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DMLP DORCHESTER MINERALS, L.P. Insider Trading

Latest: CEO Bought $107K of Shares · May 2026

Multiple insiders have been active at DORCHESTER MINERALS, L.P. (DMLP): 5 distinct insiders account for 25 buy filings and 0 sell filings as of Jun 2026. Its highest-significance filing in the last 90 days: CEO Bradley J Ehrman bought $107K, transaction dated May 2026.

25 filings analyzed · Latest 2026-06-02

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Buys
25
Sells
0
Insiders
5
Direction
Net buying

DORCHESTER MINERALS, L.P. leadership

COO
Bradley J. Ehrman — Chief Operating Officer
Chair
Robert C. Vaughn — Chairman
June 2026
2026-06-02 10b5-1 Plan
low
7,500 shares
$206,720
@ $27.56
Significance 3

Dorchester Minerals Operating LP purchases 7,500 shares for $206,719.88 under scheduled 10b5-1 plan at DMLP

Dorchester Minerals Operating LP executed 3 separate purchases totaling 7,500 shares for $206,719.88, raising its holdings to 70,017 shares from 62,517 shares. This transaction is part of a pre-arranged 10b5-1 trading plan, meaning it was scheduled rather than discretionary. At DMLP specifically, the insider's prior 5 trades show mixed outcomes: two recent May purchases declined 2.3% and 2.0% over 30 days, while three February purchases rose 6.6%–7.5%. With annual revenue declining 5.4% year-over-year and the current stock price down 3.1% from its 52-week high, the buy occurs in a period of moderate headwinds for the company. The scheduled nature of this purchase and its modest significance relative to the insider's position preclude attribution to discretionary conviction.

May 2026
2026-05-22 10b5-1 Plan
medium
7,500 shares
$212,280
@ $28.30
Significance 5

Dorchester Minerals Operating LP buys 7,500 shares for $212,280 in scheduled 10b5-1 plan transaction

Dorchester Minerals Operating LP executed two purchases totaling 7,500 shares for $212,280.00 at a blended average price of $28.30 on 2026-05-20. This transaction was conducted pursuant to a pre-arranged 10b5-1 trading plan, meaning it was scheduled rather than discretionary. The current stock price of $27.47 is 5.1% below the 52-week high, and this purchase adds to the insider's holdings, which increased from 55,017 to 62,517 shares (+13.6%). While the insider's prior trades at DMLP have shown positive average returns over both 30-day and 90-day windows (ranging from +4.4% to +7.9% over 30 days, and +7.4% to +23.6% over 90 days), this particular transaction is schedule-driven rather than discretionary, so it does not reflect independent conviction timing. The stock trades at a P/E of 19.21 with recent annual revenue decline of -5.4%, warranting attention to fundamental momentum.

2026-05-12
high
Chief Executive Officer
4,000 shares
$107,120
@ $26.78
Significance 7

CEO Bradley Ehrman purchases 4,000 shares at market; 7th open-market buy in 36 months, all prior DMLP buys showed near-term gains despite mixed longer-term results.

Bradley Ehrman, Dorchester Minerals' CEO, is buying shares again while the stock trades well below its 52-week high, extending a pattern of sustained accumulation. This is his seventh open-market purchase in the past three years and reflects continued conviction despite the stock's recent pullback. His five prior purchases at this company all generated gains within the first month, though results beyond that were mixed—some recovered to strong gains while others gave back those short-term advances. The company itself remains profitable with solid revenue, though it has faced year-over-year revenue headwinds, making this purchase notable as buying into a company navigating near-term headwind. For a CEO who has shown consistent appetite for open-market purchases and demonstrated profitable near-term timing on prior buys at this exact stock, this trade at reduced prices suggests continued belief in the opportunity ahead.

February 2026
2026-02-13 10b5-1 Plan
medium
20,000 shares
$504,750
@ $25.24
Significance 5

Dorchester Minerals Operating LP acquired 20,000 shares (20.0K) for $504,750.00 in 3 trades over 3 days at blended $25.24/share.

Dorchester Minerals Operating LP completed 3 separate purchases totaling 20,000 shares for $504,750.00 between February 11–13, 2026, raising its holdings from 35,017 shares to 55,017 shares (+57.1% vs pre-transaction). The blended purchase price was $25.24/share versus the current price of $25.48, representing a modest gain of 0.9% at current levels. The 30-day and 90-day price momentum show gains of +7.4% and +7.9% respectively, though the stock remains -21.4% from its 52-week high of $32.42. The insider's prior same-ticker purchases (5 trades at DMLP in December 2025 and April 2025) have been recently positive on the 30-day measure but historically weak on the 90-day measure, with a timing win rate of 0 out of 1 measurable prior 90-day outcomes. Notably, the cross-ticker track record shows a 0.00% 90-day win rate across 20 prior buys, suggesting a pattern of unfavorable longer-term post-trade performance.

December 2025
2025-12-23 10b5-1 Plan
medium
15,000 shares
$334,124
@ $22.27
Significance 4

Insider bought 15,000 shares at average $22.27; current price $22.16 reflects recent 36.1% decline from 52-week high.

DORCHESTER MINERALS OPERATING LP purchased 15,000 shares in 2 transactions totaling $334,124.00, increasing holdings by 74.9% from 20,017 to 35,017 shares. The purchases occurred at $22.23 on 2025-12-19 and $22.30 on 2025-12-22, near the current price of $22.16, but well below the 52-week high of $34.68. The stock has declined 36.1% from its 52-week peak and 13.3% over 90 days. Examining prior trades at DMLP, the insider's 3 measurable same-ticker buys posted negative 90-day returns (-6.9%, -2.8%, -12.5%), with 0 of 3 well-timed, suggesting a historical pattern of buying before further declines at this holding. Fundamentals show revenue of $35,416,000.00 for the latest quarter with annual growth of -1.4% and a P/E of 19.27, placing the stock neither obviously undervalued nor in acute distress, though the concentration of buying volume in mid-December coincides with peak price weakness, warranting close observation of subsequent quarterly results.

