ON ASSIGNMENT INC

CUSIP: 682159108 Class: COM

NORTHERN TRUST CORP's Holding History (CIK: 0000073124)

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

Q1 2018
Shares 576,891 Value ($000) $47,236 Avg Close — Range —
Q4 2017
Shares 651,811 Value ($000) $41,893 Avg Close — Range —
Q3 2017
Shares 673,217 Value ($000) $36,139 Avg Close — Range —
Q2 2017
Shares 677,990 Value ($000) $36,713 Avg Close — Range —
Q1 2017
Shares 658,730 Value ($000) $31,968 Avg Close — Range —
Q4 2016
Shares 647,959 Value ($000) $28,613 Avg Close — Range —
Q3 2016
Shares 715,844 Value ($000) $25,978 Avg Close — Range —
Q2 2016
Shares 715,917 Value ($000) $26,453 Avg Close — Range —
Q1 2016
Shares 709,172 Value ($000) $26,180 Avg Close — Range —
Q4 2015
Shares 698,169 Value ($000) $31,383 Avg Close — Range —
Q3 2015
Shares 686,054 Value ($000) $25,316 Avg Close — Range —
Q2 2015
Shares 575,730 Value ($000) $22,615 Avg Close — Range —
Q1 2015
Shares 700,646 Value ($000) $26,883 Avg Close — Range —
Q4 2014
Shares 700,039 Value ($000) $23,234 Avg Close — Range —
Q3 2014
Shares 692,826 Value ($000) $18,602 Avg Close — Range —
Q2 2014
Shares 591,164 Value ($000) $21,028 Avg Close — Range —
Q1 2014
Shares 681,503 Value ($000) $26,299 Avg Close — Range —
Q4 2013
Shares 678,710 Value ($000) $23,702 Avg Close — Range —
Q3 2013
Shares 710,987 Value ($000) $23,463 Avg Close — Range —
Q2 2013
Shares 699,613 Value ($000) $18,694 Avg Close — Range —