MFRI INC

CUSIP: 552721102 Class: COMMON STOCK

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

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

Q3 2016
Shares 185 Value ($000) $1 Avg Close — Range —
Q2 2016
Shares 385 Value ($000) $3 Avg Close — Range —
Q1 2016
Shares 1,800 Value ($000) $13 Avg Close — Range —