ASGN Inc — Director's Dealing 2011

Nov 15, 2011

SEC Form 4 — Statement of Changes in Beneficial Ownership

Issuer: ON ASSIGNMENT INC (ASGN)
CIK: 0000890564
Period of Report: 2011-11-11

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

Non-Derivative Transactions

Date	Security	Code	Shares	Price	A/D	Holdings After	Ownership
2011-11-11	Common Stock	M	7015	$5.22	Acquired	611050	Direct
2011-11-11	Common Stock	S	7015	$11.0379	Disposed	604035	Direct
2011-11-14	Common Stock	M	800	$5.22	Acquired	604835	Direct
2011-11-14	Common Stock	S	800	$11.0256	Disposed	604035	Direct
2011-11-15	Common Stock	M	11209	$5.22	Acquired	615244	Direct
2011-11-15	Common Stock	S	11209	$11	Disposed	604035	Direct
2011-11-15	Common Stock	M	793	$5.22	Acquired	604828	Direct
2011-11-15	Common Stock	S	793	$11.01	Disposed	604035	Direct

Derivative Transactions

Date	Security	Exercise Price	Code	Shares	A/D	Expiration	Underlying	Ownership
2011-11-11	Non-Qualified Stock Option (right to buy)	$5.22	M	7015	Disposed	2013-11-12	Common Stock (7015)	Direct
2011-11-14	Non-Qualified Stock Option (right to buy)	$5.22	M	800	Disposed	2013-11-12	Common Stock (800)	Direct
2011-11-15	Non-Qualified Stock Option (right to buy)	$5.22	M	11209	Disposed	2013-11-12	Common Stock (11209)	Direct
2011-11-15	Non-Qualified Stock Option (right to buy)	$5.22	M	793	Disposed	2013-11-12	Common Stock (793)	Direct

Footnotes

F1: These options vest one-fourth of the total number of shares on November 3, 2004, and one forty-eighth of such amount with respect to each month thereafter.