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WLK · Westlake Corp · Shareholders & Ownership

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$62.69 +0.40 (+0.64%) At close · Oct 20
Market Cap
$7.98B
Shares
127.80M
Volume · Oct 20 600.01K Avg daily vol (3M) 931.45K

Every disclosed holder of WLK in one list: 13F institutions, Schedule 13D and 13G filers, insiders (Forms 3, 4 and 5) and registered funds, each from its own latest filing. Holders nest by CIK and SEC reporting links, never by name, and each is summed once.

Who Owns WLK

13F quarter Sep 30, 2026, combined view: filers that have not filed yet carry their Jun 30, 2026 positions

No chart: the summed disclosures exceed shares outstanding, so they are not parts of one whole.

Holder group Shares % Out
Institutional (13F) 39,668,465 31.04%
Insiders (Forms 3, 4, 5) 1,041,263 0.81%
13D/G-only blocks 93,405,554 73.09%
Remaining 6,318,734 -4.94%
Registered funds (N-PORT, not summed) 15,551,518 12.17%

Shares outstanding: 127,796,548, the issuer's latest cover-page count restated onto today's split basis.

Remaining is negative: the summed disclosures exceed shares outstanding, as when filings are dated at different times or holders that do not disclose their links count the same shares. It is flagged, not clipped.

13D/G-only counts each filer's latest 13D or 13G that no 13F report of the listing contains, that names no 13F filer and that no counted insider files. Funds are never summed: their shares sit inside their advisers' 13F reports.

