MarketPeel
Insider Trading Intelligence
Pricing
…
RB

Robert F. Buesinger

WLK
EVP, HIP, IT AND DIGITAL · WESTLAKE CORP · CIK 0001488587
FILING MIX · LIFETIME44%/56%
BUYS
50
SELLS
63
TOTAL VALUE
$23.65M
COMPANIES
1
ACTIVE SINCE
Feb 2020
HOLDINGS NOW
34,482
AVG SELL PX
$120.19
TRADE KIND
SHOWING 113 / 113
Trades · vs SPY
Loading price series…
Performance · forward returns vs SPY
15 backtested trades · 8 horizons · 5 pendingHow are these numbers computed? →
Forward-return performance of every backtestable P/S trade by Robert F. Buesinger, 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
7d15+53.33%+0.71%+1.91%-1.20%-1.28%—
14d15+40.00%+0.69%+2.29%-1.60%-0.95%—
30d15+46.67%-3.10%+2.97%-6.07%-4.24%—
60d15+33.33%-0.35%+3.59%-2.41%+0.10%—
90d15+26.67%+1.53%+6.41%-4.89%-0.19%—
180d15(1 pending)+71.43%-4.24%+9.73%-13.97%-16.06%—
1y15(1 pending)+50.00%+3.54%+12.61%-9.07%-2.14%—
2y15(3 pending)+33.33%+7.42%+26.38%-18.96%-0.77%—
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 · 34,482 shares · as of Mar 27, 2026
09,70219,40429,10638,808202120222023202420252026SHARES 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 · 50 buys / 63 sellsCOVERAGE · 25 quarters
Form 4 filings · all activity
COMPANYTYPESHARESPRICEVALUEHELD AFTERTRADE DATEFILEDDETAILS
WLK
WESTLAKE CORP
SALE
EVP, PEM Segment Head
4,000$115.25$461.0K34,482Mar 27, 2026Mar 31, 2026 ↗View →
WLK
WESTLAKE CORP
PURCHASEGRANT
Stock grant
19,351——19,351Feb 20, 2026Feb 23, 2026 ↗View →
WLK
WESTLAKE CORP
PURCHASEGRANT
Stock grant
5,281——5,281Feb 20, 2026Feb 23, 2026 ↗View →
WLK
WESTLAKE CORP
SALE
EVP, PEM Segment Head
326$94.10$30.7K38,482Feb 20, 2026Feb 23, 2026 ↗View →
WLK
WESTLAKE CORP
PURCHASEGRANT
Stock grant
1,301——38,808Feb 19, 2026Feb 23, 2026 ↗View →
WLK
WESTLAKE CORP
SALE
EVP, PEM Segment Head
903$98.95$89.4K37,507Feb 18, 2026Feb 19, 2026 ↗View →
WLK
WESTLAKE CORP
SALE
EVP, PEM Segment Head
3,478——0Feb 17, 2026Feb 19, 2026 ↗View →
WLK
WESTLAKE CORP
PURCHASE
EVP, PEM Segment Head
3,478——38,410Feb 17, 2026Feb 19, 2026 ↗View →
WLK
WESTLAKE CORP
SALE
EVP, PEM Segment Head
83$72.70$6.0K0May 27, 2025Jun 9, 2025 ↗View →
WLK
WESTLAKE CORP
PURCHASE
EVP, PEM Segment Head
83$93.39$7.8K83Apr 22, 2025Jun 9, 2025 ↗View →
WLK
WESTLAKE CORP
PURCHASEGRANT
Stock grant
17,101——17,101Apr 11, 2025Apr 15, 2025 ↗View →
WLK
WESTLAKE CORP
SALE
EVP, HIP, IT & Digital
2,738$110.54$302.7K34,932Feb 21, 2025Feb 24, 2025 ↗View →
WLK
WESTLAKE CORP
PURCHASEGRANT
Stock grant
13,141——13,141Feb 21, 2025Feb 24, 2025 ↗View →
