DORCHESTER MINERALS LP

Ticker: DMLP CUSIP: 25820R105 Class: COM UNIT

COMMONWEALTH OF PENNSYLVANIA PUBLIC SCHOOL EMPLS RETRMT SYS's Holding History (CIK: 0001083190)

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

Q3 2016
Shares 55,522 Value ($000) $856 Avg Close — Range —
Q2 2016
Shares 55,522 Value ($000) $801 Avg Close — Range —
Q1 2016
Shares 55,522 Value ($000) $632 Avg Close — Range —
Q4 2015
Shares 51,958 Value ($000) $514 Avg Close — Range —
Q3 2015
Shares 11,449 Value ($000) $166 Avg Close — Range —