ASGN Inc — Director's Dealing 2011

Feb 22, 2011

SEC Form 4 — Statement of Changes in Beneficial Ownership

Issuer: ON ASSIGNMENT INC (ASGN)
CIK: 0000890564
Period of Report: 2011-02-17

Reporting Person: Brouse Mark (President, Vista Staffing)

Non-Derivative Transactions

Date	Security	Code	Shares	Price	A/D	Holdings After	Ownership
2011-02-17	Common Stock	D	541	$8.89	Disposed	138334	Direct
2011-02-17	Common Stock	A	3505	—	Acquired	141839	Direct
2011-02-17	Common Stock	D	1067	$8.89	Disposed	140772	Direct
2011-02-17	Common Stock	A	8128	—	Acquired	148900	Direct
2011-02-17	Common Stock	D	2474	$8.89	Disposed	146426	Direct
2011-02-17	Common Stock	A	9148	—	Acquired	155574	Direct
2011-02-17	Common Stock	D	2785	$8.89	Disposed	152789	Direct

Holdings (Non-Derivative)

Security	Shares	Ownership
Common Stock	8500	Indirect

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: Performance Award granted 3/17/10. Goal Acheived - Based on Adjusted EBITDA