GSE SYS INC

CUSIP: 36227K106 Class: COM

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

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

Q1 2017
Shares 1,924 Value ($000) $7 Avg Close — Range —
Q4 2016
Shares 1,800 Value ($000) $6 Avg Close — Range —
Q3 2016
Shares 7,500 Value ($000) $22 Avg Close — Range —
Q2 2016
Shares 6,000 Value ($000) $13 Avg Close — Range —
Q1 2016
Shares 3,700 Value ($000) $10 Avg Close — Range —