Insider trading

Period: 120 months Stock: CNM Minimum amount: $1M × + Add filter Clear all
Views & alerts

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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.

49 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.

49 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.

49 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.

49 decisions over 120 months Remove this filter
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.
49 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
49 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.

49 decisions over 120 months
Stock
Insider
Type ?
Why it stands out
18 Aug 2025
Witkowski Mark R Chief Executive Officer
Sold on a plan
$6.41M 100,000 at 64.08
73.6%
Sold half or more
18 Jul 2025
Castellano James G Director · indirect
Sold on a plan
$2.73M 43,994 at 61.98
100%
Sold half or more
18 Jul 2025
Sold on a plan
$1.48M 23,962 at 61.77
63.2%
Sold half or more
17 Jul 2025
Witkowski Mark R Chief Executive Officer
Sold on a plan 2×
$6.13M 100,000 at 61.26
73.6%
Sold half or more
7 Jul 2025
LeClair Stephen O Executive Chair
Sold at will
$2.78M 44,972 at 61.91
38.9%
Not planned
3 Jul 2025
LeClair Stephen O Executive Chair
Sold at will
$4.98M 80,028 at 62.27
53.1%
Sold half or more
1 Jul 2025
Bradbury Robyn L Chief Financial Officer
Sold on a plan 3×
$1.51M 25,000 at 60.49
74.5%
Sold half or more
9 Jun 2025
Whittenburg Mark G General Counsel and Secretary
Sold on a plan
$2.95M 49,100 at 60.03
83.5%
Sold half or more
3 Jun 2025
Schneider Laura K Chief Human Resources Officer
Sold on a plan
$2.57M 45,695 at 56.25
78.0%
Sold half or more
29 Apr 2025
Stephens John Weldon Chief Accounting Officer
Sold on a plan
$1.68M 31,750 at 53.03
88.5%
Sold half or more
2 Apr 2025
Stephens John Weldon Chief Accounting Officer
Sold on a plan
$2.12M 41,963 at 50.48
91.1%
Sold half or more
10 Mar 2025
Schaller John R Executive Vice President
Sold on a plan
$1.02M 21,868 at 46.82
57.1%
Sold half or more
10 Feb 2025
Cowles Bradford A President
Sold on a plan
$1.36M 25,000 at 54.48
61.0%
Sold half or more
16 Jan 2025
Whittenburg Mark G General Counsel and Secretary
Sold on a plan
$2.65M 48,026 at 55.13
86.2%
Sold half or more
10 Jan 2025
Schaller John R Executive Vice President
Sold on a plan 3×
$3.06M 60,452 at 50.57
77.2%
Sold half or more
10 Jan 2025
Whittenburg Mark G General Counsel and Secretary
Sold on a plan
$2.52M 50,000 at 50.49
86.7%
Sold half or more
3 Dec 2024
LeClair Stephen O Chief Executive Officer
Sold on a plan
$10.98M 200,000 at 54.88
68.4%
Sold half or more
3 Dec 2024
Cowles Bradford A President
Sold on a plan
$2.75M 50,000 at 55.07
73.1%
Sold half or more
3 Dec 2024
Giles Jeffrey D EVP, Corporate Department
Sold on a plan
$1.37M 25,000 at 54.71
68.3%
Sold half or more
16 Jul 2024
Gipson Dennis G Director · indirect
Sold on a plan
$1.33M 25,000 at 53.08
100%
Sold half or more
8 May 2024
Witkowski Mark R Chief Financial Officer
Sold on a plan
$2.98M 50,000 at 59.50
67.7%
Sold half or more
19 Apr 2024
Whittenburg Mark G General Counsel and Secretary
Sold on a plan
$2.70M 50,000 at 54.08
79.4%
Sold half or more
8 Apr 2024
Witkowski Mark R Chief Financial Officer
Sold on a plan
$2.93M 50,000 at 58.51
67.7%
Sold half or more
