MarketPeel
Insider Trading Intelligence
Pricing
…
JC

James Chao

WLK
CHAIRMAN · WESTLAKE CORP · CIK 0001299505
FILING MIX · LIFETIME44%/56%
BUYS
43
SELLS
54
TOTAL VALUE
$78.25M
COMPANIES
2
ACTIVE SINCE
Feb 2020
HOLDINGS NOW
27,382
AVG SELL PX
$117.28
TRADE KIND
SHOWING 97 / 97
Trades · vs SPY
Loading price series…
Performance · forward returns vs SPY
5 backtested trades · 8 horizons · 3 pendingHow are these numbers computed? →
Forward-return performance of every backtestable P/S trade by James Chao, measured at 8 horizons from 7 days to 2 years. Deduped per economic event so co-filings count once. Excess return = trade return minus SPY return over the same window.
HORIZONTRADESWIN RATEINSIDER RETURNSPY RETURNMEAN EXCESSMEDIAN EXCESST-STAT
7d5+0.00%+1.60%+0.82%+0.78%+0.04%—
14d5+40.00%-0.57%-2.45%+1.88%-0.88%—
30d5+40.00%-1.95%-0.83%-1.12%-2.05%—
60d5+80.00%-1.91%+4.90%-6.81%-7.59%—
90d5+60.00%-1.35%+4.78%-6.13%-8.73%—
180d5+100.00%-14.29%+6.94%-21.22%-29.37%—
1y5+40.00%-4.50%+10.46%-19.89%-18.59%—
2y5(3 pending)+100.00%-12.51%+30.57%-43.08%-43.08%—
How to read this: Insider Returnis the average raw return of the filer's trades over the horizon. SPY Return is what SPY did over those same windows — reference only, not a comparison. The headline alpha number is Mean Excess = Insider − SPY; green means the filer beat SPY, red means they trailed it. Win rate is the share of individual trades where the filer beat SPY. T-statvalues above 2 mean the alpha is unlikely to be chance given the sample size. "Pending" counts trades where the horizon hasn't elapsed yet; their stats are not included in the row average.
Holdings over time
WLK · 27,382 shares · as of Feb 20, 2026
091,308182,616273,923365,231202120222023202420252026SHARES HELD
Trading cadence · quarterly flow
BUY ● SELL ●
2020
2020
2020
2020
2021
2021
2021
2021
2022
2022
2022
2022
2023
2023
2023
2023
2024
2024
2024
2024
2025
2025
2025
2025
2026
FLOW · 43 buys / 54 sellsCOVERAGE · 25 quarters
Form 4 filings · all activity
COMPANYTYPESHARESPRICEVALUEHELD AFTERTRADE DATEFILEDDETAILS
WLK
WESTLAKE CORP
SALE
Senior Chairman
1,569$94.10$147.6K49,774Feb 20, 2026Feb 23, 2026 ↗View →
WLK
WESTLAKE CORP
PURCHASEGRANT
Stock grant
7,472——7,472Feb 20, 2026Feb 23, 2026 ↗View →
WLK
WESTLAKE CORP
PURCHASEGRANT
Stock grant
27,382——27,382Feb 20, 2026Feb 23, 2026 ↗View →
WLK
WESTLAKE CORP
PURCHASEGRANT
Stock grant
3,884——51,343Feb 19, 2026Feb 23, 2026 ↗View →
WLK
WESTLAKE CORP
SALE
Senior Chairman
2,664$98.95$263.6K47,459Feb 18, 2026Feb 19, 2026 ↗View →
WLK
WESTLAKE CORP
SALE
Senior Chairman
10,382——0Feb 17, 2026Feb 19, 2026 ↗View →
WLK
WESTLAKE CORP
PURCHASE
Senior Chairman
10,382——50,123Feb 17, 2026Feb 19, 2026 ↗View →
WLK
