Dorchester Minerals, L.P. (DMLP) Insider Trading

Last 12 months

Insiders bought $607k on the open market and sold nothing.

Net open-market

+$607k

7 buys · 0 sales

Under a 10b5-1 plan

—

no sales

Insiders who bought / sold

4 / 0

executives and directors

Last open-market buy

Aug 2026

Aug 19, 2026

Get an email when DMLP's executives or directors buy, or make a large sale outside a plan.

Trades · last 2 years

Date	Insider	Trade	Shares	Price	Value	Of their stake	Filing
Aug 19	Leslie A Moriyama Chief Financial Officer	Bought	5,197	$28.30	$147k	5.3%	Form 4
Jun 1	Dorchester Minerals Operating LP Large holder	Bought 3 parts	7,500	$27.56 average	$207k	12%	Form 4
May 20	Dorchester Minerals Operating LP Large holder	Bought 2 parts	7,500	$28.30 average	$212k	14%	Form 4
May 12	Bradley J Ehrman Chief Executive Officer	Bought	4,000	$26.78	$107k	2.6%	Form 4
Feb 11 – 13	Dorchester Minerals Operating LP Large holder	Bought 3 parts	20,000	$25.24 average	$505k	57%	Form 4
Dec 19, 2025 – Dec 22, 2025	Dorchester Minerals Operating LP Large holder	Bought 2 parts	15,000	$22.28 average	$334k	75%	Form 4
Dec 17, 2025 – Dec 18, 2025	Dorchester Minerals Operating LP Large holder	Bought 2 parts	20,000	$22.26 average	$445k	117647%	Form 4
Dec 3, 2025	Frank Damon Box Director	Bought	5,000	$21.97	$110k	125%	Form 4
Nov 28, 2025	Robert C Vaughn Director	Bought	195	$21.36	$4k	0.5%	Form 4
Nov 25, 2025 – Nov 26, 2025	Bradley J Ehrman Chief Executive Officer	Bought 2 parts	3,487	$21.50 average	$75k	2.6%	Form 4
Nov 25, 2025	Robert C Vaughn Director	Bought 2 parts	4,615	$21.41 average	$99k	13%	Form 4
Nov 25, 2025	Leslie A Moriyama Chief Financial Officer	Bought	3,041	$21.50	$65k	3.8%	Form 4
Sep 5, 2025	Frank Damon Box Director	Bought	4,000	$25.57	$102k	New	Form 4
Apr 30, 2025	Dorchester Minerals Operating LP Large holder	Bought	10,000	$28.76	$288k	21%	Form 4
Mar 3, 2025	Bradley J Ehrman Chief Executive Officer	Bought	3,356	$29.80	$100k	2.6%	Form 4
Feb 6, 2025	Dorchester Minerals Operating LP Large holder	Bought	335	$31.06	$10k	0.7%	Form 4
Jan 31, 2025 – Feb 4, 2025	Dorchester Minerals Operating LP Large holder	Bought 2 parts	14,000	$31.32 average	$439k	42%	Form 4
Dec 30, 2024	Dorchester Minerals Operating LP Large holder	Bought 3 parts	954	$33.19 average	$32k	2.9%	Form 4
Dec 23, 2024 – Dec 26, 2024	Dorchester Minerals Operating LP Large holder	Bought 4 parts	10,500	$32.46 average	$341k	47%	Form 4
Dec 11, 2024 – Dec 12, 2024	Dorchester Minerals Operating LP Large holder	Bought 11 parts	22,000	$32.97 average	$725k	9649%	Form 4
Nov 14, 2024	Leslie A Moriyama Chief Financial Officer	Bought	3,218	$32.60	$105k	4.7%	Form 4

Aug 19
Leslie A Moriyama
Chief Financial Officer · bought 5,197 at $28.30
$147k
5.3% of stake
Jun 1
Dorchester Minerals Operating LP
Large holder · bought 7,500 at avg $27.56
$207k
12% of stake
May 20
Dorchester Minerals Operating LP
Large holder · bought 7,500 at avg $28.30
$212k
14% of stake
May 12
Bradley J Ehrman
Chief Executive Officer · bought 4,000 at $26.78
$107k
2.6% of stake
Feb 11 – 13
Dorchester Minerals Operating LP
Large holder · bought 20,000 at avg $25.24
$505k
57% of stake
Dec 19, 2025 – Dec 22, 2025
Dorchester Minerals Operating LP
Large holder · bought 15,000 at avg $22.28
$334k
75% of stake
Dec 17, 2025 – Dec 18, 2025
Dorchester Minerals Operating LP
Large holder · bought 20,000 at avg $22.26
$445k
117647% of stake
Dec 3, 2025
Frank Damon Box
Director · bought 5,000 at $21.97
$110k
125% of stake
Nov 28, 2025
Robert C Vaughn
Director · bought 195 at $21.36
$4k
0.5% of stake
Nov 25, 2025 – Nov 26, 2025
Bradley J Ehrman
Chief Executive Officer · bought 3,487 at avg $21.50
$75k
2.6% of stake
Nov 25, 2025
Robert C Vaughn
Director · bought 4,615 at avg $21.41
$99k
13% of stake
Nov 25, 2025
Leslie A Moriyama
Chief Financial Officer · bought 3,041 at $21.50
$65k
3.8% of stake
Sep 5, 2025
Frank Damon Box
Director · bought 4,000 at $25.57
$102k
New position
Apr 30, 2025
Dorchester Minerals Operating LP
Large holder · bought 10,000 at $28.76
$288k
21% of stake
Mar 3, 2025
Bradley J Ehrman
Chief Executive Officer · bought 3,356 at $29.80
$100k
2.6% of stake
Feb 6, 2025
Dorchester Minerals Operating LP
Large holder · bought 335 at $31.06
$10k
0.7% of stake
Jan 31, 2025 – Feb 4, 2025
Dorchester Minerals Operating LP
Large holder · bought 14,000 at avg $31.32
$439k
42% of stake
Dec 30, 2024
Dorchester Minerals Operating LP
Large holder · bought 954 at avg $33.19
$32k
2.9% of stake
Dec 23, 2024 – Dec 26, 2024
Dorchester Minerals Operating LP
Large holder · bought 10,500 at avg $32.46
$341k
47% of stake
Dec 11, 2024 – Dec 12, 2024
Dorchester Minerals Operating LP
Large holder · bought 22,000 at avg $32.97
$725k
9649% of stake
Nov 14, 2024
Leslie A Moriyama
Chief Financial Officer · bought 3,218 at $32.60
$105k
4.7% of stake

How to read this. Insiders sell for many reasons: taxes, diversifying, a house. Open-market buys are rarer and say more. A 10b5-1 plan is a trading schedule set up months in advance, so those sales were not timed on news. Large holders (funds and 10% owners) are listed under Everything but not counted as insiders. If you own or watch DMLP, we send a push when an executive buys or makes a large sale outside a plan.

Source: SEC Form 4 filings, filed within two business days of each trade and checked for new ones every hour.

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Spot a number that looks wrong? Check it in DMLP's SEC filings or

Download this analysis as a PDF (Pro)

Data sourced from SEC EDGAR filings and third-party price providers. Scores, valuations, and metrics are algorithmic estimates. This is not investment advice. See our Terms and Methodology.

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