ON ASSIGNMENT INC

CUSIP: 682159108 Class: COM

ESSEX INVESTMENT MANAGEMENT CO LLC's Holding History (CIK: 0000201772)

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

Q1 2014
Shares 60,990 Value ($000) $2,354 Avg Close — Range —
Q4 2013
Shares 38,724 Value ($000) $1,352 Avg Close — Range —
Q3 2013
Shares 36,488 Value ($000) $1,204 Avg Close — Range —
Q2 2013
Shares 39,299 Value ($000) $1,050 Avg Close — Range —