ASGN Inc — Director's Dealing 2011

Feb 22, 2011

SEC Form 4 — Statement of Changes in Beneficial Ownership

Issuer: ON ASSIGNMENT INC (ASGN)
CIK: 0000890564
Period of Report: 2011-02-17

Reporting Person: McGrath Emmett (President, Lab Support)

Non-Derivative Transactions

Date	Security	Code	Shares	Price	A/D	Holdings After	Ownership
2011-02-17	Common Stock	D	603	$8.89	Disposed	124633	Direct
2011-02-17	Common Stock	A	4505	—	Acquired	129138	Direct
2011-02-17	Common Stock	D	1652	$8.89	Disposed	127486	Direct
2011-02-17	Common Stock	A	10448	—	Acquired	137934	Direct
2011-02-17	Common Stock	D	3832	$8.89	Disposed	134102	Direct
2011-02-17	Common Stock	A	11758	—	Acquired	145860	Direct
2011-02-17	Common Stock	D	4312	$8.89	Disposed	141548	Direct

Footnotes

F1: 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.

F2: Performance Award granted 3/17/10. Goal Acheived - Based on Adjusted EBITDA