Who holds ticker verified against the SEC company list on 2026-09-10 — a reviewed name-and-class mapping row, never an inferred symbol. how tickers are mapped ↗

WESTLAKE CORPORATION · COM · quarter ended 2026-03-31 · 4 members disclosed WLK ↗

13F filers reporting this class for the quarter ended 2026-03-31: 263
sum of the reported values across every holder; NULL values are excluded, never zero-filled: $4.5B
holders whose share count rose or who opened the position (new + add), by shares: 164
holders absent this quarter after holding last quarter — inferred from absence, not a sale record: 46

Holders — quarter ended 2026-03-31

ranked by reported value · Δ shares vs 2025-12-31 · kind by shares

13F holders of WLK ranked by reported value
#	Filer	Reported value	Shares	Δ shares	Change
1	Orbis Allan Gray Ltd	$618M	5,293,519	+906,884	ADD
2	Capital World Investors	$492M	4,211,006	+2,039,682	ADD
3	BlackRock, Inc.	$360M	3,079,087	−182,346	TRIM
4	BRANDES INVESTMENT PARTNERS, LP	$215M	1,842,650	+172,323	ADD
5	WELLINGTON MANAGEMENT GROUP LLP	$210M	1,793,517	−2,427,200	TRIM
6	VANGUARD PORTFOLIO MANAGEMENT LLC	$207M	1,769,808	—	NO PRIOR
7	DIMENSIONAL FUND ADVISORS LP	$171M	1,466,020	−419,658	TRIM
8	VANGUARD CAPITAL MANAGEMENT LLC	$170M	1,455,594	—	NO PRIOR
9	STATE STREET CORP	$161M	1,380,493	−16,140	TRIM
10	FMR LLC	$153M	1,312,473	+1,083,630	ADD
11	UBS AM, a distinct business unit of UBS ASSET MANAGEMENT AMERICAS LLC	$115M	981,405	+56,701	ADD
12	MIRAE ASSET GLOBAL ETFS HOLDINGS Ltd.	$110M	943,975	+67,090	ADD
13	UBS Group AG	$94.8M	811,266	+163,254	ADD
14	Holocene Advisors, LP	$85.3M	730,035	−490,587	TRIM
15	CITADEL ADVISORS LLC	$83.6M	715,586	+512,283	ADD
16	GEODE CAPITAL MANAGEMENT, LLC	$71.8M	614,334	+19,412	ADD
17	Nuveen, LLC	$66.0M	564,744	−88,165	TRIM
18	MORGAN STANLEY	$56.8M	486,508	−273,115	TRIM
19	SCHRODER INVESTMENT MANAGEMENT GROUP	$43.4M	374,508	+374,508	NEW
20	BALYASNY ASSET MANAGEMENT L.P.	$43.2M	369,672	+369,672	NEW
21	JACOBS LEVY EQUITY MANAGEMENT, INC	$40.8M	349,035	−319,370	TRIM
22	Woodline Partners LP	$39.4M	337,075	−291,084	TRIM
23	CHARLES SCHWAB INVESTMENT MANAGEMENT INC	$36.4M	311,762	+14,514	ADD
24	NEW YORK STATE COMMON RETIREMENT FUND	$36.2M	309,626	0	NO CHANGE
25	ProShare Advisors LLC	$34.6M	295,811	−139,450	TRIM
26	Allspring Global Investments Holdings, LLC	$33.3M	285,434	−221,322	TRIM
27	Janus Henderson Group Ltd.	$31.5M	269,783	−64,810	TRIM
28	NORTHERN TRUST CORP	$31.4M	269,149	+515	ADD
29	FEDERATED HERMES, INC.	$31.2M	266,651	+158,921	ADD
30	AQR CAPITAL MANAGEMENT LLC	$30.4M	260,070	+239,535	ADD
31	BANK OF AMERICA CORP /DE/	$27.7M	236,986	+52,551	ADD
32	D. E. Shaw & Co., Inc.	$27.2M	233,183	−253,098	TRIM
33	Merewether Investment Management, LP	$25.7M	219,900	−168,200	TRIM
34	VANGUARD FIDUCIARY TRUST CO	$24.0M	205,684	—	NO PRIOR
35	DEPRINCE RACE & ZOLLO INC	$23.8M	203,366	−860	TRIM
36	Bank of New York Mellon Corp	$21.2M	181,070	+6,752	ADD
