ON ASSIGNMENT INC

CUSIP: 682159108 Class: COM

PRINCIPAL FINANCIAL GROUP INC's Holding History (CIK: 0001126328)

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

Q1 2018
Shares 13,578 Value ($000) $1,112 Avg Close — Range —
Q4 2017
Shares 866,392 Value ($000) $55,683 Avg Close — Range —
Q3 2017
Shares 869,233 Value ($000) $46,661 Avg Close — Range —
Q2 2017
Shares 849,237 Value ($000) $45,986 Avg Close — Range —
Q1 2017
Shares 379,183 Value ($000) $18,401 Avg Close — Range —
Q4 2016
Shares 364,476 Value ($000) $16,095 Avg Close — Range —
Q3 2016
Shares 365,721 Value ($000) $13,272 Avg Close — Range —
Q2 2016
Shares 348,505 Value ($000) $12,877 Avg Close — Range —
Q1 2016
Shares 338,242 Value ($000) $12,488 Avg Close — Range —
Q4 2015
Shares 610,513 Value ($000) $27,443 Avg Close — Range —
Q3 2015
Shares 622,954 Value ($000) $22,987 Avg Close — Range —
Q2 2015
Shares 605,121 Value ($000) $23,769 Avg Close — Range —
Q1 2015
Shares 650,986 Value ($000) $24,978 Avg Close — Range —
Q4 2014
Shares 645,929 Value ($000) $21,439 Avg Close — Range —
Q3 2014
Shares 662,223 Value ($000) $17,780 Avg Close — Range —
Q2 2014
Shares 576,057 Value ($000) $20,491 Avg Close — Range —
Q1 2014
Shares 576,164 Value ($000) $22,234 Avg Close — Range —
Q4 2013
Shares 562,060 Value ($000) $19,627 Avg Close — Range —
Q3 2013
Shares 266,820 Value ($000) $8,805 Avg Close — Range —
Q2 2013
Shares 249,042 Value ($000) $6,654 Avg Close — Range —