HOUSTON, TX
WESTLAKE CORPWLK— Latest position per institution from SEC 13F filings
15
Institutional holders
40.17M
Total shares held
4.36B
Estimated value
2.01M
Avg. position size
ORBIS ALLAN GRAY LTD
CIK 1663865
Shares
5.29M
Value
618.39M
Filed
Mar 31, 2026
CAPITAL WORLD INVESTORS
CIK 1422849
Shares
4.21M
Value
491.93M
Filed
Mar 31, 2026
VANGUARD GROUP INC
CIK 102909
Shares
3.92M
Value
289.65M
Filed
Dec 31, 2025
BLACKROCK FINANCE, INC.
CIK 1364742
Shares
3.41M
Value
493.55M
Filed
Jun 30, 2024
BLACKROCK, INC.
CIK 2012383
Shares
3.08M
Value
359.70M
Filed
Mar 31, 2026
PRICE T ROWE ASSOCIATES INC /MD/
CIK 80255
Shares
2.41M
Value
281.24K
Filed
Mar 31, 2026
BRANDES INVESTMENT PARTNERS, LP
CIK 1015079
Shares
1.84M
Value
215.26M
Filed
Mar 31, 2026
WELLINGTON MANAGEMENT GROUP LLP
CIK 902219
Shares
1.79M
Value
209.52M
Filed
Mar 31, 2026
VANGUARD PORTFOLIO MANAGEMENT LLC
CIK 2100121
Shares
1.77M
Value
206.75M
Filed
Mar 31, 2026
DIMENSIONAL FUND ADVISORS LP
CIK 354204
Shares
1.47M
Value
171.26M
Filed
Mar 31, 2026
VANGUARD CAPITAL MANAGEMENT LLC
CIK 2100119
Shares
1.46M
Value
170.04M
Filed
Mar 31, 2026
GOLDMAN SACHS GROUP INC
CIK 886982
Shares
1.39M
Value
162.77M
Filed
Mar 31, 2026
STATE STREET CORP
CIK 93751
Shares
1.38M
Value
161.27M
Filed
Mar 31, 2026
FMR LLC
CIK 315066
Shares
1.31M
Value
153.32M
Filed
Mar 31, 2026
NUVEEN ASSET MANAGEMENT, LLC
CIK 1521019
Shares
983.09K
Value
112.71M
Filed
Dec 31, 2024
UBS AM, A DISTINCT BUSINESS UNIT OF UBS ASSET MANAGEMENT AMERICAS LLC
CIK 861177
Shares
981.40K
Value
114.65M
Filed
Mar 31, 2026
MIRAE ASSET GLOBAL ETFS HOLDINGS LTD.
CIK 1705339
Shares
943.98K
Value
110.27M
Filed
Mar 31, 2026
SOROBAN CAPITAL PARTNERS LP
CIK 1517857
Shares
871.48K
Value
121.97M
Filed
Dec 31, 2023
CITADEL ADVISORS LLC
CIK 1423053
Shares
847.19K
Value
98.97M
Filed
Mar 31, 2026
UBS GROUP AG
CIK 1610520
Shares
811.27K
Value
94.77M
Filed
Mar 31, 2026
| # | Institution | CIK | Shares | Est. Value | Period |
|---|---|---|---|---|---|
| 1 | ORBIS ALLAN GRAY LTD | 1663865 | 5.29M | 618.39M | Mar 31, 2026 |
| 2 | CAPITAL WORLD INVESTORS | 1422849 | 4.21M | 491.93M | Mar 31, 2026 |
| 3 | VANGUARD GROUP INC | 102909 | 3.92M | 289.65M | Dec 31, 2025 |
| 4 | BLACKROCK FINANCE, INC. | 1364742 | 3.41M | 493.55M | Jun 30, 2024 |
| 5 | BLACKROCK, INC. | 2012383 | 3.08M | 359.70M | Mar 31, 2026 |
| 6 | PRICE T ROWE ASSOCIATES INC /MD/ | 80255 | 2.41M | 281.24K | Mar 31, 2026 |
| 7 | BRANDES INVESTMENT PARTNERS, LP | 1015079 | 1.84M | 215.26M | Mar 31, 2026 |
| 8 | WELLINGTON MANAGEMENT GROUP LLP | 902219 | 1.79M | 209.52M | Mar 31, 2026 |
| 9 | VANGUARD PORTFOLIO MANAGEMENT LLC | 2100121 | 1.77M | 206.75M | Mar 31, 2026 |
| 10 | DIMENSIONAL FUND ADVISORS LP | 354204 | 1.47M | 171.26M | Mar 31, 2026 |
| 11 | VANGUARD CAPITAL MANAGEMENT LLC | 2100119 | 1.46M | 170.04M | Mar 31, 2026 |
| 12 | GOLDMAN SACHS GROUP INC | 886982 | 1.39M | 162.77M | Mar 31, 2026 |
| 13 | STATE STREET CORP | 93751 | 1.38M | 161.27M | Mar 31, 2026 |
| 14 | FMR LLC | 315066 | 1.31M | 153.32M | Mar 31, 2026 |
| 15 | NUVEEN ASSET MANAGEMENT, LLC | 1521019 | 983.09K | 112.71M | Dec 31, 2024 |
| 16 | UBS AM, A DISTINCT BUSINESS UNIT OF UBS ASSET MANAGEMENT AMERICAS LLC | 861177 | 981.40K | 114.65M | Mar 31, 2026 |
| 17 | MIRAE ASSET GLOBAL ETFS HOLDINGS LTD. | 1705339 | 943.98K | 110.27M | Mar 31, 2026 |
| 18 | SOROBAN CAPITAL PARTNERS LP | 1517857 | 871.48K | 121.97M | Dec 31, 2023 |
| 19 | CITADEL ADVISORS LLC | 1423053 | 847.19K | 98.97M | Mar 31, 2026 |
| 20 | UBS GROUP AG | 1610520 | 811.27K | 94.77M | Mar 31, 2026 |
Data sourced from SEC Form 13F institutional holdings reports. Positions reflect the most recent filing per institution.