2025-12-19 10b5-1 Plan
medium
20,000 shares
$445,216
@ $22.26
Significance 4

Insider DORCHESTER MINERALS OPERATING LP purchases 20,000 shares in 2 transactions ($445,215.66) in DMLP, boosting holdings to 20,017 shares from 17.

DORCHESTER MINERALS OPERATING LP, an insider, executed 2 separate purchases totaling 20,000 shares for $445,215.66 at blended average price $22.26 on 2025-12-17 and 2025-12-18, with the post-transaction holding rising to 20,017 shares from a pre-transaction position of 17 shares. The stock has declined 36.0% from its 52-week high of $34.68 and is down 3.6% over the past 30 days and 12.3% over 90 days. However, the insider's prior 5 trades at DMLP show a 0% well-timed rate at the 90-day mark; the 4 prior measurable buys at this ticker all posted negative 90-day returns ranging from -2.8% to -12.5%. The broader cross-ticker track record similarly shows a 0% 90-day win rate across 20 prior open-market buys with an average 90-day return of -8.5%, suggesting consistent difficulty in timing market entry points. Fundamentally, the company reported $35.4M quarterly revenue and $11.2M net income with flat annual revenue growth of -1.4%, and trades at a P/E of 19.30.

2025-12-03
medium
5,000 shares
$109,825
@ $21.96
Significance 5

Director Box Frank Damon bought 5,000 shares of DMLP at $21.96, raising holding to 9,000 shares (+125.0%); stock -36.0% from 52-week high amid cluster buying.

Director Box Frank Damon purchased 5,000 shares at $21.96 on 2025-12-03, expanding his stake from 4,000 to 9,000 shares, a 125.0% increase. The transaction occurred as DORCHESTER MINERALS trades at $22.18, down 36.0% from its 52-week high of $34.68 and down 12.8% over 90 days, representing a depressed entry point relative to recent price history. The filing coincides with a cluster pattern: 3 other insiders also bought within the past 14 days, suggesting coordinated confidence at current valuations. Fundamentals show revenue of $35,416,000.00 (latest quarter) and net income of $11,173,000.00 with annual revenue growth of -1.4%, so the purchasing activity occurs amid modest revenue headwinds. Damon's cross-ticker track record shows 1 prior buy with a 30d return of -0.8%, and his prior DMLP transaction (2025-09-05 buy) also showed -0.8% 30d return; his historical timing has not demonstrated predictive accuracy at the 90-day mark.

2025-12-02
low
195 shares
$4,165
@ $21.36
Significance 4

Director Robert C Vaughn buys 195 DMLP shares at $21.36; stock -37.9% from 52-week high amid cluster buy activity

Director Robert C Vaughn purchased 195 shares of Dorchester Minerals at $21.36 on 2025-11-28, bringing holdings to 20,547 shares. The purchase occurs against a backdrop of significant price deterioration—the stock trades at -37.9% from its 52-week high of $34.68 and has declined 14.7% over the past 30 and 90 days. The fundamentals show modest strength (net income of $11.2M on revenue of $35.4M, P/E of 18.74), but annual revenue growth is negative at -1.4%. Notably, two other insiders also bought within the past 14 days, creating a cluster buy pattern. However, the insider's cross-ticker track record shows only 2 prior buys, and at DMLP specifically, two recent buys on 2025-11-25 have not yet accumulated measurable 90-day returns, limiting the ability to assess timing consistency.

November 2025
2025-11-28
medium
Chief Financial Officer
3,041 shares
$65,382
@ $21.50
Significance 4

CFO Moriyama buys 3,041 DMLP shares at $21.50; stock down -36.7% from 52-week high, cluster buy pattern detected

Leslie Moriyama (CFO) purchased 3,041 shares of Dorchester Minerals at $21.50, increasing holdings to 83,673 shares. The transaction occurred when the stock trades -36.7% below its 52-week high and down -12.2% over 30 days. Notably, 2 other insiders also bought within the past 14 days, forming a cluster acquisition pattern. However, Moriyama's prior buy timing at this ticker shows mixed results: only 1 of 5 previous purchases generated positive 90-day returns (20% timing success rate at DMLP), with the most recent December 2024 purchase still underwater at -15.2% over 90 days. Against depressed near-term price momentum, the multi-insider buying activity is noteworthy, though the stock remains -12.8% over 90 days from a fundamentals perspective where revenue growth sits at -1.4% year-over-year.

2025-11-28
medium
4,615 shares
$98,800
@ $21.41
Significance 5

Director Robert C. Vaughn buys 4,615 shares for $98,800.11 at DMLP; stake rises to 20,352 shares

Robert C. Vaughn, a director at Dorchester Minerals, executed 2 separate purchases totaling 4,615 shares for $98,800.11 on 2025-11-25, raising his holdings by 29.3% from 15,737 to 20,352 shares. The stock has declined 36.7% from its 52-week high of $34.68 and is currently at $21.94, down 12.2% over the past 30 days. A cluster pattern is present: 2 other insiders also bought within the past 14 days, suggesting coordinated accumulation at depressed levels. The company's fundamentals show $35.4M in quarterly revenue, $11.2M in net income, and a P/E of 19.08, providing a baseline of profitability, though annual revenue growth is negative at -1.4%.

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