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Joel Greenblatt's Westlake Corporation (WLK) position

Yes: as of Q1 2026, Joel Greenblatt holds 35K shares of WLK worth $4.0M (0.0% of the disclosed portfolio). Held since at least Q1 2021; that opening coverage snapshot is not counted as a purchase.
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Current value
$4.0M
Shares held
35K
% of portfolio
0.0%
Est. average buy price (i)
$95.30
est. since Q1 2021
Quarter-end price
$116.82

Estimated trade prices

Average price in quarters with purchases
$102.34
Average prices in quarters with sales
  • Q4 2025: $71.17 (13K shares sold)
  • Q4 2024: $130.12 (3K shares sold)
  • Q3 2024: $143.86 (11K shares sold)
  • Q2 2024: $153.58 (1K shares sold)
  • Q4 2023: $126.94 (6K shares sold)
  • Q3 2023: $128.34 (34K shares sold)
  • Q4 2022: $100.74 (440 shares sold)
  • Q2 2022: $122.47 (1K shares sold)
  • Q1 2022: $109.04 (19K shares sold)
  • Q3 2021: $85.64 (4K shares sold)

WLK price vs Greenblatt's position

1Y 3Y 5Y MAX
Dates
$50$100$150$20020222023202420252026Sold 4K shares (17.1%) · Q3 2021. Average closing price $85.64 · Price range $78.98–$93.554KsharessoldAdded 4K shares (21.0%) · Q4 2021. Average closing price $97.50 · Price range $88.62–$104.514KsharespurchasedSold 19K shares (79.8%) · Q1 2022. Average closing price $109.04 · Price range $96.43–$127.2019KsharessoldSold 1K shares (26.6%) · Q2 2022. Average closing price $122.47 · Price range $94.83–$140.331KsharessoldAdded 11K shares (313.8%) · Q3 2022. Average closing price $95.90 · Price range $81.75–$110.0211KsharespurchasedSold 440 shares (2.9%) · Q4 2022. Average closing price $100.74 · Price range $88.00–$113.37440sharessoldAdded 6K shares (44.3%) · Q1 2023. Average closing price $115.40 · Price range $99.03–$124.986KsharespurchasedAdded 34K shares (163.3%) · Q2 2023. Average closing price $114.41 · Price range $103.95–$121.2934KsharespurchasedSold 34K shares (62.2%) · Q3 2023. Average closing price $128.34 · Price range $116.44–$137.5034KsharessoldSold 6K shares (29.8%) · Q4 2023. Average closing price $126.94 · Price range $113.19–$142.696KsharessoldAdded 4K shares (28.6%) · Q1 2024. Average closing price $140.79 · Price range $132.81–$152.804KsharespurchasedSold 1K shares (5.7%) · Q2 2024. Average closing price $153.58 · Price range $144.82–$162.061KsharessoldSold 11K shares (62.4%) · Q3 2024. Average closing price $143.86 · Price range $133.50–$150.9711KsharessoldSold 3K shares (39.0%) · Q4 2024. Average closing price $130.12 · Price range $113.23–$149.133KsharessoldAdded 1K shares (33.3%) · Q1 2025. Average closing price $110.75 · Price range $99.12–$119.161KsharespurchasedAdded 7K shares (122.4%) · Q2 2025. Average closing price $81.83 · Price range $69.83–$102.017KsharespurchasedAdded 10K shares (82.7%) · Q3 2025. Average closing price $83.37 · Price range $75.43–$90.6010KsharespurchasedSold 13K shares (58.3%) · Q4 2025. Average closing price $71.17 · Price range $56.38–$82.3713KsharessoldAdded 25K shares (275.7%) · Q1 2026. Average closing price $96.97 · Price range $74.15–$116.8225Ksharespurchased← Earlier —1 purchase
Average closing price · filing quarter
$96.97
Price range · filing quarter
$74.15 – $116.82
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Every quarterly change

Quarter Action Shares change Est. value change Δ Own Shares held Filing date
Q1 2026 Added +25K +$2.5M +275.7% 35K May 15, 2026
Q4 2025 Reduced −13K −$916K −58.3% 9K Feb 17, 2026
Q3 2025 Added +10K +$833K +82.7% 22K Nov 14, 2025
Q2 2025 Added +7K +$544K +122.4% 12K Aug 14, 2025
Q1 2025 Added +1K +$150K +33.3% 5K May 15, 2025
Q4 2024 Reduced −3K −$339K −39.0% 4K Feb 14, 2025
Q3 2024 Reduced −11K −$1.6M −62.4% 7K Nov 14, 2024
Q2 2024 Reduced −1K −$164K −5.7% 18K Aug 14, 2024
Q1 2024 Added +4K +$588K +28.6% 19K May 15, 2024
Q4 2023 Reduced −6K −$788K −29.8% 15K Feb 14, 2024
Q3 2023 Reduced −34K −$4.4M −62.2% 21K Nov 14, 2023
Q2 2023 Added +34K +$3.9M +163.3% 55K Aug 14, 2023
Q1 2023 Added +6K +$741K +44.3% 21K May 15, 2023
Q4 2022 Reduced −440 −$44K −2.9% 15K Feb 14, 2023
Q3 2022 Added +11K +$1.1M +313.8% 15K Nov 14, 2022
Q2 2022 Reduced −1K −$160K −26.6% 4K Aug 15, 2022
Q1 2022 Reduced −19K −$2.1M −79.8% 5K May 16, 2022
Q4 2021 Added +4K +$412K +21.0% 24K Feb 14, 2022
Q3 2021 Reduced −4K −$356K −17.1% 20K Nov 15, 2021
Q2 2021 Added +22K +$2.1M +844.6% 24K Aug 16, 2021
Q1 2021 First covered – – – 3K May 17, 2021
Data through Q1 2026 · filed May 15, 2026
21 grouped rows from 21 quarters

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Common questions

Does Joel Greenblatt own WLK?

Yes. As of Q1 2026, Joel Greenblatt disclosed 35K shares of WLK, worth $4.0M. All figures come from SEC 13F filings for Q1 2026, the latest disclosed quarter.

When did Joel Greenblatt buy WLK?

Joel Greenblatt held WLK since at least Q1 2021, when this filing coverage begins; the opening snapshot is not a disclosed purchase. All figures come from SEC 13F filings for Q1 2026, the latest disclosed quarter.

Did Joel Greenblatt sell WLK?

The quarter-by-quarter table above shows each sale and reduction Joel Greenblatt disclosed in WLK. All figures come from SEC 13F filings for Q1 2026, the latest disclosed quarter.

How many shares of WLK does Joel Greenblatt own?

Joel Greenblatt disclosed 35K shares of WLK as of Q1 2026. All figures come from SEC 13F filings for Q1 2026, the latest disclosed quarter.

What price did Joel Greenblatt pay for WLK?

Joel Greenblatt began building the WLK position before our 13F history starts, so an exact average buy price cannot be estimated without understating it. All figures come from SEC 13F filings for Q1 2026, the latest disclosed quarter.

How are the estimated trade prices calculated?

13F filings disclose quarter-end holdings, not trade dates or execution prices. These estimates use each covered quarter's average market price; the add average excludes the opening position and quarters without price data. All figures come from SEC 13F filings for Q1 2026, the latest disclosed quarter.