MarketPeel
Insider Trading Intelligence
Pricing
…
EVP & CFO
Mark Steven Bender
Wed, May 13, 2026
May 13
sold
$514.34k
of
WLK
5,284
shares @ $97.34
Decreased holdings by
-12.80%
25th largest trade (out of 143)
Trade made by an officer
59% win rate · +3.9% median edge vs SPY (27 trades, 90-day)
Price 5% above 200-day moving average
WLK
WESTLAKE CORP
Manufacturing
Industrial Organic Chemicals
1D
0.00%
1W
+1.64%
1M
-11.90%
3M
-35.26%
6M
—
1Y
—
Recent insider activity at WLK
Mar 27
Mark Steven Bender
Sold
$1.85m
Mar 27
Robert F. Buesinger
Sold
$461.00k
Feb 27
Mark Steven Bender
Sold
$1.71m
Feb 27
Mark Steven Bender
Sold
$42.74k
Dec 22
Albert Chao
Sold
$707.14k
Dec 22
Albert Chao
Sold
$38.78k
Dec 22
Albert Chao
Sold
$2.26m
May 27
Robert F. Buesinger
Sold
$6.03k
Full WLK profile →
Mark Steven Bender’s trading history →
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