NORTHERN OIL & GAS INC NEV

CUSIP: 665531109 Class: COM

OBERWEIS ASSET MANAGEMENT INC/'s Holding History (CIK: 0000937886)

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

Q4 2013
Shares 31,200 Value ($000) $470 Avg Close — Range —
Q3 2013
Shares 28,500 Value ($000) $411 Avg Close — Range —
Q2 2013
Shares 57,800 Value ($000) $771 Avg Close — Range —