Insider trading

Period: 120 months Stock: WLK Type of trade: Sold × + Add filter Clear all
Views & alerts

Save your view. Keep the filter you have built, and get an email when a new filing matches it. A free account does both.

When

Period

How far back the list reaches. Filings arrive days after the trade, so the newest rows always lag a little.

105 decisions over 120 months
Who

Role

The position the person holds at the company, read from the title on the filing. A chief executive who is also a director counts as the chief executive.

105 decisions over 120 months
The trade

Type of trade

Purchases, sales, or cluster buys: companies where 3 or more insiders bought within 30 days. The number beside each is what that choice would give.

105 decisions over 120 months Remove this filter
The trade

Minimum amount

Hides rows under this value. The amount is the shares traded times the price on the filing.

105 decisions over 120 months
The trade

Plan

  • Discretionary: they chose to sell that week.
  • Scheduled: a 10b5-1 plan fixed the sale months in advance, so the timing says nothing about what they knew.
  • Not stated: filed before the SEC added the box in April 2023, which is most of the older half of this database.
105 decisions over 120 months
The trade

Share of their own holding

How much of what they already held the trade moved. Selling a tenth of a stake is not the same act as selling all of it.

At least
105 decisions over 120 months
Ownership

What the chief executive holds

The value of the chief executive’s stock measured against base salary. The salary comes from the company’s own proxy. Companies with no figure are in neither direction.

