Insider trading

Period: 120 months Stock: CSTL Share of holding: 50% or more × + Add filter Clear all
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When

Period

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

33 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.

33 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.

33 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.

33 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.
33 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
33 decisions over 120 months Remove this filter
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.

33 decisions over 120 months
Stock
Insider
Type ?
Why it stands out
1 Jun 2026
MAETZOLD DEREK J Pres. & Chief Exec. Officer · indirect
Sold on a plan 6×
$75.54K 3,622 at 20.86
68.5%
Sold half or more
21 May 2026
MAETZOLD DEREK J Pres. & Chief Exec. Officer · indirect
Sold on a plan 6×
$55.80K 2,763 at 20.20
58.7%
Sold half or more
7 May 2026
MAETZOLD DEREK J Pres. & Chief Exec. Officer · indirect
Sold on a plan 12×
$80.24K 3,622 at 22.15
62.0%
Sold half or more
21 Apr 2026
MAETZOLD DEREK J Pres. & Chief Exec. Officer · indirect
Sold on a plan 6×
$90.90K 3,622 at 25.10
59.1%
Sold half or more
6 Apr 2026
MAETZOLD DEREK J Pres. & Chief Exec. Officer · indirect
Sold on a plan 6×
$90.66K 3,622 at 25.03
56.6%
Sold half or more
26 Mar 2026
MAETZOLD DEREK J Pres. & Chief Exec. Officer · indirect
Sold on a plan 6×
$92.55K 3,622 at 25.55
54.2%
Sold half or more
11 Mar 2026
MAETZOLD DEREK J Pres. & Chief Exec. Officer · indirect
Sold on a plan 6×
$94.93K 3,636 at 26.11
52.2%
Sold half or more
17 Dec 2025
Oelschlager Kristen M Chief Operating Officer
Sold at will
$585.29K 14,888 at 39.31
54.7%
Sold half or more
11 Nov 2025
Oelschlager Kristen M Chief Operating Officer
Sold on a plan
$664.51K 18,932 at 35.10
60.6%
Sold half or more
27 Jun 2025
MAETZOLD DEREK J Pres. & Chief Exec. Officer · indirect
Sold on a plan 6×
$357.93K 17,632 at 20.30
83.0%
Sold half or more
21 Apr 2025
MAETZOLD DEREK J Pres. & Chief Exec. Officer · indirect
Sold on a plan 6×
$94.85K 4,408 at 21.52
50.8%
Sold half or more
5 Feb 2025
BRADBURY DANIEL Director · indirect
Sold on a plan 3×
$221.64K 7,867 at 28.17
100%
Sold half or more
6 Jan 2025
BRADBURY DANIEL Director · indirect
Sold on a plan 9×
$229.23K 7,867 at 29.14
84.7%
Sold half or more
3 Dec 2024
BRADBURY DANIEL Director · indirect
Sold on a plan 6×
$243.69K 7,867 at 30.98
73.4%
Sold half or more
1 Nov 2024
BRADBURY DANIEL Director · indirect
Sold on a plan 9×
$273.25K 7,867 at 34.73
64.8%
Sold half or more
7 Oct 2024
BRADBURY DANIEL Director · indirect
Sold on a plan 3×
$231.63K 7,867 at 29.44
58.0%
Sold half or more
5 Sep 2024
BRADBURY DANIEL Director · indirect
Sold on a plan 3×
$228.33K 7,867 at 29.02
52.5%
Sold half or more
6 May 2024
BRADBURY DANIEL Director · indirect
Sold on a plan 3×
$574.68K 23,323 at 24.64
70.0%
Sold half or more
5 Jun 2023
Goldberg Ellen Director
Bought 2×
$69.00K 4,800 at 14.38
113%
First buy on file
29 Nov 2022
Olson Tiffany Director
Bought
$24.98K 1,162 at 21.50
64.3%
Largest buy in 3 yrs
12 May 2022
Olson Tiffany Director
Bought 2×
$24.77K 1,320 at 18.76
272%
First buy on file
2 Sep 2021
Spiess Bernhard E. Chief Business Officer
Sold, plan not stated 3×
$1.17M 15,401 at 75.78
53.2%
Sold half or more
17 Jun 2021
Juvenal Tobin W Chief Commercial Officer
Sold, plan not stated
$754.00K 10,000 at 75.40
78.0%
Sold half or more
15 Jun 2021
Stokes Frank Chief Financial Officer
Sold, plan not stated
$847.03K 11,600 at 73.02
66.2%
Sold half or more
12 Jan 2021
Stokes Frank Chief Financial Officer
Sold, plan not stated 3×
$586.04K 7,500 at 78.14
65.9%
Sold half or more
11 Jan 2021
Stokes Frank Chief Financial Officer
Sold, plan not stated 3×
$585.43K 7,500 at 78.06
65.9%
Sold half or more
1 Dec 2020
Spiess Bernhard E. Chief Business Officer
Sold, plan not stated
$2.00M 40,000 at 49.97
77.3%
Sold half or more
13 Nov 2020
Stokes Frank Chief Financial Officer
Sold, plan not stated 3×
$656.18K 13,000 at 50.48
87.3%
Sold half or more
12 Nov 2020
Stokes Frank Chief Financial Officer
Sold, plan not stated 4×
$666.36K 13,000 at 51.26
87.3%
Sold half or more
14 Oct 2020
Stokes Frank Chief Financial Officer
Sold, plan not stated 3×
$705.11K 13,000 at 54.24
87.3%
Sold half or more
13 Oct 2020
Stokes Frank Chief Financial Officer
Sold, plan not stated
$712.28K 13,000 at 54.79
87.3%
Sold half or more
15 Sep 2020
Stokes Frank Chief Financial Officer
Sold, plan not stated 2×
$637.75K 13,000 at 49.06
87.3%
Sold half or more
14 Sep 2020
Stokes Frank Chief Financial Officer
Sold, plan not stated
$649.78K 13,000 at 49.98
87.3%
Sold half or more
Showing 1–33 of 33.