WLK · Westlake Corp · Shareholders & Ownership
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 positionsNo 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 | As of | Notes |
|---|---|---|---|---|
| 1 |
|
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 |
|
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 |
|
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 |
|
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 |
|
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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