ASGN Inc — Director's Dealing 2012

Jan 5, 2012

SEC Form 4 — Statement of Changes in Beneficial Ownership

Issuer: ON ASSIGNMENT INC (ASGN)
CIK: 0000890564
Period of Report: 2012-01-02

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

Non-Derivative Transactions

Date	Security	Code	Shares	Price	A/D	Holdings After	Ownership
2012-01-02	Common Stock	D	3604	$11.18	Disposed	105090	Direct
2012-01-03	Common Stock	A	13612	—	Acquired	118702	Direct
2012-01-03	Common Stock	D	2186	$11.02	Disposed	116516	Direct
2012-01-04	Common Stock	D	2643	$11.05	Disposed	113873	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.

F2: 60% of this award vests in three equal annual installments. The remaining 40% is subject to certain annual performance targets set by the Company.