WESTLAKE CORP
SALEGRANT
Gift
15,140——39,741Aug 28, 2025Aug 29, 2025 ↗View →
WLKP
WESTLAKE CHEMICAL PARTNERS LP
SALE
Senior Chairman
3,700$22.10$81.8K0May 29, 2025May 30, 2025 ↗View →
WLKP
WESTLAKE CHEMICAL PARTNERS LP
SALE
Senior Chairman
4,600$22.10$101.7K3,700May 28, 2025May 29, 2025 ↗View →
WLKP
WESTLAKE CHEMICAL PARTNERS LP
SALE
Senior Chairman
5,608$22.17$124.3K8,300May 27, 2025May 29, 2025 ↗View →
WLK
WESTLAKE CORP
PURCHASEGRANT
Stock grant
12,322——12,322Feb 21, 2025Feb 24, 2025 ↗View →
WLK
WESTLAKE CORP
PURCHASEGRANT
Stock grant
37,172——37,172Feb 21, 2025Feb 24, 2025 ↗View →
WLK
WESTLAKE CORP
SALE
Senior Chairman
6,554$110.54$724.5K54,881Feb 21, 2025Feb 24, 2025 ↗View →
WLK
WESTLAKE CORP
PURCHASEGRANT
Stock grant
16,375——61,435Feb 20, 2025Feb 24, 2025 ↗View →
WLK
WESTLAKE CORP
SALE
Senior Chairman
2,193$111.46$244.4K45,154Feb 19, 2025Feb 20, 2025 ↗View →
WLK
WESTLAKE CORP
SALE
Senior Chairman
94$112.76$10.6K45,060Feb 19, 2025Feb 20, 2025 ↗View →
WLK
WESTLAKE CORP
SALE
Senior Chairman
8,796——0Feb 18, 2025Feb 20, 2025 ↗View →
WLK
WESTLAKE CORP
PURCHASE
Senior Chairman
8,796——47,347Feb 18, 2025Feb 20, 2025 ↗View →
WLK
WESTLAKE CORP
SALEGRANT
Gift
6,642——38,551Aug 30, 2024Sep 3, 2024 ↗View →
WLK
WESTLAKE CORP
SALEGRANT
Gift
36,632——45,193Mar 28, 2024Apr 1, 2024 ↗View →
WLK
WESTLAKE CORP
SALE
Chairman
1,153$136.97$157.9K81,825Feb 20, 2024Feb 21, 2024 ↗View →
WLK
WESTLAKE CORP
SALE
Chairman
11,799$129.92$1.53M82,988Feb 20, 2024Feb 21, 2024 ↗View →
WLK
WESTLAKE CORP
SALE
Chairman
10$135.43$1.4K82,978Feb 20, 2024Feb 21, 2024 ↗View →
WLK
WESTLAKE CORP
PURCHASE
Chairman
10,774——94,787Feb 19, 2024Feb 21, 2024 ↗View →
WLK
WESTLAKE CORP
SALE
Chairman
10,774——0Feb 19, 2024Feb 21, 2024 ↗View →
WLK
WESTLAKE CORP
PURCHASEGRANT
Stock grant
9,118——9,118Feb 16, 2024Feb 20, 2024 ↗View →
WLK
WESTLAKE CORP
PURCHASEGRANT
Stock grant
25,242——25,242Feb 16, 2024Feb 20, 2024 ↗View →
WLK
WESTLAKE CORP
PURCHASEGRANT
Stock grant
21,614——84,013Feb 16, 2024Feb 21, 2024 ↗View →
WLK
WESTLAKE CORP
SALE
Chairman
9,177——18,633Nov 30, 2023Dec 1, 2023 ↗View →
WLK
WESTLAKE CORP
SALE
Chairman
34,559——0Nov 30, 2023Dec 1, 2023 ↗View →
WLK
WESTLAKE CORP
PURCHASE
Chairman
24,437$86.54$2.11M121,435Nov 30, 2023Dec 1, 2023 ↗View →
WLK
WESTLAKE CORP
SALE
Chairman
57,232$128.37$7.35M73,380Nov 30, 2023Dec 1, 2023 ↗View →
WLK
WESTLAKE CORP
PURCHASE
Chairman
9,177$108.12$992.2K130,612Nov 30, 2023Dec 1, 2023 ↗View →
WLK
WESTLAKE CORP
SALE
Chairman
24,437——12,589Nov 30, 2023Dec 1, 2023 ↗View →
WLK
WESTLAKE CORP
SALE
Chairman
10,981$129.14$1.42M62,399Nov 30, 2023Dec 1, 2023 ↗View →
WLK
WESTLAKE CORP
PURCHASE
Chairman
34,599$65.81$2.28M96,998Nov 30, 2023Dec 1, 2023 ↗View →
WLK
WESTLAKE CORP
SALE
Chairman
