ON ASSIGNMENT INC

CUSIP: 682159108 Class: COM

HighTower Advisors, LLC's Holding History (CIK: 0001462245)

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

Q2 2016

Shares 17,372 Value ($000) $640 Avg Close — Range —

Q4 2013

Shares 36,095 Value ($000) $1,260 Avg Close — Range —

Q3 2013

Shares 33,300 Value ($000) $1,103 Avg Close — Range —

Q2 2013

Shares 30,605 Value ($000) $818 Avg Close — Range —

Period	Shares	Value ($000)	Average Close	Price Range
Q2 2016	17,372	$640	—	—
Q4 2013	36,095	$1,260	—	—
Q3 2013	33,300	$1,103	—	—
Q2 2013	30,605	$818	—	—