Holders of WLK

# Holder Shares
1
TTWFGP LLC
13G CIK 1299601 · Unknown · Dec 31, 2023
Rule 13d-1(d), exempt investor
93,405,554
2
BlackRock, Inc.
13F CIK 2012383 · Holding company · Jun 30, 2026
carried, not yet filed for the newest quarter
3,294,162
2.1
iShares Core S&P Mid-Cap ETF
Fund S000004307 · Registered fund · Jun 30, 2026
iShares Trust, not summed
1,138,906
2.2
iShares S&P Mid-Cap 400 Value ETF
Fund S000004309 · Registered fund · Jun 30, 2026
iShares Trust, not summed
166,909
2.3
iShares Russell Mid-Cap ETF
Fund S000004338 · Registered fund · Jun 30, 2026
iShares Trust, not summed
135,291
2.4
iShares Russell 1000 Value ETF
Fund S000004345 · Registered fund · Jun 30, 2026
iShares Trust, not summed
73,714
2.5
iShares U.S. Infrastructure ETF
Fund S000061314 · Registered fund · Jun 30, 2026
iShares Trust, not summed
53,970
3
Capital World Investors
13F CIK 1422849 · Investment adviser · Jun 30, 2026
carried, not yet filed for the newest quarter
2,842,348
4
PRICE T ROWE ASSOCIATES INC /MD/
13F CIK 80255 · Registered investment adviser · Jun 30, 2026
carried, not yet filed for the newest quarter
2,206,676
4.1
T. Rowe Price Mid-Cap Value Fund, Inc.
Fund S000002103 · Registered fund · Jun 30, 2026
T. ROWE PRICE MID-CAP VALUE FUND, INC., not summed
1,139,623
4.2
T. Rowe Price Small-Mid Cap ETF
Fund S000079837 · Registered fund · Jun 30, 2026
T. Rowe Price Exchange-Traded Funds, Inc., not summed
56,094
4.3
T. Rowe Price Extended Equity Market Index Fund
Fund S000002090 · Registered fund · Jun 30, 2026
T. ROWE PRICE INDEX TRUST, INC., not summed
5,653
4.4
T. Rowe Price Mid-Cap Index Fund
Fund S000051326 · Registered fund · Jun 30, 2026
T. ROWE PRICE INDEX TRUST, INC., not summed
2,895
5
Orbis Allan Gray Ltd
13F CIK 1663865 · Unknown · Jun 30, 2026
carried, not yet filed for the newest quarter
2,084,364
6
DIMENSIONAL FUND ADVISORS LP
13F CIK 354204 · Registered investment adviser · Jun 30, 2026
carried, not yet filed for the newest quarter
2,051,554
6.1
U.S. SMALL CAP VALUE PORTFOLIO
Fund S000000987 · Registered fund · Jul 31, 2026
DFA INVESTMENT DIMENSIONS GROUP INC, not summed
370,642
6.2
U.S. Targeted Value Portfolio
Fund S000000970 · Registered fund · Jul 31, 2026
DFA INVESTMENT DIMENSIONS GROUP INC, not summed
307,588
6.3
Dimensional U.S. Targeted Value ETF
Fund S000070901 · Registered fund · Jul 31, 2026
Dimensional ETF Trust, not summed
280,688
6.4
Dimensional US Small Cap Value ETF
Fund S000075151 · Registered fund · Jul 31, 2026
Dimensional ETF Trust, not summed
265,555
6.5
Dimensional U.S. Core Equity 2 ETF
Fund S000070903 · Registered fund · Jul 31, 2026
Dimensional ETF Trust, not summed
154,588
7
VANGUARD PORTFOLIO MANAGEMENT LLC
13F CIK 2100121 · Registered investment adviser · Jun 30, 2026
carried, not yet filed for the newest quarter
1,752,627
8
BRANDES INVESTMENT PARTNERS, LP
13F CIK 1015079 · Registered investment adviser · Jun 30, 2026
carried, not yet filed for the newest quarter
1,572,939
8.1
Brandes U.S. Value ETF
Fund S000081644 · Registered fund · Jun 30, 2026
2023 ETF Series Trust, not summed
45,776
8.2
Brandes Global Equity Fund
Fund S000084887 · Registered fund · Jun 30, 2026
Datum One Series Trust, not summed
12,756
9
AQR CAPITAL MANAGEMENT LLC
13F CIK 1167557 · Registered investment adviser · Jun 30, 2026
carried, not yet filed for the newest quarter
1,570,453
9.1
AQR Long-Short Equity Fund
Fund S000041116 · Registered fund · Jun 30, 2026
AQR Funds, not summed
73,162
9.2
AQR Managed Futures Strategy HV Fund
Fund S000041117 · Registered fund · Jun 30, 2026
AQR Funds, not summed
50,861
9.3
AQR Trend Total Return Fund
Fund S000074759 · Registered fund · Jun 30, 2026
AQR Funds, not summed
7,153
9.4
AQR MS Fusion HV Fund
Fund S000093174 · Registered fund · Jun 30, 2026
AQR Funds, not summed
2,087
9.5
AQR CVX Fusion Fund
Fund S000093172 · Registered fund · Jun 30, 2026
AQR Funds, not summed
699
10
VANGUARD CAPITAL MANAGEMENT LLC
13F CIK 2100119 · Registered investment adviser · Jun 30, 2026
