Company_Context
Basic Materials
Industrial Organic Chemicals
Source: SEC SIC
MARKET_TICKER: WLK
WESTLAKE CHEMICAL CORPInsider Trading & SEC Form 4 Analysis
Institutional analysis of internal capital flows based on SEC Form 4 filings.
Open-Market Signal
BEARISH
SOURCE: EDGAR_SYSTEMSTATUS: VERIFIED
Signal_Window
Headline metrics use exact calendar-day windows.
10 directional transactions in 180D
Code P purchases and code S sales are measured from 2026.02.18 — 2026.08.16.
Net_Flow_180D
-$10.7M
Open-market buys minus salesLatest_Form_4
2026.08.11
Latest available filingActive_Insiders_180D
19
Reporting entities in windowTop_Buyer_180D
No 180D buyer
No open-market buys in 180DTop_Seller_180D
Bender Mark Steven
$7.1MAutomated_Intelligence_Report :: WLK
Analysis of eligible SEC Form 4 activity for WLK indicates a bearish 180-day signal. The selected window contains transactions from 19 distinct reporting insiders, with aggregate nominal activity of $25.25M.
Open-market purchases minus open-market sales produce a negative net flow of $10.70M. Open-market executions represent the majority of measured nominal activity in this window, making the directional flow more representative of voluntary trading activity.
The largest open-market sale in the selected window was attributed to Bender Mark Steven (Officer/Other). Form 4 activity provides useful ownership context, but it should not be treated as a standalone prediction of future price performance.
Enriched_Research_Context
More context behind the filing
These indicators use normalized SEC roles, issuer metadata, cluster detection and post-filing market prices already calculated by the data pipeline.
Cluster_Activity
0
Clustered open-market purchase records in the recent filing sample.
No coordinated buying cluster detected
Post_Filing_Performance
Live Market Chart :: WLK
Analyze WLK with advanced technical indicators.
View on TradingView (Get $15 Off)Recent Insider Flow :: WLK
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Recent_Filing_History
Inspect the underlying SEC transactions
This table shows recent filing history and is not restricted by the selected 180D headline signal window.
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Automated_Queries :: Frequently Asked Questions
>How many corporate insiders are active in WLK?
The selected 180-day window contains 19 distinct reporting insiders with eligible transactions for WLK. This count changes when a different signal window is selected.
>Is insider buying outweighing selling at WLK?
Open-market selling volume ($10.70M) currently exceeds buying volume ($0.00M), indicating net liquidation by insiders.
>Who is currently buying WLK stock?
No eligible open-market purchases were reported for WLK during the last 180 calendar days.
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