37	Invesco Ltd.	$21.0M	179,402	−33,755	TRIM
38	Ceredex Value Advisors LLC	$20.8M	177,900	−57,718	TRIM
39	Man Group plc	$18.7M	160,286	+160,286	NEW
40	CAPSTONE INVESTMENT ADVISORS, LLC	$15.9M	135,808	+132,689	ADD
41	SPROTT INC.	$15.5M	132,610	−7,390	TRIM
42	Quantinno Capital Management LP	$14.2M	121,444	+5,078	ADD
43	Recurrent Investment Advisors LLC	$13.2M	112,790	+37,157	ADD
44	Yaupon Capital Management LP	$12.5M	107,044	+107,044	NEW
45	WELLS FARGO & COMPANY/MN	$12.5M	106,705	+14,826	ADD
46	JANE STREET GROUP, LLC	$12.3M	105,686	+105,686	NEW
47	ROYAL BANK OF CANADA	$12.1M	103,951	+18,681	ADD
48	FIRST TRUST ADVISORS LP	$12.0M	102,299	−44,112	TRIM
49	MILLENNIUM MANAGEMENT LLC	$9.9M	84,997	−342,757	TRIM
50	Meiji Yasuda Asset Management Co Ltd.	$9.3M	79,478	+79,478	NEW
51	Swiss National Bank	$8.9M	75,900	0	NO CHANGE
52	PDT Partners, LLC	$8.9M	75,777	+10,800	ADD
53	PRINCIPAL FINANCIAL GROUP INC	$8.7M	74,481	+2,762	ADD
54	THOMIST CAPITAL MANAGEMENT, LP	$8.5M	73,000	−38,900	TRIM
55	Cerity Partners LLC	$8.5M	72,679	−54,416	TRIM
56	AGMAN CAPITAL LLC	$8.4M	72,283	0	NO CHANGE
57	MACKENZIE FINANCIAL CORP	$8.4M	71,968	+52,135	ADD
58	Capital International Sarl	$7.4M	63,634	+63,634	NEW
59	Lloyd Harbor Capital Management, LLC	$7.2M	62,000	+62,000	NEW
60	Rokos Capital Management LLP	$7.1M	60,800	+60,800	NEW
61	Walleye Capital LLC	$7.0M	59,814	+12,157	ADD
62	CITIGROUP INC	$6.4M	54,559	+27,222	ADD
63	Legal & General Group Plc	$5.9M	50,737	−6,514	TRIM
64	Albar Capital Partners LLP	$5.7M	48,814	+48,814	NEW
65	Tidal Investments LLC	$5.5M	47,820	+47,820	NEW
66	VICTORY CAPITAL MANAGEMENT INC	$5.3M	45,578	−1,068,241	TRIM
67	Trek Financial, LLC	$5.3M	45,296	+45,296	NEW
68	OCCUDO QUANTITATIVE STRATEGIES LP	$5.1M	44,430	+19,250	ADD
69	ALLIANCEBERNSTEIN L.P.	$5.0M	67,315	−1,133	TRIM
70	Engineers Gate Manager LP	$5.0M	42,499	−246,756	TRIM
71	Retirement Systems of Alabama	$4.8M	40,886	+859	ADD
72	BANK OF MONTREAL /CAN/	$4.6M	39,038	+12,115	ADD
73	Squarepoint Ops LLC	$4.5M	38,532	+38,532	NEW
74	CAPITAL INTERNATIONAL LTD /CA/	$4.4M	37,300	+37,300	NEW
75	Twin Tree Management, LP	$4.2M	35,977	+35,977	NEW
76	Corient Private Wealth LLC	$4.1M	34,971	−66,459	TRIM
77	Gotham Asset Management, LLC	$4.0M	34,564	+25,365	ADD
78	VANGUARD ASSET MANAGEMENT, Ltd	$3.9M	33,358	—	NO PRIOR
79	MANUFACTURERS LIFE INSURANCE COMPANY, THE	$3.9M	33,295	−156	TRIM
80	Boston Partners	$3.7M	31,696	+31,696	NEW
81	Occam Crest Management LP	$3.4M	29,256	+29,256	NEW
82	AMERIPRISE FINANCIAL INC	$3.3M	28,487	−20,630	TRIM
83	ENVESTNET ASSET MANAGEMENT INC	$3.3M	28,046	+176	ADD
84	STATE OF WISCONSIN INVESTMENT BOARD	$2.9M	25,252	−459	TRIM
85	CALIFORNIA PUBLIC EMPLOYEES RETIREMENT SYSTEM	$2.9M	25,000	−21,760	TRIM
86	STIFEL FINANCIAL CORP	$2.9M	24,925	+6,004	ADD
87	STATE BOARD OF ADMINISTRATION OF FLORIDA RETIREMENT SYSTEM	$2.8M	24,115	0	NO CHANGE
88	Quantbot Technologies LP	$2.8M	23,936	−15,671	TRIM
