DMLP insider buying and SEC filings, explained
Dorchester Minerals, L.P. · CIK 1172358
Tracked: Forms 3/4/5, 8-K, NT · All filings on sec.gov
Company profile
- Exchanges
- Nasdaq
- Industry (SIC)
- Crude Petroleum & Natural Gas
- State of incorporation
- DE
- Fiscal year end
- Dec 31
- Former names
- DORCHESTER MINERALS LP
Insider activity in the last 12 months
Bought
$603K
Insiders who bought
4
Sold (not marked 10b5-1)
$0
Planned sales (10b5-1)
$0
Insider purchases and sales, last 12 months
| Traded | Type | What was filed | Source |
|---|---|---|---|
| Aug 19, 2026 | Purchase (code P) | Leslie A. Moriyama (CFO) bought 5,197 shares at $28.30 ($147K), reported as a purchase (code P). Holdings up 5% to 103,405 shares. Not marked as a 10b5-1 plan trade. | SEC filing Filed Aug 19, 2026 |
| Jun 1, 2026 | Purchase (code P) | DORCHESTER MINERALS OPERATING LP (Entity Under Common Control) bought 7,500 shares at about $27.56 ($207K), reported as a purchase (code P). Holdings up 12% to 70,017 shares. | SEC filing Filed Jun 2, 2026 |
| May 20, 2026 | Purchase (code P) | DORCHESTER MINERALS OPERATING LP (Entity Under Common Control) bought 7,500 shares at about $28.30 ($212K), reported as a purchase (code P). Holdings up 14% to 62,517 shares. | SEC filing Filed May 22, 2026 |
| May 12, 2026 | Purchase (code P) | Bradley J. Ehrman (CEO) bought 4,000 shares indirectly at $26.78 ($107K), reported as a purchase (code P). Indirect holdings up 3% to 142,723 shares. Not marked as a 10b5-1 plan trade. | SEC filing Filed May 12, 2026 |
| Feb 11–13, 2026 | Purchase (code P) | DORCHESTER MINERALS OPERATING LP (Entity Under Common Control) bought 20,000 shares between Feb 11 and Feb 13 at about $25.24 ($505K), reported as a purchase (code P). Holdings up 57% to 55,017 shares. | SEC filing Filed Feb 13, 2026 |
| Dec 19–22, 2025 | Purchase (code P) | DORCHESTER MINERALS OPERATING LP (Entity Under Common Control) bought 15,000 shares between Dec 19, 2025 and Dec 22, 2025 at about $22.28 ($334K), reported as a purchase (code P). Holdings up 75% to 35,017 shares. | SEC filing Filed Dec 23, 2025 |
| Dec 17–18, 2025 | Purchase (code P) | DORCHESTER MINERALS OPERATING LP (Entity Under Common Control) bought 20,000 shares between Dec 17, 2025 and Dec 18, 2025 at about $22.26 ($445K), reported as a purchase (code P). Holdings up 999%+ to 20,017 shares. | SEC filing Filed Dec 19, 2025 |
| Dec 3, 2025 | Purchase (code P) | Frank Damon Box (Director) bought 5,000 shares at $21.97 ($110K), reported as a purchase (code P). Holdings up 125% to 9,000 shares. Not marked as a 10b5-1 plan trade. | SEC filing Filed Dec 3, 2025 |
| Nov 28, 2025 | Purchase (code P) | Robert C. Vaughn (Director) bought 195 shares at $21.36 ($4K), reported as a purchase (code P). Holdings up 1% to 20,547 shares. Not marked as a 10b5-1 plan trade. | SEC filing Filed Dec 2, 2025 |
| Nov 25, 2025 | Purchase (code P) | Robert C. Vaughn (Director) bought 4,615 shares at about $21.41 ($99K), reported as a purchase (code P). Holdings up 29% to 20,352 shares. Not marked as a 10b5-1 plan trade. | SEC filing Filed Nov 28, 2025 |
| Nov 25, 2025 | Purchase (code P) | Leslie A. Moriyama (CFO) bought 3,041 shares at $21.50 ($65K), reported as a purchase (code P). Holdings up 4% to 83,673 shares. Not marked as a 10b5-1 plan trade. | SEC filing Filed Nov 28, 2025 |
| Nov 25–26, 2025 | Purchase (code P) | Bradley J. Ehrman (CEO) bought 3,487 shares indirectly between Nov 25, 2025 and Nov 26, 2025 at about $21.50 ($75K), reported as a purchase (code P). Indirect holdings up 3% to 121,197 shares. Not marked as a 10b5-1 plan trade. | SEC filing Filed Nov 26, 2025 |
7 routine transactions (such as grants, option exercises or tax withholding) are not listed.
Cluster buys
4 insiders bought in 30 days
$349K in purchases since Nov 25, 2025 · Purchases traded Nov 25, 2025 to Dec 3, 2025 · Closed
| Insider | Value | Traded | Source |
|---|---|---|---|
| Leslie A. Moriyama (CFO) | $65K | Nov 25, 2025 | SEC filing |
| Robert C. Vaughn (Director) | $99K | Nov 25, 2025 | SEC filing |
| Bradley J. Ehrman (CEO) | $75K | Nov 26, 2025 | SEC filing |
| Frank Damon Box (Director) | $110K | Dec 3, 2025 | SEC filing |
Red flags
No red flags in the last 12 months.
Key events
No key events in the last 12 months.
8-K filings, last 12 months
| Filed | Items | Tag | Source |
|---|---|---|---|
| Nov 2, 2026, 6:01 AM ET 8-K | Acquisition or disposal completed (Item 2.01) Reg FD disclosure (Item 7.01) | SEC filing |
Red flags are objective triggers only: the item or form filed, never an opinion.
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