ON ASSIGNMENT INC

CUSIP: 682159108 Class: COM

SIMPLEX TRADING, LLC's Holding History (CIK: 0001488542)

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

Q4 2017
Shares 9,092 Value ($000) $584 Avg Close — Range —
Q3 2017
Shares 737 Value ($000) $39 Avg Close — Range —
Q3 2016
Shares 200 Value ($000) $7 Avg Close — Range —
Q4 2015
Shares 2,497 Value ($000) $112 Avg Close — Range —
Q3 2015
Shares 335 Value ($000) $12 Avg Close — Range —
Q4 2014
Shares 193 Value ($000) $6 Avg Close — Range —