ON ASSIGNMENT INC

CUSIP: 682159108 Class: COM

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

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

Q1 2018
Shares 13,374 Value ($000) $1,095 Avg Close — Range —
Q4 2017
Shares 5,116 Value ($000) $329 Avg Close — Range —
Q3 2017
Shares 1,572 Value ($000) $84 Avg Close — Range —
Q2 2017
Shares 1,057 Value ($000) $57 Avg Close — Range —
Q1 2017
Shares 5,057 Value ($000) $245 Avg Close — Range —
Q4 2016
Shares 757 Value ($000) $33 Avg Close — Range —
Q3 2016
Shares 1,957 Value ($000) $71 Avg Close — Range —
Q4 2015
Shares 141 Value ($000) $6 Avg Close — Range —
Q2 2015
Shares 1,684 Value ($000) $66 Avg Close — Range —