89	State of New Jersey Common Pension Fund D	$2.8M	23,658	+23,658	NEW
90	AMG National Trust Bank	$2.7M	23,041	−289	TRIM
91	Capital International, Inc./CA/	$2.5M	21,359	+21,359	NEW
92	Ameritas Investment Partners, Inc.	$2.4M	20,479	+397	ADD
93	AMERICAN CENTURY COMPANIES INC	$2.3M	20,020	+1,719	ADD
94	Zurcher Kantonalbank (Zurich Cantonalbank)	$2.2M	19,174	+5,807	ADD
95	Dana Investment Advisors, Inc.	$2.2M	18,965	−199	TRIM
96	WORLDQUANT MILLENNIUM ADVISORS LLC	$2.1M	18,374	+18,374	NEW
97	Susquehanna Portfolio Strategies, LLC	$2.1M	18,372	+18,372	NEW
98	Edgestream Partners, L.P.	$2.1M	17,681	+10,586	ADD
99	MetLife Investment Management, LLC	$1.9M	16,406	+111	ADD
100	FIFTH THIRD BANCORP	$1.9M	16,045	+15,483	ADD
101	STOREBRAND ASSET MANAGEMENT AS	$1.8M	15,405	—	NO PRIOR
102	SUSQUEHANNA INTERNATIONAL GROUP, LLP	$1.8M	14,999	−8,802	TRIM
103	BARCLAYS PLC	$1.7M	14,456	−52,157	TRIM
104	SummitTX Capital, L.P.	$1.7M	14,335	+14,335	NEW
105	Vanguard Global Advisers, LLC	$1.6M	13,911	—	NO PRIOR
106	NOMURA ASSET MANAGEMENT INTERNATIONAL INC.	$1.6M	13,868	+13,868	NEW
107	LPL Financial LLC	$1.5M	13,059	+411	ADD
108	XTX Topco Ltd	$1.5M	12,878	+12,878	NEW
109	MUTUAL OF AMERICA CAPITAL MANAGEMENT LLC	$1.5M	12,780	−1,100	TRIM
110	SEI INVESTMENTS CO	$1.5M	12,769	−15,673	TRIM
111	Summit Trail Advisors, LLC	$1.5M	12,524	−3,037	TRIM
112	Polymer Capital Management (US) LLC	$1.5M	12,520	+6,020	ADD
113	Universal- Beteiligungs- und Servicegesellschaft mbH	$1.5M	12,479	+3,297	ADD
114	Creative Planning	$1.4M	11,961	+4,276	ADD
115	Mitsubishi UFJ Asset Management Co., Ltd.	$1.3M	11,262	+1,282	ADD
116	Arizona State Retirement System	$1.2M	10,580	−214	TRIM
117	YOUSIF CAPITAL MANAGEMENT, LLC	$1.2M	10,518	−537	TRIM
118	Schonfeld Strategic Advisors LLC	$1.2M	10,182	+4,170	ADD
119	Walnut Level Capital LLC	$1.2M	10,000	−1,404	TRIM
120	Vanguard Investments Australia, Ltd.	$1.2M	9,932	—	NO PRIOR
121	PUBLIC EMPLOYEES RETIREMENT SYSTEM OF OHIO	$1.1M	9,724	−332	TRIM
122	Inspire Investing, LLC	$1.1M	9,576	+5,172	ADD
123	Vanguard Personalized Indexing Management, LLC	$1.1M	9,463	−292	TRIM
124	KLP KAPITALFORVALTNING AS	$993K	8,500	+300	ADD
125	COMMONWEALTH OF PENNSYLVANIA PUBLIC SCHOOL EMPLS RETRMT SYS	$976K	8,356	+10	ADD
126	WINTON GROUP Ltd	$961K	8,229	+8,229	NEW
127	Aster Capital Management (DIFC) Ltd	$943K	9,428	+8,608	ADD
128	STATE OF MICHIGAN RETIREMENT SYSTEM	$935K	8,000	+100	ADD
129	TWIN FOCUS CAPITAL PARTNERS, LLC	$935K	8,000	+8,000	NEW
130	Total Wealth Planning & Management, Inc.	$900K	7,707	+4,752	ADD
131	Capital Group Investment Management Pte. Ltd.	$899K	7,693	+7,693	NEW
132	Eurizon Capital SGR S.p.A.	$878K	7,518	+7,518	NEW
133	NORTHWESTERN MUTUAL INVESTMENT MANAGEMENT COMPANY, LLC	$873K	7,472	+10	ADD
134	Dynamic Technology Lab Private Ltd	$859K	7,352	+7,352	NEW
135	GATEWAY INVESTMENT ADVISERS LLC	$835K	7,147	+7,147	NEW
136	First Eagle Investment Management, LLC	$832K	7,118	+7,065	ADD
