CAPITAL PARTNERS, LLC$935K1
130Total Wealth Planning & Management, Inc.$900K1
131Capital Group Investment Management Pte. Ltd.$899K1
132Eurizon Capital SGR S.p.A.$878K1
133NORTHWESTERN MUTUAL INVESTMENT MANAGEMENT COMPANY, LLC$873K1
134Dynamic Technology Lab Private Ltd$859K1
135GATEWAY INVESTMENT ADVISERS LLC$835K1
136First Eagle Investment Management, LLC$832K1
137OREGON PUBLIC EMPLOYEES RETIREMENT FUND$802K1
138Concentric Capital Strategies, LP$761K1
139Pictet Asset Management Holding SA$708K1
140MERCER GLOBAL ADVISORS INC /ADV$668K1
141Advisors Asset Management, Inc.$660K1
142Storgate, LLC$644K1
143Unison Advisors LLC$613K1
144Caprock Group, LLC$604K1
145Pathstone Holdings, LLC$579K1
146Hartree Partners, LP$502K1
147GUGGENHEIM CAPITAL LLC$481K1
148XPONANCE LLC$466K1
149CIBC Asset Management Inc$465K1
150Cetera Investment Advisers$458K1
151Marnell Management LLC$444K1
152Atria Investments, Inc$442K1
153EVERGREEN CAPITAL MANAGEMENT LLC$427K1
154Sanctuary Advisors, LLC$382K1
155Havemeyer Place LP$380K1
156TWINBEECH CAPITAL LP$345K1
157RAYMOND JAMES FINANCIAL INC$342K1
158Odyssean, LLC$339K1
159iSAM Funds (UK) Ltd$331K1
160WEALTH ENHANCEMENT ADVISORY SERVICES, LLC$309K1
161Archer Investment Corp$291K1
162VOYA INVESTMENT MANAGEMENT LLC$285K1
163SECURIAN ASSET MANAGEMENT, INC$281K1
164MFA WEALTH ADVISORS, LLC$278K1
165DEUTSCHE BANK AG\$277K1
166HighTower Advisors, LLC$269K1
167Swiss Life Asset Management Ltd$263K1
168CWM, LLC$263K1
169PRUDENTIAL FINANCIAL INC$260K1
170BROWN ADVISORY INC$260K1
171CANADA PENSION PLAN INVESTMENT BOARD$258K1
172CoreFirst Bank & Trust$256K1
173US BANCORP \DE\$254K1
174Empowered Funds, LLC$253K1
175Sivia Capital Partners, LLC$245K1
176EAGLE GLOBAL ADVISORS LLC$241K1
177Callan Family Office, LLC$236K1
178Verition Fund Management LLC$234K1
179Amundi$233K1
180Federation des caisses Desjardins du Quebec$232K1
181Cercano Management LLC$231K1
182Maryland State Retirement & Pension System$224K1
183Greenland Capital Management LP$212K1
184Utah Retirement Systems$210K1
185Laird Norton Wetherby Trust Company, LLC$205K1
186Virtus Investment Advisers, LLC$203K1
187OPPENHEIMER & CO INC$203K1
188Allworth Financial LP$199K1
189MAI Capital Management$191K1
190Kimelman & Baird, LLC$175K1
191TD Waterhouse Canada Inc.$160K1
192Tower Research Capital LLC (TRC)$158K1
193Transamerica Financial Advisors, LLC$152K1
194SIGNATUREFD, LLC$134K1
195Sterling Capital Management LLC$131K1
196PICKERING ENERGY PARTNERS LP$117K1
197Compagnie Lombard Odier SCmA$100K1
198Rockefeller Capital Management L.P.$100K1
199NOMURA ASSET MANAGEMENT CO LTD$78.3K1
200EXCHANGE TRADED CONCEPTS, LLC$62.6K1
201BNP Paribas Asset Management Holding S.A.$62.5K1
202Walleye Trading LLC$60.0K1
203Destiny Wealth Partners, LLC$59.6K1
204QUADRANT CAPITAL GROUP LLC$44.6K1
205UMB Bank, n.a.$36.4K1
206Deseret Mutual Benefit Administrators$29.0K1
207Arax Advisory Partners$27.1K1
208Smartleaf Asset Management LLC$24.7K1
209OSAIC HOLDINGS, INC.$22.2K1
210NISA INVESTMENT ADVISORS, LLC$21.6K1
211NATIONAL BANK OF CANADA /FI/$21.3K1
212Spire Wealth Management$20.1K1
213CVA Family Office, LLC$9.8K1
214Parkside Financial Bank & Trust$7.9K1
215Rakuten Securities, Inc.$7.5K1
216Pinnacle Wealth Planning Services, Inc.$6.8K1
217Larson Financial Group LLC$6.7K1
218Sachetta, LLC$6.3K1
219ASSETMARK, INC$5.1K1
220Private Wealth Management Group, LLC$4.2K1
221Purpose Unlimited Inc.$4.0K1
222FARMERS & MERCHANTS INVESTMENTS INC$3.5K1
223JFS WEALTH ADVISORS, LLC$3.5K1
224Keating Financial Advisory Services, Inc.$3.5K1
225True Wealth Design, LLC$3.2K1
226Peterson Wealth Services$2.7K1
227SJS Investment Consulting Inc.$2.6K1
228Duquesne Family Office LLC$2.5K1
229Manchester Capital Management LLC$2.5K1
230South Dakota Investment Council$2.4K1
231CANADA LIFE ASSURANCE Co$2.3K1
232KBC Group NV$2.3K1
233SouthState Bank Corp$2.1K1
234Clearstead Advisors, LLC$2.1K1
235Treasurer of the State of North Carolina$1.7K1
236TEACHERS RETIREMENT SYSTEM OF THE STATE OF KENTUCKY$1.5K1
237Rialto Wealth Management, LLC$1.4K1
238Steward Partners Investment Advisory, LLC$1.2K1
239Virtu Financial LLC$1.1K1
240DiNuzzo Private Wealth, Inc.$1.1K1
241PICTON MAHONEY ASSET MANAGEMENT$9351
242THRIVENT FINANCIAL FOR LUTHERANS$8781
243ELEVATION WEALTH PARTNERS, LLC$8181
244American Capital Advisory, LLC$8181
245MV CAPITAL MANAGEMENT, INC.$7011
246Vermillion Wealth Management, Inc.$7011
247HFM Investment Advisors, LLC$7011
248GSA CAPITAL PARTNERS LLP$5961
