Insider trading

Period: 120 months Stock: DMLP + 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.

154 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.

154 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.

154 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.

154 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.
154 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
154 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.

154 decisions over 120 months
Stock
Insider
Type ?
Why it stands out
19 Aug 2026
MORIYAMA LESLIE A Chief Financial Officer
Bought
$147.08K 5,197 at 28.30
5.3%
1 Jun 2026
DORCHESTER MINERALS OPERATING LP Entity Under Common Control
Bought on a plan 3×
$206.72K 7,500 at 27.56
12.0%
Bought on a plan
20 May 2026
DORCHESTER MINERALS OPERATING LP Entity Under Common Control
Bought on a plan 2×
$212.28K 7,500 at 28.30
13.6%
Bought on a plan
12 May 2026
EHRMAN BRADLEY J Chief Executive Officer · indirect
Bought
$107.12K 4,000 at 26.78
2.9%
13 Feb 2026
DORCHESTER MINERALS OPERATING LP Entity Under Common Control
Bought on a plan
$126.45K 5,000 at 25.29
10.0%
Bought on a plan
12 Feb 2026
DORCHESTER MINERALS OPERATING LP Entity Under Common Control
Bought on a plan
$125.40K 5,000 at 25.08
11.1%
Bought on a plan
11 Feb 2026
DORCHESTER MINERALS OPERATING LP Entity Under Common Control
Bought on a plan
$252.90K 10,000 at 25.29
28.6%
Bought on a plan
22 Dec 2025
DORCHESTER MINERALS OPERATING LP Entity Under Common Control
Bought on a plan
$222.99K 10,000 at 22.30
40.0%
Bought on a plan
19 Dec 2025
DORCHESTER MINERALS OPERATING LP Entity Under Common Control
Bought on a plan
$111.13K 5,000 at 22.23
25.0%
Bought on a plan
18 Dec 2025
DORCHESTER MINERALS OPERATING LP Entity Under Common Control
Bought on a plan
$350.42K 15,729 at 22.28
367%
Bought on a plan
17 Dec 2025
DORCHESTER MINERALS OPERATING LP Entity Under Common Control
Bought on a plan
$94.79K 4,271 at 22.19
×251
Bought on a plan
3 Dec 2025
Box Frank Damon Director
Bought
$109.83K 5,000 at 21.97
125%
Largest buy in 3 yrs
28 Nov 2025
VAUGHN ROBERT C Director
Bought
$4.17K 195 at 21.36
1.0%
26 Nov 2025
EHRMAN BRADLEY J Chief Executive Officer · indirect
Bought
$53.72K 2,487 at 21.60
2.1%
25 Nov 2025
VAUGHN ROBERT C Director
Bought 2×
$98.80K 4,615 at 21.41
29.3%
First buy on file
25 Nov 2025
MORIYAMA LESLIE A Chief Financial Officer
Bought
$65.38K 3,041 at 21.50
3.8%
25 Nov 2025
EHRMAN BRADLEY J Chief Executive Officer · indirect
Bought
$21.26K 1,000 at 21.26
0.8%
5 Sep 2025
Box Frank Damon Director
Bought
$102.28K 4,000 at 25.57
opened
First buy on file
30 Apr 2025
DORCHESTER MINERALS OPERATING LP Entity Under Common Control
Bought on a plan
$287.60K 10,000 at 28.76
20.8%
Bought on a plan
3 Mar 2025
EHRMAN BRADLEY J Chief Executive Officer · indirect
Bought
$100.01K 3,356 at 29.80
2.9%
6 Feb 2025
DORCHESTER MINERALS OPERATING LP Entity Under Common Control
Bought on a plan
$10.41K 335 at 31.06
0.7%
Bought on a plan
4 Feb 2025
DORCHESTER MINERALS OPERATING LP Entity Under Common Control
Bought on a plan
$200.85K 6,500 at 30.90
15.8%
Bought on a plan
31 Jan 2025
DORCHESTER MINERALS OPERATING LP Entity Under Common Control
Bought on a plan
$237.68K 7,500 at 31.69
22.3%
Bought on a plan
30 Dec 2024
DORCHESTER MINERALS OPERATING LP Entity Under Common Control
Bought on a plan 3×
$31.66K 954 at 33.19
2.9%
Bought on a plan
26 Dec 2024
