IMAGE SENSING SYS INC

CUSIP: 45244C104 Class: COM

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

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

Q3 2016
Shares 11,571 Value ($000) $45 Avg Close — Range —
Q1 2016
Shares 1,001 Value ($000) $3 Avg Close — Range —