Insider trading

Period: 120 months Stock: MTX Minimum amount: $100K × + 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.

48 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.

48 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.

48 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.

48 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.
48 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
48 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.

48 decisions over 120 months
Stock
Insider
Type ?
Why it stands out
14 May 2026
DIETRICH DOUGLAS T CHAIRMAN AND CEO
Sold at will
$1.76M 21,568 at 81.53
10.9%
Not planned
11 May 2026
JORDAN TIMOTHY Vice President
Sold at will
$481.65K 6,000 at 80.27
82.4%
Sold half or more
29 Dec 2025
MONAGLE DJ III Group President
Sold at will
$1.43M 23,093 at 61.90
21.5%
Not planned
21 Nov 2025
ARGIRAKIS BRETT Group President
Sold at will
$381.46K 6,501 at 58.68
19.1%
Not planned
30 Apr 2025
DIETRICH DOUGLAS T CHAIRMAN AND CEO
Bought
$103.12K 2,000 at 51.56
1.3%
First buy on file
24 Jun 2024
MONAGLE DJ III Group President
Sold at will
$1.19M 14,229 at 83.63
15.1%
Not planned
18 Jun 2024
Hastings Jonathan J Senior Vice President
Sold at will
$1.82M 21,543 at 84.35
28.6%
Not planned
17 Jun 2024
ARGIRAKIS BRETT Group President
Sold at will
$189.64K 2,259 at 83.95
8.9%
Not planned
12 Jun 2024
Hastings Jonathan J Senior Vice President
Sold at will 2×
$765.68K 8,964 at 85.42
14.3%
Not planned
29 May 2024
DIETRICH DOUGLAS T Chairman and CEO
Sold at will
$2.10M 24,978 at 84.18
14.6%
Not planned
28 May 2024
DIETRICH DOUGLAS T Chairman and CEO
Sold at will
$1.02M 12,010 at 84.85
7.6%
Not planned
28 May 2024
CIPOLLA MICHAEL VICE PRESIDENT
Sold at will
$1.01M 11,958 at 84.36
25.0%
Not planned
21 May 2024
Hastings Jonathan J Senior Vice President
Sold at will
$649.60K 7,814 at 83.13
12.7%
Not planned
20 Feb 2024
Hastings Jonathan J Senior Vice President
Sold at will
$923.64K 12,922 at 71.48
19.3%
Not planned
20 Dec 2023
MONAGLE DJ III Group President
Sold at will 2×
$993.80K 14,598 at 68.08
16.0%
Not planned
14 Dec 2023
ARGIRAKIS BRETT Group President
Sold at will
$177.46K 2,655 at 66.84
12.3%
Not planned
7 Dec 2023
DIETRICH DOUGLAS T Chairman and CEO
Sold at will
$866.17K 13,662 at 63.40
9.4%
Not planned
7 Dec 2023
CIPOLLA MICHAEL VICE PRESIDENT
Sold at will
$305.28K 4,818 at 63.36
12.4%
Not planned
30 Nov 2023
Hastings Jonathan J Senior Vice President
Sold at will
$559.46K 8,960 at 62.44
15.4%
Not planned
2 Dec 2022
Meek Thomas J Senior Vice President
Sold, plan not stated 2×
$1.05M 16,795 at 62.52
16.7%
12 Sep 2022
MONAGLE DJ III Group President
Sold, plan not stated
$1.25M 19,673 at 63.36
21.4%
8 Sep 2022
DIETRICH DOUGLAS T Chairman and CEO
Sold, plan not stated
$978.87K 16,299 at 60.06
12.1%
18 Aug 2022
Hastings Jonathan J Group President
Sold, plan not stated
$770.92K 11,739 at 65.67
20.9%
11 Aug 2022
CIPOLLA MICHAEL VICE PRESIDENT
Sold, plan not stated
$408.53K 6,356 at 64.27
16.4%
16 Dec 2021
MONAGLE DJ III Group President
Sold, plan not stated 2×
$676.96K 9,340 at 72.48
12.1%
15 Dec 2021
Meek Thomas J Senior Vice President
Sold, plan not stated 3×
$1.19M 16,814 at 71.05
17.8%
17 Nov 2021
MONAGLE DJ III Group President
Sold, plan not stated
$638.89K 8,600 at 74.29
11.3%
4 Jun 2021
MAYGER DOUGLAS W Senior Vice President
Sold, plan not stated
$966.49K 11,233 at 86.04
20.8%
25 Feb 2021
DIETRICH DOUGLAS T Chief Executive Officer
Sold, plan not stated 3×
$986.87K 13,615 at 72.48
11.8%
24 Feb 2021
CIPOLLA MICHAEL VICE PRESIDENT
Sold, plan not stated
$451.99K 6,246 at 72.36
17.1%
16 Feb 2021
MAYGER DOUGLAS W Senior Vice President
Sold, plan not stated
$1.67M 24,500 at 68.36
36.5%
28 Dec 2020
Hastings Jonathan J Group President
Sold, plan not stated 2×
$324.47K 5,190 at 62.52
12.9%
10 Dec 2020
JONES ANDREW M Vice President
Sold, plan not stated
$186.36K 3,009 at 61.93
25.6%
11 Nov 2020
MONAGLE DJ III Group President
Sold, plan not stated
$880.31K 14,662 at 60.04
19.4%
10 Nov 2020
CIPOLLA MICHAEL VICE PRESIDENT
Sold, plan not stated
$375.28K 5,992 at 62.63
17.5%
9 Nov 2020
DIETRICH DOUGLAS T Chief Executive Officer
Sold, plan not stated
$728.63K 11,856 at 61.46
12.2%
9 Nov 2020
Meek Thomas J Senior Vice President
Sold, plan not stated
$726.62K 11,807 at 61.54
14.1%
11 Dec 2019
MONAGLE DJ III Senior Vice President
Sold, plan not stated
$778.07K 14,194 at 54.82
21.0%
10 Dec 2019
Meek Thomas J Senior Vice President
Sold, plan not stated
$659.48K 14,369 at 45.90
18.4%
9 Dec 2019
CIPOLLA MICHAEL VICE PRESIDENT
Sold, plan not stated
$403.69K 7,380 at 54.70
21.9%
27 Aug 2019
Meek Thomas J Senior Vice President
Sold, plan not stated
$344.31K 7,502 at 45.90
11.4%
19 Dec 2018
MONAGLE DJ III Senior Vice President
Sold, plan not stated 3×
$870.09K 17,454 at 49.85
27.7%
16 Nov 2018
JONES ANDREW M Vice President
Sold, plan not stated 2×
$429.05K 7,486 at 57.31
66.1%
Sold half or more
12 Jun 2018
MAYGER DOUGLAS W Senior Vice President
Sold, plan not stated
$692.70K 9,198 at 75.31
19.6%
26 Sep 2017
MONAGLE DJ III Senior Vice President
Sold, plan not stated
$399.95K 5,713 at 70.01
14.4%
25 Sep 2017
MONAGLE DJ III Senior Vice President
Sold, plan not stated
$1.40M 19,926 at 70.03
33.5%
10 Feb 2017
MAYGER DOUGLAS W Senior Vice President
Sold, plan not stated 3×
$576.41K 7,373 at 78.18
19.8%
14 Nov 2016
CIPOLLA MICHAEL VICE PRESIDENT
Sold, plan not stated
$260.23K 3,500 at 74.35
14.0%
Showing 1–48 of 48.