| SC 13G/A | 2018-02-12 | LEFRAK RICHARD S | DORCHESTER MINERALS, L.P. | 125,732 | - | EDGAR |
| SC 13G/A | 2017-01-31 | LEFRAK RICHARD S | DORCHESTER MINERALS, L.P. | 2,805,022 | 9.1% | EDGAR |
| SC 13G/A | 2016-02-03 | LEFRAK RICHARD S | DORCHESTER MINERALS, L.P. | 2,426,250 | 7.9% | EDGAR |
| SC 13G/A | 2015-02-10 | LEFRAK RICHARD S | DORCHESTER MINERALS, L.P. | 2,331,149 | 7.6% | EDGAR |
| SC 13G/A | 2014-02-12 | LEFRAK RICHARD S | DORCHESTER MINERALS, L.P. | 2,344,666 | 7.6% | EDGAR |
| SC 13G | 2013-01-30 | LEFRAK RICHARD S | DORCHESTER MINERALS, L.P. | 1,524,100 | 5.0% | EDGAR |
| SC 13G/A | 2013-01-10 | ENERGY TRUST LLC | DORCHESTER MINERALS, L.P. | - | - | EDGAR |
| SC 13G/A | 2012-02-03 | ENERGY TRUST LLC | DORCHESTER MINERALS, L.P. | - | - | EDGAR |
| SC 13G/A | 2011-01-28 | ENERGY TRUST LLC | DORCHESTER MINERALS LP | - | - | EDGAR |
| SC 13G/A | 2010-02-01 | ENERGY TRUST LLC | DORCHESTER MINERALS LP | - | - | EDGAR |
| SC 13G/A | 2009-01-29 | ENERGY TRUST LLC | DORCHESTER MINERALS LP | - | - | EDGAR |
| SC 13G/A | 2008-02-04 | ENERGY TRUST LLC | DORCHESTER MINERALS LP | - | - | EDGAR |
| SC 13G/A | 2007-01-26 | ENERGY TRUST LLC | DORCHESTER MINERALS LP | - | - | EDGAR |
| SC 13G/A | 2006-02-14 | MCMANEMIN WILLIAM CASEY | DORCHESTER MINERALS LP | 1,197,527 | 4.2% | EDGAR |
| SC 13G/A | 2006-02-08 | ENERGY TRUST LLC | DORCHESTER MINERALS LP | - | - | EDGAR |
| SC 13G | 2005-02-15 | MCMANEMIN WILLIAM CASEY | DORCHESTER MINERALS LP | 2,017,021 | 7.1% | EDGAR |
| SC 13G | 2004-02-17 | MCMANEMIN WILLIAM CASEY | DORCHESTER MINERALS LP | 4,139,779 | 15.3% | EDGAR |
| SC 13G | 2004-02-17 | PEAK PRESTON A | DORCHESTER MINERALS LP | 1,577,412 | 5.8% | EDGAR |
| SC 13G | 2004-02-17 | MCMANEMIN WILLIAM CASEY | DORCHESTER MINERALS LP | 4,139,779 | 15.3% | EDGAR |
| SC 13G | 2003-10-02 | ENERGY TRUST LLC | DORCHESTER MINERALS LP | - | - | EDGAR |