carried, not yet filed for the newest quarter
1,464,223
11
STATE STREET CORP
13F CIK 93751 · Bank · Jun 30, 2026
carried, not yet filed for the newest quarter
1,453,407
11.1
State Street(R) SPDR(R) S&P(R) Dividend ETF
Fund S000006981 · Registered fund · Jun 30, 2026
SPDR SERIES TRUST, not summed
346,456
11.2
State Street(R) SPDR(R) Portfolio S&P 400(TM) Mid Cap ETF
Fund S000006986 · Registered fund · Jun 30, 2026
SPDR SERIES TRUST, not summed
168,618
11.3
State Street(R) SPDR(R) S & P 400(TM) Mid Cap Value ETF
Fund S000006988 · Registered fund · Jun 30, 2026
SPDR SERIES TRUST, not summed
51,031
11.4
STATE STREET SMALL/MID CAP EQUITY INDEX PORTFOLIO
Fund S000050332 · Registered fund · Jun 30, 2026
STATE STREET INSTITUTIONAL INVESTMENT TRUST, not summed
11,596
11.5
State Street(R) SPDR(R) Portfolio S&P 1500(R) Composite Stock Market ETF
Fund S000006973 · Registered fund · Jun 30, 2026
SPDR SERIES TRUST, not summed
6,726
12
GOLDMAN SACHS GROUP INC
13F CIK 886982 · Holding company · Jun 30, 2026
carried, not yet filed for the newest quarter
1,280,873
12.1
Goldman Sachs MarketBeta U.S. 1000 Equity ETF
Fund S000075322 · Registered fund · May 31, 2026
Goldman Sachs ETF Trust II, not summed
1,123
12.2
Goldman Sachs MarketBeta(R) Russell 1000 Value Equity ETF
Fund S000083006 · Registered fund · May 31, 2026
Goldman Sachs ETF Trust, not summed
403
12.3
Goldman Sachs Absolute Return Tracker Fund
Fund S000020314 · Registered fund · Jun 30, 2026
GOLDMAN SACHS TRUST, not summed
102
13
CITADEL ADVISORS LLC
13F CIK 1423053 · Registered investment adviser · Jun 30, 2026
carried, not yet filed for the newest quarter
1,054,868
14
MIRAE ASSET GLOBAL ETFS HOLDINGS Ltd.
13F CIK 1705339 · Unknown · Jun 30, 2026
carried, not yet filed for the newest quarter
1,023,403
14.1
Global X U.S. Infrastructure Development ETF
Fund S000056509 · Registered fund · May 31, 2026
GLOBAL X FUNDS, not summed
939,919
15
VANGUARD TOTAL STOCK MARKET INDEX FUND
Fund S000002848 · Registered fund · Jun 30, 2026
VANGUARD INDEX FUNDS, not summed
1,018,691
16
Income Fund of America
Fund S000008814 · Registered fund · Jul 31, 2026
Income Fund of America, not summed
975,000
17
UBS AM, a distinct business unit of UBS ASSET MANAGEMENT AMERICAS LLC
13F CIK 861177 · Registered investment adviser · Jun 30, 2026
carried, not yet filed for the newest quarter
817,207
17.1
UBS U.S. Allocation Fund
Fund S000002487 · Registered fund · May 31, 2026
UBS INVESTMENT TRUST, not summed
5,261
17.2
UBS GLOBAL ALLOCATION FUND
Fund S000002979 · Registered fund · Jun 30, 2026
UBS FUNDS, not summed
1,765
18
VANGUARD SMALL-CAP INDEX FUND
Fund S000002845 · Registered fund · Jun 30, 2026
VANGUARD INDEX FUNDS, not summed
732,914
19
GEODE CAPITAL MANAGEMENT, LLC
13F CIK 1214717 · Registered investment adviser · Jun 30, 2026
carried, not yet filed for the newest quarter
718,597
20
JACOBS LEVY EQUITY MANAGEMENT, INC
13F CIK 884414 · Registered investment adviser · Jun 30, 2026
carried, not yet filed for the newest quarter
709,355
21
Chao Albert
Insider CIK 1299403 · Aug 11, 2026
Director, President & CEO, 10% Owner, issuer-wide
642,880
22
Balyasny Asset Management L.P.
13F CIK 1218710 · Registered investment adviser · Jun 30, 2026
carried, not yet filed for the newest quarter
625,859
23
VANGUARD SMALL-CAP VALUE INDEX FUND
Fund S000002847 · Registered fund · Jun 30, 2026
VANGUARD INDEX FUNDS, not summed
465,335
24
Woodline Partners LP
13F CIK 1784547 · Registered investment adviser · Jun 30, 2026
carried, not yet filed for the newest quarter
451,986
25
Nuveen, LLC
13F CIK 1871926 · Unknown · Jun 30, 2026
carried, not yet filed for the newest quarter
446,479
25.1
Nuveen Mid Cap Value Fund
Fund S000005385 · Registered fund · Jul 31, 2026
TIAA-CREF Funds, not summed
232,798
25.2
College Retirement Equities Fund - Total Global Stock Account
Fund S000005080 · Registered fund · Jun 30, 2026
College Retirement Equities Fund, not summed
67,077
25.3