137	OREGON PUBLIC EMPLOYEES RETIREMENT FUND	$802K	6,868	+200	ADD
138	Concentric Capital Strategies, LP	$761K	6,517	+6,517	NEW
139	Pictet Asset Management Holding SA	$708K	6,059	+34	ADD
140	MERCER GLOBAL ADVISORS INC /ADV	$668K	5,717	+1,794	ADD
141	Advisors Asset Management, Inc.	$660K	5,647	−400	TRIM
142	Storgate, LLC	$644K	5,510	+130	ADD
143	Unison Advisors LLC	$613K	5,247	+32	ADD
144	Caprock Group, LLC	$604K	5,171	+5,171	NEW
145	Pathstone Holdings, LLC	$579K	4,960	+311	ADD
146	Hartree Partners, LP	$502K	4,300	+4,300	NEW
147	GUGGENHEIM CAPITAL LLC	$481K	4,119	−55	TRIM
148	XPONANCE LLC	$466K	3,988	+887	ADD
149	CIBC Asset Management Inc	$465K	3,977	0	NO CHANGE
150	Cetera Investment Advisers	$458K	3,921	+767	ADD
151	Marnell Management LLC	$444K	3,802	−7,898	TRIM
152	Atria Investments, Inc	$442K	3,786	−286	TRIM
153	EVERGREEN CAPITAL MANAGEMENT LLC	$427K	3,651	+3,651	NEW
154	Sanctuary Advisors, LLC	$382K	3,272	−169	TRIM
155	Havemeyer Place LP	$380K	3,250	+3,250	NEW
156	TWINBEECH CAPITAL LP	$345K	2,950	+2,950	NEW
157	RAYMOND JAMES FINANCIAL INC	$342K	2,931	−190	TRIM
158	Odyssean, LLC	$339K	2,903	0	NO CHANGE
159	iSAM Funds (UK) Ltd	$331K	2,835	+7	ADD
160	WEALTH ENHANCEMENT ADVISORY SERVICES, LLC	$309K	2,588	+2,588	NEW
161	Archer Investment Corp	$291K	2,493	+2,493	NEW
162	VOYA INVESTMENT MANAGEMENT LLC	$285K	2,436	+2,436	NEW
163	SECURIAN ASSET MANAGEMENT, INC	$281K	2,403	0	NO CHANGE
164	MFA WEALTH ADVISORS, LLC	$278K	2,382	+2,382	NEW
165	DEUTSCHE BANK AG\	$277K	2,370	+1,286	ADD
166	HighTower Advisors, LLC	$269K	2,305	+2,305	NEW
167	Swiss Life Asset Management Ltd	$263K	2,253	+2,253	NEW
168	CWM, LLC	$263K	2,249	+1,903	ADD
169	PRUDENTIAL FINANCIAL INC	$260K	2,228	+2,228	NEW
170	BROWN ADVISORY INC	$260K	2,226	+2,226	NEW
171	CANADA PENSION PLAN INVESTMENT BOARD	$258K	2,210	−5,721	TRIM
172	CoreFirst Bank & Trust	$256K	2,195	−25	TRIM
173	US BANCORP \DE\	$254K	2,170	+160	ADD
174	Empowered Funds, LLC	$253K	2,162	+2,162	NEW
175	Sivia Capital Partners, LLC	$245K	2,099	+2,099	NEW
176	EAGLE GLOBAL ADVISORS LLC	$241K	2,066	+2,066	NEW
177	Callan Family Office, LLC	$236K	2,017	+2,017	NEW
178	Verition Fund Management LLC	$234K	2,000	−24,078	TRIM
179	Amundi	$233K	1,997	+1,997	NEW
180	Federation des caisses Desjardins du Quebec	$232K	1,990	−569	TRIM
181	Cercano Management LLC	$231K	1,978	+1,978	NEW
182	Maryland State Retirement & Pension System	$224K	1,915	+1,915	NEW
183	Greenland Capital Management LP	$212K	1,812	+1,812	NEW
184	Utah Retirement Systems	$210K	1,800	+1,800	NEW
185	Laird Norton Wetherby Trust Company, LLC	$205K	1,752	+1,752	NEW
186	Virtus Investment Advisers, LLC	$203K	1,736	−450	TRIM
187	OPPENHEIMER & CO INC	$203K	1,735	+1,735	NEW
188	Allworth Financial LP	$199K	1,701	+263	ADD
189	MAI Capital Management	$191K	1,631	+315	ADD
190	Kimelman & Baird, LLC	$175K	1,500	0	NO CHANGE
191	TD Waterhouse Canada Inc.	$160K	1,375	+1,335	ADD
