Westlake Corporation
DE ˙ DB ˙ US9604131022
€ 74,44 ↑1.62 (2.22%)
2026-06-05
PREÇO DA AÇÃO
SecurityDE:UEO / Westlake Corporation
InstitutionVanguard Group Inc
Latest Disclosed Ownership3,917,329 shares
Latest Disclosed Value $ 289,647,306
Vanguard Group Inc reports 13.89% increase in ownership of UEO / Westlake Corporation

On January 29, 2026 - Vanguard Group Inc filed a 13F-HR form disclosing ownership of 3,917,329 shares of Westlake Corporation (DE:UEO) valued at $244,833,062 USD as of December 31, 2025. The entity filed a previous 13F-HR on November 7, 2025 disclosing 3,439,631 shares of Westlake Corporation. This represents a change in shares of 13.89% during the quarter. The current value of the position is $291,605,971 USD.

Institutional Ownership: 13F and NPORT Filings

The Security and Class in the table below are shown exactly as filed by the investor. We do our best to track continuity of investments through acquisitions, and this will be reflected in the table as changes in names. In addition to descriptive data, performance of the investment is shown over time. To calculate quarterly performance, we first calculate cost basis of the shares purchased during the quarter, then use that to calculate gross profit. Quarterly return is Gross Profit / Starting Portfolio value.

Note that cost basis is calculated and stored in thousands, so small quarterly changes in shares frequently result in a cost basis of zero.