WLK
WESTLAKE CORP
PURCHASEGRANT
Stock grant
4,356——4,356Feb 21, 2025Feb 24, 2025 ↗View →
WLK
WESTLAKE CORP
PURCHASEGRANT
Stock grant
6,839——37,670Feb 20, 2025Feb 24, 2025 ↗View →
WLK
WESTLAKE CORP
SALE
EVP, HIP, IT & Digital
3,851$111.46$429.2K30,995Feb 19, 2025Feb 20, 2025 ↗View →
WLK
WESTLAKE CORP
SALE
EVP, HIP, IT & Digital
164$112.76$18.5K30,831Feb 19, 2025Feb 20, 2025 ↗View →
WLK
WESTLAKE CORP
PURCHASE
EVP, HIP, IT & Digital
12,923——34,846Feb 18, 2025Feb 20, 2025 ↗View →
WLK
WESTLAKE CORP
SALE
EVP, HIP, IT & Digital
12,923——0Feb 18, 2025Feb 20, 2025 ↗View →
WLK
WESTLAKE CORP
SALE
EVP, HIP, IT & Digital
2,772$145.44$403.2K21,923Aug 14, 2024Aug 15, 2024 ↗View →
WLK
WESTLAKE CORP
PURCHASE
EVP, HIP, IT & Digital
7,051——24,695Aug 13, 2024Aug 15, 2024 ↗View →
WLK
WESTLAKE CORP
SALE
EVP, HIP, IT & Digital
7,051——0Aug 13, 2024Aug 15, 2024 ↗View →
WLK
WESTLAKE CORP
SALE
EVP, HIP, IT & Digital
3,500$158.50$554.8K17,644May 9, 2024May 13, 2024 ↗View →
WLK
WESTLAKE CORP
PURCHASE
EVP, HIP, IT & Digital
3,133$122.65$384.3K24,277May 7, 2024May 8, 2024 ↗View →
WLK
WESTLAKE CORP
SALE
EVP, HIP, IT & Digital
3,133$157.50$493.4K21,144May 7, 2024May 8, 2024 ↗View →
WLK
WESTLAKE CORP
SALE
EVP, HIP, IT & Digital
3,133——6,362May 7, 2024May 8, 2024 ↗View →
WLK
WESTLAKE CORP
SALE
EVP, HIP, IT & Digital
3,878$144.50$560.4K21,144Mar 15, 2024Mar 18, 2024 ↗View →
WLK
WESTLAKE CORP
SALE
EVP, HIP, IT & Digital
122$144.50$17.6K25,022Mar 13, 2024Mar 14, 2024 ↗View →
WLK
WESTLAKE CORP
SALE
EVP, HIP, IT & Digital
5,005——0Mar 7, 2024Mar 11, 2024 ↗View →
WLK
WESTLAKE CORP
PURCHASE
EVP, HIP, IT & Digital
7,665$108.12$828.7K37,814Mar 7, 2024Mar 11, 2024 ↗View →
WLK
WESTLAKE CORP
SALE
EVP, HIP, IT & Digital
12,670$142.55$1.81M25,144Mar 7, 2024Mar 11, 2024 ↗View →
WLK
WESTLAKE CORP
PURCHASE
EVP, HIP, IT & Digital
5,005$86.54$433.1K30,149Mar 7, 2024Mar 11, 2024 ↗View →
WLK
WESTLAKE CORP
SALE
EVP, HIP, IT & Digital
7,665——3,950Mar 7, 2024Mar 11, 2024 ↗View →
WLK
WESTLAKE CORP
SALE
EVP, HIP, IT & Digital
4,083$129.92$530.5K25,546Feb 20, 2024Feb 21, 2024 ↗View →
WLK
WESTLAKE CORP
SALE
EVP, HIP, IT & Digital
399$137.38$54.8K25,144Feb 20, 2024Feb 21, 2024 ↗View →
WLK
WESTLAKE CORP
SALE
EVP, HIP, IT & Digital
3$135.32$40625,543Feb 20, 2024Feb 21, 2024 ↗View →
WLK
WESTLAKE CORP
SALE
EVP, HIP, IT & Digital
4,283——0Feb 19, 2024Feb 21, 2024 ↗View →
WLK
WESTLAKE CORP
PURCHASE
EVP, HIP, IT & Digital
4,283——29,629Feb 19, 2024Feb 21, 2024 ↗View →
WLK
WESTLAKE CORP
PURCHASEGRANT
