WESTLAKE CORPORATION (WLK): Ownership & Insider Activity
Hedge funds and institutional managers reporting a position in WLK · Materials. Based on the most recent 13F filing from each holder, sourced from SEC EDGAR.
Reported Holders
26
13F filers
Aggregate Value
$415.7M
Across holders
Last Price
$76.49
2026-08-24
Sector
Materials
GICS
Quarterly fund activity19 increased6 reduced4 exited
| Manager⇅ | Type⇅ | Shares⇅ | Market Value▼ | % of Total⇅ | % of Portfolio⇅ | Action⇅ | QoQ Change⇅ | Quarter⇅ |
|---|---|---|---|---|---|---|---|---|
| AQR CAPITAL MANAGEMENT LLC CIK 0001167557 | Hedge Fund | 1.57M | $114.6M | 27.6% | 0.0% | Added | +$114.4M | Q2 2026 |
| CITADEL ADVISORS LLC CIK 0001423053 | Hedge Fund | 1.05M | $77.0M | 18.5% | 0.0% | Added | +$67.9M | Q2 2026 |
| BALYASNY ASSET MANAGEMENT LLC CIK 0001218710 | Hedge Fund | 626K | $45.7M | 11.0% | 0.1% | Added | +$18.7M | Q2 2026 |
| Woodline Partners LP CIK 0001784547 | Hedge Fund | 452K | $33.0M | 7.9% | 0.1% | Added | +$8.4M | Q2 2026 |
| MILLENNIUM MANAGEMENT LLC CIK 0001273087 | Hedge Fund | 366K | $26.7M | 6.4% | 0.0% | Added | +$20.5M | Q2 2026 |
| ExodusPoint Capital Management, LP CIK 0001736225 | Hedge Fund | 327K | $23.9M | 5.7% | 0.2% | Added | — | Q2 2026 |
| Qube Research & Technologies Ltd CIK 0001729829 | Hedge Fund | 322K | $23.5M | 5.6% | 0.0% | Added | — | Q2 2026 |
| SHAW D E & CO INC CIK 0001009207 | Hedge Fund | 201K | $14.6M | 3.5% | 0.0% | Reduced | +$13.7M | Q2 2026 |
| Lighthouse Investment Partners, LLC CIK 0001600344 | Hedge Fund | 135K | $9.9M | 2.4% | 0.3% | Added | — | Q2 2026 |
| MARSHALL WACE, LLP CIK 0001318757 | Hedge Fund | 112K | $8.1M | 2.0% | 0.0% | Added | — | Q2 2026 |
Added
Hedge Fund
$114.6M· 27.6% of total· 0.0% port· 1.57M sh· +$114.4M QoQ· Q2 2026
Added
Hedge Fund
$77.0M· 18.5% of total· 0.0% port· 1.05M sh· +$67.9M QoQ· Q2 2026
Added
Hedge Fund
$45.7M· 11.0% of total· 0.1% port· 626K sh· +$18.7M QoQ· Q2 2026
Added
Hedge Fund
$33.0M· 7.9% of total· 0.1% port· 452K sh· +$8.4M QoQ· Q2 2026
Added
Hedge Fund
$26.7M· 6.4% of total· 0.0% port· 366K sh· +$20.5M QoQ· Q2 2026
Added
Hedge Fund
$23.9M· 5.7% of total· 0.2% port· 327K sh· — QoQ· Q2 2026
Added
Hedge Fund
$23.5M· 5.6% of total· 0.0% port· 322K sh· — QoQ· Q2 2026
Reduced
Hedge Fund
$14.6M· 3.5% of total· 0.0% port· 201K sh· +$13.7M QoQ· Q2 2026
Added
Hedge Fund
$9.9M· 2.4% of total· 0.3% port· 135K sh· — QoQ· Q2 2026
Added
Hedge Fund
$8.1M· 2.0% of total· 0.0% port· 112K sh· — QoQ· Q2 2026
Added
Hedge Fund
$8.1M· 1.9% of total· 0.0% port· 111K sh· — QoQ· Q2 2026
Added
Hedge Fund
$6.6M· 1.6% of total· 0.0% port· 90K sh· — QoQ· Q2 2026
Added
Hedge Fund
$6.0M· 1.5% of total· 0.0% port· 83K sh· +$5.9M QoQ· Q2 2026
Added
Hedge Fund
$5.8M· 1.4% of total· 0.0% port· 80K sh· +$3.0M QoQ· Q2 2026
Added
Hedge Fund
$3.3M· 0.8% of total· 0.0% port· 45K sh· — QoQ· Q2 2026
Reduced
Hedge Fund
$1.9M· 0.5% of total· 0.0% port· 26K sh· $-9.8M QoQ· Q2 2026
Added
Hedge Fund
$1.3M· 0.3% of total· 0.0% port· 18K sh· — QoQ· Q2 2026
Added
Hedge Fund
$1.2M· 0.3% of total· 0.0% port· 17K sh· +$1.1M QoQ· Q2 2026
Added
Hedge Fund
$1.2M· 0.3% of total· 0.0% port· 17K sh· — QoQ· Q2 2026
Reduced
Hedge Fund
$1.1M· 0.3% of total· 0.0% port· 15K sh· $-1.4M QoQ· Q2 2026
Added
Hedge Fund
$893K· 0.2% of total· 0.0% port· 12K sh· +$150K QoQ· Q2 2026
Reduced
Hedge Fund
$345K· 0.1% of total· 0.0% port· 5K sh· $-9.6M QoQ· Q2 2026
Added
Hedge Fund
$294K· 0.1% of total· 0.0% port· 4K sh· — QoQ· Q2 2026
Unchanged
Institutional Manager
$255K· 0.1% of total· 0.0% port· 3K sh· +$0 QoQ· Q2 2026
Reduced
Institutional Manager
$207K· 0.0% of total· 0.0% port· 3K sh· $-825K QoQ· Q2 2026
Reduced
Hedge Fund
$29K· 0.0% of total· 0.0% port· 395 sh· $-96K QoQ· Q2 2026
1–10 of 26
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