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Disclosed Equity Positions (from 13F/NPORT Filings)
File
Date		 Effective
Date		Form Security Class ID Avg Price
Paid (Est)		 Reported
Shares		 ΔShares ΔShares
(%)		 Reported
Value
(x1000)		 ΔValue
(%)		 Alloc
(%)		 ΔAlloc ΔAlloc (%) Cost Basis
(x1000)		 Unrealized
Gain/Loss
(x1000)
2026-01-29 2025-12-31 13F WESTLAKE COM 960413102 3,917,329 477,698 13.89 289,647 9.28 0.0042
2025-11-07 2025-09-30 13F WESTLAKE COM 960413102 3,439,631 -83,179 -2.36 265,058 -0.91 0.0040
2025-08-11 2025-06-30 13F WESTLAKE COM 960413102 3,522,810 -27,500 -0.77 267,487 -24.68 0.0043
2025-05-09 2025-03-31 13F WESTLAKE COM 960413102 3,550,310 -327,663 -8.45 355,138 -20.12 0.0064
2025-02-11 2024-12-31 13F WESTLAKE COM 960413102 3,877,973 21,293 0.55 444,610 -23.29 0.0077
2024-11-13 2024-09-30 13F WESTLAKE COM 960413102 3,856,680 14,772 0.38 579,620 4.18 0.0104
2024-08-13 2024-06-30 13F WESTLAKE COM 960413102 3,841,908 479,962 14.28 556,385 8.31 0.0107
2024-05-10 2024-03-31 13F WESTLAKE COM 960413102 3,361,946 -25,446 -0.75 513,705 8.35 0.0102
2024-03-11 2023-12-31 13F/A-1 WESTLAKE COM 960413102 3,387,392 4,528 0.13 474,099 12.41 0.0104
2024-02-14 2023-12-31 13F WESTLAKE COM 960413102 3,387,392 4,528 474,099 0.0090
2023-12-18 2023-09-30 13F/A-1 WESTLAKE COM 960413102 3,382,864 -66,657 -1.93 421,742 2.34 0.0104
2023-11-14 2023-09-30 13F WESTLAKE COM 960413102 3,382,864 -66,657 421,742 0.0019
2023-08-14 2023-06-30 13F WESTLAKE COM 960413102 3,449,521 -12,231 -0.35 412,114 2.65 0.0098
2023-07-14 2023-03-31 13F/A-1 WESTLAKE COM 960413102 3,461,752 5,230 0.15 401,494 13.28 0.0102
2023-05-15 2023-03-31 13F WESTLAKE COM 960413102 3,461,752 5,230 401,494 0.0021
2023-02-10 2022-12-31 13F WESTLAKE COM 960413102 3,456,522 113,647 3.40 354,432 22.04 0.0097
2022-11-14 2022-09-30 13F WESTLAKE COM 960413102 3,342,875 -272,204 -7.53 290,429 -18.04 0.0085
2022-08-12 2022-06-30 13F WESTLAKE COM 960413102 3,615,079 -421,122 -10.43 354,350 -28.85 0.0100
2022-05-13 2022-03-31 13F WESTLAKE COM 960413102 4,036,201 -17,245 -0.43 498,067 26.51 0.0118
2022-02-14 2021-12-31 13F WESTLAKE CHEM COM 960413102 4,053,446 129,667 3.30 393,711 10.09 0.0089
2021-11-12 2021-09-30 13F WESTLAKE CHEM COM 960413102 3,923,779 -74,191 -1.86 357,613 -0.71 0.0089
2021-08-13 2021-06-30 13F WESTLAKE CHEM COM 960413102 3,997,970 269,403 7.23 360,177 8.80 0.0090
2021-05-14 2021-03-31 13F WESTLAKE CHEM COM 960413102 3,728,567 -75,449 -1.98 331,060 6.65 0.0090
2021-02-12 2020-12-31 13F WESTLAKE CHEM COM 960413102 3,804,016 66,820 1.79 310,407 31.38 0.0090
2020-11-16 2020-09-30 13F WESTLAKE CHEM COM 960413102 3,737,196 -168,135 -4.31 236,266 12.77 0.0078
2020-08-14 2020-06-30 13F WESTLAKE CHEM COM 960413102 3,905,331 -966,050 -19.83 209,520 12.68 0.0074
2020-05-15 2020-03-31 13F WESTLAKE CHEM COM 960413102 4,871,381 113,088 2.38 185,940 -44.30 0.0079
2020-02-14 2019-12-31 13F WESTLAKE CHEM COM 960413102 4,758,293 56,825 1.21 333,795 8.36 0.0114
2019-11-14 2019-09-30 13F WESTLAKE CHEM COM 960413102 4,701,468 1,944 0.04 308,040 -5.63 0.0114
2019-08-14 2019-06-30 13F WESTLAKE CHEM COM 960413102 4,699,524 77,773 1.68 326,429 4.08 0.0123
2019-05-15 2019-03-31 13F WESTLAKE CHEM COM 960413102 4,621,751 -452,388 -8.92 313,633 -6.59 0.0123
2019-02-14 2018-12-31 13F WESTLAKE CHEM COM 960413102 5,074,139 -195,625 -3.71 335,755 -23.34 0.0151
2018-12-13 2018-09-30 13F/A-2 WESTLAKE CHEM COM 960413102 5,269,764 112,200 2.18 437,970 -21.10 0.0171
2018-11-23 2018-09-30 13F/A-1 WESTLAKE CHEM COM 960413102 5,269,764 0 437,970 0.0171
