ASGN Inc — Director's Dealing 2012

May 21, 2012

SEC Form 4 — Statement of Changes in Beneficial Ownership

Issuer: ON ASSIGNMENT INC (ASGN)
CIK: 0000890564
Period of Report: 2012-05-15

Reporting Person: BLAZER RANDOLPH C (President of Apex Systems, Inc, President of Apex Systems, Inc)

Non-Derivative Transactions

Date	Security	Code	Shares	Price	A/D	Holdings After	Ownership
2012-05-15	Common Stock	A	19737	—	Acquired	280652	Direct

Footnotes

F1: The restricted stock units vest and become exercisable in equal annual installments over a three-year period on the first three anniversaries of the grant date subject to the Reporting Person's continued employment or service relationship with the issuer on each of the vesting dates.