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: McGowan Michael (CEO - Oxford Global Resources)

Non-Derivative Transactions

Date	Security	Code	Shares	Price	A/D	Holdings After	Ownership
2011-02-17	Common Stock	D	501	$8.89	Disposed	275626	Direct
2011-02-17	Common Stock	A	7928	—	Acquired	283554	Direct
2011-02-17	Common Stock	D	2517	$8.89	Disposed	281037	Direct
2011-02-17	Common Stock	A	3200	—	Acquired	284237	Direct
2011-02-17	Common Stock	D	1016	$8.89	Disposed	283221	Direct
2011-02-17	Common Stock	A	11758	—	Acquired	294979	Direct
2011-02-17	Common Stock	D	3733	$8.89	Disposed	291246	Direct

Holdings (Non-Derivative)

Security	Shares	Ownership
Common Stock	5000	Indirect

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