Stock grant
8,592——25,346Feb 16, 2024Feb 21, 2024 ↗View →
WLK
WESTLAKE CORP
PURCHASEGRANT
Stock grant
8,509——8,509Feb 16, 2024Feb 20, 2024 ↗View →
WLK
WESTLAKE CORP
PURCHASEGRANT
Stock grant
3,073——3,073Feb 16, 2024Feb 20, 2024 ↗View →
WLK
WESTLAKE CORP
SALE
EVP, HIP, IT & Digital
4,215$130.50$550.1K16,754Nov 15, 2023Nov 17, 2023 ↗View →
WLK
WESTLAKE CORP
SALE
EVP, HIP, IT & Digital
4,857$134.47$653.1K20,969Aug 30, 2023Aug 31, 2023 ↗View →
WLK
WESTLAKE CORP
PURCHASE
EVP, HIP, IT & Digital
4,857——0Aug 30, 2023Aug 31, 2023 ↗View →
WLK
WESTLAKE CORP
PURCHASE
EVP, HIP, IT & Digital
4,857$86.54$420.3K25,826Aug 30, 2023Aug 31, 2023 ↗View →
WLK
WESTLAKE CORP
PURCHASE
EVP, HIP, IT & Digital
8,100$65.81$533.1K29,069Aug 29, 2023Aug 30, 2023 ↗View →
WLK
WESTLAKE CORP
SALE
EVP, HIP, IT & Digital
8,100$133.83$1.08M20,969Aug 29, 2023Aug 30, 2023 ↗View →
WLK
WESTLAKE CORP
PURCHASE
EVP, HIP, IT & Digital
8,100——0Aug 29, 2023Aug 30, 2023 ↗View →
WLK
WESTLAKE CORP
PURCHASEGRANT
Stock grant
13,164——13,164May 12, 2023May 16, 2023 ↗View →
WLK
WESTLAKE CORP
SALE
EVP, HIP, IT & Digital
4,512$104.32$470.7K21,209Mar 13, 2023Mar 15, 2023 ↗View →
WLK
WESTLAKE CORP
SALE
EVP, HIP, IT & Digital
240$105.27$25.3K20,969Mar 13, 2023Mar 15, 2023 ↗View →
WLK
WESTLAKE CORP
PURCHASEGRANT
Stock grant
11,298——25,721Feb 17, 2023Mar 15, 2023 ↗View →
WLK
WESTLAKE CORP
PURCHASEGRANT
Stock grant
11,298——25,721Feb 17, 2023Feb 17, 2023 ↗View →
WLK
WESTLAKE CORP
PURCHASEGRANT
Stock grant
3,478——3,478Feb 17, 2023Feb 21, 2023 ↗View →
WLK
WESTLAKE CORP
PURCHASEGRANT
Stock grant
9,495——9,495Feb 17, 2023Feb 21, 2023 ↗View →
WLK
WESTLAKE CORP
SALE
EVP, HIP, IT & Digital
20$122.41$2.4K14,423Feb 15, 2023Feb 16, 2023 ↗View →
WLK
WESTLAKE CORP
SALE
EVP, HIP, IT & Digital
1,397$121.86$170.2K14,443Feb 15, 2023Feb 16, 2023 ↗View →
WLK
WESTLAKE CORP
PURCHASE
EVP, HIP, IT & Digital
5,632——15,840Feb 14, 2023Feb 16, 2023 ↗View →
WLK
WESTLAKE CORP
SALE
EVP, HIP, IT & Digital
5,632——0Feb 14, 2023Feb 16, 2023 ↗View →
WLK
WESTLAKE CORP
SALE
EVP, HIP, IT & Digital
1,000$98.94$98.9K10,208Aug 31, 2022Sep 1, 2022 ↗View →
WLK
WESTLAKE CORP
SALEGRANT
Gift
572——11,208Aug 23, 2022Aug 24, 2022 ↗View →
WLK
WESTLAKE CORP
SALE
EVP, HIP, IT & Digital
14,427$129.47$1.87M11,780May 27, 2022May 31, 2022 ↗View →
WLK
WESTLAKE CORP
SALE
EVP, HIP, IT & Digital
9,571——0May 27, 2022May 31, 2022 ↗View →
WLK
WESTLAKE CORP
PURCHASE
EVP, HIP, IT & Digital
4,856$86.54$420.2K26,207May 27, 2022May 31, 2022 ↗View →
WLK
WESTLAKE CORP
SALE
