ON ASSIGNMENT INC

CUSIP: 682159108 Class: COM

Capital World Investors's Holding History (CIK: 0001422849)

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

Q4 2017

Shares 3,380,500 Value ($000) $217,265 Avg Close — Range —

Q3 2017

Shares 3,380,500 Value ($000) $181,465 Avg Close — Range —

Q2 2017

Shares 3,380,500 Value ($000) $183,054 Avg Close — Range —

Q1 2017

Shares 3,580,500 Value ($000) $173,762 Avg Close — Range —

Q4 2016

Shares 3,580,500 Value ($000) $158,115 Avg Close — Range —

Period	Shares	Value ($000)	Average Close	Price Range
Q4 2017	3,380,500	$217,265	—	—
Q3 2017	3,380,500	$181,465	—	—
Q2 2017	3,380,500	$183,054	—	—
Q1 2017	3,580,500	$173,762	—	—
Q4 2016	3,580,500	$158,115	—	—