ASGN Inc — Director's Dealing 2012

Dec 12, 2012

SEC Form 4 — Statement of Changes in Beneficial Ownership

Issuer: ON ASSIGNMENT INC (ASGN)
CIK: 0000890564
Period of Report: 2012-12-10

Reporting Person: DAMERIS PETER T (President & CEO)

Non-Derivative Transactions

Date	Security	Code	Shares	Price	A/D	Holdings After	Ownership
2012-12-10	Common Stock	M	10075	$4.45	Acquired	608875	Direct
2012-12-10	Common Stock	S	10075	$19.6103	Disposed	598800	Direct
2012-12-10	Common Stock	S	11662	$19.6103	Disposed	587138	Direct
2012-12-11	Common Stock	M	29925	$6.68	Acquired	617063	Direct
2012-12-11	Common Stock	S	29925	$19.5648	Disposed	587138	Direct

Derivative Transactions

Date	Security	Exercise Price	Code	Shares	A/D	Expiration	Underlying	Ownership
2012-12-10	Non-Qualified Stock Option (right to buy)	$4.45	M	10075	Disposed	2014-09-27	Common Stock (10075)	Direct
2012-12-11	Non-Qualified Stock Option (right to buy)	$6.68	M	29925	Disposed	2015-08-29	Common Stock (29925)	Direct

Footnotes

F1: These options vest one twenty-fourth on November 27, 2004, and one forty-eighth of such amount with respect to each month thereafter.

F2: These options vest one forty-eighth after one month from the grant date, and one forty-eighth of such amount with respect to each month thereafter.