Nuveen Mid Cap Value Opportunities Fund
Fund S000005556 · Registered fund · Jul 31, 2026
Nuveen Investment Funds, Inc., not summed
50,566
25.4
Nuveen Equity Index Fund
Fund S000005360 · Registered fund · Jul 31, 2026
TIAA-CREF Funds, not summed
24,961
25.5
Nuveen Small/Mid Cap Value Fund
Fund S000014609 · Registered fund · Jun 30, 2026
Nuveen Investment Trust, not summed
21,244
26
MORGAN STANLEY
13F CIK 895421 · Holding company · Jun 30, 2026
carried, not yet filed for the newest quarter
437,571
26.1
E*TRADE No Fee Total Market Index Fund
Fund S000090722 · Registered fund · Jul 31, 2026
E Trade Trust, not summed
33
27
UBS Group AG
13F CIK 1610520 · Bank · Jun 30, 2026
carried, not yet filed for the newest quarter
431,633
28
VANGUARD EXTENDED MARKET INDEX FUND
Fund S000002841 · Registered fund · Jun 30, 2026
VANGUARD INDEX FUNDS, not summed
382,398
29
SCHRODER INVESTMENT MANAGEMENT GROUP
13F CIK 1086619 · Registered investment adviser · Jun 30, 2026
carried, not yet filed for the newest quarter
375,889
30
MILLENNIUM MANAGEMENT LLC
13F CIK 1273087 · Registered investment adviser · Jun 30, 2026
carried, not yet filed for the newest quarter
366,074
31
FMR LLC
13F CIK 315066 · Holding company · Jun 30, 2026
carried, not yet filed for the newest quarter
361,243
31.1
Fidelity Extended Market Index Fund
Fund S000006021 · Registered fund · May 31, 2026
Fidelity Concord Street Trust, not summed
172,677
31.2
Fidelity Mid Cap Index Fund
Fund S000033637 · Registered fund · Jul 31, 2026
Fidelity Salem Street Trust, not summed
124,828
31.3
Fidelity Puritan Fund
Fund S000007153 · Registered fund · May 31, 2026
Fidelity Puritan Trust, not summed
121,900
31.4
Fidelity SAI Small-Mid Cap Momentum Index Fund
Fund S000050321 · Registered fund · Jul 31, 2026
Fidelity Salem Street Trust, not summed
101,891
31.5
Fidelity Advisor Stock Selector Mid Cap Fund
Fund S000005114 · Registered fund · May 31, 2026
Fidelity Advisor Series I, not summed
95,200
32
ExodusPoint Capital Management, LP
13F CIK 1736225 · Registered investment adviser · Jun 30, 2026
carried, not yet filed for the newest quarter
327,195
33
Qube Research & Technologies Ltd
13F CIK 1729829 · Exempt reporting adviser · Jun 30, 2026
carried, not yet filed for the newest quarter
321,718
34
CHARLES SCHWAB INVESTMENT MANAGEMENT INC
13F CIK 884546 · Registered investment adviser · Jun 30, 2026
carried, not yet filed for the newest quarter
318,823
34.1
Schwab U.S. Mid-Cap ETF
Fund S000026635 · Registered fund · May 31, 2026
SCHWAB STRATEGIC TRUST, not summed
90,310
34.2
Schwab Fundamental U.S. Large Company ETF
Fund S000040877 · Registered fund · May 31, 2026
SCHWAB STRATEGIC TRUST, not summed
59,341
34.3
Schwab U.S. Large-Cap ETF
Fund S000026632 · Registered fund · May 31, 2026
SCHWAB STRATEGIC TRUST, not summed
33,988
34.4
Schwab Fundamental U.S. Large Company Index Fund
Fund S000016766 · Registered fund · Jul 31, 2026
SCHWAB CAPITAL TRUST, not summed
30,577
34.5
Schwab U.S. Broad Market ETF
Fund S000026631 · Registered fund · May 31, 2026
SCHWAB STRATEGIC TRUST, not summed
20,502
35
Erste Asset Management GmbH
13F CIK 2024532 · Non-US institution · Jun 30, 2026
carried, not yet filed for the newest quarter
305,000
36
VAN LANSCHOT KEMPEN INVESTMENT MANAGEMENT N.V.
13F CIK 1367401 · Non-US institution · Jun 30, 2026
carried, not yet filed for the newest quarter
268,434
37
Jupiter Topco LLC
13F CIK 2146052 · Unknown · Jun 30, 2026
carried, not yet filed for the newest quarter
267,748
37.1
Janus Henderson Mid Cap Value Fund
Fund S000010471 · Registered fund · Jun 30, 2026
Janus Investment Fund, not summed
229,878
37.2
Janus Henderson VIT Mid Cap Value Portfolio
Fund S000010397 · Registered fund · Jun 30, 2026
Janus Aspen Series, not summed
14,120
38
NORTHERN TRUST CORP
13F CIK 73124 · Bank · Jun 30, 2026
carried, not yet filed for the newest quarter
262,926
38.1
Mid Cap Index Fund
Fund S000001273 · Registered fund · Jun 30, 2026
Northern Funds, not summed
21,675
38.2
