HOUSTON, TX
WESTLAKE CORPWLK— Latest position per institution from SEC 13F filings
15
Institutional holders
37.17M
Total shares held
2.74B
Estimated value
1.86M
Avg. position size
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
3.29M
Value
240.47M
Filed
Jun 30, 2026
CAPITAL WORLD INVESTORS
CIK 1422849
Shares
2.84M
Value
207.49M
Filed
Jun 30, 2026
CALIFORNIA STATE TEACHERS RETIREMENT SYSTEM
CIK 1081019
Shares
2.69M
Value
36.90K
Filed
Jun 30, 2026
PRICE T ROWE ASSOCIATES INC /MD/
CIK 80255
Shares
2.21M
Value
161.09K
Filed
Jun 30, 2026
ORBIS ALLAN GRAY LTD
CIK 1663865
Shares
2.08M
Value
152.16M
Filed
Jun 30, 2026
DIMENSIONAL FUND ADVISORS LP
CIK 354204
Shares
2.05M
Value
149.78M
Filed
Jun 30, 2026
VANGUARD PORTFOLIO MANAGEMENT LLC
CIK 2100121
Shares
1.75M
Value
127.94M
Filed
Jun 30, 2026
BRANDES INVESTMENT PARTNERS, LP
CIK 1015079
Shares
1.57M
Value
114.83M
Filed
Jun 30, 2026
AQR CAPITAL MANAGEMENT LLC
CIK 1167557
Shares
1.57M
Value
114.64M
Filed
Jun 30, 2026
VANGUARD CAPITAL MANAGEMENT LLC
CIK 2100119
Shares
1.46M
Value
106.89M
Filed
Jun 30, 2026
STATE STREET CORP
CIK 93751
Shares
1.45M
Value
106.10M
Filed
Jun 30, 2026
GOLDMAN SACHS GROUP INC
CIK 886982
Shares
1.28M
Value
93.50M
Filed
Jun 30, 2026
CITADEL ADVISORS LLC
CIK 1423053
Shares
1.15M
Value
84.06M
Filed
Jun 30, 2026
MIRAE ASSET GLOBAL ETFS HOLDINGS LTD.
CIK 1705339
Shares
1.02M
Value
74.71M
Filed
Jun 30, 2026
NUVEEN ASSET MANAGEMENT, LLC
CIK 1521019
Shares
983.09K
Value
112.71M
Filed
Dec 31, 2024
SOROBAN CAPITAL PARTNERS LP
CIK 1517857
Shares
871.48K
Value
121.97M
Filed
Dec 31, 2023
UBS AM, A DISTINCT BUSINESS UNIT OF UBS ASSET MANAGEMENT AMERICAS LLC
CIK 861177
Shares
817.21K
Value
59.66M
Filed
Jun 30, 2026
HOLOCENE ADVISORS, LP
CIK 1700574
Shares
730.03K
Value
85.28M
Filed
Mar 31, 2026
| # | Institution | CIK | Shares | Est. Value | Period |
|---|---|---|---|---|---|
| 1 | VANGUARD GROUP INC | 102909 | 3.92M | 289.65M | Dec 31, 2025 |
| 2 | BLACKROCK FINANCE, INC. | 1364742 | 3.41M | 493.55M | Jun 30, 2024 |
| 3 | BLACKROCK, INC. | 2012383 | 3.29M | 240.47M | Jun 30, 2026 |
| 4 | CAPITAL WORLD INVESTORS | 1422849 | 2.84M | 207.49M | Jun 30, 2026 |
| 5 | CALIFORNIA STATE TEACHERS RETIREMENT SYSTEM | 1081019 | 2.69M | 36.90K | Jun 30, 2026 |
| 6 | PRICE T ROWE ASSOCIATES INC /MD/ | 80255 | 2.21M | 161.09K | Jun 30, 2026 |
| 7 | ORBIS ALLAN GRAY LTD | 1663865 | 2.08M | 152.16M | Jun 30, 2026 |
| 8 | DIMENSIONAL FUND ADVISORS LP | 354204 | 2.05M | 149.78M | Jun 30, 2026 |
| 9 | VANGUARD PORTFOLIO MANAGEMENT LLC | 2100121 | 1.75M | 127.94M | Jun 30, 2026 |
| 10 | BRANDES INVESTMENT PARTNERS, LP | 1015079 | 1.57M | 114.83M | Jun 30, 2026 |
| 11 | AQR CAPITAL MANAGEMENT LLC | 1167557 | 1.57M | 114.64M | Jun 30, 2026 |
| 12 | VANGUARD CAPITAL MANAGEMENT LLC | 2100119 | 1.46M | 106.89M | Jun 30, 2026 |
| 13 | STATE STREET CORP | 93751 | 1.45M | 106.10M | Jun 30, 2026 |
| 14 | GOLDMAN SACHS GROUP INC | 886982 | 1.28M | 93.50M | Jun 30, 2026 |
| 15 | CITADEL ADVISORS LLC | 1423053 | 1.15M | 84.06M | Jun 30, 2026 |
| 16 | MIRAE ASSET GLOBAL ETFS HOLDINGS LTD. | 1705339 | 1.02M | 74.71M | Jun 30, 2026 |
| 17 | NUVEEN ASSET MANAGEMENT, LLC | 1521019 | 983.09K | 112.71M | Dec 31, 2024 |
| 18 | SOROBAN CAPITAL PARTNERS LP | 1517857 | 871.48K | 121.97M | Dec 31, 2023 |
| 19 | UBS AM, A DISTINCT BUSINESS UNIT OF UBS ASSET MANAGEMENT AMERICAS LLC | 861177 | 817.21K | 59.66M | Jun 30, 2026 |
| 20 | HOLOCENE ADVISORS, LP | 1700574 | 730.03K | 85.28M | Mar 31, 2026 |
Data sourced from SEC Form 13F institutional holdings reports. Positions reflect the most recent filing per institution.