ASGN Inc — Director's Dealing 2012

Feb 3, 2012

SEC Form 4 — Statement of Changes in Beneficial Ownership

Issuer: ON ASSIGNMENT INC (ASGN)
CIK: 0000890564
Period of Report: 2012-02-01

Reporting Person: DAMERIS PETER T (Director, President & CEO)

Non-Derivative Transactions

Date	Security	Code	Shares	Price	A/D	Holdings After	Ownership
2012-02-01	Common Stock	A	33784	—	Acquired	602772	Direct
2012-02-01	Common Stock	D	12860	$12.05	Disposed	589912	Direct

Footnotes

F1: 2010 CEO EBITDA Target Award - Performance Award granted on 3/17/2010. Goal Achieved for 2010. 50% vested on 2/1/11 and 50% vested on 2/1/12.

F2: Executive officer elected to satisfy tax withholding obligations upon vesting by having On Assignment, Inc. withhold a number of vested shares equal to that of the employee's tax liability.