DATALINK CORP

CUSIP: 237934104 Class: COMMON STOCK

Walleye Trading LLC's Holding History (CIK: 0001388391)

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

Q4 2016
Shares 12,900 Value ($000) $145 Avg Close — Range —
Q3 2016
Shares 11,500 Value ($000) $122 Avg Close — Range —
Q2 2016
Shares 7,700 Value ($000) $58 Avg Close — Range —
Q1 2016
Shares 3,000 Value ($000) $27 Avg Close — Range —
Q4 2015
Shares 11,000 Value ($000) $75 Avg Close — Range —
Q2 2015
Shares 100 Value ($000) $1 Avg Close — Range —