35,321——0Aug 31, 2023Sep 1, 2023 ↗View →
WLK
WESTLAKE CORP
SALE
Chairman
17,998$132.48$2.38M120,640Aug 31, 2023Sep 1, 2023 ↗View →
WLK
WESTLAKE CORP
SALE
Chairman
47,569——0Aug 31, 2023Sep 1, 2023 ↗View →
WLK
WESTLAKE CORP
PURCHASE
Chairman
47,569$44.42$2.11M168,209Aug 31, 2023Sep 1, 2023 ↗View →
WLK
WESTLAKE CORP
SALE
Chairman
55,766——0Aug 31, 2023Sep 1, 2023 ↗View →
WLK
WESTLAKE CORP
PURCHASE
Chairman
35,321$107.75$3.81M265,727Aug 31, 2023Sep 1, 2023 ↗View →
WLK
WESTLAKE CORP
PURCHASE
Chairman
55,766$79.83$4.45M321,493Aug 31, 2023Sep 1, 2023 ↗View →
WLK
WESTLAKE CORP
PURCHASE
Chairman
62,197$61.87$3.85M230,406Aug 31, 2023Sep 1, 2023 ↗View →
WLK
WESTLAKE CORP
SALE
Chairman
43,738——34,599Aug 31, 2023Sep 1, 2023 ↗View →
WLK
WESTLAKE CORP
SALE
Chairman
226,593$131.15$29.72M138,638Aug 31, 2023Sep 1, 2023 ↗View →
WLK
WESTLAKE CORP
SALEGRANT
Gift
58,268——62,372Aug 31, 2023Sep 1, 2023 ↗View →
WLK
WESTLAKE CORP
PURCHASE
Chairman
43,738$65.81$2.88M365,231Aug 31, 2023Sep 1, 2023 ↗View →
WLK
WESTLAKE CORP
SALE
Chairman
62,197——0Aug 31, 2023Sep 1, 2023 ↗View →
WLK
WESTLAKE CORP
PURCHASE
Chairman
12,321——0Aug 30, 2023Aug 31, 2023 ↗View →
WLK
WESTLAKE CORP
SALE
Chairman
30,056$133.70$4.02M120,640Aug 30, 2023Aug 31, 2023 ↗View →
WLK
WESTLAKE CORP
PURCHASE
Chairman
17,735——47,569Aug 30, 2023Aug 31, 2023 ↗View →
WLK
WESTLAKE CORP
PURCHASE
Chairman
12,321$68.09$838.9K132,961Aug 30, 2023Aug 31, 2023 ↗View →
WLK
WESTLAKE CORP
PURCHASE
Chairman
17,735$44.42$787.8K150,696Aug 30, 2023Aug 31, 2023 ↗View →
WLK
WESTLAKE CORP
SALE
Chairman
14,836$104.32$1.55M121,429Mar 13, 2023Mar 15, 2023 ↗View →
WLK
WESTLAKE CORP
SALE
Chairman
789$105.13$82.9K120,640Mar 13, 2023Mar 15, 2023 ↗View →
WLK
WESTLAKE CORP
PURCHASEGRANT
Stock grant
37,150——136,265Feb 17, 2023Mar 15, 2023 ↗View →
WLK
WESTLAKE CORP
PURCHASEGRANT
Stock grant
37,150——136,265Feb 17, 2023Feb 17, 2023 ↗View →
WLK
WESTLAKE CORP
PURCHASEGRANT
Stock grant
10,382——10,382Feb 17, 2023Feb 21, 2023 ↗View →
WLK
WESTLAKE CORP
PURCHASEGRANT
Stock grant
28,344——28,344Feb 17, 2023Feb 21, 2023 ↗View →
WLK
WESTLAKE CORP
SALE
Chairman
6,074$121.86$740.2K99,200Feb 15, 2023Feb 16, 2023 ↗View →
WLK
WESTLAKE CORP
SALE
Chairman
85$122.45$10.4K99,115Feb 15, 2023Feb 16, 2023 ↗View →
WLK
WESTLAKE CORP
PURCHASE
Chairman
18,519——105,274Feb 14, 2023Feb 16, 2023 ↗View →
WLK
WESTLAKE CORP
SALE
Chairman
18,519——0Feb 14, 2023Feb 16, 2023 ↗View →
WLKP
WESTLAKE CHEMICAL PARTNERS LP
SALEGRANT
Gift
10,000——13,908Jun 9, 2022Jun 13, 2022 ↗View →
WLK
WESTLAKE CORP
SALEGRANT
Gift
38,836——86,755Jun 2, 2022Jun 2, 2022 ↗View →
WLKP
WESTLAKE CHEMICAL PARTNERS LP
SALE
Chairman
29,092$26.87$781.6K25,908May 31, 2022Jun 1, 2022 ↗View →
WLKP
WESTLAKE CHEMICAL PARTNERS LP
SALE
Chairman
