MEDIDATA SOLUTIONS I

CUSIP: 58471A10 Class: COM

ARROWSTREET CAPITAL, LIMITED PARTNERSHIP's Holding History (CIK: 0001164508)

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

Q3 2016
Shares 7,200 Value ($000) $401 Avg Close — Range —
Q4 2015
Shares 14,100 Value ($000) $695 Avg Close — Range —
Q3 2015
Shares 6,700 Value ($000) $364 Avg Close — Range —
Q2 2015
Shares 6,700 Value ($000) $364 Avg Close — Range —