Companies / Westlake Corp
Westlake Corp
Financials · FY2025
Ownership
127.8M shares outstanding · as of Jul 29, 2026
Ownership
| Insiders | 0.68% | 869,974 |
| Institutions | 35.54% | 45,417,702 |
| Public float | 63.78% | 81,508,872 |
% of common shares outstanding (exact, from the latest cover-page filing). Institutions are quarterly 13F snapshots; insiders reflect current officers & directors.
Insiders 12
View all →| Insider | % of shares | Shares |
|---|---|---|
Chao AlbertExecutive Chairman · Director | 0.50% | 642,880 |
Ederington L. BenjaminEVP, Legal & External Affairs | 0.06% | 80,158 |
Chao JamesSenior Chairman · Director | 0.04% | 49,774 |
Bender Mark StevenEVP & CFO | 0.03% | 35,895 |
Buesinger Robert F.EVP, PEM Segment Head | 0.03% | 34,482 |
Szwejbka Scott ThomasSVP, HIP Segment Head | 0.01% | 13,773 |
Chao John Tsung-chenDirector | <0.01% | 7,888 |
Holy Jeffrey AdamVP and CAO | <0.01% | 5,124 |
Baksht JonathanSVP and CFO | — | — |
Gilson Jean-MarcCEOPresident and CEO | — | — |
Institutional holders 319
View all →| Holder | Value | % of shares |
|---|---|---|
| $324.35M | 3.43% | |
| $312.08M | 3.30% | |
| $289.65M | 3.07% | |
| $240.47M | 2.58% | |
| $215.26M | 1.44% | |
| $160.55M | 1.70% | |
| $139.43M | 1.48% | |
| $106.10M | 1.14% | |
| $90.25M | 0.96% | |
| $71.78M | 0.48% |
Activity
InsidersInstitutions
What insiders are doing in this stock (Form 4).| Date | Actor | Action | Security | Value | Shares Δ | Position after | Impact |
|---|---|---|---|---|---|---|---|
| Mar 27, 2026 | Bender Mark Steven Executive | Sell | Common Stock | $1.85M | -16K -36.94% | 28,015 0.02% of shares | medium |
| Feb 27, 2026 | Bender Mark Steven Executive | Sell | Common Stock | $1.71M | -17K -27.47% | 44,854 0.04% of shares | medium |
| Feb 27, 2026 | Bender Mark Steven Executive | Other | Common Stock | $1.25M | -13K -17.03% | 61,842 0.05% of shares | low |
| Feb 27, 2026 | Bender Mark Steven Executive | Exercise | Common Stock | $562.0K | +6K +9.54% | 74,535 0.06% of shares | low |
| May 13, 2026 | Bender Mark Steven Executive | Other | Common Stock | $514.3K | -5K -12.83% | 35,895 0.03% of shares | low |
| Feb 18, 2026 | Chao Albert Executive | Other | Common Stock | $503.6K | -5K -0.79% | 639,188 0.50% of shares | low |
| Mar 27, 2026 | Buesinger Robert F. Executive | Sell | Common Stock | $461.0K | -4K -10.39% | 34,482 0.03% of shares | medium |
| Feb 27, 2026 | Bender Mark Steven Executive | Exercise | Common Stock | $408.0K | +6K +10.02% | 68,041 0.05% of shares | low |
Securities
via CUSIP / OpenFIGI
| Symbol | Type | CUSIP |
|---|---|---|
| WLK | Common Stock | 960413102 |