FlexShares Morningstar US Market Factor Tilt Index Fund
Fund S000033312 · Registered fund · Jul 31, 2026
FlexShares Trust, not summed
2,370
39
State Street SPDR S&P MidCap 400SM ETF Trust
Fund · Registered fund · Jun 30, 2026
SPDR S&P MIDCAP 400 ETF TRUST, not summed
256,298
39.1
SPROTT FOCUS TRUST INC.
Fund · Registered fund · Jun 30, 2026
SPROTT FOCUS TRUST INC., not summed
160,000
39.2
Nuveen S&P 500 Dynamic Overwrite Fund
Fund · Registered fund · Jun 30, 2026
Nuveen S&P 500 Dynamic Overwrite Fund, not summed
11,812
40
New Perspective Fund
Fund S000009613 · Registered fund · Jun 30, 2026
New Perspective Fund, not summed
241,526
41
ROBOTTI ROBERT
13F CIK 1105838 · Holding company · Jun 30, 2026
carried, not yet filed for the newest quarter
235,379
42
BANK OF AMERICA CORP /DE/
13F CIK 70858 · Bank · Jun 30, 2026
carried, not yet filed for the newest quarter
232,213
43
Susquehanna Portfolio Strategies, LLC
13F CIK 1996449 · Unknown · Jun 30, 2026
carried, not yet filed for the newest quarter
230,396
44
ProShare Advisors LLC
13F CIK 1357955 · Registered investment adviser · Jun 30, 2026
carried, not yet filed for the newest quarter
228,319
44.1
ProShares S&P MidCap 400 Dividend Aristocrats ETF
Fund S000047884 · Registered fund · May 31, 2026
ProShares Trust, not summed
227,830
44.2
ProShares Ultra MidCap400
Fund S000006825 · Registered fund · May 31, 2026
ProShares Trust, not summed
1,153
44.3
ProShares UltraPro MidCap400
Fund S000024920 · Registered fund · May 31, 2026
ProShares Trust, not summed
161
45
NORGES BANK
13F CIK 1374170 · Non-US institution · Jun 30, 2026
carried, not yet filed for the newest quarter
214,101
46
Jump Financial, LLC
13F CIK 1831577 · Unknown · Jun 30, 2026
carried, not yet filed for the newest quarter
209,861
47
VANGUARD FIDUCIARY TRUST CO
13F CIK 933478 · Unknown · Jun 30, 2026
carried, not yet filed for the newest quarter
209,650
48
D. E. Shaw & Co., Inc.
13F CIK 1009207 · Unknown · Jun 30, 2026
carried, not yet filed for the newest quarter
200,534
49
Russell Investments Group, Ltd.
13F CIK 1692234 · Unknown · Jun 30, 2026
carried, not yet filed for the newest quarter
194,362
49.1
U.S. Strategic Equity Fund
Fund S000037466 · Registered fund · Jul 31, 2026
RUSSELL INVESTMENT CO, not summed
36,759
49.2
U.S. Strategic Equity Fund
Fund S000006863 · Registered fund · Jun 30, 2026
RUSSELL INVESTMENT FUNDS, not summed
7,958
49.3
U.S. Small Cap Equity Fund
Fund S000001586 · Registered fund · Jul 31, 2026
RUSSELL INVESTMENT CO, not summed
1,113
49.4
U.S. Small Cap Equity Fund
Fund S000006864 · Registered fund · Jun 30, 2026
RUSSELL INVESTMENT FUNDS, not summed
216
50
Invesco Ltd.
13F CIK 914208 · Investment adviser · Jun 30, 2026
carried, not yet filed for the newest quarter
190,951
50.1
Invesco S&P MidCap 400 Revenue ETF
Fund S000064595 · Registered fund · May 31, 2026
Invesco Exchange-Traded Fund Trust II, not summed
49,282
50.2
Invesco S&P Midcap 400 Pure Value ETF
Fund S000060796 · Registered fund · Jul 31, 2026
Invesco Exchange-Traded Fund Trust, not summed
42,496
50.3
Invesco RAFI US 1000 ETF
Fund S000011995 · Registered fund · Jul 31, 2026
Invesco Exchange-Traded Fund Trust, not summed
19,107
50.4
Invesco Russell 1000 Equal Weight ETF
Fund S000047524 · Registered fund · May 31, 2026
Invesco Exchange-Traded Fund Trust II, not summed
15,802
50.5
Invesco Dividend AchieversTM ETF
Fund S000003037 · Registered fund · Jul 31, 2026
Invesco Exchange-Traded Fund Trust, not summed
3,646

68 more nested rows are not shown here; Every filing lists them all.

Shares are restated onto today's split basis. Change compares each row with the same holder's previous filing in the same source; a dash means there is none to compare. Nested 13D/G, insider and fund rows are not summed, since a 13F report already holds them.

Showing 1–50 of 511 holders

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Key facts CIK 1262823 CUSIP 960413102 13F (30d) 41 filings 34 filers Visit website Investor relations