ASGN Inc — Director's Dealing 2013

Sep 10, 2013

SEC Form 4 — Statement of Changes in Beneficial Ownership

Issuer: ON ASSIGNMENT INC (ASGN)
CIK: 0000890564
Period of Report: 2013-09-07

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

Non-Derivative Transactions

Date	Security	Code	Shares	Price	A/D	Holdings After	Ownership
2013-09-07	Common Stock	D	202	$31.82	Disposed	11767	Direct
2013-09-10	Common Stock	S	2094	$33	Disposed	9673	Direct
2013-09-10	Common Stock	M	1406	$7.31	Acquired	11079	Direct
2013-09-10	Common Stock	S	1406	$33	Disposed	9673	Direct

Derivative Transactions

Date	Security	Exercise Price	Code	Shares	A/D	Expiration	Underlying	Ownership
2013-09-10	Non-Qualified Stock Option (right to buy)	$7.31	M	1406	Disposed	2019-12-10	Common Stock (1406)	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: One-fourth of this option grant dated December 10, 2009 vested on December 10, 2010 and one forty-eighth of the grant vested thereafter on each monthly anniversary of the grant date.