249SWAN Capital LLC$5841
250NEW YORK STATE TEACHERS RETIREMENT SYSTEM$4841
251Cromwell Holdings LLC$4671
252Arlington Trust Co LLC$4671
253State of Alaska, Department of Revenue$3911
254Investors Portfolio Services LLC$3761
255Claret Asset Management Corp$3511
256TopTier Wealth Management, LLC$3501
257NORTHWESTERN MUTUAL WEALTH MANAGEMENT CO$2341
258SBI Securities Co., Ltd.$2341
259Activest Wealth Management$2341
260Valued Wealth Advisors LLC$1211
2613 FACTOR INDEXING, LLC$1171
262Penserra Capital Management LLC$11
263Avion Wealth$11
264VANGUARD GROUP INC— value not disclosed1
265HARBOUR INVESTMENTS, INC.— value not disclosed1
266COMERICA BANK— value not disclosed1
267WEDGE CAPITAL MANAGEMENT L L P/NC— value not disclosed1
268WEXFORD CAPITAL LP— value not disclosed1
269CI INVESTMENTS INC.— value not disclosed1
270TWO SIGMA INVESTMENTS, LP— value not disclosed1
271LAZARD ASSET MANAGEMENT LLC— value not disclosed1
272DIAMOND HILL CAPITAL MANAGEMENT INC— value not disclosed1
273ALPINE WOODS CAPITAL INVESTORS, LLC— value not disclosed1
274NATIXIS— value not disclosed1
275LUMINUS MANAGEMENT LLC— value not disclosed1
276CIBC Private Wealth Group LLC— value not disclosed1
277Weiss Asset Management LP— value not disclosed1
278NORGES BANK— value not disclosed1
279Hudson Bay Capital Management LP— value not disclosed1
280Alyeska Investment Group, L.P.— value not disclosed1
281DekaBank Deutsche Girozentrale— value not disclosed1
282Alberta Investment Management Corp— value not disclosed1
283TWO SIGMA ADVISERS, LP— value not disclosed1
284Daiwa Securities Group Inc.— value not disclosed1
285SIMPLEX TRADING, LLC— value not disclosed1
286Brevan Howard Capital Management LP— value not disclosed1
287Assenagon Asset Management S.A.— value not disclosed1
288VOLORIDGE INVESTMENT MANAGEMENT, LLC— value not disclosed1
289HITE Hedge Asset Management LLC— value not disclosed1
290Select Equity Group, L.P.— value not disclosed1
291ANTIPODES PARTNERS Ltd— value not disclosed1
292Numerai GP LLC— value not disclosed1
293DV Trading LLC— value not disclosed1
294ExodusPoint Capital Management, LP— value not disclosed1
295Global Retirement Partners, LLC— value not disclosed1
296Oak Thistle LLC— value not disclosed1
297Lloyd Advisory Services, LLC.— value not disclosed1
298Aventail Capital Group, LP— value not disclosed1
299State of Wyoming— value not disclosed1
300Kestra Advisory Services, LLC— value not disclosed1
301Blue Trust, Inc.— value not disclosed1
302AlphaQuest LLC— value not disclosed1
303SageView Advisory Group, LLC— value not disclosed1
304Dunhill Financial, LLC— value not disclosed1
305Quarry LP— value not disclosed1
306Jain Global LLC— value not disclosed1
307CAXTON ASSOCIATES LLP— value not disclosed1
308OPTIMA CAPITAL LLC— value not disclosed1
309VARCOV Co.— value not disclosed1
Truncated by Public Filings. Every one of the 263 13F filers reporting this share class for the quarter is listed. methodology §13F ↗
§ derived by Public Filings from this build's reviewed ticker-mapping holders list for this share class; that list carries each holder's share count, share change and filed date (the full holders view shows them), but no document links — the EDGAR link opens the filer's 13F list
n/c Newest filing in this build: 2026-07-31. Per-row filing dates are on each receipt.

Crowding — not available in this build. No holder rows for the selected period, so no percentile can be ranked.

Do the two regimes agree?

TRAILING 12M · CONGRESS vs FILERS NET
Congress net (rows)no rows
Congress net ($ bound)$0
Filers net (actions)not in build
Filers net ($ Q/Q)not in build

The filer side needs per-issuer quarter-over-quarter actions, which the published aggregate does not carry for this issuer. Convergence and divergence are stated only when both sides are computed.

Signals on WLK

RETAINED WINDOW · ACTIVE HITS

Zero hits on WLK in the retained window — a computed answer over every rule, not missing coverage.

Every rule, with its definition →

Planned modules for WLK · financials and macro

Financials — as filed PLANNED

WLK's as-reported XBRL fundamentals will appear here when the financials module passes its gates. Until then: WLK on EDGAR ↗

Macro context PLANNED

Rates, inflation, and positioning series land here with the macro module — vintage-aware, never nowcast.

† issuer name from the SEC's present-day ticker file (company_tickers.json) — a present-day mapping, not the name as of each filing