Dorchester Minerals DMLP Insider Ownership

NASDAQ DMLP

$30.16 +0.11 (+0.37%)

At close: Oct 20, 2026 · 4:00 PM EDT

Insider Holdings by Owner

1.05Mn Shares

Insider Ownership Statistics

as of 30 Sep, 2026

Insider Ownership

1.79%

▲+0.011% pp QoQ

Shares Held by Insiders

880.89K

filed for Sep 2026

▲+0.59% QoQ

Shares Outstanding

49.09Mn

49,091,408 shares

Direct Holdings

218.16K

Indirect: 662.72K

Net Shares Traded (QoQ)

+5.20K

net buying in Sep 2026

Insiders Holding Shares

with Form 4 holdings on file

Shares Owned by Insiders

Shares held % of outstanding

Latest —

Average ownership —

Peak ownership —

Shares Purchased/Sold by Insiders

Bought Sold

Latest quarter —

Net over range —

Buying quarters —

Insider Ownership Summary

Updated Oct 10, 2026

Over the trailing 12 months, DMLP insiders bought $2.31 million worth of shares (95.53K shares) in open-market trades, with no open-market sales.

Behind Dorchester Minerals' open-market purchases in the past 12 months were 5 insiders, and no insider sold.
Among Dorchester Minerals insiders, Dorchester Minerals Operating LP led open-market buying over the past 12 months with $1.7 million of purchases (70K shares); the latest was on June 1, 2026.
Leslie A. Moriyama (Chief Financial Officer) made the most recent open-market trade by an insider of Dorchester Minerals, a purchase of 5.2K shares for $147,075 on August 19, 2026.
Apart from open-market trades, DMLP insiders received 34K shares in stock awards, acquired 17.91K shares through option exercises and conversions and gave up 19.84K shares to cover taxes or exercise prices in the past 12 months.
Business Quant data shows Dorchester Minerals insiders holding 880.88K shares in total in their latest Form 4 filings, up 0.59% from 875.69K shares at the end of Q2 2026.
Direct holdings account for 218.16K shares (24.77%) of DMLP's insider total, and indirect holdings through trusts, partnerships and family members for 662.72K shares (75.23%).
DMLP's insider total is spread across 5 insiders who have filed a Form 4 in the past two years.
Dorchester Minerals' top three insider holders by shares held are Robert C. Vaughn (Director, 540.55K shares), Bradley J. Ehrman (Chief Executive Officer, 157.91K shares) and Leslie A. Moriyama (Chief Financial Officer, 103.41K shares).
Of the shares held by DMLP insiders, 61.36% belong to Robert C. Vaughn.
Institutions held 22.88% of Dorchester Minerals' outstanding shares in their Q2 2026 13F filings, insiders about 1.79% based on their latest Form 4 filings, and other investors, including the public, the remaining 75.33%.
Over the past 12 months, 5 insiders reported transactions in Dorchester Minerals stock in 19 Form 4 filings.
Insider figures for DMLP include Form 4 filings through August 19, 2026.

Form 4 Holdings

Insiders Holding DMLP

Insiders 6

Shares held 1.05Mn

Of outstanding 2.14%

#	Insider	Position	Direct	Indirect	Total	Share of Insiders	Last Filed
1	William Casey Mcmanemin	Chairman Of The Board	706,481	0	706,481	67.1%	11 Apr, 2024
2	Bradley J Ehrman	Chief Executive Officer	0	142,723	142,723	13.6%	12 May, 2026
3	Leslie A Moriyama	Chief Financial Officer	103,405	0	103,405	9.8%	19 Aug, 2026
4	Minerals Operating Lp Dorchester	Other	70,017	0	70,017	6.7%	02 Jun, 2026
5	Robert C Vaughn	Director	20,547	0	20,547	2.0%	02 Dec, 2025
6	Frank Damon Box	Director	9,000	0	9,000	0.9%	03 Dec, 2025

Each row is that insider’s most recently reported position, from Form 4 filings over the last 60 months — which is why this total does not tie to the quarterly series above, where a quarter counts only the insiders who filed in it. Shares held through a fund or institutional portfolio are counted on the institutional ownership page instead.

Form 4 Filings

738 Insider Transactions

Source SEC Form 4

Latest quarter Sep 2026

Date	Insider	Position	Transaction	Shares	Price	Value	Shares Held After	Ownership
19 Aug, 2026	Leslie A Moriyama	Chief Financial Officer	Acquired P	5,197	$28.30	$147.08K	103,405	Direct
01 Jun, 2026	Minerals Operating Lp Dorchester	Other	Acquired P	2,500	$27.64	$69.10K	65,017	Direct
01 Jun, 2026	Minerals Operating Lp Dorchester	Other	Acquired P	999	$27.62	$27.59K	66,016	Direct
01 Jun, 2026	Minerals Operating Lp Dorchester	Other	Acquired P	4,001	$27.50	$110.03K	70,017	Direct
20 May, 2026	Minerals Operating Lp Dorchester	Other	Acquired P	1,500	$28.24	$42.36K	56,517	Direct
20 May, 2026	Minerals Operating Lp Dorchester	Other	Acquired P	6,000	$28.32	$169.92K	62,517	Direct
12 May, 2026	Bradley J Ehrman	Chief Executive Officer	Acquired P	4,000	$26.78	$107.12K	142,723	Indirect
11 Feb, 2026	Minerals Operating Lp Dorchester	Other	Acquired P	10,000	$25.29	$252.90K	45,017	Direct
12 Feb, 2026	Minerals Operating Lp Dorchester	Other	Acquired P	5,000	$25.08	$125.40K	50,017	Direct
13 Feb, 2026	Minerals Operating Lp Dorchester	Other	Acquired P	5,000	$25.29	$126.45K	55,017	Direct
19 Dec, 2025	Minerals Operating Lp Dorchester	Other	Acquired P	5,000	$22.23	$111.13K	25,017	Direct
22 Dec, 2025	Minerals Operating Lp Dorchester	Other	Acquired P	10,000	$22.30	$222.99K	35,017	Direct
17 Dec, 2025	Minerals Operating Lp Dorchester	Other	Acquired P	4,271	$22.19	$94.79K	4,288	Direct
18 Dec, 2025	Minerals Operating Lp Dorchester	Other	Acquired P	15,729	$22.28	$350.42K	20,017	Direct
15 Dec, 2025	Leslie A Moriyama	Chief Financial Officer	Acquired M	4,351	$0.00	$0	99,964	Direct
15 Dec, 2025	Leslie A Moriyama	Chief Financial Officer	Disposed F	1,756	$0.00	$0	98,208	Direct
15 Dec, 2025	Bradley J Ehrman	Chief Executive Officer	Acquired M	4,727	$0.00	$0	34,437	Direct
15 Dec, 2025	Leslie A Moriyama	Chief Financial Officer	Disposed M	4,351	$0.00	$0	4,350	Direct
15 Dec, 2025	Bradley J Ehrman	Chief Executive Officer	Disposed F	1,719	$0.00	$0	32,718	Direct
15 Dec, 2025	Bradley J Ehrman	Chief Executive Officer	Disposed M	4,727	$0.00	$0	4,726	Direct

Showing 1 to 20 of 738 transactions