ASGN Inc — Director's Dealing 2013

Jan 4, 2013

SEC Form 4 — Statement of Changes in Beneficial Ownership

Issuer: ON ASSIGNMENT INC (ASGN)
CIK: 0000890564
Period of Report: 2012-12-31

Reporting Person: McGrath Emmett (Pres, Life Sciences &Allied HC)

Non-Derivative Transactions

Date	Security	Code	Shares	Price	A/D	Holdings After	Ownership
2012-12-31	Common Stock	D	2118	$20.28	Disposed	116046	Direct
2012-12-31	Common Stock	D	3153	$20.28	Disposed	112893	Direct
2012-12-31	Common Stock	D	2742	$20.28	Disposed	110151	Direct
2012-12-31	Common Stock	A	4504	—	Acquired	114655	Direct
2012-12-31	Common Stock	D	2102	$20.28	Disposed	112553	Direct
2012-12-31	Common Stock	A	3917	—	Acquired	116470	Direct
2012-12-31	Common Stock	D	1828	$20.28	Disposed	114642	Direct
2012-12-31	Common Stock	A	3025	—	Acquired	117667	Direct
2012-12-31	Common Stock	D	1412	$20.28	Disposed	116255	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.