2,000$27.54$55.1K23,908May 31, 2022Jun 1, 2022 ↗View →
WLK
WESTLAKE CORP
SALE
Chairman
9,710$118.51$1.15M125,591Mar 14, 2022Mar 15, 2022 ↗View →
WLK
WESTLAKE CORP
PURCHASEGRANT
Stock grant
24,462——135,302Feb 18, 2022Feb 22, 2022 ↗View →
WLK
WESTLAKE CORP
PURCHASEGRANT
Stock grant
8,796——8,796Feb 18, 2022Feb 22, 2022 ↗View →
WLK
WESTLAKE CORP
PURCHASEGRANT
Stock grant
27,810——27,810Feb 18, 2022Feb 22, 2022 ↗View →
WLK
WESTLAKE CORP
PURCHASEGRANT
Stock grant
24,461——135,301Feb 18, 2022Mar 15, 2022 ↗View →
WLK
WESTLAKE CORP
SALE
Chairman
27$105.97$2.9K110,860Feb 16, 2022Feb 17, 2022 ↗View →
WLK
WESTLAKE CORP
SALE
Chairman
4,308$104.96$452.2K110,887Feb 16, 2022Feb 17, 2022 ↗View →
WLK
WESTLAKE CORP
SALE
Chairman
20$106.18$2.1K110,840Feb 16, 2022Feb 17, 2022 ↗View →
WLK
WESTLAKE CORP
SALE
Chairman
14,683——0Feb 15, 2022Feb 17, 2022 ↗View →
WLK
WESTLAKE CORP
PURCHASE
Chairman
14,683——115,195Feb 15, 2022Feb 17, 2022 ↗View →
WLK
WESTLAKE CORP
PURCHASE
Chairman
16,420$30.05$493.5K100,512Dec 2, 2021Dec 3, 2021 ↗View →
WLK
WESTLAKE CORP
SALE
Chairman
16,420——0Dec 2, 2021Dec 3, 2021 ↗View →
WLK
WESTLAKE CORP
PURCHASEGRANT
Stock grant
10,774——10,774Feb 19, 2021Feb 22, 2021 ↗View →
WLK
WESTLAKE CORP
PURCHASEGRANT
Stock grant
37,026——37,026Feb 19, 2021Feb 22, 2021 ↗View →
WLK
WESTLAKE CORP
SALE
Chairman
2,537$85.08$215.9K84,092Feb 18, 2021Feb 18, 2021 ↗View →
WLK
WESTLAKE CORP
SALE
Chairman
784$85.73$67.2K77,157Feb 16, 2021Feb 17, 2021 ↗View →
WLK
WESTLAKE CORP
SALE
Chairman
8$87.70$70277,149Feb 16, 2021Feb 17, 2021 ↗View →
WLK
WESTLAKE CORP
PURCHASE
Chairman
9,480——86,629Feb 16, 2021Feb 18, 2021 ↗View →
WLK
WESTLAKE CORP
SALE
Chairman
9,480——0Feb 16, 2021Feb 18, 2021 ↗View →
WLK
WESTLAKE CORP
PURCHASE
Chairman
3,072——77,941Feb 14, 2021Feb 17, 2021 ↗View →
WLK
WESTLAKE CORP
SALE
Chairman
3,072——0Feb 14, 2021Feb 17, 2021 ↗View →
WLK
WESTLAKE CORP
SALE
Chairman
273$61.47$16.8K74,869Feb 18, 2020Feb 19, 2020 ↗View →
WLK
WESTLAKE CORP
SALE
Chairman
4,103$60.50$248.2K75,142Feb 18, 2020Feb 19, 2020 ↗View →
WLK
WESTLAKE CORP
PURCHASE
Chairman
15,922——79,245Feb 17, 2020Feb 19, 2020 ↗View →
WLK
WESTLAKE CORP
SALE
Chairman
15,922——0Feb 17, 2020Feb 19, 2020 ↗View →
WLK
WESTLAKE CORP
PURCHASEGRANT
Stock grant
3,072——3,072Feb 14, 2020Feb 18, 2020 ↗View →
WLK
WESTLAKE CORP
PURCHASEGRANT
Stock grant
78,337——78,337Feb 14, 2020Feb 18, 2020 ↗View →
WLK
WESTLAKE CORP
PURCHASEGRANT
Stock grant
18,519——18,519Feb 14, 2020Feb 18, 2020 ↗View →
Other insiders · WLK
Loading peer insiders…
About this filer
CIK 0001299505
ROLE
Chairman
PRIMARY
WLK
COMPANIES
2
ACTIVE SINCE
Feb 2020
MARKETPEEL · /INSIDER/0001299505DATA · SEC EDGAR · FORM 4 · CONSOLIDATED TAPE
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