ON SEMICONDUCTOR CORP — Director's Dealing 2011

Jan 5, 2011

SEC Form 4 — Statement of Changes in Beneficial Ownership

Issuer: ON SEMICONDUCTOR CORP (ONNN)
CIK: 0001097864
Period of Report: 2011-01-03

Reporting Person: COLVIN DONALD A (Exec VP & CFO)

Non-Derivative Transactions

Date	Security	Code	Shares	Price	A/D	Holdings After	Ownership
2011-01-03	Common	M	25000.0000	$4.8000	Acquired	572661.0000	Direct
2011-01-03	Common	S	25000.0000	$10.0500	Disposed	547661.0000	Direct

Derivative Transactions

Date	Security	Exercise Price	Code	Shares	A/D	Expiration	Underlying	Ownership
2011-01-03	Stock Option (right to buy)	$4.8000	M	25000.0000	Disposed	2015-02-17	Common (25000.0000)	Direct