2018-11-14 2018-09-30 13F WESTLAKE CHEM COM 960413102 5,269,764 112,200 437,970
2018-08-14 2018-06-30 13F WESTLAKE CHEM COM 960413102 5,157,564 200,997 4.06 555,108 0.76 0.0232
2018-05-15 2018-03-31 13F WESTLAKE CHEM COM 960413102 4,956,567 173,061 3.62 550,922 8.11 0.0241
2018-02-14 2017-12-31 13F WESTLAKE CHEM COM 960413102 4,783,506 458,889 10.61 509,587 41.81 0.0223
2017-11-14 2017-09-30 13F WESTLAKE CHEM COM 960413102 4,324,617 46,941 1.10 359,333 26.87 0.0168
2017-08-24 2017-06-30 13F/A-1 WESTLAKE CHEM COM 960413102 4,277,676 75,728 1.80 283,225 2.05 0.0139
2017-08-11 2017-06-30 13F WESTLAKE CHEM COM 960413102 4,277,676 75,728 283,225
2017-05-12 2017-03-31 13F WESTLAKE CHEM COM 960413102 4,201,948 326,298 8.42 277,538 27.90 0.0143
2017-02-14 2016-12-31 13F WESTLAKE CHEM COM 960413102 3,875,650 123,559 3.29 216,997 8.10 0.0121
2016-11-14 2016-09-30 13F WESTLAKE CHEM COM 960413102 3,752,091 26,861 0.72 200,738 25.55 0.0118
2016-08-10 2016-06-30 13F WESTLAKE CHEM COM 960413102 3,725,230 -184,688 -4.72 159,887 -11.68 0.0099
2016-05-13 2016-03-31 13F WESTLAKE CHEM COM 960413102 3,909,918 212,611 5.75 181,029 -9.86 0.0117
2016-02-08 2015-12-31 13F WESTLAKE CHEM COM 960413102 3,697,307 103,700 2.89 200,838 7.70 0.0135
2015-11-12 2015-09-30 13F/A-1 WESTLAKE CHEM COM 960413102 3,593,607 5,373 0.15 186,473 -24.23 0.0079
2015-11-12 2015-09-30 13F/A-1 WESTLAKE CHEM COM 960413102 3,593,607 5,373 186,473 0.0079
2015-08-13 2015-06-30 13F WESTLAKE CHEM COM 960413102 3,588,234 6,652 0.19 246,117 -4.48 0.0166
2015-05-15 2015-03-31 13F/A-1 WESTLAKE CHEM COM 960413102 3,581,582 852,567 31.24 257,660 54.55 0.0175
2015-05-14 2015-03-31 13F WESTLAKE CHEM COM 960413102 3,581,582 257,660
2015-02-12 2014-12-31 13F WESTLAKE CHEM COM 960413102 2,729,015 -339,011 -11.05 166,716 -37.24 0.0120
2014-11-12 2014-09-30 13F WESTLAKE CHEM COM 960413102 3,068,026 37,926 1.25 265,660 4.67 0.0207
2014-08-11 2014-06-30 13F WESTLAKE CHEM COM 960413102 3,030,100 123,910 4.26 253,801 31.96 0.0200
2014-05-13 2014-03-31 13F WESTLAKE CHEM COM 960413102 2,906,190 1,495,806 106.06 192,332 11.71 0.0162
2014-02-12 2013-12-31 13F WESTLAKE CHEM COM 960413102 1,410,384 15,584 1.12 172,166 17.94 0.0151
2013-11-07 2013-09-30 13F WESTLAKE CHEM COM 960413102 1,394,800 15,071 1.09 145,980 9.74 0.0143
2013-08-13 2013-06-30 13F WESTLAKE CHEM COM 960413102 1,379,729 1,379,729 133,019 0.0140
Legend
Shares
The total number of shares held by the institution at the end of the reporting period (the effective date). This is provided in the filing.
Value
The total value of the shares as of the effective date. This is provided in the filing.
Avg. Share Price
The weighted average share price of the shares held by the institution. We use FIFO accounting to determine this price
Class
This is the security class as indicated by the filer. There are a variety of values for this field. Common values include "EC" = equity common, "EP" - equity preferred
Allocation (%)
The percent of the institution's portfolio that this position represents. This is provided in NPORT filings. For 13F filings, we calculate it.
Change in Allocation
The change in allocation from the prior reporting period. This is calculated as current allocation - prior allocation.
Change in Allocation (%)
The percent change in allocation from the prior reporting period. This is calculated as (current allocation - prior allocation) / prior allocation.
Cost Basis
The total cost of the shares held. This is calculated as reported shares * avg. share price
Unrealized Gain/Loss
This is the market value of the position as of the effective date minus the cost basis.