192	Tower Research Capital LLC (TRC)	$158K	1,356	+592	ADD
193	Transamerica Financial Advisors, LLC	$152K	1,300	+495	ADD
194	SIGNATUREFD, LLC	$134K	1,148	+1,006	ADD
195	Sterling Capital Management LLC	$131K	1,122	−855	TRIM
196	PICKERING ENERGY PARTNERS LP	$117K	1,000	+1,000	NEW
197	Compagnie Lombard Odier SCmA	$100K	860	+860	NEW
198	Rockefeller Capital Management L.P.	$100K	857	−98	TRIM
199	NOMURA ASSET MANAGEMENT CO LTD	$78.3K	670	−226	TRIM
200	EXCHANGE TRADED CONCEPTS, LLC	$62.6K	536	+536	NEW
201	BNP Paribas Asset Management Holding S.A.	$62.5K	535	+197	ADD
202	Walleye Trading LLC	$60.0K	514	+514	NEW
203	Destiny Wealth Partners, LLC	$59.6K	510	+510	NEW
204	QUADRANT CAPITAL GROUP LLC	$44.6K	382	−65	TRIM
205	UMB Bank, n.a.	$36.4K	312	−81	TRIM
206	Deseret Mutual Benefit Administrators	$29.0K	248	+115	ADD
207	Arax Advisory Partners	$27.1K	232	+212	ADD
208	Smartleaf Asset Management LLC	$24.7K	213	+112	ADD
209	OSAIC HOLDINGS, INC.	$22.2K	190	−90	TRIM
210	NISA INVESTMENT ADVISORS, LLC	$21.6K	185	+135	ADD
211	NATIONAL BANK OF CANADA /FI/	$21.3K	182	−93	TRIM
212	Spire Wealth Management	$20.1K	172	−134	TRIM
213	CVA Family Office, LLC	$9.8K	84	+84	NEW
214	Parkside Financial Bank & Trust	$7.9K	68	−200	TRIM
215	Rakuten Securities, Inc.	$7.5K	64	+58	ADD
216	Pinnacle Wealth Planning Services, Inc.	$6.8K	58	0	NO CHANGE
217	Larson Financial Group LLC	$6.7K	57	+34	ADD
218	Sachetta, LLC	$6.3K	54	0	NO CHANGE
219	ASSETMARK, INC	$5.1K	44	+5	ADD
220	Private Wealth Management Group, LLC	$4.2K	36	0	NO CHANGE
221	Purpose Unlimited Inc.	$4.0K	34	+34	NEW
222	FARMERS & MERCHANTS INVESTMENTS INC	$3.5K	30	0	NO CHANGE
223	JFS WEALTH ADVISORS, LLC	$3.5K	30	+16	ADD
224	Keating Financial Advisory Services, Inc.	$3.5K	30	+29	ADD
225	True Wealth Design, LLC	$3.2K	27	+9	ADD
226	Peterson Wealth Services	$2.7K	23	0	NO CHANGE
227	SJS Investment Consulting Inc.	$2.6K	22	+22	NEW
228	Duquesne Family Office LLC	$2.5K	21,194	+21,194	NEW
229	Manchester Capital Management LLC	$2.5K	21	0	NO CHANGE
230	South Dakota Investment Council	$2.4K	20,235	0	NO CHANGE
231	CANADA LIFE ASSURANCE Co	$2.3K	20,005	+674	ADD
232	KBC Group NV	$2.3K	19,432	−2,790	TRIM
233	SouthState Bank Corp	$2.1K	18	+10	ADD
234	Clearstead Advisors, LLC	$2.1K	18	−91	TRIM
235	Treasurer of the State of North Carolina	$1.7K	14,304	+306	ADD
236	TEACHERS RETIREMENT SYSTEM OF THE STATE OF KENTUCKY	$1.5K	12,845	+12,845	NEW
237	Rialto Wealth Management, LLC	$1.4K	12	+5	ADD
238	Steward Partners Investment Advisory, LLC	$1.2K	10	−14	TRIM
239	Virtu Financial LLC	$1.1K	9,532	+9,532	NEW
240	DiNuzzo Private Wealth, Inc.	$1.1K	9	+7	ADD
241	PICTON MAHONEY ASSET MANAGEMENT	$935	8	0	NO CHANGE
242	THRIVENT FINANCIAL FOR LUTHERANS	$878	7,514	+4	ADD
243	ELEVATION WEALTH PARTNERS, LLC	$818	7	+7	NEW
244	American Capital Advisory, LLC	$818	7	0	NO CHANGE
245	MV CAPITAL MANAGEMENT, INC.	$701	6	+1	ADD
246	Vermillion Wealth Management, Inc.	$701	6	+6	NEW
