WLK Institutional Ownership
Who owns Westlake Corp and what the big funds did with it last quarter, from every SEC 13F filing. 361 funds reported holding WLK at Jun 30, 2026, together owning 31.1% of the company.
- ●190 buying vs 183 selling
- ▼Held by funds -3.4 pts
- ▲Funds holding +19
- ▲Superinvestors: 3 added, 1 cut
- ●Put/call not meaningful
What the filings show, not a forecast. Positions can be up to 45 days old and leave out short sales.
Funds holding and ownership
8 quartersQuarter over quarter
all 13F filers| Q2 2026 | This quarter | Q1 2026 | Change |
|---|---|---|---|
| Funds holding | 361 | 342 | +5.6% |
| In funds' top 10 | 2 | 3 | −33.3% |
| 13F shares | 39.8M | 44.1M | −9.8% |
| Held by funds | 31.1% | 34.5% | −3.4 pts |
| New positions | 81 | 86 | −5.8% |
| Increased | 109 | 116 | −6.0% |
| Reduced | 119 | 87 | +36.8% |
| Sold out | 64 | 47 | +36.2% |
| Calls (shares) | 0 | 47K | −100.0% |
| Puts (shares) | 3,300 | 35K | −90.6% |
| Put/call ratio | – | 0.75 | – |
Buyers vs sellers
adding or new vs cutting or sold outSuperinvestors in WLK
All superinvestors →
Who owns WLK
share of fund held shares- Index and passive funds30.4%
- Active managers and hedge funds56.5%
- Banks and brokers11.3%
- Pensions, insurers and other1.9%
The top 10 holders own 51.0% of all WLK shares that funds reported. Groups are our own grouping of filers by name.
Put/call ratio
funds' options, market makers left outAbove 1 means funds hold more puts than calls, a sign of hedging or bets on a fall. Options are valued at the underlying shares.
Filed so far for Q3 2026
78 funds changed their position- Assenagon Asset Management S.A.Sold out−111K sh
- ProShare Advisors LLCAdded+124K sh
- Oak Thistle LLCNew+24K sh
- Creative PlanningAdded+12K sh
- BI Asset Management Fondsmaeglerselskab A/STrimmed−11K sh
🔒 Free account: see all 20.
Top holders
Q2 2026| # | Fund | Of company | Shares | Value | Change |
|---|---|---|---|---|---|
| 1 | BlackRock, Inc. | 2.58% | 3.3M | $240M | +215K |
| 2 | Capital World Investors | 2.22% | 2.8M | $207M | −1.4M |
| 3 | Price T Rowe Associates Inc /md/ | 1.73% | 2.2M | $161M | −201K |
| 4 | Orbis Allan Gray Ltd | 1.63% | 2.1M | $152M | −3.2M |
| 5 | Dimensional Fund Advisors LP | 1.61% | 2.1M | $150M | +586K |
| 6 | Vanguard Portfolio Management LLC | 1.37% | 1.8M | $128M | −17K |
| 7 | Brandes Investment Partners, LP | 1.23% | 1.6M | $115M | −270K |
| 8 | AQR Capital Management LLC | 1.23% | 1.6M | $115M | +1.3M |
| 9 | Vanguard Capital Management LLC | 1.15% | 1.5M | $107M | +8,629 |
| 10 | State Street Corp | 1.14% | 1.5M | $106M | +73K |
- AQR Capital Management LLC+1.3M sh+$95.7M
- Dimensional Fund Advisors LP+586K sh+$42.7M
- Jacobs Levy Equity Management, Inc+360K sh+$26.3M
- Citadel Advisors LLC+339K sh+$24.8M
- ExodusPoint Capital Management, LP+327K sh+$23.9M
- Qube Research & Technologies Ltd+322K sh+$23.5M
- Millennium Management LLC+281K sh+$20.5M
- Balyasny Asset Management L.P.+256K sh+$18.7M
- Orbis Allan Gray Ltd−3.2M sh−$234M
- Wellington Management Group LLP−1.7M sh−$121M
- Capital World Investors−1.4M sh−$99.9M
- Holocene Advisors, LP−730K sh−$85.3M
- Fmr LLC−951K sh−$69.4M
- UBS Group AG−380K sh−$27.7M
- Deprince Race & Zollo Inc−203K sh−$23.8M
- Ceredex Value Advisors LLC−178K sh−$20.8M
WLK institutional ownership FAQ
Who owns the most WLK stock?
In Q2 2026 13F filings the largest holder of WLK was BlackRock, Inc., followed by Capital World Investors and Price T Rowe Associates Inc /md/. Index fund managers are usually the biggest holders of large companies.
What percentage of WLK is owned by institutions?
Funds that file 13F reports held 31.1% of WLK's shares at Jun 30, 2026, compared with 34.5% a quarter earlier. That counts every manager with more than $100 million in US stocks.
Are hedge funds buying WLK?
In Q2 2026, 190 funds bought WLK (81 of them new positions) and 183 sold (64 sold out completely). Among well known investors, 3 added and 1 cut. Our fund sentiment for WLK is neutral.
What is WLK's institutional put/call ratio?
Too few option positions were reported for a meaningful ratio.
How current is this WLK ownership data?
13F filings show holdings at the end of each quarter and are due within 45 days, so positions can be up to six weeks old when they appear. We add each new filing within minutes, and the "filed so far" list shows funds that have already reported the next quarter.
For informational and educational purposes only. Not investment advice, and not a recommendation to buy or sell any security. Fund sentiment summarises what 13F filings show and is not a forecast. Holdings come from SEC Form 13F filings as reported and show positions at the end of the quarter, up to 45 days before the filing. A 13F leaves out short positions, cash, bonds and most foreign holdings. See all hedge fund holdings.