13F reference period
Q2 2026
Security Snapshot
WESTLAKE CORP - COM (WLK) Institutional Ownership
CUSIP: 960413102
13F Institutional Holders and Ownership History from Q1 2014 to Q3 2026
Institutions Reporting
357
Shares (Excl. Options)
39,667,232
Price
$73.00
The headline uses the Q2 2026 reference period after its reporting deadline. Available reports may still be incomplete or amended. Newer periods in the history table contain incoming reports and may be incomplete.
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- Security type / class
- Equity / COM
- Symbol
- WLK on NYSE
- All holders as of 30 Jun 2026
- Q2 2026
- Total 13F shares
- 39,667,232
- Total 13F value
- $2,897,121,162
- Portfolio coverage rank
- 0%
- Share change
- -4,456,277
- Value change
- -$401,774,407
- Number of holders
- 357
- SEC-reported price per share
- $62.31
- Insider filing price
- $62.31
Latest holder snapshot
5 signals
Issuer context
Names, identifiers, and filing context for this profile.
2 identity fields
13F Shares, Excluding Options vs Price
13F Value, Excluding Options
Total Investors
Filing notes and source
Key facts
- WLK - WESTLAKE CORP - COM is tracked under CUSIP 960413102.
- 357 institutions reported positions in Q2 2026.
- Schedule 13D/13G significant owner rows are not currently available.
Change
- Holder count moved from 339 to 357 between Q1 2026 and Q2 2026.
- SEC-reported value moved from $5,148,838,981 to $2,897,121,162.
Research use
- You can quickly see who holds this security, then open quarter and manager detail pages for full evidence.
- 13F and Schedule 13D/13G sections are kept together so you can cross-check institutional and beneficial ownership context.
Evidence
Source: SEC Form 13F
Open SEC evidence
Latest holder context comes from 357 institutions filings for Q2 2026.
Security key
960413102
13F reference period
Q2 2026
13F holders
357
13D/G owners
0
CIK / CUSIP context first
Open Q2 2026 holders
WLK full holder history
WESTLAKE CORP SEC filings
WESTLAKE CORP company facts
WESTLAKE CORP insider transactions
Broader feeds
Recent Quarterly Holder Reports
Open recent reporting periods for CUSIP 960413102:
As of 30 Jun 2026, 357 institutional investors reported holding 39,667,232 shares of WESTLAKE CORP - COM (WLK).
Quarter history
Institutional holders across reporting periods
Holder count, reported shares/value, and median price by quarter.
Periods
51
Headline period
Q2 2026
Rows shown
1-25 of 51
| Period | 13F Shares, Excl. Options | Value, Excl. Options | Value Change | Price (Median) | Investors |
|---|---|---|---|---|---|
| 2026 Q3 | 175,828 | $10,956,260 | -$3,691,007 | $62.31 | 44 |
| 2026 Q2 | 39,667,232 | $2,897,121,162 | -$401,774,407 | $73.00 | 357 |
| 2026 Q1 | 44,108,710 | $5,148,838,981 | -$100,744,648 | $116.82 | 339 |
| 2025 Q4 | 46,394,609 | $3,430,832,795 | +$351,420,620 | $73.94 | 294 |
| 2025 Q3 | 41,501,786 | $3,197,756,199 | +$174,265,156 | $77.06 | 298 |
| 2025 Q2 | 39,331,374 | $2,988,909,852 | +$191,189,516 | $75.93 | 302 |
| 2025 Q1 | 35,955,773 | $3,595,027,641 | +$89,650,088 | $100.03 | 355 |
| 2024 Q4 | 35,062,846 | $4,016,892,549 | +$119,920,399 | $114.65 | 374 |
| 2024 Q3 | 33,626,464 | $5,051,906,427 | -$54,418,100 | $150.29 | 398 |
| 2024 Q2 | 33,918,505 | $4,913,906,263 | -$137,440,495 | $144.82 | 377 |
| 2024 Q1 | 34,008,729 | $5,196,165,363 | -$259,342,603 | $152.80 | 341 |
| 2023 Q4 | 35,887,292 | $5,022,573,110 | -$159,272,587 | $139.96 | 353 |
| 2023 Q3 | 37,104,188 | $4,625,180,937 | +$28,466,158 | $124.67 | 332 |
| 2023 Q2 | 36,790,936 | $4,397,162,133 | -$119,828,518 | $119.47 | 335 |
| 2023 Q1 | 37,754,020 | $4,377,194,379 | +$194,466,931 | $115.98 | 337 |
| 2022 Q4 | 36,255,792 | $3,718,239,748 | +$183,422,803 | $102.54 | 339 |
| 2022 Q3 | 34,810,948 | $3,025,069,640 | -$110,809,833 | $86.88 | 305 |
| 2022 Q2 | 35,641,273 | $3,493,033,437 | +$36,281,949 | $98.02 | 337 |
| 2022 Q1 | 35,524,019 | $4,384,712,928 | +$126,016,952 | $123.40 | 316 |
| 2021 Q4 | 34,660,108 | $3,365,576,971 | +$1,084,841 | $97.13 | 286 |
| 2021 Q3 | 34,506,444 | $3,148,158,781 | +$92,156,053 | $91.14 | 261 |
| 2021 Q2 | 33,534,876 | $3,021,041,387 | -$109,607,743 | $90.09 | 267 |
| 2021 Q1 | 34,753,905 | $3,085,828,789 | +$119,243,678 | $88.79 | 231 |
| 2020 Q4 | 33,570,512 | $2,739,246,603 | -$115,149,486 | $81.60 | 217 |
| 2020 Q3 | 35,059,178 | $2,216,373,693 | -$89,007,831 | $63.22 | 193 |