DORCHESTER MINERALS, L.P. — Insider Transactions
Form 4 filings by directors, officers, and 10%+ shareholders
SEC rules require corporate insiders — including directors, executive officers, and any shareholder owning more than 10% of a company's shares — to report changes in their ownership within two business days of a transaction. These disclosures are filed as Form 4. Open-market purchases (code P) are generally considered the most meaningful signal, as insiders are spending their own money.
| Insider | Title | Type | Shares | Price | Value | Owns After | Date |
|---|---|---|---|---|---|---|---|
| DORCHESTER MINERALS OPERATING LP | — | Purchase | 5,000 | $22.23 | $111,150 | 25,017 | Dec 22, 2025 |
| DORCHESTER MINERALS OPERATING LP | — | Purchase | 4,271 | $22.19 | $94,773 | 4,288 | Dec 18, 2025 |
| MORIYAMA LESLIE A | Chief Financial Officer | Tax Withholding | 1,756 | — | — | 98,208 | Dec 15, 2025 |
| EHRMAN BRADLEY J | Chief Executive Officer | Option Exercise | 4,727 | — | — | 34,437 | Dec 15, 2025 |
| MORIYAMA LESLIE A | Chief Financial Officer | Option Exercise | 4,017 | — | — | 97,234 | Dec 3, 2025 |
| EHRMAN BRADLEY J | Chief Executive Officer | Tax Withholding | 1,749 | — | — | 29,710 | Dec 3, 2025 |
| Box Frank Damon | — | Purchase | 5,000 | $21.97 | $109,850 | 9,000 | Dec 3, 2025 |
| MORIYAMA LESLIE A | Chief Financial Officer | Tax Withholding | 6,456 | $21.63 | $139,643 | 93,217 | Dec 1, 2025 |
| EHRMAN BRADLEY J | Chief Executive Officer | Tax Withholding | 6,543 | $21.63 | $141,525 | 26,649 | Dec 1, 2025 |
| VAUGHN ROBERT C | — | Purchase | 195 | $21.36 | $4,165 | 20,547 | Nov 28, 2025 |
| DORCHESTER MINERALS OPERATING LP | — | Other | 58,000 | $21.95 | $1,273,100 | 17 | Nov 28, 2025 |
| VAUGHN ROBERT C | — | Purchase | 352 | $21.39 | $7,529 | 20,352 | Nov 25, 2025 |
| MORIYAMA LESLIE A | Chief Financial Officer | Purchase | 3,041 | $21.50 | $65,382 | 83,673 | Nov 25, 2025 |
| EHRMAN BRADLEY J | Chief Executive Officer | Purchase | 2,487 | $21.60 | $53,719 | 121,197 | Nov 25, 2025 |
| Box Frank Damon | — | Purchase | 4,000 | $25.57 | $102,280 | 4,000 | Sep 5, 2025 |
| DORCHESTER MINERALS OPERATING LP | — | Purchase | 10,000 | $28.76 | $287,600 | 58,017 | Apr 30, 2025 |
| EHRMAN BRADLEY J | Chief Executive Officer | Purchase | 3,356 | $29.80 | $100,009 | 117,710 | Mar 3, 2025 |
| DORCHESTER MINERALS OPERATING LP | — | Purchase | 335 | $31.06 | $10,405 | 48,017 | Feb 6, 2025 |
| DORCHESTER MINERALS OPERATING LP | — | Purchase | 7,500 | $31.69 | $237,675 | 41,182 | Feb 4, 2025 |
| DORCHESTER MINERALS OPERATING LP | — | Purchase | 940 | $33.19 | $31,199 | 33,678 | Dec 30, 2024 |
| DORCHESTER MINERALS OPERATING LP | — | Purchase | 4,000 | $32.86 | $131,440 | 32,728 | Dec 23, 2024 |
| MORIYAMA LESLIE A | Chief Financial Officer | Tax Withholding | 1,626 | — | — | 80,632 | Dec 13, 2024 |