DORCHESTER MINERALS OPERATING LP Entity Under Common Control
Bought on a plan
$131.44K 4,000 at 32.86
13.9%
Bought on a plan
23 Dec 2024
DORCHESTER MINERALS OPERATING LP Entity Under Common Control
Bought on a plan 3×
$209.40K 6,500 at 32.21
29.2%
Bought on a plan
12 Dec 2024
DORCHESTER MINERALS OPERATING LP Entity Under Common Control
Bought on a plan 3×
$164.39K 5,005 at 32.85
29.1%
Bought on a plan
11 Dec 2024
DORCHESTER MINERALS OPERATING LP Entity Under Common Control
Bought on a plan 8×
$560.91K 16,995 at 33.00
×75
Bought on a plan
3 Dec 2024
EHRMAN BRADLEY J Chief Executive Officer
Bought
$496.54K 14,430 at 34.41
95.0%
Largest buy in 3 yrs
3 Dec 2024
MORIYAMA LESLIE A Chief Financial Officer
Bought
$414.64K 12,050 at 34.41
16.9%
Largest buy in 3 yrs
14 Nov 2024
MORIYAMA LESLIE A Chief Financial Officer
Bought
$104.91K 3,218 at 32.60
4.7%
19 Jul 2024
DORCHESTER MINERALS OPERATING LP Entity Under Common Control
Bought on a plan 3×
$93.46K 2,900 at 32.23
4.6%
Bought on a plan
17 Jul 2024
DORCHESTER MINERALS OPERATING LP Entity Under Common Control
Bought on a plan
$61.04K 1,878 at 32.50
3.1%
Bought on a plan
16 Jul 2024
DORCHESTER MINERALS OPERATING LP Entity Under Common Control
Bought on a plan 2×
$96.97K 3,000 at 32.32
5.1%
Bought on a plan
17 Jun 2024
EHRMAN BRADLEY J Chief Executive Officer · indirect
Bought
$82.60K 2,800 at 29.50
2.8%
22 May 2024
DORCHESTER MINERALS OPERATING LP Entity Under Common Control
Bought on a plan 5×
$125.59K 4,000 at 31.40
7.3%
Bought on a plan
21 May 2024
DORCHESTER MINERALS OPERATING LP Entity Under Common Control
Bought on a plan 5×
$191.27K 6,000 at 31.88
12.4%
Bought on a plan
17 May 2024
MORIYAMA LESLIE A Chief Financial Officer
Bought 2×
$77.14K 2,430 at 31.74
3.7%
2 Feb 2024
DORCHESTER MINERALS OPERATING LP Entity Under Common Control
Bought on a plan 2×
$39.40K 1,275 at 30.90
2.7%
Bought on a plan
30 Jan 2024
DORCHESTER MINERALS OPERATING LP Entity Under Common Control
Bought on a plan 4×
$158.32K 5,000 at 31.66
11.8%
Bought on a plan
25 Jan 2024
DORCHESTER MINERALS OPERATING LP Entity Under Common Control
Bought on a plan 8×
$250.98K 7,500 at 33.46
21.6%
Bought on a plan
26 Dec 2023
DORCHESTER MINERALS OPERATING LP Entity Under Common Control
Bought on a plan 8×
$156.96K 4,920 at 31.90
16.5%
Bought on a plan
22 Dec 2023
DORCHESTER MINERALS OPERATING LP Entity Under Common Control
Bought on a plan 6×
$191.16K 6,000 at 31.86
25.1%
Bought on a plan
21 Dec 2023
DORCHESTER MINERALS OPERATING LP Entity Under Common Control
Bought on a plan 4×
$79.81K 2,506 at 31.85
11.7%
Bought on a plan
20 Dec 2023
DORCHESTER MINERALS OPERATING LP Entity Under Common Control
Bought on a plan 14×
$472.97K 15,000 at 31.53
235%
Bought on a plan
19 Dec 2023
DORCHESTER MINERALS OPERATING LP Entity Under Common Control
Bought on a plan 5×
$196.67K 6,306 at 31.19
×94
Bought on a plan
10 Nov 2023
MORIYAMA LESLIE A Chief Financial Officer
Bought
$225.33K 8,013 at 28.12
16.3%
Largest buy in 3 yrs
10 Nov 2023
EHRMAN BRADLEY J Chief Executive Officer · indirect
Bought
$124.82K 4,453 at 28.03
5.3%
Largest buy in 3 yrs
14 Jun 2023
DORCHESTER MINERALS OPERATING LP Entity Under Common Control
Bought on a plan 5×
$145.52K 5,000 at 29.10
14.3%
Bought on a plan
31 May 2023
DORCHESTER MINERALS OPERATING LP Entity Under Common Control
Bought on a plan 4×
$71.29K 2,500 at 28.52
7.7%
Bought on a plan
Showing 1–50 of 154. Page 1 of 4 Older →