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Filing Details

Issuer

Cik	Name	Symbol	Sector (SIC)	IRS No
1012140	Onyx Pharmaceuticals Inc	ONXX	Biological Products, (No Disgnostic Substances) (2836)	943154463

Insiders

Cik	Name	Reported Address	Insider Title	Director	Officer	Large Shareholder	Other
1225509	M Suzanne Shema	C/O Onyx Pharmaceuticals, Inc. 249 E. Grand Ave. South San Francisco CA 94080	Evp, Gc And Corp. Secretary	No	Yes	No	No

Reported Non-Derivative Transactions

Sec. Name	Acquisiton - Disposition	Date	Amount	Price	Remaning Holdings	Equity Swap Involved	Form Type	Code	Nature of Ownership
Common Stock	Acquisiton	2012-09-07	656	$30.28	43,053	No	4	M	Direct
Common Stock	Acquisiton	2012-09-07	1,345	$32.07	44,398	No	4	M	Direct
Common Stock	Disposition	2012-09-07	2,001	$77.88	42,397	No	4	S	Direct

Equity Swap Involved	Form Type	Code	Nature of Ownership
No	4	M	Direct
No	4	M	Direct
No	4	S	Direct

Reported Derivative Transactions

Sec. Name	Sec. Type	Acquisiton - Disposition	Date	Amount	Price	Amount - 2	Price - 2
Common Stock	Stock Option (Right to Buy)	Disposition	2012-09-07	656	$0.00	656	$30.28
Common Stock	Stock Option (Right to Buy)	Disposition	2012-09-07	1,345	$0.00	1,345	$32.07

Remaning Holdings	Exercise Date	Expiration Date	Equity Swap Involved	Transaction Form Type	Transaction Code	Nature of Ownership
12,469		2020-03-30	No	4	M	Direct
27,564		2019-08-31	No	4	M	Direct

Footnotes

Shares sold pursuant to 10b5-1 plan.
12.5% of the shares subject to the option become exercisable 6 months following the date of grant. The remaining shares become exercibale in equal monthly installments over the following 42 months for a total vesting of 48 months.
Twenty-five percent of the shares subject to the option vest and become exercisable one year from the date of grant and vest and become exercisable at a rate of 1/48th per month thereafter.