| DORCHESTER MINERALS OPERATING LP | — | Purchase | 1,000 | $32.84 | $32,840 | 22,228 | Dec 11, 2024 |
| MORIYAMA LESLIE A | Chief Financial Officer | Award / Grant | 12,050 | — | — | 83,450 | Dec 3, 2024 |
| EHRMAN BRADLEY J | Chief Executive Officer | Award / Grant | 14,430 | — | — | 29,622 | Dec 3, 2024 |
| EHRMAN BRADLEY J | Chief Executive Officer | Tax Withholding | 1,861 | — | — | 26,809 | Dec 3, 2024 |
| MORIYAMA LESLIE A | Chief Financial Officer | Purchase | 12,050 | $34.41 | $414,640 | 83,450 | Dec 3, 2024 |
| EHRMAN BRADLEY J | Chief Executive Officer | Purchase | 14,430 | $34.41 | $496,536 | 29,622 | Dec 3, 2024 |
| DORCHESTER MINERALS OPERATING LP | — | Other | 66,124 | $34.41 | $2,275,327 | 228 | Dec 3, 2024 |
| MORIYAMA LESLIE A | Chief Financial Officer | Purchase | 3,218 | $32.60 | $104,907 | 71,400 | Nov 14, 2024 |
| DORCHESTER MINERALS OPERATING LP | — | Purchase | 900 | $32.20 | $28,980 | 66,352 | Jul 19, 2024 |
| DORCHESTER MINERALS OPERATING LP | — | Purchase | 1,000 | $32.31 | $32,310 | 61,574 | Jul 16, 2024 |
| EHRMAN BRADLEY J | Chief Executive Officer | Purchase | 2,800 | $29.50 | $82,600 | 102,737 | Jun 17, 2024 |
| DORCHESTER MINERALS OPERATING LP | — | Purchase | 1,000 | $31.46 | $31,460 | 57,674 | May 22, 2024 |
| MORIYAMA LESLIE A | Chief Financial Officer | Purchase | 1,430 | $31.81 | $45,488 | 67,182 | May 17, 2024 |
| MCMANEMIN WILLIAM CASEY | Chairman of the Board | Gift | 25,000 | — | — | 706,481 | Apr 5, 2024 |
| DORCHESTER MINERALS OPERATING LP | — | Purchase | 96 | $30.95 | $2,971 | 47,395 | Feb 2, 2024 |
| DORCHESTER MINERALS OPERATING LP | — | Purchase | 1,000 | $31.74 | $31,740 | 47,299 | Jan 30, 2024 |
| DORCHESTER MINERALS OPERATING LP | — | Purchase | 1,000 | $33.50 | $33,500 | 38,799 | Jan 25, 2024 |
| DORCHESTER MINERALS OPERATING LP | — | Purchase | 61 | $31.88 | $1,945 | 33,719 | Dec 26, 2023 |
| DORCHESTER MINERALS OPERATING LP | — | Purchase | 1,500 | $31.86 | $47,790 | 27,296 | Dec 22, 2023 |
| DORCHESTER MINERALS OPERATING LP | — | Purchase | 824 | $31.59 | $26,030 | 12,373 | Dec 20, 2023 |
| MORIYAMA LESLIE A | Chief Financial Officer | Tax Withholding | 4,416 | $31.03 | $137,028 | 65,752 | Dec 15, 2023 |
| EHRMAN BRADLEY J | Chief Executive Officer | Award / Grant | 14,180 | $31.03 | $440,005 | 29,372 | Dec 15, 2023 |
| DORCHESTER MINERALS OPERATING LP | — | Other | 39,900 | $31.03 | $1,238,097 | 67 | Dec 15, 2023 |
| MORIYAMA LESLIE A | Chief Financial Officer | Purchase | 8,013 | $28.12 | $225,326 | 57,116 | Nov 10, 2023 |
| EHRMAN BRADLEY J | Chief Executive Officer | Purchase | 4,453 | $28.03 | $124,818 | 89,210 | Nov 10, 2023 |
| DORCHESTER MINERALS OPERATING LP | — | Purchase | 500 | $29.05 | $14,525 | 39,967 | Jun 14, 2023 |
| DORCHESTER MINERALS OPERATING LP | — | Purchase | 500 | $28.65 | $14,325 | 25,467 | May 30, 2023 |
| DORCHESTER MINERALS OPERATING LP | — | Purchase | 500 | $28.02 | $14,010 | 21,467 | Mar 22, 2023 |