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WESTLAKE CORP

WLK Net selling
CIK 0001262823 #932 in the set updated 17 Sep 2026
Bought (12 mo)
$0.00
out of their own pocket, the only kind of buying there is
Sold (12 mo)
$10.19M
$0.00 on a plan · $7.88M straight out of an exercise
Sold at will
$2.31M
2 of 9 sales
Net
−$10.19M
−$2.31M against sales at will

By person

18 insiders · 9 transactions
Insider
Role
Bought
Sold
Net
Holding
Of company
Worth
Change
Chao Albert
Executive Chairman
—
$6.13M (5) scheduled
−$6.13M
642,880
0.5030%
$51.70M
+15.9%
Bender Mark Steven
EVP & CFO
—
$3.60M (3)
−$3.60M
35,895
0.0281%
$2.89M
−14.8%
Buesinger Robert F.
EVP, PEM Segment Head
—
$461.00K (1)
−$461.00K
34,482
0.0270%
$2.77M
+57.3%
Ederington L. Benjamin
EVP, Legal & External Affairs
—
—
—
80,158
0.0627%
$6.45M
+37.6%
Chao James
Senior Chairman
—
—
—
49,774
0.0389%
$4.00M
+29.1%
NORTHCUTT R BRUCE
Director
—
—
—
23,351
0.0183%
$1.88M
+16.4%
Graff Michael J
Director
—
—
—
23,310
0.0182%
$1.87M
+16.5%
Janssens Thomas J.
SVP, Ops - PEM & Corp Logistic
—
—
—
17,127
0.0134%
$1.38M
+42.0%
Sheets Jeffrey Wayne
Director
—
—
—
14,927
0.0117%
$1.20M
+28.3%
Lubel Kimberly S
Director
—
—
—
13,821
0.0108%
$1.11M
+31.3%
Szwejbka Scott Thomas
SVP, HIP Segment Head
—
—
—
13,773
0.0108%
$1.11M
+136.7%
MCCOLLUM MARK A
Director
—
—
—
11,824
0.0093%
$950.89K
+38.6%
Chao David Tsung-Hung
Director
—
—
—
11,080
0.0087%
$891.05K
−1.8%
Chao John Tsung-chen
Director
—
—
—
7,888
0.0062%
$634.35K
+32.1%
Chao Catherine T.
Director
—
—
—
7,748
0.0061%
$623.09K
+74.0%
Sabat Carolyn Chao
Director
—
—
—
5,748
0.0045%
$462.25K
+134.4%
Holy Jeffrey Adam
VP and CAO
—
—
—
5,124
0.0040%
$412.07K
+70.8%
CREGG ROGER A
Director
—
—
—
3,507
0.0027%
$282.03K
—

Individual transactions

9
Insider
Date
Role
Action
Shares
Price
Amount
Chao Albert
11 Aug 2026
Executive Chairman
Sold after exercise
31,384
$80.42
$2.52M
Chao Albert
11 Aug 2026
Executive Chairman
Sold after exercise
7,489
$79.70
$596.87K
Bender Mark Steven
27 Mar 2026
EVP & CFO
Sell
16,413
$112.54
$1.85M
Buesinger Robert F.
27 Mar 2026
EVP, PEM Segment Head
Sell
4,000
$115.25
$461.00K
Bender Mark Steven
27 Feb 2026
EVP & CFO
Sold after exercise
421
$101.52
$42.74K
Bender Mark Steven
27 Feb 2026
EVP & CFO
Sold after exercise
16,988
$100.91
$1.71M
Chao Albert
22 Dec 2025
Executive Chairman
Sold after exercise
521
$74.44
$38.78K
Chao Albert
22 Dec 2025
Executive Chairman
Sold after exercise
30,604
$73.80
$2.26M
Chao Albert
22 Dec 2025
Executive Chairman
Sold after exercise
9,711
$72.82
$707.14K

What was left out

Form 4 filings counted 48
Amendments (4/A) skipped 1
Filings about a different issuer 0
Unreadable filings 0
Joint filings 0
Sales on a Rule 10b5-1 plan 0
Sales straight out of an exercise 7
Sales at will 2
Transactions with no price 0
Shares from compensation/vesting 273,617
History held since 6 Sep 2016