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 2026-09-14 13:21 UTCno price data — a disclosure record, not a chart

David Perdue · $15.0K–$50.0K

Sale · 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
Filed ▾MemberSide · OwnerTraded · LagAmountRange · FlagsSrc
2021-07-13Susie Lee D–NV-3Sale · JT (jointly owned)Traded 06-10 +33d$1K–$15K
2021-03-16Peter Meijer R–MI-3SaleTraded 02-16 +28d$1K–$15K
2021-01-11Susie Lee D–NV-3Purchase · JT (jointly owned)Traded 2020-12-16 +26d$1K–$15K
2021-01-11Susie Lee D–NV-3Purchase · JT (jointly owned)Traded 2020-12-10 +32d$1K–$15K
2020-08-24James Comer R–KY-1SaleTraded 08-06 +18d$1K–$15K
Traded → filed dates on every rowEach 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 2026-09-14

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 2026-06-16 → 2026-09-14 · 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 · Congress rows date by filing, 13F rows by quarter end · 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
#FilerValue ▾SecuritiesFlagsSrc
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$01
265HARBOUR INVESTMENTS, INC.$01
266COMERICA BANK$01
267WEDGE CAPITAL MANAGEMENT L L P/NC$01
268WEXFORD CAPITAL LP$01
269CI INVESTMENTS INC.$01
270TWO SIGMA INVESTMENTS, LP$01
271LAZARD ASSET MANAGEMENT LLC$01
272DIAMOND HILL CAPITAL MANAGEMENT INC$01
273ALPINE WOODS CAPITAL INVESTORS, LLC$01
274NATIXIS$01
275LUMINUS MANAGEMENT LLC$01
276CIBC Private Wealth Group LLC$01
277Weiss Asset Management LP$01
278NORGES BANK$01
279Hudson Bay Capital Management LP$01
280Alyeska Investment Group, L.P.$01
281DekaBank Deutsche Girozentrale$01
282Alberta Investment Management Corp$01
283TWO SIGMA ADVISERS, LP$01
284Daiwa Securities Group Inc.$01
285SIMPLEX TRADING, LLC$01
286Brevan Howard Capital Management LP$01
287Assenagon Asset Management S.A.$01
288VOLORIDGE INVESTMENT MANAGEMENT, LLC$01
289HITE Hedge Asset Management LLC$01
290Select Equity Group, L.P.$01
291ANTIPODES PARTNERS Ltd$01
292Numerai GP LLC$01
293DV Trading LLC$01
294ExodusPoint Capital Management, LP$01
295Global Retirement Partners, LLC$01
296Oak Thistle LLC$01
297Lloyd Advisory Services, LLC.$01
298Aventail Capital Group, LP$01
299State of Wyoming$01
300Kestra Advisory Services, LLC$01
301Blue Trust, Inc.$01
302AlphaQuest LLC$01
303SageView Advisory Group, LLC$01
304Dunhill Financial, LLC$01
305Quarry LP$01
306Jain Global LLC$01
307CAXTON ASSOCIATES LLP$01
308OPTIMA CAPITAL LLC$01
309VARCOV Co.$01
Truncated by Public Filings. The published aggregate ranks the top 309 holders per issuer — a build parameter of the Public Filings aggregation, not a census. Rows beyond it exist in individual filings on EDGAR. methodology §13F ↗
§ derived by Public Filings from the published aggregate (agg_issuer_top_holders); per-filer filed dates, share counts and document links are not in the published aggregate — 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