105 decisions over 120 months
Stock
Insider
Type ?
Why it stands out
11 Aug 2026
Chao Albert Executive Chairman
Sold at will 2×
$3.12M 38,873 at 80.28
5.7%
Not planned
27 Mar 2026
Bender Mark Steven EVP & CFO
Sold at will
$1.85M 16,413 at 112.54
36.9%
Not planned
27 Mar 2026
Buesinger Robert F. EVP, PEM Segment Head
Sold at will
$461.00K 4,000 at 115.25
10.4%
Not planned
27 Feb 2026
Bender Mark Steven EVP & CFO
Sold at will 2×
$1.76M 17,409 at 100.92
28.2%
Not planned
22 Dec 2025
Chao Albert Executive Chairman
Sold at will 3×
$3.00M 40,836 at 73.57
6.1%
Not planned
27 May 2025
Buesinger Robert F. EVP, PEM Segment Head · indirect
Sold at will
$6.03K 83 at 72.70
100%
Sold half or more
29 Nov 2024
Sold at will
$225.89K 1,750 at 129.08
18.4%
Not planned
22 Nov 2024
Sold at will
$227.50K 1,750 at 130.00
15.5%
Not planned
9 May 2024
Buesinger Robert F. EVP, HIP, IT & Digital
Sold at will
$554.75K 3,500 at 158.50
16.6%
Not planned
3 May 2024
Bender Mark Steven EVP & CFO
Sold at will
$753.34K 4,950 at 152.19
10.9%
Not planned
15 Mar 2024
Buesinger Robert F. EVP, HIP, IT & Digital
Sold at will
$560.37K 3,878 at 144.50
15.5%
Not planned
13 Mar 2024
Buesinger Robert F. EVP, HIP, IT & Digital
Sold at will
$17.63K 122 at 144.50
0.5%
Not planned
6 Mar 2024
Bender Mark Steven EVP & CFO
Sold at will
$677.46K 4,804 at 141.02
9.6%
Not planned
26 Feb 2024
Bender Mark Steven EVP & CFO
Sold at will
$667.76K 4,854 at 137.57
8.8%
Not planned
15 Nov 2023
Buesinger Robert F. EVP, HIP, IT & Digital
Sold at will
$550.06K 4,215 at 130.50
20.1%
Not planned
23 Aug 2023
Sold at will
$131.00K 1,000 at 131.00
9.0%
Not planned
31 Aug 2022
Buesinger Robert F. EVP, HIP, IT & Digital
Sold, plan not stated
$98.94K 1,000 at 98.94
8.9%
26 Aug 2022
Zoeller Johnathan Stevan VP & Chief Accounting Officer
Sold, plan not stated
$58.04K 542 at 107.08
50.0%
27 May 2022
Buesinger Robert F. EVP, HIP, IT & Digital
Sold, plan not stated
$1.87M 14,427 at 129.47
55.1%
Sold half or more
19 May 2022
Chao Albert President & CEO
Sold, plan not stated 3×
$4.94M 37,876 at 130.38
7.4%
17 May 2022
Kearns Roger L. COO and EVP - PEM
Sold, plan not stated
$1.14M 8,388 at 136.24
24.1%
5 May 2022
Ederington L. Benjamin EVP, GC, CAO and Secretary
Sold, plan not stated 2×
$1.76M 12,569 at 139.81
25.1%
31 Mar 2022
Bender Mark Steven EVP and CFO
Sold, plan not stated 2×
$748.73K 6,021 at 124.35
16.4%
30 Mar 2022
Bender Mark Steven EVP and CFO
Sold, plan not stated 2×
$748.81K 6,000 at 124.80
16.3%
29 Mar 2022
Bender Mark Steven EVP and CFO
Sold, plan not stated
$489.75K 4,000 at 122.44
11.5%
25 Mar 2022
Kearns Roger L. COO and EVP - PEM
Sold, plan not stated 2×
$1.30M 10,333 at 126.00
28.1%
25 Mar 2022
Bender Mark Steven EVP and CFO
Sold, plan not stated 2×
$1.00M 8,000 at 125.34
20.7%
24 Mar 2022
Bender Mark Steven EVP and CFO
Sold, plan not stated
$1.00M 8,000 at 125.38
20.7%
23 Mar 2022
Bender Mark Steven EVP and CFO
Sold, plan not stated 2×
$751.01K 6,000 at 125.17
16.3%
10 Mar 2022
Buesinger Robert F. EVP, HIP, IT & Digital
Sold, plan not stated
$2.65M 22,555 at 117.61
60.3%
Sold half or more
9 Mar 2022
Buesinger Robert F. EVP, HIP, IT & Digital
Sold, plan not stated
$315.45K 2,730 at 115.55
15.5%
1 Mar 2022
Sold, plan not stated
$111.05K 1,006 at 110.39
46.5%
2 Dec 2021
Chao Albert President & CEO
Sold, plan not stated 4×
$2.83M 30,787 at 91.85
6.5%
1 Dec 2021
Chao Albert President & CEO
Sold, plan not stated 6×
$2.82M 30,787 at 91.75
6.5%
11 Nov 2021
Bender Mark Steven EVP and CFO
Sold, plan not stated
$240.62K 2,369 at 101.57
9.7%
8 Nov 2021
Bender Mark Steven EVP and CFO
Sold, plan not stated
$63.59K 631 at 100.77
2.5%
5 Nov 2021
Bender Mark Steven EVP and CFO
Sold, plan not stated
$627.95K 6,356 at 98.80
20.3%
10 May 2021
Buesinger Robert F. EVP, Vinyl Products
Sold, plan not stated
$525.00K 5,000 at 105.00
37.8%
12 Mar 2021
Bender Mark Steven EVP and CFO
Sold, plan not stated 2×
$1.49M 15,740 at 94.70
33.4%
9 Mar 2021
Bender Mark Steven EVP and CFO
Sold, plan not stated
$2.38M 25,811 at 92.27
45.1%
8 Mar 2021
Buesinger Robert F. EVP, Vinyl Products
Sold, plan not stated 2×
$1.55M 16,513 at 93.69
55.4%
Sold half or more
25 Feb 2021
Teel Lawrence E. EVP and Special Advisor to CEO
Sold, plan not stated 2×
$2.91M 33,449 at 86.96
87.2%
Sold half or more
25 Feb 2021
Sold, plan not stated
$87.46K 1,006 at 86.94
100%
Sold half or more
24 Nov 2020
Buesinger Robert F. EVP, Vinyl Products
Sold, plan not stated
$355.03K 4,581 at 77.50
30.2%
23 Nov 2020
Kenner Andrew SVP - Chemical Manufacturing
Sold, plan not stated
$442.82K 5,924 at 74.75
34.1%
6 Nov 2020
Chao Albert President & CEO
Sold, plan not stated 4×
$4.03M 55,148 at 72.99
11.4%
6 Nov 2020
Bender Mark Steven EVP and CFO
Sold, plan not stated
$119.67K 1,600 at 74.79
5.4%
5 Nov 2020
Bender Mark Steven EVP and CFO
Sold, plan not stated 2×
$1.85M 24,996 at 73.99
45.9%
21 Feb 2020
Chao Albert President & CEO
Sold, plan not stated
$3.22M 51,592 at 62.42
12.2%
8 Nov 2019
Mangieri George J SVP & Chief Accounting Officer
Sold, plan not stated
$118.80K 1,583 at 75.05
50.0%
Sold half or more
Showing 1–50 of 105. Page 1 of 3 Older →