Westlake Ownership | Who Owns Westlake?
Westlake Ownership Summary
Westlake is owned by 31.55% institutional investors, 74.15% insiders. Orbis allan gray is the largest institutional shareholder, holding 3.05% of WLK shares. Sycamore Mid Cap Value Comp is the top mutual fund, with 2.20% of its assets in Westlake shares.
WLK Ownership Benchmark
| Type | Name | % Inst | % Insiders | % Retail |
|---|---|---|---|---|
| Stock | Westlake | 31.55% | 74.15% | -5.70% |
| Sector | Basic Materials Stocks | 36.61% | 12.69% | 50.70% |
Institutional Shareholders
Top Institutional Shareholders by Total Shares
| Holder | Shares | % Holding | Value |
|---|---|---|---|
| Orbis allan gray | 3.91M | 3.05% | $301.64M |
| Vanguard group | 3.44M | 2.68% | $265.06M |
| Blackrock | 3.41M | 2.65% | $493.55M |
| Blackrock funding, inc. /de | 3.19M | 2.48% | $245.49M |
| Victory capital management | 2.87M | 2.23% | $220.88M |
| Price t rowe associates inc /md/ | 2.21M | 1.72% | $170.16M |
| Brandes investment partners, lp | 1.55M | 1.21% | $119.34M |
| Dimensional fund advisors lp | 1.30M | 1.01% | $100.20M |
| State street | 1.30M | 1.01% | $99.81M |
| Goldman sachs group | 1.05M | 0.82% | $81.02M |
Top Institutional Shareholders by % of Total Assets
| Holder | Shares | % Assets | Value |
|---|---|---|---|
| Impala asset management | 115.00K | 6.00% | $8.86M |
| Lloyd harbor capital management | 110.00K | 3.30% | $8.48M |
| Walnut level capital | 57.68K | 2.66% | $4.44M |
| Robotti robert | 181.85K | 2.43% | $14.01M |
| Orbis allan gray | 3.91M | 1.29% | $301.64M |
| Antipodes partners | 555.90K | 0.96% | $42.84M |
| Brandes investment partners, lp | 1.55M | 0.96% | $119.34M |
| Board of the pension protection fund | 9.50K | 0.72% | $732.07K |
| Thomist capital management, lp | 46.20K | 0.70% | $3.56M |
| Thompson siegel & walmsley | 441.34K | 0.55% | $34.01M |
Top Buyers
| Holder | Shares | % Assets | Change |
|---|---|---|---|
| Orbis allan gray | 3.91M | 1.29% | 3.91M |
| Holocene advisors, lp | 854.18K | 0.15% | 696.03K |
| Thompson siegel & walmsley | 441.34K | 0.55% | 441.34K |
| Norges bank | 406.71K | 0.01% | 406.71K |
| Caisse de depot et placement du quebec | 368.32K | 0.05% | 368.32K |
Top Sellers
| Holder | Shares | % Assets | Change |
|---|---|---|---|
| Fmr | 314.35K | 0.00% | -1.30M |
| Capital world investors | - | - | -1.29M |
| Victory capital management | 2.87M | 0.13% | -855.38K |
| Balyasny asset management | 79.85K | 0.01% | -442.03K |
| Bank of america corp /de/ | - | - | -403.20K |
New Positions
| Holder | Shares | % Assets | Change | Value |
|---|---|---|---|---|
| Orbis allan gray | 3.91M | 1.29% | 3.91M | $301.64M |
| Thompson siegel & walmsley | 441.34K | 0.55% | 441.34K | $34.01M |
| Norges bank | 406.71K | 0.01% | 406.71K | $46.63M |
| Caisse de depot et placement du quebec | 368.32K | 0.05% | 368.32K | $28.38M |
| Merewether investment management, lp | 268.40K | 0.49% | 268.40K | $20.68M |
Sold Out
| Holder | Change |
|---|---|
| Abound wealth management | -1.00 |
| Tfc financial management | -1.00 |
| Advisornet financial | -1.00 |
| Financial management professionals | -2.00 |
| Tfo-tdc | -2.00 |
Institutional Ownership Trends
| Date | Holdings | Change % | Shares | Change % | Ownership | Change % | Increased Position | Change % | Decreased Position | Change % |
|---|---|---|---|---|---|---|---|---|---|---|
| Sep 30, 2025 | 299 | -6.56% | 40,470,785 | 2.90% | 31 | 3.36% | 149 | -13.87% | 101 | -2.88% |
| Jun 30, 2025 | 318 | -12.40% | 39,289,982 | 9.39% | 30 | 3.91% | 172 | -10.88% | 104 | -7.96% |
| Mar 31, 2025 | 360 | -6.98% | 35,844,546 | 1.79% | 27 | 3.73% | 191 | -0.52% | 113 | -12.40% |
| Dec 31, 2024 | 190 | -54.33% | 15,823,842 | -52.43% | 12 | 1.84% | 85 | -60.65% | 66 | -45.45% |
| Sep 30, 2024 | 412 | 5.10% | 33,223,108 | -1.86% | 25 | 3.71% | 213 | 11.52% | 120 | -9.77% |
Top Mutual Funds Shareholders
| Holder | Shares | % Holding | Change |
|---|---|---|---|
| Sycamore Mid Cap Value Comp | 2.83M | 2.20% | 2.75M |
| Victory Sycamore Established Value R | 2.69M | 2.09% | -145.00K |
| Capital Group Fundamental Invtrs Comp | 1.27M | 0.99% | -3.48K |
| American Funds Fundamental Invs A | 1.27M | 0.99% | -3.48K |
| Vanguard US Total Market Shares ETF | 1.23M | 0.96% | 1.02K |
| T. Rowe Price Mid-Cap Value | 1.22M | 0.95% | 1.22M |
| iShares Core S&P Mid-Cap ETF | 1.09M | 0.85% | - |
| Vanguard Total Stock Mkt Idx Inv | 1.00M | 0.78% | -21.55K |
| Global X US Infrastructure Dev ETF | 806.27K | 0.63% | 440.00 |
| Vanguard Small Cap Index | 778.20K | 0.61% | -4.75K |
Recent Insider Transactions
| Date | Name | Role | Activity | Value |
|---|---|---|---|---|
| May 27, 2025 | Buesinger Robert F. | EVP, PEM Segment Head | Sell | $6.03K |
| Apr 22, 2025 | Buesinger Robert F. | EVP, PEM Segment Head | Buy | $7.75K |
| Nov 29, 2024 | Chao David Tsung-Hung | - | Sell | $225.89K |
| Nov 22, 2024 | Chao David Tsung-Hung | - | Sell | $227.50K |
| May 09, 2024 | Buesinger Robert F. | EVP, HIP, IT & Digital | Sell | $554.75K |
Insider Transactions Trends
| Date | Buy | Sell |
|---|---|---|
| 2025 Q4 | - | - |
| 2025 Q3 | - | - |
| 2025 Q2 | 1 | 1 |
| 2025 Q1 | - | - |
| 2024 Q4 | - | 2 |
WLK Ownership FAQ
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