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Data as of 2026-09-29
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Westlake Corp (WLK): Congress and insider trades

Who in Congress and inside the company traded WLK, when each filing appeared, and what buying after each one would have earned against the S&P 500.

Key Facts

  • Westlake Corp (WLK) is a listed stock on NYSE.
  • 4 members of Congress filed 2 buys and 16 sells of WLK, the latest published 2021-09-23 (23 September 2021).
  • Insiders filed 0 open market buys worth $0 and 3 sells worth $5.4M, the latest filed 2026-08-11 (11 August 2026).
  • Across 1 scored buy, Congress averaged -4.0% against the S&P 500 (SPY) over the 90 days after disclosure, with 0% of them ahead of the index. That result is too few trades to tell.
  • Data as of 2026-09-29 (29 September 2026).
Congress buys 2 4 members
Congress sells 16
Insider buys 0 $0
Insider sells 3 $5.4M
Congress buys vs S&P, 90d -4.0% 1 scored buys
Insider buys vs S&P, 90d n/a 0 scored buys

Congress trades in WLK

as of 2021-09-23
  1. Diana Harshbarger13 trades
  2. Susie Lee3 trades
  3. Ro Khanna1 trade
  4. Peter Meijer1 trade
Congress trades in WLK, newest first.
FiledMemberTypeSizeDays to file90 day vs S&P
23 Sep 2021 Diana Harshbarger (R-TN) sell 1K–15K 26 n/a
16 Sep 2021 Ro Khanna (D-CA) sell 15K–50K 29 n/a
28 Aug 2021 Diana Harshbarger (R-TN) sell 1K–15K 163 n/a
28 Aug 2021 Diana Harshbarger (R-TN) sell 1K–15K 169 n/a
28 Aug 2021 Diana Harshbarger (R-TN) sell 1K–15K 169 n/a
28 Aug 2021 Diana Harshbarger (R-TN) sell 1K–15K 163 n/a
28 Aug 2021 Diana Harshbarger (R-TN) sell 1K–15K 163 n/a
28 Aug 2021 Diana Harshbarger (R-TN) sell 1K–15K 169 n/a
17 Aug 2021 Diana Harshbarger (R-TN) sell 1K–15K 152 n/a
17 Aug 2021 Diana Harshbarger (R-TN) sell 1K–15K 158 n/a
17 Aug 2021 Diana Harshbarger (R-TN) sell 1K–15K 158 n/a
17 Aug 2021 Diana Harshbarger (R-TN) sell 1K–15K 152 n/a
17 Aug 2021 Diana Harshbarger (R-TN) sell 1K–15K 158 n/a
17 Aug 2021 Diana Harshbarger (R-TN) sell 1K–15K 152 n/a
14 Jul 2021 Susie Lee (D-NV) sell 1K–15K 33 n/a
17 Mar 2021 Peter Meijer (R-MI) sell 1K–15K 28 n/a
12 Jan 2021 Susie Lee (D-NV) buy 1K–15K 26 -4.0%
12 Jan 2021 Susie Lee (D-NV) buy 1K–15K 32 -4.0%

Insider trades in WLK

as of 2026-08-11
Open market insider trades in WLK, newest first.
FiledInsiderTypeSharesPriceValue90 day vs S&P
11 Aug 2026 Chao Albert sell 38,873 $80.28 $3.1M n/a
31 Mar 2026 Buesinger Robert F. sell 4,000 $115.25 $461K n/a
30 Mar 2026 Bender Mark Steven sell 16,413 $112.53 $1.8M n/a

Frequently asked questions

Who has bought WLK?

2 Congress buys by 4 members and 0 insider buys are on file. The tables on this page list every one.

Did buying WLK after a disclosure beat the market?

Across 1 scored buy, Congress averaged -4.0% against the S&P 500 (SPY) over the 90 days after disclosure, with 0% of them ahead of the index. That result is too few trades to tell. A single stock is a small sample.

Sources: Congressional trades: STOCK Act disclosures, collected from CapitolTrades. Insider trades: SEC Form 4 filings, collected from Finviz. Prices: Yahoo Finance daily adjusted closes. Data as of 2026-09-29 (29 September 2026). About these sources.

Not investment advice. Past disclosed trades do not predict future returns. Disclosures are published late, so the trades shown are ones you could only have copied after the fact. Talk to a licensed adviser before you invest.