A. Robert Klosterboer

Insider Trading: Sales

Company	Symbol	Price	Amount	Relationship	Remaining Holdings	Date	Form 4
On Semiconductor Corp	ONNN	$8.30	2,000	Officer	13,950	2009-12-10	Filing
On Semiconductor Corp	ONNN	$8.24	3,000	Officer	15,950	2009-12-08	Filing
On Semiconductor Corp	ONNN	$8.01	7,500	Officer	18,950	2009-12-01	Filing
On Semiconductor Corp	ONNN	$8.21	7,500	Officer	12,874	2009-09-01	Filing
On Semiconductor Corp	ONNN	$8.01	700	Officer	20,374	2009-08-26	Filing
On Semiconductor Corp	ONNN	$7.95	9,356	Officer	21,074	2009-08-25	Filing
On Semiconductor Corp	ONNN	$7.89	4,931	Officer	30,430	2009-08-24	Filing
On Semiconductor Corp	ONNN	$7.49	11,500	Officer	35,361	2009-08-07	Filing
On Semiconductor Corp	ONNN	$7.60	7,406	Officer	35,321	2009-07-21	Filing