247	HFM Investment Advisors, LLC	$701	6	+5	ADD
248	GSA CAPITAL PARTNERS LLP	$596	5,106	+5,106	NEW
249	SWAN Capital LLC	$584	5	0	NO CHANGE
250	NEW YORK STATE TEACHERS RETIREMENT SYSTEM	$484	4,143	−1,082	TRIM
251	Cromwell Holdings LLC	$467	4	0	NO CHANGE
252	Arlington Trust Co LLC	$467	4	+4	NEW
253	State of Alaska, Department of Revenue	$391	3,354	+45	ADD
254	Investors Portfolio Services LLC	$376	4	+4	NEW
255	Claret Asset Management Corp	$351	3,007	0	NO CHANGE
256	TopTier Wealth Management, LLC	$350	3	+3	NEW
257	NORTHWESTERN MUTUAL WEALTH MANAGEMENT CO	$234	2	+2	NEW
258	SBI Securities Co., Ltd.	$234	2	+1	ADD
259	Activest Wealth Management	$234	2	+2	NEW
260	Valued Wealth Advisors LLC	$121	1	0	NO CHANGE
261	3 FACTOR INDEXING, LLC	$117	1	—	NO PRIOR
262	Penserra Capital Management LLC	$1	9	0	NO CHANGE
263	Avion Wealth	$1	14	0	NO CHANGE
264	VANGUARD GROUP INC	—	—	−3,917,329	EXIT
265	HARBOUR INVESTMENTS, INC.	—	—	−37	EXIT
266	COMERICA BANK	—	—	−28,483	EXIT
267	WEDGE CAPITAL MANAGEMENT L L P/NC	—	—	−42,841	EXIT
268	WEXFORD CAPITAL LP	—	—	−1,344	EXIT
269	CI INVESTMENTS INC.	—	—	−4,128	EXIT
270	TWO SIGMA INVESTMENTS, LP	—	—	−198,379	EXIT
271	LAZARD ASSET MANAGEMENT LLC	—	—	−74,428	EXIT
272	DIAMOND HILL CAPITAL MANAGEMENT INC	—	—	−190,180	EXIT
273	ALPINE WOODS CAPITAL INVESTORS, LLC	—	—	−8,989	EXIT
274	NATIXIS	—	—	−87,872	EXIT
275	LUMINUS MANAGEMENT LLC	—	—	−35,189	EXIT
276	CIBC Private Wealth Group LLC	—	—	−191	EXIT
277	Weiss Asset Management LP	—	—	−9,928	EXIT
278	NORGES BANK	—	—	−181,328	EXIT
279	Hudson Bay Capital Management LP	—	—	−30,443	EXIT
280	Alyeska Investment Group, L.P.	—	—	−103,041	EXIT
281	DekaBank Deutsche Girozentrale	—	—	−3,540	EXIT
282	Alberta Investment Management Corp	—	—	−19,700	EXIT
283	TWO SIGMA ADVISERS, LP	—	—	−144,700	EXIT
284	Daiwa Securities Group Inc.	—	—	−4,108	EXIT
285	SIMPLEX TRADING, LLC	—	—	−1,981	EXIT
286	Brevan Howard Capital Management LP	—	—	−9,468	EXIT
287	Assenagon Asset Management S.A.	—	—	−3,790	EXIT
288	VOLORIDGE INVESTMENT MANAGEMENT, LLC	—	—	−348,953	EXIT
289	HITE Hedge Asset Management LLC	—	—	−52,153	EXIT
290	Select Equity Group, L.P.	—	—	−74,997	EXIT
291	ANTIPODES PARTNERS Ltd	—	—	−416,520	EXIT
292	Numerai GP LLC	—	—	−5,792	EXIT
293	DV Trading LLC	—	—	−300	EXIT
294	ExodusPoint Capital Management, LP	—	—	−154,391	EXIT
295	Global Retirement Partners, LLC	—	—	−21	EXIT
296	Oak Thistle LLC	—	—	−7,170	EXIT
297	Lloyd Advisory Services, LLC.	—	—	−2,445	EXIT
298	Aventail Capital Group, LP	—	—	−27,764	EXIT
299	State of Wyoming	—	—	−7,824	EXIT
300	Kestra Advisory Services, LLC	—	—	−1,138	EXIT
301	Blue Trust, Inc.	—	—	−186	EXIT
302	AlphaQuest LLC	—	—	−5,192	EXIT
303	SageView Advisory Group, LLC	—	—	−40	EXIT
304	Dunhill Financial, LLC	—	—	−1	EXIT
305	Quarry LP	—	—	−426	EXIT
306	Jain Global LLC	—	—	−62,043	EXIT
307	CAXTON ASSOCIATES LLP	—	—	−4,615	EXIT
308	OPTIMA CAPITAL LLC	—	—	−3	EXIT
309	VARCOV Co.	—	—	−35,597	EXIT

