Westlake Corp: which funds bought and sold
Institutions that bought and sold Westlake shares in Q2 2026, from the holdings they reported to the SEC on Form 13F for March 31, 2026 and June 30, 2026.
Between March 31, 2026 and June 30, 2026, 186 institutions that filed 13F reports for both quarters added to or opened positions in Westlake, and 184 cut or closed them. Together they sold a net 4.5M shares, −10.3% on what they held at the start of the quarter. Active managers and hedge funds on our list were net sellers of 5.4M shares (−24.8%); index fund managers were net buyers of 320K shares (+3.4%). 77 opened a new position and 65 sold out entirely.
Bought, Q2 2026 186 institutions, 77 of them new holders Sold, Q2 2026 184 institutions, 65 of them sold out
Net change, all compared −4.5M shares (−10.3%)
Net change, active managers −5.4M shares (−24.8%), 31 bought, 25 sold
Buyers versus sellers
186 bought 41 184 sold
Active managers and hedge funds 31 bought · 25 sold · −5.4M
Index fund managers 6 bought · 5 sold · +320K
Other institutions 149 bought · 154 sold · +567K
Biggest buyers
| Institution | Change in shares | Shares June 30, 2026 | Value |
|---|---|---|---|
| AQR Capital Management LLC Hedge fund | +1.3M +503.9% | 1.6M | $115M |
| Dimensional Fund Advisors LP | +586K +39.9% | 2.1M | $150M |
| Jacobs Levy Equity Management, Inc Active manager | +360K +103.2% | 709K | $51.8M |
| Citadel Advisors LLC Hedge fund | +339K +47.4% | 1.1M | $77M |
| Exoduspoint Capital Management, LP Hedge fund | +327K New position | 327K | $23.9M |
| Qube Research & Technologies Ltd Hedge fund | +322K New position | 322K | $23.5M |
| Millennium Management LLC Hedge fund | +281K +330.7% | 366K | $26.7M |
| Balyasny Asset Management L.P. Hedge fund | +256K +69.3% | 626K | $45.7M |
| Blackrock, Inc. Index funds | +215K +7.0% | 3.3M | $240M |
| Susquehanna Portfolio Strategies, LLC | +212K +1154.1% | 230K | $16.8M |
| Jump Financial, LLC | +210K New position | 210K | $15.3M |
| Campbell & Co Investment Adviser LLC | +148K New position | 148K | $10.8M |
| Lighthouse Investment Partners, LLC Hedge fund | +135K New position | 135K | $9.9M |
| HRT Financial LP | +116K New position | 116K | $8.5M |
| Woodline Partners LP Hedge fund | +115K +34.1% | 452K | $33M |
| Marshall Wace, LLP Hedge fund | +112K New position | 112K | $8.1M |
| Tudor Investment Corp Et Al Hedge fund | +111K New position | 111K | $8.1M |
| Assenagon Asset Management S.A. | +111K New position | 111K | $8.1M |
| Russell Investments Group, Ltd. | +105K +117.5% | 194K | $14.2M |
| Geode Capital Management, LLC Index funds | +104K +17.0% | 719K | $52.5M |
| Institution | Change in shares | Shares June 30, 2026 | Value |
|---|---|---|---|
| AQR Capital Management LLC Hedge fund | +1.3M +503.9% | 1.6M | $115M |
| Jacobs Levy Equity Management, Inc Active manager | +360K +103.2% | 709K | $51.8M |
| Citadel Advisors LLC Hedge fund | +339K +47.4% | 1.1M | $77M |
| Exoduspoint Capital Management, LP Hedge fund | +327K New position | 327K | $23.9M |
| Qube Research & Technologies Ltd Hedge fund | +322K New position | 322K | $23.5M |
| Millennium Management LLC Hedge fund | +281K +330.7% | 366K | $26.7M |
| Balyasny Asset Management L.P. Hedge fund | +256K +69.3% | 626K | $45.7M |
| Lighthouse Investment Partners, LLC Hedge fund | +135K New position | 135K | $9.9M |
| Woodline Partners LP Hedge fund | +115K +34.1% | 452K | $33M |
| Marshall Wace, LLP Hedge fund | +112K New position | 112K | $8.1M |
Biggest sellers
| Institution | Change in shares | Shares June 30, 2026 | Value |
|---|---|---|---|
| Orbis Allan Gray Ltd Active manager | −3.2M −60.6% | 2.1M | $152M |
| Wellington Management Group LLP Active manager | −1.7M −92.1% | 142K | $10.4M |
