ON ASSIGNMENT INC

CUSIP: 682159108 Class: COM

Parallax Volatility Advisers, L.P.'s Holding History (CIK: 0001521001)

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

Q1 2018
Shares 1 Value ($000) $0 Avg Close — Range —
Q4 2017
Shares 12,032 Value ($000) $773 Avg Close — Range —
Q1 2017
Shares 259 Value ($000) $13 Avg Close — Range —
Q3 2016
Shares 155 Value ($000) $6 Avg Close — Range —
Q1 2015
Shares 1,361 Value ($000) $52 Avg Close — Range —
Q4 2014
Shares 5,630 Value ($000) $187 Avg Close — Range —
Q3 2014
Shares 457 Value ($000) $12 Avg Close — Range —
Q2 2014
Shares 464 Value ($000) $17 Avg Close — Range —
Q4 2013
Shares 58 Value ($000) $2 Avg Close — Range —
Q3 2013
Shares 234 Value ($000) $8 Avg Close — Range —