Newest filing in this build: 2026-07-31. Per-row filing dates are on each receipt.

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

Adding: 2 Gotham Asset Management, Duquesne Family Office $4.0M held
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
Date	Who	Change	Size
2026-05-15	Gotham Asset Management 13F	ADD	+25,365 sh
2026-05-15	Duquesne Family Office 13F	NEW	+21,194 sh
2026-05-14	Caxton Associates 13F	EXIT	−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

4 members of Congress disclosed WLK — the congressional view ↗

A 13F is a quarterly, long-only snapshot filed up to 45 days late — not current holdings. what a 13F covers ↗

13F reports cover LONG positions in Section 13(f) securities (US exchange-traded equities plus reportable options, warrants, certain convertibles) held by managers with at least $100M in such securities — so managers below that threshold are absent entirely. No short positions, no cash, no non-13(f) assets — not a full portfolio, and not a census of institutional ownership.

Positions are quarter-end snapshots filed up to 45 days late — not current holdings. A position may have been changed or closed before you ever see it, and is older still by however long ago that quarter ended.

Values are the manager's stated market value at quarter-end in era-dependent units (whole dollars for form versions effective 2023-01-03 onward, thousands before), normalized here to whole dollars with unit_basis carried on every record.

Affiliated managers may report the same position (otherManager), so one position can appear under more than one filer.

Positions under confidential treatment may be omitted until a later amendment discloses them.

These are disclosures, not investment advice (ARCHITECTURE.md §5.2 / M2-CONTRACT §5).