Insider trading

Period: 120 months Stock: WLK Role: CFO × + 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.

27 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.

27 decisions over 120 months Remove this filter
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.

27 decisions over 120 months
The trade

Minimum amount

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

27 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.
27 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
27 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.

27 decisions over 120 months
Stock
Insider
Type ?
Why it stands out
27 Mar 2026
Bender Mark Steven EVP & CFO
Sold at will
$1.85M 16,413 at 112.54
36.9%
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
3 May 2024
Bender Mark Steven EVP & CFO
Sold at will
$753.34K 4,950 at 152.19
10.9%
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
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
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%
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%
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%
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 May 2018
Bender Mark Steven EVP and CFO
Sold, plan not stated 3×
$1.48M 12,066 at 122.83
43.3%
11 May 2018
Bender Mark Steven EVP and CFO
Sold, plan not stated
$2.76M 23,506 at 117.33
59.8%
Sold half or more
26 Feb 2018
Bender Mark Steven EVP and CFO
Sold, plan not stated 2×
$558.47K 5,000 at 111.69
24.0%
22 Feb 2018
Bender Mark Steven EVP and CFO
Sold, plan not stated 2×
$665.15K 6,000 at 110.86
22.4%
4 Dec 2017
Bender Mark Steven EVP and CFO
Sold, plan not stated
$635.90K 6,500 at 97.83
21.3%
21 Nov 2017
Bender Mark Steven EVP and CFO
Sold, plan not stated
$1.92M 20,382 at 94.27
45.9%
13 Nov 2017
Bender Mark Steven EVP and CFO
Sold, plan not stated 2×
$2.80M 29,804 at 94.02
40.1%
15 Aug 2017
Bender Mark Steven Executive VP & CFO
Sold, plan not stated
$968.62K 13,794 at 70.22
23.7%
10 Mar 2017
Bender Mark Steven Sr VP, CFO and Treasurer
Sold, plan not stated
$771.78K 12,000 at 64.32
17.1%
Showing 1–27 of 27.