EVP, HIP, IT & Digital
4,856——9,862May 27, 2022May 31, 2022 ↗View →
WLK
WESTLAKE CORP
PURCHASE
EVP, HIP, IT & Digital
9,571$107.75$1.03M21,351May 27, 2022May 31, 2022 ↗View →
WLK
WESTLAKE CORP
SALEGRANT
Gift
500——11,780Mar 15, 2022Mar 16, 2022 ↗View →
WLK
WESTLAKE CORP
SALE
EVP, HIP, IT & Digital
3$120.25$36112,280Mar 14, 2022Mar 15, 2022 ↗View →
WLK
WESTLAKE CORP
SALE
EVP, HIP, IT & Digital
2,556$118.51$302.9K12,283Mar 14, 2022Mar 15, 2022 ↗View →
WLK
WESTLAKE CORP
SALE
EVP, HIP, IT & Digital
14,694——0Mar 10, 2022Mar 14, 2022 ↗View →
WLK
WESTLAKE CORP
SALE
EVP, HIP, IT & Digital
7,861——8,100Mar 10, 2022Mar 14, 2022 ↗View →
WLK
WESTLAKE CORP
PURCHASE
EVP, HIP, IT & Digital
14,694$79.83$1.17M29,533Mar 10, 2022Mar 14, 2022 ↗View →
WLK
WESTLAKE CORP
SALE
EVP, HIP, IT & Digital
22,555$117.61$2.65M14,839Mar 10, 2022Mar 14, 2022 ↗View →
WLK
WESTLAKE CORP
PURCHASE
EVP, HIP, IT & Digital
7,861$65.81$517.4K37,394Mar 10, 2022Mar 14, 2022 ↗View →
WLK
WESTLAKE CORP
SALE
EVP, HIP, IT & Digital
2,730$115.55$315.5K14,839Mar 9, 2022Mar 10, 2022 ↗View →
WLK
WESTLAKE CORP
PURCHASEGRANT
Stock grant
6,446——17,569Feb 18, 2022Mar 15, 2022 ↗View →
WLK
WESTLAKE CORP
PURCHASEGRANT
Stock grant
6,446——17,569Feb 18, 2022Feb 22, 2022 ↗View →
WLK
WESTLAKE CORP
PURCHASEGRANT
Stock grant
12,923——12,923Feb 18, 2022Feb 22, 2022 ↗View →
WLK
WESTLAKE CORP
PURCHASEGRANT
Stock grant
11,615——11,615Feb 18, 2022Feb 22, 2022 ↗View →
WLK
WESTLAKE CORP
SALE
EVP, Vinyl Products
963$104.96$101.1K11,123Feb 16, 2022Feb 17, 2022 ↗View →
WLK
WESTLAKE CORP
PURCHASE
EVP, Vinyl Products
3,869——12,086Feb 15, 2022Feb 17, 2022 ↗View →
WLK
WESTLAKE CORP
SALE
EVP, Vinyl Products
3,869——0Feb 15, 2022Feb 17, 2022 ↗View →
WLK
WESTLAKE CORP
PURCHASEGRANT
Stock grant
7,051——7,051Aug 13, 2021Aug 16, 2021 ↗View →
WLK
WESTLAKE CORP
SALE
EVP, Vinyl Products
5,000$105.00$525.0K8,217May 10, 2021May 11, 2021 ↗View →
WLK
WESTLAKE CORP
SALEGRANT
Gift
82——13,217Mar 18, 2021Mar 18, 2021 ↗View →
WLK
WESTLAKE CORP
SALE
EVP, Vinyl Products
7,861——15,961Mar 8, 2021Mar 9, 2021 ↗View →
WLK
WESTLAKE CORP
SALE
EVP, Vinyl Products
8,652——0Mar 8, 2021Mar 9, 2021 ↗View →
WLK
WESTLAKE CORP
SALE
EVP, Vinyl Products
7,861$95.00$746.8K13,299Mar 8, 2021Mar 9, 2021 ↗View →
WLK
WESTLAKE CORP
SALE
EVP, Vinyl Products
8,652$92.50$800.3K21,160Mar 8, 2021Mar 9, 2021 ↗View →
WLK
WESTLAKE CORP
PURCHASE
EVP, Vinyl Products
7,861$65.81$517.4K29,812Mar 8, 2021Mar 9, 2021 ↗View →
WLK
WESTLAKE CORP
PURCHASE
EVP, Vinyl Products
