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Filing Details

Issuer

Cik	Name	Symbol	Sector (SIC)	IRS No
1172358	Dorchester Minerals L.p.	DMLP	Crude Petroleum & Natural Gas (1311)	810551518

Insiders

Cik	Name	Reported Address	Insider Title	Director	Officer	Large Shareholder	Other
1203847	C Robert Vaughn	6116 N. Central Expressway Suite 1440 Dallas TX 75206		Yes	No	No	No

Reported Non-Derivative Transactions

Sec. Name	Acquisiton - Disposition	Date	Amount	Price	Remaning Holdings	Equity Swap Involved	Form Type	Code	Nature of Ownership	Explanation
Common Units	Acquisiton	2017-12-19	2,000	$14.59	486,735	No	4	P	Indirect	.
Common Units	Acquisiton	2017-12-19	475	$14.64	487,210	No	4	P	Indirect	.
Common Units	Acquisiton	2017-12-19	200	$14.58	10,937	No	4	P	Direct
Common Units	Acquisiton	2017-12-19	2,398	$14.60	13,335	No	4	P	Direct
Common Units	Acquisiton	2017-12-19	700	$14.60	14,035	No	4	P	Direct
Common Units	Acquisiton	2017-12-19	1,702	$14.60	15,737	No	4	P	Direct

Equity Swap Involved	Form Type	Code	Nature of Ownership	Explanation
No	4	P	Indirect	.
No	4	P	Indirect	.
No	4	P	Direct
No	4	P	Direct
No	4	P	Direct
No	4	P	Direct

Reported Non-Derivative Holdings

Sec. Name	Remaning Holdings	Nature of Ownership	Explanation
Common Units	20,001	Indirect	.

Footnotes

These common units are held by Vaughn Petroleum (DMLP), LLC. Mr. Vaughn and his spouse are the only unit holders of Vaughn Petroleum (DMLP), LLC.
These common units are held by Mr. Vaughn in his individual name, IRA or Keogh Plan.
These common units are held by Empire Partners, Ltd. Mr. Vaughn is the President of Empire (GP), Inc., the general partner of Empire Partners, Ltd. Mr. Vaughn and his spouse are the shareholders of Empire (GP), Inc. Mr. Vaughn disclaims beneficial ownership of such common units, except to the extent of his pecuniary interest therein.