MEDIDATA SOLUTIONS INC

CUSIP: 58471A105 Class: COM

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

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

Q2 2014
Shares 36,164 Value ($000) $1,548 Avg Close — Range —
Q1 2014
Shares 239,890 Value ($000) $13,036 Avg Close — Range —
Q4 2013
Shares 236,340 Value ($000) $14,299 Avg Close — Range —
Q3 2013
Shares 128,748 Value ($000) $12,737 Avg Close — Range —
Q2 2013
Shares 253,679 Value ($000) $19,647 Avg Close — Range —