22 Mar 2024
Whittenburg Mark G General Counsel and Secretary
Sold at will
$2.90M 50,000 at 57.91
79.4%
Sold half or more
7 Mar 2024
Stephens John Weldon VP, Corp. Controller
Sold on a plan
$2.20M 43,900 at 50.02
92.7%
Sold half or more
12 Feb 2024
LeClair Stephen O Chief Executive Officer
Sold on a plan
$6.62M 150,000 at 44.14
67.1%
Sold half or more
12 Feb 2024
Schneider Laura K Chief Human Resources Officer
Sold on a plan
$4.41M 100,000 at 44.14
91.2%
Sold half or more
12 Feb 2024
Giles Jeffrey D VP, Corporate Department
Sold on a plan
$1.77M 40,000 at 44.14
83.0%
Sold half or more
25 Jan 2024
CD&R Investment Associates X, Ltd. 10% owner · indirect
Sold at will 7×
$938.88M 22,907,815 at 40.99
100%
Sold half or more
16 Jan 2024
Schaller John R President · indirect
Sold on a plan
$2.05M 50,000 at 40.99
100%
Sold half or more
11 Jan 2024
LeClair Stephen O Chief Executive Officer
Sold on a plan
$6.10M 150,000 at 40.66
67.1%
Sold half or more
11 Jan 2024
Schneider Laura K Chief Human Resources Officer
Sold on a plan
$4.06M 100,000 at 40.63
91.2%
Sold half or more
11 Jan 2024
Giles Jeffrey D VP, Corporate Department
Sold on a plan
$1.63M 40,000 at 40.64
83.0%
Sold half or more
10 Jan 2024
CD&R Investment Associates X, Ltd. 10% owner · indirect
Sold at will 7×
$864.40M 22,675,728 at 38.12
100%
Sold half or more
11 Dec 2023
CD&R Investment Associates X, Ltd. 10% owner · indirect
Sold at will 7×
$724.15M 20,375,728 at 35.54
100%
Sold half or more
15 Nov 2023
CD&R Investment Associates X, Ltd. 10% owner · indirect
Sold at will 4×
$86.75M 2,850,000 at 30.44
100%
Sold half or more
15 Nov 2023
Witkowski Mark R Chief Financial Officer
Sold on a plan
$1.36M 40,000 at 34.01
67.5%
Sold half or more
9 Nov 2023
CD&R Investment Associates X, Ltd. 10% owner · indirect
Sold at will 7×
$673.51M 22,125,728 at 30.44
100%
Sold half or more
12 Oct 2023
Cowles Bradford A President
Sold on a plan
$1.60M 50,000 at 31.94
77.3%
Sold half or more
25 Sep 2023
Witkowski Mark R Chief Financial Officer
Sold on a plan
$1.14M 40,000 at 28.44
67.5%
Sold half or more
19 Sep 2023
CD&R Investment Associates X, Ltd. 10% owner · indirect
Sold at will 7×
$612.96M 21,125,728 at 29.02
100%
Sold half or more
27 Jun 2023
Schneider Laura K Chief Human Resources Officer
Sold on a plan
$1.50M 49,904 at 30.03
83.8%
Sold half or more
12 Jun 2023
CD&R Investment Associates X, Ltd. 10% owner · indirect
Sold at will 7×
$483.20M 17,125,728 at 28.22
100%
Sold half or more
7 Jun 2023
LeClair Stephen O Chief Executive Officer
Sold on a plan
$1.03M 35,712 at 28.77
32.6%
Planned (10b5-1)
6 Jun 2023
Schneider Laura K Chief Human Resources Officer
Sold on a plan
$1.41M 50,000 at 28.28
83.8%
Sold half or more
14 Apr 2023
CD&R Investment Associates X, Ltd. 10% owner · indirect
Sold at will 7×
$318.47M 14,377,183 at 22.15
100%
Sold half or more
3 Mar 2023
Schneider Laura K Chief Human Resources Officer
Sold, plan not stated
$1.60M 66,763 at 24.03
93.2%
Sold half or more
19 Sep 2022
CD&R Investment Associates X, Ltd. 10% owner · indirect
Sold, plan not stated 4×
$258.87M 11,000,000 at 23.53
100%
Sold half or more
10 Jan 2022
CD&R Investment Associates X, Ltd. 10% owner · indirect
Sold, plan not stated 4×
$502.32M 20,000,000 at 25.12
100%
Sold half or more
Showing 1–49 of 49.