WLK WESTLAKE CORP

BEARISH Impact: 6/10 Insider Cluster (2 insiders)
Horizon days Filed Mar 27, 2026 Processed 2mo ago
Insider cluster: 2 insiders, $2.3M total
Latest settled — T+20d ⚠ clustered
WLK ▼ -2.34% at T+20d
SHORT call ✓ call won +2.34% · α vs SPY +15.08% · entry $113.29 → $110.64
Next anchor: T+60d in 10d
Currently $88.50 · +21.88% from $113.29 entry (call sign-flipped)
Entry anchored
Mar 26, 03:59 PM ET
via Databento tick
T+1d
+2.37%
call -2.37% · α -2.73%
$115.97
settled 3mo ago
T+5d
+5.51%
call -5.51% · α -1.65%
$119.53
settled 2mo ago
T+20d
-2.34%
call +2.34% · α +15.08%
$110.64
settled 7w ago
T+60d
call — · α —
in 10d

Price Chart

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Executive Summary

Two Westlake Corp executives — the CFO and a senior segment head — sold shares worth $2.31M in late March 2026, just days before the company announced a new $1.5B credit facility. The sales were open-market transactions, not forced or tax-related, and represent a notable outflow from top leadership.

Key Financial Metrics

Direction
selling
Total Value
$2.3M
Insiders
2

Actionable Insight

Selling by the CFO and a key segment leader just before a material financing event raises questions about internal confidence. Traders should monitor upcoming earnings calls for commentary on capital allocation and leadership stability. While not yet a red flag, the timing is concerning.

Key Facts

  • CFO Mark Steven Bender sold $1.85M worth of shares (16,400 shares) on March 27, 2026.
  • PEM Segment Head Robert Buesinger sold $461K worth of shares (4,000 shares) on the same day.
  • Total insider selling in the 7-day window: $2.31M, all via open-market transactions (code 'S').
  • This cluster follows a recent executive departure and precedes a major refinancing announcement.
  • No open-market purchases or cash-incented buy activity observed in the window.

Financial Impact

$2.31 million in open-market sales by two EVPs, representing 0.015% of market cap

insider sentimentinvestor confidence

Risk Factors

  • Insider selling ahead of major corporate action may signal lack of conviction.
  • Potential perception of leadership instability following recent executive changes.

Market Snapshot

Exchange
NYSE
Sector
Industrial Organic Chemicals

Documents Analyzed

This report is based on 1 SEC document filed with EDGAR.

DocumentAccession Number
CLUSTER Data (Synthetic)cluster-WLK-1775476969953
9 reports for WLK
Performance horizon

Track record builds as more directional reports settle.

Filters
Rows
Reports for WLK — sortable, filterable
Type Now
May 5, 2026
5w ago
8-K
BEARISH ★ 7/10
$104.29 $86.83▲ +16.74%▲ +21.70%$88.50 (+15.14%)
Apr 20, 2026
7w ago
8-K
NEUTRAL ★ 4/10
$115.44 $91.46▼ −20.77%▼ −25.69%$88.50 (−23.34%)
Apr 14, 2026
8w ago
8-K
BEARISH ★ 7/10
$117.84 $97.56▲ +17.21%▲ +23.51%$88.50 (+24.90%)
Apr 6, 2026
9w ago
8-K
NEUTRAL ★ 4/10
$119.51 $114.07▼ −4.55%▼ −13.53%$88.50 (−25.95%)
Apr 2, 2026
10w ago
8-K
NEUTRAL ★ 3/10
$119.21 $115.28▼ −3.30%▼ −13.17%$88.50 (−25.76%)
Apr 2, 2026
10w ago
DEFA14A
NEUTRAL ★ 3/10
$119.21 $115.28▼ −3.30%▼ −13.17%$88.50 (−25.76%)
Mar 30, 2026
10w ago
144
NEUTRAL ★ 2/10
$116.82 $111.83▼ −4.27%▼ −13.69%$88.50 (−24.24%)
Mar 27, 2026
11w ago
144
NEUTRAL ★ 3/10
$116.00 $110.07▼ −5.11%▼ −17.71%$88.50 (−23.71%)
Mar 27, 2026
11w ago
Insider Cluster
BEARISH ★ 6/10
$113.29 $110.64▲ +2.34%▲ +15.08%$88.50 (+21.88%)
Showing 9 of 9

US Market Status

Market Closed — Opens Mon (49h 30m)

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