ASGN Inc — Director's Dealing 2012

Sep 14, 2012

SEC Form 4 — Statement of Changes in Beneficial Ownership

Issuer: ON ASSIGNMENT INC (ASGN)
CIK: 0000890564
Period of Report: 2012-09-12

Reporting Person: Gibson Christina (V.P., Finance and Controller)

Non-Derivative Transactions

Date	Security	Code	Shares	Price	A/D	Holdings After	Ownership
2012-09-12	Common Stock	M	1375	$5.54	Acquired	8091	Direct
2012-09-12	Common Stock	S	1375	$16.9527	Disposed	6716	Direct
2012-09-12	Common Stock	M	593	$8.26	Acquired	7309	Direct
2012-09-12	Common Stock	S	593	$16.9527	Disposed	6716	Direct

Derivative Transactions

Date	Security	Exercise Price	Code	Shares	A/D	Expiration	Underlying	Ownership
2012-09-12	Non-Qualified Stock Option (right to buy)	$5.54	M	1375	Disposed	2019-01-02	Common Stock (1375)	Direct
2012-09-12	Non-Qualified Stock Option (right to buy)	$8.26	M	593	Disposed	2021-01-19	Common Stock (593)	Direct

Footnotes

F1: One-fourth of the total number of options vest twelve months following the grant date and one forty-eighth of such amount vests thereafter on each monthly anniversary of the grant date.