DORCHESTER MINERALS LP

Ticker: DMLP CUSIP: 25820R105 Class: COM UNIT

AMG National Trust Bank's Holding History (CIK: 0001388829)

Note: Option positions (PUT/CALL) are excluded.

Q3 2016
Shares 16,198 Value ($000) $250 Avg Close — Range —
Q2 2016
Shares 29,038 Value ($000) $419 Avg Close — Range —
Q1 2016
Shares 33,988 Value ($000) $387 Avg Close — Range —
Q4 2015
Shares 34,758 Value ($000) $344 Avg Close — Range —
Q3 2015
Shares 16,023 Value ($000) $231 Avg Close — Range —
Q2 2015
Shares 16,339 Value ($000) $350 Avg Close — Range —
Q1 2015
Shares 17,560 Value ($000) $399 Avg Close — Range —
Q4 2014
Shares 16,961 Value ($000) $433 Avg Close — Range —
Q3 2014
Shares 16,251 Value ($000) $480 Avg Close — Range —
Q2 2014
Shares 28,609 Value ($000) $873 Avg Close — Range —
Q1 2014
Shares 29,344 Value ($000) $769 Avg Close — Range —
Q4 2013
Shares 29,561 Value ($000) $768 Avg Close — Range —
Q3 2013
Shares 31,180 Value ($000) $745 Avg Close — Range —
Q2 2013
Shares 32,011 Value ($000) $784 Avg Close — Range —