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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.

Overview All Filings Annual Quarterly Insiders
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