| Capital World Investors Active manager | −1.4M −32.5% | 2.8M | $207M |
| FMR LLC Active manager | −951K −72.5% | 361K | $26.4M |
| Holocene Advisors, LP Hedge fund | −730K Sold out | 0 | — |
| UBS Group AG | −380K −46.8% | 432K | $31.5M |
| Brandes Investment Partners, LP Active manager | −270K −14.6% | 1.6M | $115M |
| New York State Common Retirement Fund | −269K −86.8% | 41K | $3M |
| Federated Hermes, Inc. Active manager | −264K −99.0% | 2,574 | $187,902 |
| Deprince Race & Zollo Inc Active manager | −203K Sold out | 0 | — |
| Price T Rowe Associates Inc Active manager | −201K −8.3% | 2.2M | $161M |
| Ceredex Value Advisors LLC | −178K Sold out | 0 | — |
| Merewether Investment Management, LP | −166K −75.7% | 53K | $3.9M |
| UBS Am, A Distinct Business Unit Of UBS Asset Management Americas LLC | −164K −16.7% | 817K | $59.7M |
| Man Group PLC Hedge fund | −135K −84.0% | 26K | $1.9M |
| Capstone Investment Advisors, LLC Hedge fund | −131K −96.5% | 4,721 | $344,633 |
| Allspring Global Investments Holdings, LLC | −122K −42.9% | 163K | $11.9M |
| Nuveen, LLC | −118K −20.9% | 446K | $32.6M |
| Goldman Sachs Group Inc | −112K −8.1% | 1.3M | $93.5M |
| Yaupon Capital Management LP Hedge fund | −107K Sold out | 0 | — |
| Institution | Change in shares | Shares June 30, 2026 | Value |
|---|---|---|---|
| Orbis Allan Gray Ltd Active manager | −3.2M −60.6% | 2.1M | $152M |
| Wellington Management Group LLP Active manager | −1.7M −92.1% | 142K | $10.4M |
| Capital World Investors Active manager | −1.4M −32.5% | 2.8M | $207M |
| FMR LLC Active manager | −951K −72.5% | 361K | $26.4M |
| Holocene Advisors, LP Hedge fund | −730K Sold out | 0 | — |
| Brandes Investment Partners, LP Active manager | −270K −14.6% | 1.6M | $115M |
| Federated Hermes, Inc. Active manager | −264K −99.0% | 2,574 | $187,902 |
| Deprince Race & Zollo Inc Active manager | −203K Sold out | 0 | — |
| Price T Rowe Associates Inc Active manager | −201K −8.3% | 2.2M | $161M |
| Man Group PLC Hedge fund | −135K −84.0% | 26K | $1.9M |
New positions
| Institution | Shares | Value June 30, 2026 |
|---|---|---|
| Exoduspoint Capital Management, LPHedge fund | 327K | $23.9M |
| Qube Research & Technologies LtdHedge fund | 322K | $23.5M |
| Jump Financial, LLC | 210K | $15.3M |
| Campbell & Co Investment Adviser LLC | 148K | $10.8M |
| Lighthouse Investment Partners, LLCHedge fund | 135K | $9.9M |
| HRT Financial LP | 116K | $8.5M |
| Marshall Wace, LLPHedge fund | 112K | $8.1M |
| Tudor Investment Corp Et AlHedge fund | 111K | $8.1M |
| Assenagon Asset Management S.A. | 111K | $8.1M |
| Point72 Asset Management, L.P.Hedge fund | 90K | $6.6M |
Sold out
| Institution | Shares | Value March 31, 2026 |
|---|---|---|
| Holocene Advisors, LPHedge fund | 730K | $85.3M |
| Deprince Race & Zollo IncActive manager | 203K | $23.8M |
| Ceredex Value Advisors LLC | 178K | $20.8M |
| Yaupon Capital Management LPHedge fund | 107K | $12.5M |
| Lloyd Harbor Capital Management, LLC | 62K | $7.2M |
| Rokos Capital Management LLPHedge fund | 61K | $7.1M |
| Albar Capital Partners LLP | 49K | $5.7M |
| Trek Financial, LLC | 45K | $5.3M |
| Twin Tree Management, LPHedge fund | 36K | $4.2M |
| Boston PartnersActive manager | 32K | $3.7M |
Who holds the shares
- Institutions reporting
- 355
- Ten largest holders
- 51.0% of 13F-reported shares
- Index fund managers
- 24.6% of 13F-reported shares
- Active managers and hedge funds
- 41.3% of 13F-reported shares
| Type | Bought | Sold | New | Sold out | Net change in shares | Net % |
|---|---|---|---|---|---|---|
| Active managers and hedge funds | 31 | 25 | 15 | 9 | −5.4M | −24.8% |
| Index fund managers | 6 | 5 | 0 | 0 | +320K | +3.4% |
| Other institutions | 149 | 154 | 62 | 56 | +567K | +4.5% |