8,652$61.87$535.3K21,951Mar 8, 2021Mar 9, 2021 ↗View →
WLK
WESTLAKE CORP
PURCHASEGRANT
Stock grant
14,718——14,718Feb 19, 2021Feb 22, 2021 ↗View →
WLK
WESTLAKE CORP
PURCHASEGRANT
Stock grant
4,283——4,283Feb 19, 2021Feb 22, 2021 ↗View →
WLK
WESTLAKE CORP
SALE
EVP, Vinyl Products
641$85.08$54.5K13,299Feb 18, 2021Feb 18, 2021 ↗View →
WLK
WESTLAKE CORP
SALE
EVP, Vinyl Products
322$85.73$27.6K11,375Feb 16, 2021Feb 17, 2021 ↗View →
WLK
WESTLAKE CORP
SALE
EVP, Vinyl Products
4$87.43$35011,371Feb 16, 2021Feb 17, 2021 ↗View →
WLK
WESTLAKE CORP
SALE
EVP, Vinyl Products
4$87.43$35011,371Feb 16, 2021Feb 17, 2021 ↗View →
WLK
WESTLAKE CORP
SALE
EVP, Vinyl Products
322$85.73$27.6K11,375Feb 16, 2021Feb 17, 2021 ↗View →
WLK
WESTLAKE CORP
PURCHASE
EVP, Vinyl Products
2,569——13,940Feb 16, 2021Feb 18, 2021 ↗View →
WLK
WESTLAKE CORP
SALE
EVP, Vinyl Products
2,569——0Feb 16, 2021Feb 18, 2021 ↗View →
WLK
WESTLAKE CORP
PURCHASE
EVP, Vinyl Products
1,128——11,697Feb 14, 2021Feb 17, 2021 ↗View →
WLK
WESTLAKE CORP
SALE
EVP, Vinyl Products
1,128——0Feb 14, 2021Feb 17, 2021 ↗View →
WLK
WESTLAKE CORP
PURCHASE
EVP, Vinyl Products
1,128——11,697Feb 14, 2021Feb 17, 2021 ↗View →
WLK
WESTLAKE CORP
SALE
EVP, Vinyl Products
1,128——0Feb 14, 2021Feb 17, 2021 ↗View →
WLK
WESTLAKE CORP
PURCHASE
EVP, Vinyl Products
4,581$44.42$203.5K15,150Nov 24, 2020Nov 25, 2020 ↗View →
WLK
WESTLAKE CORP
SALE
EVP, Vinyl Products
4,581——0Nov 24, 2020Nov 25, 2020 ↗View →
WLK
WESTLAKE CORP
SALE
EVP, Vinyl Products
4,581$77.50$355.0K10,569Nov 24, 2020Nov 25, 2020 ↗View →
WLK
WESTLAKE CORP
SALE
EVP, Vinyl Products
918$60.52$55.6K10,569Feb 18, 2020Feb 19, 2020 ↗View →
WLK
WESTLAKE CORP
SALE
EVP, Vinyl Products
3,306——0Feb 17, 2020Feb 19, 2020 ↗View →
WLK
WESTLAKE CORP
PURCHASE
EVP, Vinyl Products
3,306——11,487Feb 17, 2020Feb 19, 2020 ↗View →
WLK
WESTLAKE CORP
PURCHASEGRANT
Stock grant
1,128——1,128Feb 14, 2020Feb 18, 2020 ↗View →
WLK
WESTLAKE CORP
PURCHASEGRANT
Stock grant
23,822——23,822Feb 14, 2020Feb 18, 2020 ↗View →
WLK
WESTLAKE CORP
PURCHASEGRANT
Stock grant
5,632——5,632Feb 14, 2020Feb 18, 2020 ↗View →
Other insiders · WLK
Loading peer insiders…
About this filer
CIK 0001488587
ROLE
EVP, HIP, IT and Digital
PRIMARY
WLK
COMPANIES
1
ACTIVE SINCE
Feb 2020
MARKETPEEL · /INSIDER/0001488587DATA · SEC EDGAR · FORM 4 · CONSOLIDATED TAPE
FREE · DAILY · 6 AM ET

The morning brief, before the bell.

One short email. Insider buys, congressional trades, and plain-English analysis.

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