WLK
Westlake CorporationMarquee-fund ownership over time
This quarter's activity
New positions opened
Positions exited
Current holders
Sorted by tenure (longest first)| Fund | First disclosed | Held | Entry price | Latest close | Return on entry |
|---|---|---|---|---|---|
| Duquesne Family Office re-entered | Q3 2022 | 16Q | $98 | $91 | -7% |
| Citadel Advisors | Q3 2024(8Q snapshot) | 7Q | $139 | $91 | -34% |
| AQR Capital Management | Q3 2024(8Q snapshot) | 7Q | $139 | $91 | -34% |
| Millennium Management | Q3 2024(8Q snapshot) | 7Q | $139 | $91 | -34% |
| D.E. Shaw | Q4 2024(8Q snapshot) | 6Q | $122 | $91 | -25% |
“Return on entry” is the price-only move from the fund's first disclosure to today — it ignores any adds, trims, or dividends. A fund that built its position over multiple quarters has a true cost basis somewhere between entry price and latest close; this figure is the upper bound.
Past holders
Funds that exited at some point| Fund | Last entry | Exited | Entry → Exit | Return |
|---|---|---|---|---|
| Two Sigma Investments | Q3 2024 | Q2 2026 | → $89 | -36% |
| Point72 Asset Management 2× in & out | Q4 2025 | Q1 2026 | → $97 | +58% |
| Renaissance Technologies | Q3 2024 | Q1 2026 | → $98 | -30% |
| Bridgewater Associates 6× in & out | Q3 2024 | Q4 2024 | → $123 | -11% |
| Maverick Capital 3× in & out | Q4 2021 | Q2 2022 | → $122 | +28% |
Insider activity
Form 4 — officers, directors, 10%+ ownersFiled within two business days of each transaction by anyone with material insider status at WESTLAKE CORP. Pair with the holders table above as a sanity check: heavy insider buying alongside marquee-fund accumulation is the strongest accumulation signal; heavy insider selling alongside fund exits is the strongest distribution signal.
30d / 90d windows measured from May 14, 2026 — the most recent Form 4 on file — not from today.
- Form 40001193125-26-223323May 14, 2026
- Form 40002126961-26-000004Apr 6, 2026
- Form 40001193125-26-133508Mar 31, 2026
- Form 40001193125-26-131706Mar 30, 2026
- Form 4/Aamend0001193125-26-096289Mar 6, 2026
- Form 40001193125-26-084672Mar 2, 2026
- Form 40001193125-26-065177Feb 24, 2026
- Form 40001193125-26-063707Feb 23, 2026
- Form 40001193125-26-063705Feb 23, 2026
- Form 40001193125-26-063701Feb 23, 2026
- Form 40001193125-26-063700Feb 23, 2026
- Form 40001193125-26-063688Feb 23, 2026
- Form 40001193125-26-063686Feb 23, 2026
- Form 40001193125-26-063669Feb 23, 2026
- Form 40001193125-26-063663Feb 23, 2026
Fundamentals
XBRL · Westlake CorporationAnnual figures sourced directly from Westlake Corporation's 10-K / 10-Q filings via SEC EDGAR XBRL. Latest fiscal year and the year-over-year change, with up to ten years of history.
Recent SEC filings
10-K · 10-Q · 8-K · 13D/G · proxyThe most recent material filings for WESTLAKE CORP — earnings, material events, ownership disclosures, proxy statements. Form 4 insider activity is shown in the panel above.
- 8-KMaterial eventMay 18, 2026
- 10-QQuarterly reportMay 6, 2026
- 8-KMaterial eventMay 5, 2026
- 8-KMaterial eventMay 1, 2026
- 8-KMaterial eventApr 20, 2026
- 8-KMaterial eventApr 14, 2026
- 8-KMaterial eventApr 6, 2026
- 8-KMaterial eventApr 2, 2026
- DEF 14AProxy statementApr 2, 2026
- 10-KAnnual reportFeb 26, 2026
- 8-KMaterial eventFeb 24, 2026
- 8-KMaterial eventFeb 23, 2026
- 8-KMaterial eventJan 6, 2026
- 8-KMaterial eventDec 15, 2025
- 8-KMaterial eventNov 12, 2025
Trade history
Every open→close lifecycle across tracked funds| Fund | Open date | Close date | Open price | Close price / current | Return |
|---|---|---|---|---|---|
| Duquesne Family Office | Q2 2026 | open | $89 | $91 | +3% |
| Point72 Asset Management | Q4 2025 | Q1 2026 | $62 | $97 | +58% |
| D.E. Shaw | Q4 2024 | open | $122 | $91 | -25% |
| Bridgewater Associates | Q3 2024 | Q4 2024 | $138 | $123 | -11% |
| Citadel Advisors | Q3 2024 | open | $139 | $91 | -34% |
| Two Sigma Investments | Q3 2024 | Q2 2026 | $139 | $89 | -36% |
| AQR Capital Management | Q3 2024 | open | $139 | $91 | -34% |
| Millennium Management | Q3 2024 | open | $139 | $91 | -34% |
| Point72 Asset Management | Q3 2024 | Q1 2025 | $139 | $112 | -20% |
| Renaissance Technologies | Q3 2024 | Q1 2026 | $140 | $98 | -30% |
| Duquesne Family Office | Q3 2022 | Q4 2022 | $98 | $104 | +6% |
| Maverick Capital | Q4 2021 | Q2 2022 | $95 | $122 | +28% |
| Bridgewater Associates | Q3 2020 | Q2 2021 | $55 | $95 | +73% |
| Maverick Capital | Q3 2019 | Q2 2020 | $54 | $35 | -36% |
| Bridgewater Associates | Q2 2019 | Q2 2020 | $53 | $36 | -33% |
| Maverick Capital | Q2 2018 | Q3 2018 | $104 | $86 | -18% |
| Bridgewater Associates | Q4 2015 | Q1 2016 | $49 | $36 | -26% |
| Bridgewater Associates | Q2 2015 | Q3 2015 | $59 | $52 | -11% |
| Bridgewater Associates | Q4 2014 | Q1 2015 | $57 | $54 | -6% |
- Covers only the 27 marquee funds tracked here, not the full institutional universe. A “0 holders” reading does not mean unowned.
- Heavy funds (Renaissance Technologies, Citadel Advisors, Soros Fund Management, Two Sigma Investments, D.E. Shaw, AQR Capital Management, Millennium Management, Point72 Asset Management) use 8-quarter snapshots, so their pre-2024 history is missing.
- “Current” reflects each fund's most recent 13F — filings lag the actual trade by up to 45 days; positions shown may have changed since.
- Cost = price at the entry filing date. Re-entered positions show the most recent open lot.
- Options, ADRs, and unmapped CUSIPs are excluded from the follower-backtest pipeline that produces these snapshots, so certain holding types won't appear here.