Insider trading

Period: 120 months Stock: DMLP 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.

20 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.

20 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.

20 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.

20 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.
20 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
20 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.

20 decisions over 120 months
Stock
Insider
Type ?
Why it stands out
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
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
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
2 Mar 2023
DORCHESTER MINERALS OPERATING LP Entity Under Common Control
Bought 5×
$216.38K 7,000 at 30.91
70.2%
+70% of stake
6 Dec 2022
DORCHESTER MINERALS OPERATING LP Entity Under Common Control
Bought 10×
$571.75K 20,000 at 28.59
223%
Largest buy in 3 yrs
20 Apr 2021
DORCHESTER MINERALS OPERATING LP Entity Under Common Control
Bought 3×
$63.88K 4,500 at 14.20
50.4%
+50% of stake
19 Apr 2021
DORCHESTER MINERALS OPERATING LP Entity Under Common Control
Bought 4×
$64.04K 4,500 at 14.23
102%
First buy on file
20 Apr 2020
DORCHESTER MINERALS OPERATING LP Entity Under Common Control
Bought 16×
$153.25K 15,000 at 10.22
53.5%
First buy on file
6 Mar 2020
Rochelle Martha Director · indirect
Sold, plan not stated 2×
$398.33K 29,344 at 13.57
100%
Sold half or more
24 Jan 2018
DORCHESTER MINERALS OPERATING LP Entity Under Common Control
Bought 4×
$190.48K 11,500 at 16.56
89.5%
First buy on file
7 Sep 2017
DORCHESTER MINERALS OPERATING LP Entity Under Common Control
Bought 4×
$181.02K 12,500 at 14.48
83.6%
First buy on file
6 Sep 2017
DORCHESTER MINERALS OPERATING LP Entity Under Common Control
Bought 4×
$83.93K 5,800 at 14.47
63.4%
First buy on file
30 Jun 2017
MCMANEMIN WILLIAM CASEY Chief Executive Officer · indirect
Bought
$2.26M 150,808 at 14.98
72.0%
First buy on file
30 Jun 2017
ALLEN H C JR Director · indirect
Bought
$288.39K 19,252 at 14.98
88.0%
First buy on file
30 Jun 2017
RALEY JAMES E Vice Chairman
Bought
$288.39K 19,252 at 14.98
148%
First buy on file
30 Jun 2017
MORIYAMA LESLIE A Chief Financial Officer
Bought
$96.13K 6,417 at 14.98
157%
First buy on file
Showing 1–20 of 20.